NC0020036_Regional Office Historical File Pre 2018 (7)

State of North Carolina Department of Environment, iri
Health and Natural Resources A119111Y111:A
Division of Water Quality
wilr
James B. Hunt, Jr., Governor '
Jonathan B. Howes, Secretary C) E H N R
A. Preston Howard, Jr., P,E., Director
N.C. DEPT. OF
August 30, 1996 ENVIRONMENT, HEALTh
e NATURAL RESOURCES
SEP 12 1996
Mr. Gary E. Parker, Town Manager DIVISION OF ENVIRONMENTAL MANAGEMENT
Town of Stanley MOORESVILLE REGIONAL OFFICE
Post Office Box 279
Stanley, North Carolina 28164
SUBJECT: Town of Stanley
Engineering Amendment
to the 201 Facilities Plan
Project No. E-SBF-T-95-0R20
Dear Mr. Parker:
The Construction Grants & Loans Section has completed its review of the subject
Engineering Amendment to the 201 Facilities Plan and has the attached comments. Two (2)
copies of a revised Engineering Amendment which incorporate responses to these comments
should be submitted for our review and approval as soon as possible.
If you have any questions concerning this matter, please contact Ryan Scruggs at (919)
715-6209. •
Sincerely,
C--)
4
yak Jay B. L cas, P.E., perviso
Facilities Evaluation Unit
RMS/kc
Attachment (all cc's)
cc: W.K. Dickson
101110
as
DMU/FEU/SBF
Construction Grants&Loans Section arkill FAX [phone]
P.O. Box 29579,Raleigh,North Carolina 27626 0579 �� An Equal FAX
Action Employer
Voice 919-733-6900 Reduce Reuse Recycle 50%recycles/10%post-consumer paper

TOWN OF STANLEY
Revised Technical Review Comments for the
Engineering Amendment to 201 Facilities Plan
1. Please provide calculations for pump station cycle time and pump run time for the
Dutchmans Creek Pump Station(DCPS). Verify with calculations that the
Dutchmans Creek Pump Station(DCPS) is capable of handling 4150 gpm with
the largest of the three (3) 120 hp pumps out of service.
2. The sewer interconnect present worth analysis in Table 5 on page 10 appears to
contain an addition error in the calculation of the Total Present Worth for Option
3. Please correct this error and, in addition, include the salvage value and the
present worth of salvage value for each option. A basis must be provided for the
determination of the salvage values for each option. Typically, transport pipelines
have a 50 year useful life. Therefore, construction costs associated with pipelines
will result in a salvage value of 3/5 of the original construction cost in a 20-year
present worth analysis.
3. Using the information provided on page 8, provide calculations for the
determination of the residential user fees (for 5000 gallons/month) for the Town
of Stanley when the town must provide their share of the cost for the future Mt.
Holly WWTP expansion in FY 2002/2003.
4. Clearly define what portion of the Stanley service area will be directed to the Mt.
Holly interconnect sewer on the map after page 6. Also identify the current
amount of flow and the 20-year design flow from this portion of the Stanley
service area.
5. Please identify the source of the 123,800 gpd 20-year design flow into Line
Segment 6-5.
6. Table 1 on page 4 shows the total WWTP project cost as $1,312,500, but page 8
states that the cost estimate is $1,323,000. Please revise the report where
necessary.
7. The Outfall Basis of Design for Option 3 table on page 5 of 24 and 6 of 24 in the
Sewer Interconnect Design Notes contains the following inconsistencies:
a. Line Segment 1-DCPS is identified as a 36" outfall rather than as a 30"
outfall used in Table 3 and the Enlarged Plan of the Sewer Interconnect
Schematic after page 8.
b. Basin K flow in Line Segment 1-DCPS is less than the Basin K flow in
Line Segment 2-3 and 2-1.

Line 1-DCPS Design ADF = 111,900 gpd
Line 2-3 and Line 2-1 Design ADF = 114,700 gpd
c. No basis is provided for the Design ADF of 135,000 gpd in Basin"A" and
the Design ADF of 362,500 gpd in Basin"G". Please provide the basis
for the future 20-year design flow for these basins not shown on page 14
of 24 and 15 of 24.
d. Please revise the Design ADF for Line Segment 2-3 in Table 3 on page 7
to match the Line Segment 2-3 Design ADF of 1,196,570 gpd.
e. Please explain the d/D @ Peak Ratio of 103 % for Line Segment 3-4.
8. Please specify what portion of the 494,000 gpd Stanley WWTP flow and the
366,270 gpd sewer line to Mt. Holly flow in Table 2a are current flows and what
portion are 20-year design flows. Provide calculations for this determination.
Also specify the current and future flows for the Stanley WWTP and the sewer
line to Mt. Holly once the additional capacity Mt. Holly WWTP is placed on line
and provide a basis for your assumptions.
9. Please advise how the Table 2a flow splits correlate with the Outfall Basis of
Design for Option 3 table on page 5 of 24 and 6 of 24 in the Sewer Interconnect
Design Notes.
10. The parallel Line Segment 2-3 with 4628 LF of 12" outfall and the existing 15"
outfall appears incapable of transporting the Peak Design ADF flowing half full.
Please verify the capacity of the parallel Line Segment 2-3 with calculations.
11. One public hearing, with a 15-day notification, is required. A copy of the
engineering amendment to the facility plan should be made available for review
by the public at least 10 days prior to the public hearing.
The hearing should cover the following items:
a. Identify the problem.
b. Discuss the selected alternative.
c. Identify the size of the projected loan.
d. Discuss any associated interlocal agreements.
e. Identify the effect that the Stanley WWTP/ Sewer
Interconnect to Mt. Holly project will have on the typical
residential users monthly sewer bill as well as the effect that the
future Capacity Expansion of the Mt. Holly WWTP project in FY
2002/2003 will have on the typical residential users monthly sewer
bill.

,
The advertisement should provide the following information:
a. Identify the time and location of the public hearing.
b. Advise where and when a copy of the engineering amendment to
the facility plan can be observed.
c. Provide a brief description of the proposed project.
d. Advise how much funds are required and identify the source of
funding.
12. Provide a transcript or detailed summary of hearing and affidavit of publication.
13. Provide a copy of the interlocal sewer interconnect agreement to be entered into
by Gaston County and the Town(page 2, section 6.1.) as soon as it becomes
available.
14. We understand that the intermunicpal agreement requires the City of Mt. Holly to
be the lead agency for the construction of the sewer interconnect project. This is
acceptable to us; however, all progress payments from Construction Grants &
Loans will be made to the Town of Stanley based on reimbursement requests with
supporting documentation submitted by the Town of Stanley. Bids must be in
hand for all projects at or about the same time because Construction Grants &
Loans will only issue one Authorization to Award to cover all of the projects
related to the Town of Stanley.
15. Please address the attached Environmental Assessment comments.

4
ENVIRONMENTAL COMMENTS
4 Amended Stanley Facilities Plan ().
August 28, 1996
1. The U.S. Corps of Engineers should evaluate the project to confirm the presence of
jurisdictional areas and to determine if permit conditions will be required to construct.
2. What is the name of the surface water in which Mt. Holly's effluent is presently
discharged? A brief description of the basin and the stream's water quality should be
provided.
3. A copy or summary of the public hearing should be provided. Document that the public
hearing was properly advertised.
4. Review comments were received from several agencies, and all comments will be
provided if requested. The attached comments require an appropriate response, and they
are from: N.C. Wildlife Resources Commission, Division of Parks and Recreation,
Division of Forest Resources, Division of Air Quality, Office of Waste Reduction,
Division of Archives and History, and U.S. Fish and Wildlife Service.
•
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, NCWRC , HCP , FALLS LAKE TEL : [phone] Jun 20 '96 12 :35 No . 001 P . 03
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0 North Carolina Wildlife Resources Commission
512 N. Salisbury Street,Raleigh,North Carolina 27604-1188, 919-733-3391
Charles R.Fullwood, Executive Director
' MEMORAN Ili N1
TO: Melba McGee, Legislative and Intergovernmental Affairs
Dept. of Environment, Health, and Natural Resources
FROM: Stephanie E. Goudreau, Mt. Region Coordinator „id
Habitat Conservation Program
DATE: June 20, 1996
SUBJECT: I)EHNR No. 790, Engineering Amendment to the Town of Stanley 201 Facilities
Plan, Gaston County.
This correspondence responds to a request by you for our review and comments regarding
the Engineering Amendment to the Town of Stanley 201 Facilities Plan in Gaston County. We
previously commented in a memorandum to you dated 15 June 1994 on the Towns plan to
increase the capacity of its wastewater treatment plant to 1.0 million gallons per day (MGD).
The Town of Stanley is now proposing to keep the capacity of the wastewater treatment
plant at 0.500 MOD and purchase 0.500 MGD of treatment capacity from the Mount Holly
facility. A sewer interconnect will be constructed along NC 27 between the two sewer systems
to convey wastewater from Stanley to Mount Holly for treatment. The Town of Stanley also
plans to improve existing facilities at their wastewater treatment plant.
We have no objection to this amendment, and concur with the findings of the
Environmental Assessment included in the report. We have the following suggestions for
minimizing adverse impacts from sewer lines:
1) Project sponsors should contact the U.S. Army Corps of Engineers for a 404 permit
application. Contact is Mr. Steve Chapin at 704/271-4014.
2) Where crossings are necessary, sewer lines should cross streams at right angles to
minimize impacts to riparian areas.
3) Sewer lines crossing streams should be buried in the stream bottom or attached to
existing bridges to maintain fish movement upstream and downstream and prevent debris
from collecting at the pipe and causing a hydrologic change. We do not recommend
installing priers in a stream channel to support a sewer line.

NCt,j C , HCP ,FALLS LAKE TEL :[phone] Jun 20 ' 9t; 12 : 36 No . 001 P .04
4) An undisturbed buffer zone should he left between streams and all construction. We
prefer a buffer zone of at least 50 feet to control sedimentation into streams, provide
shade, and maintain a travel corridor for wildlife.
5) A portion of the right-of-way (one acre) should be planted with VA-70 lespedeza, Korean
lespedeza, ladino clover, and/or partridge pea to provide food and additional habitat for
wildlife.
6) If necessary, ROW areas should be mowed not more than once every 2-3 years. Mowing
should he done in February and March only to protect small game nesting later in the
year.
7) Stringent erosion control measures should be implemented where soil is disturbed and
maintained until project completion.
8) Temporary or permanent herbaceous vegetation should be planted on all bare soil within
15 days of ground disturbing activities to provide long-term erosion control. We prefer a
"seed as you go" strategy rather than allowing a large area to remain bare.
Thank you ibr the opportunity to review and comment on this project. If you have any
questions regarding these comments, please contact me at 704/652-4257.

State of North Carolina
Department of Environment,
Health and Natural Resources AI;
Division of Parks & Recreation
James B. Hunt, Jr., Governor p � H NJ F�
Jonathan B. Howes, Secretary
Dr, Philip K. McKnelly, Director
June 18, 1996
Memorandum
TO: Melba McGee
FROM: Stephen Hall S
SUBJECT: 201 Facilities Plan Amendment -- Sewer Interconnection between Stanley and
Mount Holly, Gaston County
REFERENCE: 790
The biological assessment conducted for this project appears to be quite thorough. The
Division accepts the findings that over most of the length of the project, environmental
impacts are likely to be minor and can be contained through use of best management
practices. We are concerned, however, about the impacts to the high quality stand of mesic
forest that exists along the project corridor downstream from the Twin Brooks pump station.
This site contains a significant stand of the bigleaf magnolia (Magnolia macrophylla), a
species regarded as significantly rare in North Carolina, and was previously identified by the
Natural Heritage Program as a Priority Natural Heritage Area. As discussed in the
biological assessment, the preferred alignment for the sewer interconnection would eliminate
approximately fifty individuals of the magnolia, which, according to our records, includes
most of the population.
We strongly recommend that the alignment be modified in this section of the project
corridor. From the report, as well as Natural Heritage Program data, an alignment running
along the east side of South Stanley Creek would have the fewest impacts to the magnolia
population and the high quality mesic forest to which it belongs.
P.O. Box 27687,Raleigh, North Carolina 27611-7687 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50%recycled/ 10%post-consumer paper

State of North Carolina
Department of Environment,
Health and Natural Resources •
Division of Forest Resources ANF
James B. Hunt, Jr., Governor CO N N F.
Jonathan B. Howes, Secretary
Stanford M. Adams, Director
Griffiths Forestry Center
2411 Old US 70 West
Clayton, North Carolina 27520
June 6, 1996
MEMORANDUM
TO: Melba McGee-Office of Legislative Affairs
FROM: Don H. Robbins, Staff Forestera6'
SUBJECT: Engineering Amendment to the Town of Stanley 201 Facilities Plan and EA Document in
Gaston County
PROJECT NO: 790 and RJG8A#9617
DUE DATE: 6-18-96
We have reviewed the above subject document dated May 1996 and have the following comments:
1. We have no objections to the need and concept of the proposed action.
2. It looks like all construction activities will result in the direct impact to 16 acres of urban forest land
and the indirect impact to 2 to 4 acres of additional urban type forest land.
3. Since there appears to be some large trees involved, it is hoped that the contractor will make all
attempts to salvage merchantable trees for pulpwood, chips and saw timber whenever possible.
4. We would further hope that the contractor would protect remaining standing trees outside of
construction limits from damage from heavy equipment type of operations.
5. We have no further comments at this time.
pc: Mike Thompson, Warren Boyette- CO
Howard Williams - D12
File
P. O. Box 29581,Raleigh, North Carolina 27626-0581 lI4 An Equal Opportunity Affirmative Action Employer
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•
DIVISION OF ENVIRONMENTAL MANAGEMENT
Air Quality Section
June 17, 1996
MEMORANDUM
To: Melba McGee
Environmental Assessment Section
From: Alan Klimek, Chief dSrl/
Subject: Project No. 96-0790
Environmental Assessment
Engineering Amendment to 201 Facilities Plan
Town of Stanley
Gaston County, North Carolina
The application has been reviewed by the Air Quality Section. The proposed project involves
improvements to the existing wastewater treatment plant as well as a sewer interconnect with
the town of Mt. Holly. Based on the modifications proposed, an air permit will not be
required.
However, if sources of particulate emissions such as a lime silo are installed, an air permit
may be required. In addition, the contractors should take care to comply with open burning
provisions during land clearing. Adequate wetting, reseeding and covering of disturbed areas
should be utilized during earth moving operations to mitigate any adverse impact from
fugitive dust emissions.
Should you require further information in this regard, please advise.
cc: Holly Groce
stanley.spp

State of North Carolina
Department of Environment,
Health and Natural Resources AT:7A
Office of Waste Reduction
JamesnahaB. Hunt, Jrw., , Secretr
ary
C/ 6 F 1 N R
Jonathan B. Howes, Secretary
Gary E. Hunt, Director
June 14, 1996
To: Melba McGee, Legislative and Intergovernmental Affairs Office
Through: David Williams, Program Manager
Pollution Prevention Program
Office of Waste Reduction
From: Lindsay L. Mize, EIT, Envir an ,j y�gineer
Pollution Prevention Progra // /
Office of Waste Reducti
Subject: Comments on Project Number 790, Town of Stanley Wastewater
Treatment Facilities, Stanley, NC, Engineering Amendment to the Town of
Stanley 201 Facilities Plan, May, 1996, Gaston County
The Town of Stanley is proposing to expand its wastewater treatment plant
and collection system as well as to enter into an agreement with the Town of Mount
Holly for treatment of a portion of its waste. The Office of Waste Reduction does not
have any objection to the project as proposed, but would like to offer the following
water conservation information. In the April, 1996 issue of US Water News an article
outlined a water conservation program being conducted by the City of Greensboro,
NC.(article attached) The City of Greensboro was offering a rebate in consumers water
bills if they would install early closing flaps in their toilets. The City of Greensboro is
expecting to reduce its water consumption by 25 million gallons per year. The City of
Greensboro is conducting this program for potable water capacity assurance, but it also
saves this amount being treated in the wastewater treatment facilities.
In promoting water use efficiency the Town of Stanley may wish to consider
offering water conservation information to its residents and industries through rebates
such as Greensboro, fliers in the monthly water bills, public service announcements,
special mailings, etc. The Town of Stanley may also wish to consider adjusting its rate
structure to create an incentive for water conservation for all of its industrial/commercial
users and residents. This would most likely be cheaper in the long run for the public
than the costs treating additional wastewater. On page 4 of the report it states that the
volume of industrial wastewater projected is being reduced due to industrial water reuse.
It is likely that new industrial users of the system could identify opportunities to reduce
water usage as well.
P. O. Box 29569, Raleigh, North Carolina 27626-9569 Win 11 An Equal Opportunity Affirmative Action Employer
Voice 919-715-6500 FAX [phone]
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Melba.McGee
Page Two
June 14, 1996
Also the construction phase of this project should address the following
methods to minimize further the environmental impact of the project:
• Trees, brush, and other materials generated from clearing and grubbing should be
processed to avoid open air incineration or burial in a landfill. Grinding of the
materials for use as mulch, compost, or boiler fuel would be an appropriate option.
• Seeding of disturbed areas during the construction phases for erosion and
sedimentation control could utilize hydro-seeding or compost in place of straw and
asphalt tack. Asphalt tack could pose a threat to water quality, especially in the
event of heavy rainfall before the tack dries. Hydro-seeding and compost are made
from recycled materials, thus helping to provide beneficial end uses for waste
materials and also thereby minimizing their disposal impacts.
• Waste materials (concrete, wood, steel) from the project should be reused or
recycled. A construction & demolition recycling center could assist with this. There
are several operating within North Carolina. For contacts call the Office of Waste
Reduction.
• The project should consider using recycled materials or recycled-content products in
construction. Examples would include crushed concrete sub-base, crumb-rubber for
the asphalt, and recycled plastic fence posts or lumber.
The Office of Waste Reduction would like to offer its free, non-regulatory,
technical assistance to the municipality, existing industries and any new industries that
locate in this area. If the Office Waste Reduction car be of assistance, please call
919/715-6500. Thank-you.

, 4�
North Carolina Department of Cultural Resources
James B.Hunt Jr.,Governor Division of Archives and History
Betty Ray McCain,Secretary Jeffrey J.Crow,Director
June 25, 1996
MEMORANDUM ...,,. '` ry _._,n !rr
,.
i
TO: Reginald R. Sutton
Construction Grants Section 1 .36
Division of Environmental Management -ur'sGUJ_
DEHNR `` t'
Otece4
c U",, AOrfr .. N
FROM: David Brook
Deputy State Historic Preservation Officer
SUBJECT: Engineering Amendment to the town of Stanley
201 Facilities Plan, Gaston County, ER 96-9065
Thank you for providing us the opportunity to review the above project.
We have conducted a search of our maps and files and have located the following
structure of historical or architectural importance within the general area of the
project:
Mount Holly Mill (GS 7). East of North Main Street, north of Dutchman's
Creek, south of Alsace Avenue.
This property was approved for listing in the National Register of Historic Places in
1980 but was not nominated due to the owner's objection. For purposes of
environmental review, it is considered eligible for the National Register and the 401
facilities plan subject to Section 106 of the National Historic Preservation Act.
We need more information to determine the effect of this project on the Mount
Holly Mill. Please send us a letter or plans describing the proposed pump station.
We also need to know if the wastewater interconnector will be above or below
ground.
There are no known archaeological sites within the proposed project area. Based
on our present knowledge of the area, it is unlikely that any archaeological
resources which may be eligible for inclusion in the National Register of Historic
Places will be affected by the project construction.
The above comments are made pursuant to Section 106 of the National Historic
Preservation Act and the Advisory Council on Historic Preservation's Regulations
for Compliance with Section 106 codified at 36 CFR Part 800.
,109 East Jones Street•Raleigh,North Carolina 27601-2807 g4,9

Reginald Sutton
June 25, 1996, Page 2
Thank you for your cooperation and consideration. If you have questions
concerning the above comment, please contact Renee Gledhill-Earley, environmental
review coordinator, at 919/733-4763.
DB:slw
cc: Gaston County Historic Preservation Commission

oteNT OF,.
P United States Department of the Interior
: `�_i• FISH AND WILDLIFE SERVICE
ggca°j Asheville Field Office
160 Zillicoa Street
Asheville, North Carolina 28801
June 19, 1996s .
x - ,�►
uy; , .,E, IS2r
.o 33W ,
Mr. Reginald Sutton
Division of Environmental Management
North Carolina Department of Environment, Health,
and Natural Resources
P.O. Box 29535
Raleigh, North Carolina 27626-0535
Dear Mr. Sutton:
Subject: Proposed amendment to the 201 Facilities Plan for the Town of Stanely, Gaston
County, North Carolina
We received a copy of the subject document on June 3, 1996. The following comments are
provided in accordance with the provisions of the Fish and Wildlife Coordination Act, as
amended (16 U.S.C. 661-667e), and Section 7 of the Endangered Species Act of 1973, as
amended (16 U.S.C. 1531-1543) (Act).
According to the environmental assessment, this project will involve the construction of a new
wastewater collection and pumping system along South Stanley Creek and Dutchmans Creek in
northeastern Gaston County. The project will connect the Town of Stanley's sewer system with
the City of Mount Holly's sewer system. The wastewater will be treated and discharged at the
Mount Holly Waste Water Treatment Plant located on the Catawba River in Gaston County. The
project will also involve the construction of a new 2.7-million-gallon-a-day pump station located
adjacent to Alsace Mill between Alsace Street and Dutchman's Creek in Mount Holly, 27,300
feet of gravity sewer from four existing pump stations to the proposed Alsace Mill pump station,
and 1,400 feet of force main paralleling the southeastern portion of the gravity sewer. Four
existing pump stations will be abandoned. The project will impact 25 forested upland acres and
one wetland area of less than 1 acre in size. Construction of the interconnector will require two
new crossings of Dutchman's Creek. The purpose of the project is serve industrial and
residential areas along Highway 27 east of Stanley. The proposed facilities will serve projected
future needs for both the Town of Stanley and the City of Mount Holly.

•
The U.S. Fish and Wildlife Service (Service) reviewed and provided comments on the Town of
Stanley's 201 Facilities Plan on July 1, 1994. At that time, we indicated that we had no major
concerns with the original 201 Plan. Regarding the proposed amendment, the Service has no
objection to the construction of the new Alsace pump station since it will be located in a
previously disturbed area adjacent to the Alsace Mill. Additionally, the Service appreciates the
efforts taken to avoid a majority of the delineated jurisdictional wetlands located along South
Stanley Creek. The Service's primary concerns with the proposed amendment include (1) the
two new crossings over Dutchman's Creek; (2)the maintenance of a forested riparian buffer
along streams; and (3) the elimination of a portion of a population of Bigleaf magnolia
(Magnolia macrophylla), a State-designated significantly rare species. The environmental
assessment was not clear as to what mitigative measures were to be employed associated with the
stream crossings nor did it specify the extent of vegetated buffer to be preserved between the new
sewer lines and area streams.
The Service offers the following recommendations in order to minimize impacts to local stream
resources:
(1) Stream crossings should be constructed perpendicular to streams in order to reduce
impacts to stream banks and riparian vegetation. Additionally, stream crossings
should be avoided in areas of high-quality aquatic habitats such as riffles and reaches
with extensive aquatic vegetation.
(2) All pipeline crossings should be buried below the natural streambed, suspended from
bridges, or elevated on pilings in order to avoid creating barriers to fish movement
and debris jams.
(3) Efforts should be taken to ensure that no wet concrete makes contact with stream
water in order to avoid a possible fish kill.
(4) Natural materials should be used as much as possible to restore stream banks at
crossings. We do not object to the use of riprap on the stream bank below the high
water mark, but we prefer that vegetation be used for stabilization above high water.
(5) Where a pipeline is parallel to a stream, a 50-foot vegetated buffer zone should be
preserved between the construction corridor and the stream bank in order to protect
the roots of bank-stabilizing riparian trees, allow for storm-water infiltration and
deposition of eroded soil and pollutants, and preserve a travel corridor for wildlife.
Where existing development or steep contours allow less than a 50-foot buffer
alongside streams, additional sediment and erosion control measures should be
employed.
(6) Areas cleared for construction should be revegetated with an annual ground cover
within 15 days of any ground-disturbing activities. We prefer a seed-as-you-go
strategy rather than allowing large areas of soil to remain bare for extended periods.
Use of an annual rather than a perennial ground cover in wetlands will interfere less

with the eventual reestablishment of native vegetation. After completion of
construction, wetland areas should be replanted with native perennial plant species.
Regarding the population of Magnolia macrophylla to be impacted, the Service encourages, if
feasible, consideration of rerouting the pipeline in this area to avoid this population. We have
reviewed our records and believe the project will have "no effect" on federally listed species. In
view of this, the Service believes the requirements under Section 7(c) of the Act are fulfilled.
However, obligations under Section 7 of the Act must be reconsidered if: (1) new information
reveals impacts of this identified action that may affect listed species or critical habitat in a
manner not previously considered, (2)this action is subsequently modified in a manner that was
not considered in this review, or (3) a new species is listed or critical habitat is determined that
may be affected by the identified action.
Please do not hesitate to contact Ms. Janice Nicholls of our staff at 704/258-3939, Ext. 227, if
you have any questions regarding our comments. We have assigned our Log No. 4-2-94-083 to
this project. Please refer to this number in all future correspondence directed to us concerning
this matter.
Sincerely,
Brian P. Cole
Field Supervisor
cc:
Mr. Bob Johnson, U.S. Army Corps of Engineers, Regulatory Field Office, 151 Patton Avenue,
Room 143, Asheville,NC 28801-5006

State of North Carolina
Department of Environment,
Health and Natural Resources •
Division of Water Quality Alf
James B. Hunt, Jrw., , Secrnor
etes C E I -I N F .
Jonathan B. Howes, Secretary
A. Preston Howard, Jr., P.E., Director
N.C. DEPT. OF
September 18, 1996 ENVIRONMENT, HEALTH,
CP NATURAL RESOURCES
SEP 19 1996
MEMORANDUM DIVISION OF ENVIRONMENTAL MANAGEMENT
MOORESVILLE REGIONAL OFFICE
TO: Rex Gleason, Water Quality Regional Supervisor
Mooresville Regional Office
ATTN: Mike Parker
FROM: Ryan Scruggs, Project Manager S
Facilities Evaluation Unit ��
SUBJECT: Town of Stanley
Engineering Amendment to the 201 Facilities Plan
Project No. E-SBF-T-95-0R20
6, ' oA) Co .
Transmitted herewith is one copy of the above subject revised Engineering Amendment
for your files.
RMS/kc
Attachment
cc: FEU
SRF
Construction Grants&Loans Section 4r% FAX [phone]
P.O. Box 29579,Raleigh,North Carolina 27626-0579 II1II4IIYIJ
An Equal Opportunity/Affirmative Action Employer
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L
RECEJIMM
,SEP 17 1996
CONSTRUCTION GRANTS& LOANS SECTION
DE#A-EHNR
N.C. DEPT. OF
ENVIRONMENT. HE.\LTH,
e, NATURAL RE`•)U 'C'FS
SEP 19 1996
ENGINEERING AMENDMENT
TO THE DIVISION OF ENVIRONMENTAL MANAGEMENT
MOORESVILLE REMORAS. OFFICE
TOWN OF STANLEY
201 FACILITIES PLAN
prepared for
TOWN OF STANLEY
114 South Main Street
Stanley, North Carolina 28164
By
W. K. DICKSON & COMPANY, INC.
1924 Cleveland Avenue
Charlotte, North Carolina 28203
MAY 1996
(Revised August 1996)
(Revised September 9, 1996)
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jrf ff+f I if 1 i 04 N000.;`
9-/ . -9c

•
WK
DICKSON
September 16, 1996
Mr. Jay B. Lucas, P.E., Supervisor
Facilities Evaluation Unit
itif N.C. DEHNR, Division of Environmental Management
Engineers P. O. Box 29579
Planners Raleigh, North Carolina 27626-0579
Surveyors
Re: Town of Stanley
Revised Engineering Amendment to the
201 Facilities Plan, Project No. E-SBF-T-95-0R20
WKD # 96451.10 I
Dear Mr. Lucas:
The following includes revisions to the 201 Facilities Plan (dated May 1996,
Revised August 1996) prepared for the Town of Stanley. Changes are shown in
bold Italic print. The selected 201 alternative recommended expanding the
Town's wastewater treatment plant to 1.0 MGD to handle future capacity needs.
The Town of Stanley and the City of Mount Holly in March 1996 entered into an
intermunicipal agreement for Mount Holly to treat a portion of Stanley's
wastewater at Mount Holly's treatment plant on the Catawba River. This will
allow Stanley to reduce flow at their treatment facility and not expand the
capacity of the plant.
The agreement calls for Stanley to purchase 0.500 MGD of treatment capacity at
the Mount Holly facility and construct a sewer interconnect between the two
sewer systems to convey wastewater from Stanley to Mount Holly for treatment.
The Town will also make several needed improvements at their wastewater
treatment plant as a part of this engineering amendment.
201 AMENDMENT CHANGES
The following 201 Amendment changes, dated May 1996, are included for the
Town of Stanley:
1924 Cleveland Avenue Other Offices: Atlanta,GA
Charlotte,North Carolina 28203 H Hickor orle,NC
Hick NC
704 334-5348 Raleigh.NC
FAX [phone] Columbia,SC
2

Wastewater Treatment Plant (WVVTP):
1. NPDES Permit Flow. The Stanley Wastewater Treatment Plant flow
capacity will remain 0.500 million gallons per day (MGD). The following
improvements are planned and are included in the 201 Amendment:
2. Aerobic Digester. A new aerobic digester (64 ft diameter with an 18 ft.
side water depth) will be provided to replace the existing unit. The
digester will provide stabilization and storage of sludge for 90 (plus) days
at a 2% solids. Additional storage can be done in the existing sludge
holding basin.
3. Aeration & Mixing. Replace the aeration basin aerators with two 25-hp
floating aerators. Move the two existing 20-hp aerators to the sludge
holding basin and provide four 20-hp flow directional mixers in the sludge
holding basin. Any three of the 20-hp mixers will provide the mixing
requirements with the fourth mixer used as backup. One of the existing
20-hp aerators will be available for backup should one of the 25-hp
floating aerator be out of service.
4. Dechlorination Facilities. A sulfur Dioxide gaseous dechlorination system
will be provide for the 0.5 MGD treatment capacity. Two 100 lbs/day
feeders with accessory equipment and alarms will be provided. Piping
and valve modifications will be made to the existing chlorine contact basin
to segregate the basin into two separate basins.
5. Standby Power. Standby power for the plant, excluding auxiliary lighting
or sludge treatment facilities will be added as required for dischargers to
WS waters.
6. Influent Screening and Flow Measuring. Replacement equipment for the
mechanical bar screen and flow measurement of the influent flows will be
provided.
7. Mechanical Bar Screening. Replace the existing mechanical bar screen
with a new unit.
The VWVTP upgrade will include modifications where possible to resolve short-
circuiting problems in the final clarifiers identified by DEM staff.
Estimated project cost of making the WWTP improvements is $1,312,500 (see
Table 1). The estimate includes cost of construction, engineering and project
contingencies. The estimate of engineering services also includes cost to date
by the Town ($216,500) to expand the existing treatment plant.
3

•
TABLE 1
WASTEWATER TREATMENT PLANT PROJECT COST
Construction:
Mechanical Bar Screening ,t0,00u
Influent Flow Measuring 8,000
• Site Work 135,0CC
Aerators 35,000
Scum Removal Pumping 16,000
Sludge Meters 8,000
Aerobic Digester& Sludge Handling 475,000
Chlorination/Dechlorination 130,000
Structure Repairs 50,000
Standby Power 50.000
Total Construction $947.00r.
Engineering Services:
Design & Survey Mapping 50,00L
• Construction Services 4,000
Engineering Services for 1.0 MGD Expansion 216.500
Total Engineering Services $270,50n
Project Contingencies: __$95 QQ
Total Project Cost: $1,312.501)
Mount Holly/Stanley Sewer Interconnect:
• A new connecting outfall line is to be built between the Town of Stanley (Towii,
and the,pity of Mount Holly{City)to convey pportion of the Town's wastewat€
to the City's treatment plant for treatment. The improvements will include
sewage pumping station, replacing two existing pumping station in the Cir),
system. The upgrades will be sized for all of the Town's existing and t4v,enty
projected flow plus existing and projected flows tributary to the new outfall in tn.
'Mount Ficillisystem:ThetOwn has entered into an ab'reefrient Witsft-the'Cv ft)
purchase 0.5 MGD of treatment capacity at the City's 4.0 MGD treatment plar
located east of Mount Holly on the Catawba River. A copy of the agree mere
,
between the two municipalities is attached to the engineering amendment
agreement has provisions for future additional treatment capacity purchase by
the Town upon approval of both parties.

REVISED PROJECT DESCRIPTION
The Town operates a 500,000 gallon per day (GPD) wastewater treatment plant
(WWTP) located at the end of Lola Street northwest of the Town. The treatment
plant is an activated sludge process, discharging treated effluent to Mauney
Creek.
Stanley will continue to treat most of its wastewater at the Town's treatment
plant. The sewer interconnect will be built to the industrial areas along Highway
27 east of Stanley and will serve both industrial and residential areas. The
outfall will be built to accommodate future extensions to pick up other areas of
the Town's service area in the future. Long range all of the Town's wastewater
could be discharged to the Mount Holly system with the Town's existing
treatment plant retired or eliminated. It is the Town's plan to continue to operate
the existing plant for some time into the future until either it is feasible to treat
their wastewater at Mount Holly or future discharge limits to Mauney Creek make
the discharge no longer feasible.
Stanley's flow projections for the twenty-year planning period are revised to
0.860 MGD from a previously identified need of 1.148 MGD. This change
reflects changes in industrial discharges effected by pretreatment and reuse of
process water and a reduction in planned residential growth in areas adjacent to
the Town's service area. This treatment capacity need can be met with the
existing treatment capacity (0.5 MGD) and the purchased treatment capacity
from Mount Holly (0.5 MGD). Table 2 shows flow projection changes for the
Town. Table 2a shows how the projected Stanley flows will be split between the
Stanley WWTP and the sewer interconnect line to Mount Holly.
TABLE 2
TOWN OF STANLEY
FLOW PROJECTIONS
Engineering
201 Amendment
Flows Changes Flows
(GPD) (GPD) (GPD)
a). Existing Residential 242,900 242,900
b). Existing Commercial 63,500 63,500
c). Existing Industrial 109,700 (40,000) 69,700
d). Non-Excessive Ill 191,900 10,400 202,300
e). Residential Growth 96,040 96,040
f). Commercial Growth 20,580 20,580
g). Unspecified Industrial Growth 46,110 (8,510) 37,600
5

TABLE 2 (Continued)
h). Specified Industrial Growth 280,000 (180,000) 100,000
I). Planned Residential Growth 97,650 (70,000) 27.650
Total: 1,148,380 (288,110) 860,270
TABLE 2a
FLOW SPLITS for
STANLEY FLOW PROJECTIONS
(Revised)
A. STANLEY WWTP FLOWS:
CURRENT 20-YR
FLOWS DESIGN TOTAL
(GPD) (GPD) (GPD)
Residential 206,900 31,500 238,400
Commercial 58,970 1,830 60,800
Industrial 21,100 28,700 49,800
Non-Excessive Ill 57.900 96,400 145.000
Total: 344,870 149,130 494,000
B. SEWER LINE TO MOUNT HOLLY FLOWS:
CURRENT 20-YR
FLOWS DESIGN TOTAL
(GPD) (GPD) (GPD)
Residential 36,000 92,190 128,190
Commercial 4,530 18,750 23,280
Industrial 48,600 108,900 157,500
Non-Excessive Ill 18,000 39,300 57.300
Total: 107,130 259,140 366,270
6

TABLE 2a (Continued)
C. TOTAL FLOWS:
CURRENT 20-YR
FLOWS DESIGN TOTAL
(GPD) (GPD) (GPD)
Residential 242,900 123,690 366,590
Commercial 63,500 20,580 84,080
Industrial 69,700 137,600 207,300
Non-Excessive I/I 75,900 126.400 202.300
Total: 452,000 408,270 860,270
The flow will be split in such a manner as to not overload the Stanley WWTP. A
service area map in included defining service areas for the Stanley and Mount
Holly WVVTP's. Flow projections for the Stanley WWTP show a need for 0.494
MGD of treatment capacity after interconnecting with the Mount Holly system.
The total 20-year projected flow to the Mount Holly WWTP, including the 0.5
MGD of treatment capacity for Stanley, is 5.9 MGD. Flows at the Mount Holly
WtNTP currently average 2.7 MGD. Current treatment capacity is 4.0 MGD.
The interconnect outfall will be sized for the Town of Stanley's total projected
flow for a 20-year design. The interconnect sewers are sized for the total
average daily flow (ADF) so the pipe will flow approximately 1/2 full at the design
loading. The sewer sizing was evaluated to verify the sizing will carry the Peak
flow (with a 2.5 peaking factor). The sizing criteria was reviewed with the Town
of Stanley and the City of Mount Holly. The new outfall and pumping station will
include the following. A map is included identifying force mains, sewers, meter
vault, location, diameter and length of each line segment:
TABLE 3
SEWER INTERCONNECT
BASIS OF DESIGN
(Revised)
LINE OUTFALL DESIGN % of DEPTH
SEGMENT SIZE, LENGTH AVG. DAILY FLOW @ PEAK FLOW
6 - 5 8" 3,931 LF 0.124 MGD 62%
3 - 4 18" 14,216 LF 0.973 MGD 92%
2 - 3 15" 4,628 LF 1.197 MGD 92%
E2 - 2 15" 550 LF 0.426 MGD 66%
2 - 1 27" 4,163 LF 1.860 MGD 73%
7

•
I
STANLEY Y�WTPOS
.1 I
■
(;Vega illTOWN OF STANLEY
� O
\v i S►"' STANLEY SERVICE AREA 16
1 Illt I \ .
omill_ STANLEY SERVICE AREA
�� DIRECTED TO SEWER INTERCONNECT I ' %
�� EXISTING r t)����„ SANITARY SEWER �� 17:11:
7_, ,)/`�� \ ' EXISTING PUMP = Is
EXISTING PUMP �\ SiA�ION y \
STATION " - ,' ` ABM,ON
(ABANDON) SANTAI3'I'—� \ j jl ��
SEWER �\ j�jj<e:: / o
j/ -/ �O j�j�/A
STANLEY SERVICE AREA / %,,'j/� ,�j�� �■►' / ,/
MT. HOLLY SERVICE AREA ° �- ;* r ,•0 %i/i i f /j�/
Oj%!�a/ / o �� .y///
I I DIRECTED TO SEWERREA ; %/%j%�%O/�/ �j / /�/,%'
r,
L—J SEVER INTERCONNECT r V%%i:;;;;iii/ �i 74 //%%!l
-
///IP •.;Y%M2/44�,i ii/�j�i rr
i.; -' j�% ii//7.i �iA47 7STATION
O — ' `Y s 4%,:,jj%•I'-ri: k
,ip
�/0 re./ "'s'ij PROPOSED
�,„%%%/r�/ ,/,�%' SANITARY SEVER AND
'� /// /� j / r'� FORCEMAIN
'/�z - j , VVV
� ��� // ,,�,j/, ' -ROP. 12' PARALLEL FORCE MAIN
/1.7 riiii.1/);,/i j v`//w/'I MT. HOLLY WWTP
J ��` TO/-5 /i//frsr%/i• ',%/
i..-4•wS.lilt• %j//i/i��fir_1 r,
%� • MT. HOLLY SERVICE AREA
01"
CITY OF MT. HOLLY
Ph' WK
`lannersQrs DICKSONICKSOPlann WKD / 96451.10 AUG. 1996
Surveyors SCHEM.DWG

TABLE 3 (Continued)
El - 1A 15" 428 LF 0.398 MGD 53%
1 B - IA 18" 35 LF 0.489 MGD 40%
lA - 1 21" 315 LF 0.888 MGD 48%
1 - DCPS 30" 128 LF 2.745 MGD 56%
Peak Flows are 2.5 times ADF
LINE FORCE MAIN
SEGMENT SIZE LENGTH PUMPING RATE
DCPS - El 18" 850 LF 4,150 GPM
El - Fl 12" 6,950 LF 4,150 GPM
14" 7,750 LF (Existing FM)
Fl -W AJTP 14" 240 LF (Existing FM) 4,150 GPM
PUMPING STATION: 4,150 GPM @ 103 FT TDH
3 - 120 HP PUMPS
TABLE 4
SEWER INTERCONNECT
PROJECT COST
(Revised)
CONSTRUCTION:
30" Sanitary Sewer (128 LF) 16,300
27" Sanitary Sewer (4,163 LF) 477,700
21" Sanitary Sewer (315 LF) 28,100
18" Sanitary Sewer (14,251 LF) 1,090,200
15" Sanitary Sewer (5,606 LF) 327,700
8" Sanitary Sewer (3,931 LF) 133,700
18" Force Main (850 LF) 32,600
12" Force Main (6,950 LF) 177,600
Sewer Meter 50,000
Dutchman Creek Pump Station 562.000
Total Construction: $2,925,900
Engineering Services:
Design & Survey Mapping 202,800
Construction Services 132.900
Total Engineering Services $335,700
8

TABLE 4 (Continued)
Legal, Administrative & ROW $65,000
Project Contingencies: $145.000
Total Project Cost: $3,471,600
Total estimated project cost of the sewer interconnect is $3.472 million.
Combined with the WWTP improvement project cost ($1.312 million), the
combined cost is $4.784 million. The projects will be funded by a State bond
loan, Gaston County and excess funds available from a Town general obligation
bond (GO Bond). The Town's loan application for $3.0985 million was approved
by the Local Government Commission and the loan offer and acceptance
documents have been sent to the Town. Projected funding is available as
follows:
State Bond Loan $3.0985 million
Gaston County $2.800 million (see note)
Town GO Bond $0.700 million
Note: The County has agreed to fund the project with 10 annual payments
-428e;098fyear) over the next 10-years. Excess funds (over the $4.784 million
projected cost) will be used by the Town to purchase treatment plant capacity at
the Mount Holly WWTP when the plant is expanded. Expansion is projected to
occur within 4 to 6 years.
JUSTIFICATION
The Stanley treatment plant is currently operating at 92% of its rated treatment
capacity. NCDEM regulations require Stanley to increase the capacity to meet
future capacity, detail specific measures to achieve waste flow reductions or
develop alternative plans to reduce flow at the treatment plant. Estimated cost to
expand the treatment plant is $3,006,400. Waste flow reduction is not
achievable in a growing economy. Stanley has chosen to reduce flow at the
treatment plant with an intergovernmental agreement with Mount Holly to treat up
to 0.5 MGD of wastewater. It is advantageous for Stanley to purchase
wastewater treatment capacity from Mount Holly in lieu of expanding their own
facility. It is increasingly uneconomical for the Town to operate its own
wastewater treatment facilities. Consolidation of these activities with the City of
Mount Holly is not only financially sound, but furthers regional concepts of
consolidation of small wastewater discharges into larger regional facilities,
reducing the total number of discharges. The sewer interconnect option offers
the Town the option to purchase additional treatment capacity at Mount Holly in
9

•
TOWN OF STANLEY
PROPOSED
OUTFALL SIZE
8" 0.124 MGD A.D.F.
(3,931 LF)
EXISTING 8" OUTFALL
0 0 EXISTING PUMP STATION
A ♦ TO BE ABANDONED
0
EXISTING PUMP STATION PROPOSED
TO BE ABANDONED
OUTFALL SIZE
18" 0.973 MGD A.D.F.
MASTER SEWER METER (14,216 LF)
EXIST. 15" OUTFALL
PROP. 15" PARALLEL SEWER
0.385 MGD A.D.F.
(4,628 LF)
EXISTING WOODLAWN PUMP STATION
TO BE ABANDONED
�� \ 0 A OUOTD
FALLE SIZE
27" 1.860 MGD A.D.F.
EXIST. 15" 0.426 MGD (4,163 LF)
PROPOSED DUTCHMAN'S
CREEK PUMP STATION
EXIST. 18" SS SEE ENLARGED PLAN
EXISTING DUTCHMAN'S CREEK PUMP STATION
s
TO BE ABANDONED
EXISTING 14" FM
PROP. PARALLEL 12" FM
(6,950 LF)
■
MT. HOLLY WWTP
CITY OF MT. HOLLY
SEWER INTERCONNECT (SCHEMATIC)
WK
EngmnnKs DICKSON E d p 51.10 AUG. 1996
Pla
Surve a

/ l
7 /
� .,-'-' /
(4 163 LF) SS \ \ /
N o\ \ \\ PROPOSED DU9HMAN'S CREEK PUMP STATION (DCPS)
\� al
l \A. \ /
\ \\ \ I I11
��F . PROP. 18" F \
PROP. 3O" SS
\ \ \ 1
\ 0 (128 LF) \ \ ` -N-
\ \ \ \ 'PROP. ) \
\ \ (315 is) \\ \ \
PROP. 8"\ \ \\ \
35 LF) \ \
\
EXISTING 18" SS o &/ P'OP DEPRES-+:p1, SEV \ \
2"D`� 1 .I.P. (TWO -EOUIRg')
\
EXISTING 18" TO BE REMOVED , \ ' I
L�
NI GE /
(428 LF) SS N I
/
PROP. 18" FORCE MAINN -----""
(850 LF)
\I.
, I
EXISTING DUTCHMAN'S CREEK �rrp •
PUMP STATION TO BE ABANDONDED g
Al EXISTING 14" FORCE MAIN TO REMAIN
EAST CHARLOTTE AVE.
NC HWY. 27 ® I F -------- ----_" _
la
CC
la
---------)
N N
PROP. 12" FORCE MAIN
(6.950 LFO) WWTP
x
2=
ENLARGED PLAN
(SEE SEWER INTERCONNECT SCHEMATIC)
V► W K
Engineers DICKSON WKD r 96451.10 AUG. 1996
Surveyors SCHEM.DWG
Survey

the future. This option is a hedge against future treatment regulation changes
which are increasingly difficult for small treatment operations like Stanley to
comply. The estimated project cost of the sewer interconnect with Mount Holly,
including outfalls and pumping station is $3,471,600.
The sewer interconnect offers the additional advantage of eliminating four
existing sewage pumping stations, two in the Stanley system and two in the
Mount Holly system. The wastewater in Stanley is currently pumped two to three
times before reaching the treatment plant. With the sewer interconnect the
wastewater will be handled by gravity. The sewer interconnect will reduce the
amount of wastewater to be handled at the Town's West Chestnut Street
pumping station which now is a major pumping station in the system and
experiences overloads during peak flow periods. In the Mount Holly system, the
interconnect project will replace two older pumping stations in their system with
one larger pumping station.
COST EFFECTIVENESS:
Stanley WWTP. Treatment at the Stanley WWTP would require expansion of
the treatment plant and advanced level of treatment required to discharge at the
larger flows into a low flow stream.
Sewer Interconnect. Three sewer interconnect options were evaluated. All three
options conveys wastewater by gravity sewer between Stanley near Highway 27
to the Mount Holly system. Option I requires two new pumping stations in the
Mount Holly system to replace two older stations. The existing Woodlawn
Avenue pump station and Dutchman Creek pump station would be replaced.
Option II requires construction of a new pump station near the existing Dutchman
Creek pump station near NC-273 Bypass bridge. The existing Woodlawn
Avenue pump station would be rebuilt with larger pumps and a new force main
across Dutchman Creek to a new gravity sewer. The existing Dutchman Creek
pump station would be abandoned.
Option III requires a new pump station on the northeast bank of Dutchman Creek
near Alsace Mill. The existing Woodlawn Avenue pump station and Dutchman
Creek pump station would be abandoned. Projected construction cost of the
three options are:
Option I $2,930,700
Option II $2,993,400
Option III $2,925,900
10

WK September 16, 1996
DICKSON
Mr. Jay B. Lucas, P.E., Supervisor IC
Facilities Evaluation Unit
N.C. DEHNR, Division of Water Quality RECEIN
Falk P. O. Box 29579
Raleigh, North Carolina 27626-0579 SAP
17 t996
Engineers Re: Town of Stanley Engineering Amendment 5� �ZIG�1 am
MIT VAS
,`"" 1�
Planners
Sun�eyors to 201 Facilities Plan, Project No. E-SBF-T-95-OR2a0 pESIC�WAG'
a. =
WKD # 96451.10 I Y
Dear Mr. Lucas:
The enclosed "Revised" Engineering Amendment (dated September 9, 1996)
includes changes relating to technical review comments received on August
30, 1996. All of the comments are covered in the revised amendment as
follows:
41
1. Pumping design notes are revised per comments in item # 1 (see
design notes).
2. The present worth calculations are revised per comments in item # 2.
3. User fee calculations are attached. The estimated user cost of
$24.05 reflects the start-up cost when the Town must provide
their share of cost for the future Mount Holly WWTP expansion
in FY 2002/2003. This user cost was calculated using the
information provided on page 8.
4. The service area map is revised to reflect the information
requested in item # 4. Table 2a is revised to show current and
20-year flow estimates for the interconnect service area.
5. The source of the 123,800 gpd 20-year design flow into line
segment 6-5 is the residential and industrial development to the
west of Highway 27 in the Stanley service area to be served by
the sewer interconnect.
6. The WWTP project cost on page 8 has been corrected to agree
with Table 1.
1924 Cleveland Avenue Other Offices: Atlanta,GA
Charlotte, North Carolina 28203 Asheville NC
Hickory,NC
704 334-5348 Raleigh,NC
FAX [phone] Columbia,SC

Mr. Jay B. Lucas, P.E.
September 16, 1996
Page two
7. Refer to the revised Outfall Basis of Design (pages 5 of 24 and 6 of
24) for response to comments 7a through 7d. Response to
Comment 7e follows; The 103% peak ratio for line segment 3-4
reflects a ratio of the projected peak flow to full pipe capacity for a
illiP 18" sewer at a 0.12% slope. The projected peak Flow (2.431 MGD)
divided by the full pipe capacity (2.361 MGD) equals a peak ratio of
Engineers
Planners 103%.
Sunveuors
8. Table 2a is revised to show current and 20-year design flows.
Calculations are enclosed.
9. Table 2a shows the current and projected (20-year) flows for the
Stanley service area. The flows in Table 2a (the Stanley service area)
are included in the outfall basis of design as flow from Stanley ("STL"
= 860,270 gpd). The "STL" is the Stanley flow component for the
sewer interconnect design criteria.
10. The line segment 2-3 is changed from 12-inch diameter to a 15-
inch to handle the peak flow. Design calculations are enclosed.
11. A public hearing is scheduled for September 26, 1996. A copy
of the notice is enclosed.
12. A public hearing transcript will be sent along with the affidavit of
publication.
13. A copy of the Gaston County/Stanley interlocal sewer interconnect
agreement will be provided when available.
14. All progress payments and bidding of the sewer interconnect and
the WWTP will be handled as directed.
15. Environmental Assessment comments were sent directly to Mr.
Reginald R. Sutton on September 12, 1996.
Please advise if there are any questions.
Sincerely,
W. K. DICKSON & CO., INC.
M. L. Wolfe

Option III was found to have the least present worth cost of all three options.
The present worth analysis were made using a discount rate of 7.75% and
associated compound interest factors.
TABLE 5
PRESENT WORTH ANALYSIS
OF OPTIONS
(Revised)
OPTION I OPTION II OPTION III
Construction $2,930,700 $2,993,400 $2,925,900
Engineering 335,700 335,700 335,700
Legal, Admin. & R/W 65,000 65,000 65,000
Project Contingencies 145.000 145,000 145.000
Total Project Cost: $3,476,400 $3,539,100 $3,471,600
Annual Operating Cost:
Pumping Station $53,800 $33,900 $32,400
Pipe Lines 8.500 8.500 8.500
Total: $62,300 $42,400 $40,900
Present Worth ...
of Annual Cost $623,700 $424,500 $409,500
Less Present Worth of Salvage Value ...
Pipelines (60%) ($320,500) ($329,000) ($319,800)
Pumping Sta (50%) ($63,400) ($63,400) ($63,400)
Net Present Worth $3,716,200 $3,571,200 $3,497,900
Both the no-action and Stanley WWTP expansion alternatives were rejected for
economic reasons and treatment capacity needs. Option III was selected as the
sewer interconnect alternative for economic reasons. Option III is less expensive
to build and operating one pumping station require less maintenance and
operation cost over Options I and II.
USER FEES
Sewer revenue needs upon initial start-up will be $917,400 per year or $76,450
per month. Currently, 35 percent of the Town's sewer revenues come from its
residential customers. Assuming this pattern continues, the monthly sewer
revenues which must be generated from residential customers would be:
11

$76,450/month x 35% = $26,663/month
Based on current population projections, there should be approximately 1,060
residential accounts at start-up. Monthly sewer cost for a residential user would
be:
$26,663/month / 1,060 customers = $25.24/month
The Town's sewer user charge for FY 1996/1997 is $7.50 for the first 3,000
gallons plus $3.50 for each additional thousand gallons of usage. Therefore, the
current sewer user charge for a residential customer using 5,000 gallons per
month is $14.50 per month. When the Town must provide their share of the cost
for the future Mount Holly WWTP expansion in FY 2002/2003, residential sewer
user fees (for 5,000 gallons of usage) are projected to increase to $24.05 per
month. This rate projection reflects an average annual increase in revenue
needs of 3% for the period plus increased cost for the WWTP expansion debt
payments and Mount Holly user charges for treating the Town's wastewater.
The anticipated schedule for the Mount Holly WWTP expansion start-up is FY
2002/2003.
ENVIRONMENTAL CORRIDOR
An Environmental Assessment, prepared by Robert J. Goldstein &Associates,
Inc., is attached to the end of this report.
INTERMUNICIPAL AGREEMENTS
The two municipalities have entered into an intermunicipal agreement for the
sewer interconnect project. A copy of the agreement is attached to the end of
this report. A letter from the Town of Stanley (dated August 20, 1996 from Mr.
Gary E. Parker, Town Manager) is included to explain elements of the
intermunicipal agreement. A copy of Exhibit A, section 4 on page 2, is also
included.
TOWN RESOLUTION A copy of the Resolution is attached.
12

RESOLUTION CONCERNING AMENDMENT OF
201 FACILITIES PLAN
TOWN OF STANLEY
WHEREAS, The Town of Stanley has cooperated in the conduct of a 201
Facilities planning Study; and
WHEREAS, An engineering Amendment to the Town of Stanley 201 Facilities
Plan has been prepared, dated May 1996.
NOW, THEREFORE, BE IT RESOLVED THAT the Board of Commissioners of
the Town of Stanley endorses the plan amendments as proposed.
This the 1 Q'± day of , 1996.
By:
Gal R. Brot erton, Mayor
c2irk/.(
C/9‘riX,Att (j-•
(Clerk)

MAYOR egallit of $ctaniev TOWN MANAGER
Gail R. Brotherton Gary E. Parker
ESTABLISHED NOVEMBER 14, 1855
COUNCIL << c-� f)Lee"
POLICE CHIEF
Margaret S. Green 7 JtitndLtj J ee Donald R. Davis
Eugene G.Thompson
George T. Moore FIRE CHIEF
C. Deward Bentley M.Anthony Ballard
Claude G.Lutz
August 21, 1996
Mr. Jay B. Lucas , P.E. , Supervisor
Facilities Evaluation Unit
N.C. DEHNR, Division of Environmental Management
P.O. Box 29579
Raleigh, North Carolina 27626-0579
Re: Town of Stanley Engineering Amendment
to 201 Facilities Plan
Project No. E-SBF-T-95-0R20
Dear Mr. Lucas :
I am writing in reference to the June 28, 1996 review
comments to the Engineering Amendment prepared by W. K. Dickson.
Item 16 evokes several issues relative to the agreement between
the Town of Stanley and The City of Mount Holly which I wish to
explain.
The Town and the City have an agreement whereby the Town
will provide 100% of the financing of the interconnect project
and the City will prepare the plans and specifications and take
the lead to construct the interconnect facilities . This
arrangement was made with the realization that the majority of
the facilities will be located within the City' s service area and
the Town had prior arrangements for a State Loan through the
Construction Grants and Loans (CG&L) office. The Town has sole
responsibility for financing the project and through the
intermunicipal agreement will retain ownership of the outfall
until the State Loan is repaid.
Section 13 , on page 5 of the agreement , includes provision
for the Town to purchase 500,000 gallons per day of capacity in
the expanded capacity of the City' s WWTP. The agreement for
200,000 gpd of treatment capacity applies only until the City' s
plant is expanded or until the Town requests additional treatment
capacity at the Mount Holly facility.
We are aware the overall project costs included in the
intermunicipal agreement are estimates of probable cost and are
subject to change until the project is bid and construction
contracts are executed. The latest estimates of project costs ,
included in the August 1996 revisions , are $3. 417 million for the
sewer interconnect and S1. 323 million for the proposed
improvements at the Town' s wastewater treatment plant .
P.O.BOX 279.114 S. MAIN ST.•STANLEY, N.C.28164.704-263-4779•FAX [phone]

I will forward a draft copy of the interlocal sewer
interconnect agreement with Gaston County as requested. We will
send a final copy after the County completes their budget
planning work.
We feel the intermunicipal agreement addresses the comments
in your June 28, 1996 letter and does not require revision by the
two municipalities . The Town also gave the CG&L office draft
copies of the agreement for review prior to adoption by the
Stanley and Mount Holly Boards . The CG&L office made no comments
at that time. Therefore, the two municipalities proceeded with
adopting the agreement with the understanding the CG&L office was
in agreement with the content of the agreement . Please let me
know if these comments sufficiently answer your questions .
Sincerely,
TOWN OF STANLEY
(:]; 'e r,t•-.‘——..__
Gary / Parker ,
Town anager
cc: Mr. Phillip G. Ponder , Jr . , City Manager
GEP/ic

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ENVIRONMENTAL ASSESSMENT
STANLEY to MOUNT HOLLY
WASTEWATER INTERCONNECTOR
GASTON COUNTY, NORTH CAROLINA
RJG&A Project No. 9617
16 MAY 1996
Report To:
Mr. Cecil Madden
N.C. Division of Environmental Management
Construction Grants Section -- P.O. Box 29535
Raleigh, North Carolina 27626
and
W.K. Dickson & Co., Inc.
1924 Cleveland Avenue
Charlotte, North Carolina 28203
[phone]
Robert J. Goldstein & Associates, Inc.
ENVIRONMENTAL CONSULTANTS
8480 Garvey Drive
Raleigh, North Carolina 27604-3175
Tel [phone]
Fax [phone]

•
TABLE OF CONTENTS
1.0. PROPOSED PROJECT 1
2.0. PURPOSE AND NEED FOR THE PROJECT 1
3.0. EXISTING ENVIRONMENT 1
3.1. Geology and Soils. 1
3.2. Existing Land Use. 2
3.3. Water Resources. 2
3.4. Jurisdictional Wetlands. 2
3.5. Fish and Aquatic Habitats 3
3.6. Wildlife and Terrestrial Habitats 3
4.0. ALTERNATIVES ANALYSIS 3
4.1. No-Action Alternative. 3
4.2. Stanley WWTP. 4
4.3. Stanley to Mount Holly Interconnector 4
4.4. Selection of the Preferred Alternative. 4
5.0. ENVIRONMENTAL CONSEQUENCES 5
5.1. Land Use Changes 5
5.2. Prime and Unique Farmland 5
5.3. Public, Scenic, and Recreational Lands 5
5.4. Archaeological and Historical Resources 6
5.5. Air Quality 6
5.6. Noise Levels 6
5.7. Groundwater Resources 6
5.8. Surface Water Resources 6
5.9. Introduction of Toxic Substances 7
5.10. Eutrophication of Receiving Waters 7
5.11. Jurisdictional Wetlands 7
5.12. Fish and Aquatic Habitats 8
5.13. Wildlife and Terrestrial Habitats 8
5.14. Rare and Protected Species. 8
6.0. MITIGATIVE MEASURES 9
7.0. LITERATURE CITED 10

TABLES AND FIGURES
Table 1. Land Use and Habitat Types in the Project Construction Corridor. 11
Table 2. Rare and Protected Species Known from Gaston County 12
Figure 1. Stanley to Mount Holly Wastewater Interconnector,
Project Location Map. 13
Figure 2a. Project Corridor and Jurisdictional Wetlands 14
Figure 2b. Project Corridor and Jurisdictional Wetlands. 15
Figure 2c. Project Corridor and Jurisdictional Wetlands 16
Figure 2d. Project Corridor and Jurisdictional Wetlands. 1 7

•
1.0. PROPOSED PROJECT.
The Town of Stanley proposes to construct a wastewater collection and pumping
system along South Stanley Creek and Dutchmans Creek in northeastern Gaston County,
North Carolina (Figure 1). The project will connect the Stanley sewer system with the Mount
Holly system, and the wastewater will be treated and discharged at the Mount Holly WWTP
on the Catawba River.
The proposed facilities include a 2.7 MGD pump station located adjacent to Alsace Mill
between Alsace Street and Dutchmans Creek in Mount Holly, 27,300 feet of gravity sewer
from four existing pump stations to the proposed Alsace Mill pump station, and 1,400 feet
of force main paralleling the lowermost (southeastern) portion of the gravity sewer. The
existing pump stations (Dutchmans Creek, Woodlawn Avenue, Twin Brooks Drive, and
Jackson Park) will be abandoned. The proposed force main will discharge to an existing force
main at the intersection of NC-27 and NC-273 Bypass (Figures 2a-d).
2.0. PURPOSE AND NEED FOR THE PROJECT.
The Town of Stanley wishes to direct industrial, commercial, and residential
development along NC-27 southeast of town. The existing Stanley WWTP (0.5 MGD) on
Mauney Creek is in a separate drainage basin and would require significant pumping costs.
Future expansion of Stanley's WWTP capacity is constrained by the high cost of treatment
required by the state to discharge into a small stream.
Stanley purchased an agreement from Mount Holly to provide 0.5 MGD of wastewater
treatment at Mount Holly's 4.0 MGD WWTP on the Catawba River. The Mount Holly WWTP
is better suited for accommodating future expansion than the Stanley WWTP.
The project will also serve western Mount Holly and allow both municipalities to
provide sewer service to the extraterritorial land between them. The project will ultimately
accommodate a wastewater flow of 2.7 MGD, provided that sufficient WWTP capacity is
made available.
3.0. EXISTING ENVIRONMENT.
3.1. Geology and Soils.
The project area is in the Charlotte Belt of the Piedmont physiographic province, with
a prevalence of metamorphosed quartz diorite, granitic rock, and felsic metavolcanic rock
(N.C. Division of Land Resources, 1985). Elevations range from 740 feet above mean sea
level at the Jackson Park pump station southeast of Stanley to 580 feet on Dutchmans Creek
in Mount Holly.
The prevalent soils are Chewacla loam, Helena sandy loam, Winnsboro loam, Wilkes
loam, Gaston sandy clay loam, and Pacolet sandy loam (Woody, 1989).
1

3.2. Existing Land Use.
The proposed Alsace Mill pump station will be located above the 100-year flood
elevation in a grassed area adjacent to Alsace Mill. Of the 27,300 feet of proposed sewerline
corridor, 17% is forest edge adjacent to existing dirt roads or utility lines, 53% is unbroken
forest, 16% is-shrub and sapling thicket, 13% is paved or grassed, and 1 % comprises stream
crossings. Habitat types are described in detail in section 3.6 and Table 1.
The proposed wastewater service area beyond the Mount Holly city limits are sparsely
developed.
3.3. Water Resources.
Surface waters include Dutchmans Creek, its tributary South Stanley Creek, and an
unnamed tributary of South Stanley Creek,in the Catawba River(Lake Wylie) watershed. The
stream banks are forested along most segments. South Stanley Creek and its tributary have
mixed sand, gravel, cobble, and bedrock substrata, with numerous riffles. Dutchmans Creek
has a flatter gradient and a predominantly sandy bottom, with few riffles. All streams in the
project area are classified WS-IV by the N.C. Division of Environmental Management (DEM).
The WS-IV Critical Area for Lake Wylie begins on Dutchmans Creek immediately upstream of
NC-273 Bypass, which is the downstream end of the project area.
Groundwater aquifers in the project area are classified as MIF(Metaigneous Felsic) and
MII (Metaigneous Intermediate), with average well yields of 18 to 19 gallons per minute
(Daniel & Payne, 1990).
3.4. Jurisdictional Wetlands.
RJG&A ecologists Gerald Pottern and Patrick McMillan delineated jurisdictional
wetlands in the project corridor during April and May, 1996, using the 1987 COE Wetlands
Delineation Manual (Environmental Laboratory, 1987)and supplementary technical criteria for
hydrophytic vegetation, hydric soils, and hydrology indicators.
Twelve jurisdictional wetlands were located along South Stanley Creek upstream of
SR 1923 and its unnamed tributary (Figures 2b-d). The drainage basin area of South Stanley
Creek at the SR 1923 bridge is 4.38 square miles, and the wetlands upstream of this point
are headwater wetlands. No wetlands were encountered along Dutchmans Creek or the lower
portion of South Stanley Creek.
Eleven of the twelve wetlands are forested floodplain depression wetlands, with
canopies containing green ash, river birch, water oak, shagbark hickory, American elm,
sweetgum, sycamore, and red maple. The understory shrubs include saplings of the canopy
species, musclewood, Chinese privet, spicebush, silky dogwood, tag alder, elderberry, black
willow, winterberry, arrowwood, and box elder. Dominant vines and herbs include common
greenbrier, poison ivy, Virginia creeper,blackberry,sedges,soft rush,false nettle,jewelweed,
coneflower, turtlehead, cane, horsetail, sensitive fern, and southern lady fern.
2

The twelfth and lowermost wetland (F) is a marsh created by impoundment of an
intermittent stream for erosion control adjacent to a quarry. It supports shrub and vine
thickets containing tag alder, elderberry, black willow, buttonbush, swamp rose, and
blackberry; and an herb layer of Japanese grass,wingstem,thoroughworts, sedges,soft rush,
arrowhead, cattail, spikerush, and jewelweed.
3.5. Fish and Aquatic Habitats.
Fishes were sampled on 17 April 1996 with a 10-foot long, 3/16-inch mesh seine. The
dominant fish species in South Stanley Creek at SR 1923 were sandbar shiner, redlip shiner,
yellowfin shiner,greenhead shiner, rosyside dace, bluehead chub, striped jumprock, speckled
killifish, redbreast sunfish, and tesselated darter.
Dominant fishes in Dutchmans Creek upstream of Main Street included sandbar shiner,
spottail shiner,fieryblack shiner,whitefin shiner,bluehead chub,largemouth bass,white bass,
bluegill, redbreast sunfish, gizzard shad, Piedmont darter, and seagreen darter.
3.6. Wildlife and Terrestrial Habitats.
Floodplain and upland forested habitats in the project area are categorized below by
the N.C. Natural Heritage Program (NHP) community classification system (Schafale and
Weakley, 1990).
The floodplain forests consist of Levee Forest on well drained sand adjacent to
Dutchmans Creek and the lower half of South Stanley Creek, Bottomland Forest on poorly
drained silty soils behind levees, and Alluvial Forest along smaller streams where no levee has
formed. Dominant canopy trees in floodplain forests include the species listed in floodplain
depression wetlands in section 3.4, plus those less tolerant of prolonged saturation such as
bladdernut, carrionflower, southern sugar maple, and flowering dogwood.
Upland forests consist of Mesic Mixed Hardwood Forest on moist acidic slopes, Basic
Mesic Hardwood Forest on basic or mafic moist slopes, and Dry-Mesic Oak/Hickory Forest on
drier slopes and upland ridges. The mesic forests are dominated by beech, northern red oak,
water oak, southern sugar maple, red maple, sweetgum, tulip poplar, shagbark hickory,
mockernut hickory, silverbell, and bigleaf magnolia. The basic forest supports a greater
abundance and diversity of herbaceous species than does the acidic type. The dry-mesic
forest contains primarily white oak, southern red oak, scarlet oak, sourwood, and various
hickories, and a sparse herb layer.
4.0. ALTERNATIVES ANALYSIS.
4.1. No-Action Alternative.
The no-action alternative would constrain development along NC-27 between Stanley
and Mount Holly to low density uses that can dispose of wastewater through septic systems.
This condition is undesirable for economic reasons, and the high failure rate of such systems.
3

4.2. Stanley WWTP.
Treatment at the Stanley WWTP would require WWTP expansion, excessive pumping
costs, and advanced level of treatment required for discharging large volumes of wastewater
into a stream with very low flow, as discussed in Section 2.0. This option was rejected as the
most expensive build alternative.
4.3. Stanley to Mount Holly Interconnector.
Three Stanley to Mount Holly wastewater interconnector alternatives were evaluated.
All include a new gravity sewer from the Jackson Park pump station southeast of Stanley to
the confluence of Dutchmans Creek and Taylor Creek in Mount Holly, and allow the existing
Dutchmans Creek, Jackson Creek, and Twin Brooks pump stations to be abandoned.
Option I requires construction of two new pump stations; one on the northeast bank
of Dutchmans Creek at its confluence with Taylor Creek, and one on the southwest bank of
Dutchmans Creek 400 feet west of the NC-273 Bypass bridge. The existing Woodlawn
Avenue pump station and Dutchmans Creek pump station would be abandoned.
Option II requires construction of a new pump station on the southwest bank of
Dutchmans Creek 400 feet west of the NC-273 Bypass bridge. The existing Woodlawn
Avenue pump station would be retained, and a new force main built across Dutchmaos Creek
connecting it to the new gravity sewer along the northeast bank. The existing Dutchmans
Creek pump station would be abandoned.
Option Ill requires construction of a new pump station on the northeast bank of
Dutchmans Creek near Alsace Mill. The existing Woodlawn Avenue pump station and
Dutchmans Creek pump station would be abandoned.
A gravity sewer alignment adjacent to the existing sewer along the southwest bank
of Dutchmans Creek was considered, but determined impractical due to steep slopes, bedrock,
and the greater trench depth required.
4.4. Selection of the Preferred Alternative.
Both the no-action and Stanley WWTP expansion alternatives were rejected for
economic reasons.
Of the Stanley to Mount Holly interconnector alternatives, option Ill was selected as
the preferred alternative. It requires two new crossings of Dutchmans Creek, one new pump
station, and eliminates four existing pump stations. Options I and II require maintenance of
two pump stations, and option II also requires an additional Dutchmans Creek crossing.
Option I includes a force main, rather than gravity sewer, from the mouth of Taylor
Creek to the lower end of the project, and would allow preservation of a wider forested buffer
along Dutchmans Creek. The project engineers determined that the environmental benefits of
a wider buffer do not justify the higher construction and maintenance costs or the increased
risk of blockage or mechanical failure at the two new pump stations.
4

5.0. ENVIRONMENTAL CONSEQUENCES.
5.1. Land Use Changes.
Based on a 40-foot wide construction corridor, the project will disturb 25 acres,
including 16 acres of forest. The remaining acreage is previously disturbed land including road
and utility rights-of-way, lawns, pasture, old fields, and cutover land. A 20-foot wide
permanent access corridor will be maintained by periodic mowing.
Secondary and cumulative impacts of induced urban growth may affect land use
throughout the South Stanley Creek and Taylor Creek watersheds. The major changes will
be along NC-27 between Stanley and Mount Holly, where industrial park development is under
way. The DEM-mandated local watershed protection ordinances (Stanley, Mount Holly, and
Gaston County) will regulate the density and types of new development in those areas within
WS-IV watersheds, as discussed in section 5.8.
5.2. Prime and Unique Farmland.
Most of the project corridor is either frequently flooded or too steep to qualify as prime
farmland. Chewacla loam is a prime farmland soil only where it is drained and protected from
flooding or not frequently flooded during the growing season. Chewacla loam is the most
abundant soil mapped in the project corridor, but there are no flood control dams in or
upstream of the project area.
Helena sandy loam and Winnsboro loam are prime farmland soils where they occur on
slopes less than 8 percent, including a 2,500 foot segment between the Jackson Park pump
station and NC-27, and a few small areas along South Stanley Creek. None of these areas
was in cultivation during the field reconnaissance (April to May, 1996).
Following construction, areas of prime farmland soils will continue to be suitable for
agriculture except for the small areas occupied by manholes. Loss of prime farmland soils to
induced urban development in the wastewater service area is likely to occur. The rate and
geographic distribution of such loss will depend on social and economic factors, and cannot
be predicted.
•
5.3. Public, Scenic, and Recreational Lands.
A ball field and playground on the north bank of South Stanley Creek east of SR 1923
is the only dedicated public recreational area in the project corridor. Use of this facility will
be interrupted during construction, but no long-term impacts are expected.
Dutchmans Creek is a popular bank fishing stream for largemouth bass, redbreast
sunfish, catfish, and white bass during their spring spawning migration, according to local
anglers. The segment most heavily fished extends from the Main Street bridge in Mount Holly
to the mouth of Dutchmans Creek. Fishing access from Main Street to NC-273 Bypass may
be temporarily interrupted during construction, but no long-term direct impacts of the project
are anticipated. Induced urban growth, however, may adversely affect fish habitat and public
access to Dutchmans Creek, as discussed in section 5.12.
5

5.4. Archaeological and Historical Resources.
No archaeological or historical inventory of the project corridor has been conducted.
The State Historic Preservation Office, N.C. Department of Cultural Resources,will determine
whether further information is required.
5.5. Air Quality.
An increase in airborne particulates and exhaust emissions from construction vehicles
will occur during construction, but the public health impacts of these emissions will be
negligible. No operational air quality impacts of the project are anticipated. The wastewater
pump station will be located 200 feet or more from the nearest residence.
Induced urban growth will result in increased air pollutant emissions from vehicles and
certain industrial activities. Gaston County has exceeded EPA threshold criteria for air
pollutants during previous years, and requires annual emission testing of gasoline fueled
vehicles.
5.6. Noise Levels.
Residents adjacent to the project corridor may experience nuisance noise levels during
construction, which will be limited to daylight hours. Operational noise of the facility will be
negligible.
Induced urban growth will cause an increase in noise from vehicles and construction
activities. Residences along NC-27 are most likely to be affected.
5.7. Groundwater Resources.
The project area is almost entirely impervious, and all rainfall on the site is transported
through storm drains to surface streams. No impacts of the project on groundwater recharge
are anticipated.
5.8. Surface Water Resources.
Project construction will cause a temporary increase in turbidity and sediment load in
adjacent streams. These impacts will be minimized by employing standard erosion control
practices. An Erosion and Sedimentation Control Plan will be submitted to the DEHNR
Mooresville Regional Office for approval at least 30 days prior to construction.
No direct adverse operational impacts of the project on water quality are anticipated.
Impacts of the Mount Holly WWTP effluent on Lake Wylie are regulated by specific limits
established in the plant's NPDES discharge permit.
6

•
The project will deter new septic systems and reduce the number of existing ones in
the wastewater service area. Failing septic systems are a common source of surface water
pollution, especially in areas of clayey soils.
Induced urban growth may adversely affect surface water quality in several ways. An
increase in impervious surface area causes a corresponding increase in peak-stormflows,
exacerbating channel erosion. Base flows during dry weather are subsequently reduced,
causing small perennial streams to become intermittent,concentrating pollutants,and creating
high temperature and low-oxygen conditions. Destruction of riparian forests, culverts,
drainage improvements,and artificial channel stabilization may also contribute to water quality
degradation.
5.9. Introduction of Toxic Substances.
Potential sources of toxic substances during construction may include exhaust
emissions, oil, fuel, and other vehicle fluids. There are no known petroleum storage tanks or
facilities containing hazardous materials to be removed in the project area.
No releases of toxic substances are anticipated from operation of the project.
5.10. Eutrophication of Receiving Waters.
Nutrient loading to streams in the project area may temporarily increase due to soil
erosion during construction, but should be negligible provided that erosion control practices
are followed. In flowing streams, most sediment-associated nutrients remain bound to clay
particles where they contribute little to eutrophication. These nutrients generally become
bioavailable when they settle into the anaerobic hypolimnion of a seasonally stratified pond
or reservoir, such as Lake Wylie located one mile downstream of the project. Any additional
nutrient loading impacts from project construction will be negligible.
Nutrient loading from the Mount Holly WWTP is controlled by effluent limits specified
in the plant's NPDES discharge permit.
5.11. Jurisdictional Wetlands and Waters.
The final alignment best avoids the twelve wetlands in the project area. Preliminary
calculations indicate that the unavoidable wetland area affected is less than one acre, pending
COE verification.
Following construction, wetlands will be restored to pre-construction grade, and the
permanent mowed access corridor limited to 10 feet wide. Anti-seep collars will be installed
per DEM specifications to prevent the gravel-filled trench from draining the wetlands.
Induced development will cause further loss and degradation of wetlands throughout
the project service area. The rate and distribution of such losses cannot be predicted.
7

•
5.12. Fish and Aquatic Habitats.
Fish and other aquatic organisms may be temporarily affected by elevated silt loading,
turbidity, and silt-associated pollutants during construction. Clearing of riparian forests along
segments where steep slopes or other design factors preclude the preservation of a wide
buffer may cause permanent changes in stream habitat and water quality, thereby affecting
fish populations.
Induced development may further degrade aquatic habitats as discussed in section 5.8.
5.13. Wildlife and Terrestrial Habitats.
Habitat types disturbed by project construction are summarized in Table 1. The natural
forested community types are described in section 3.6.
High quality mesic forests in the project area contain canopy trees averaging 25 to 35
inches diameter at breast height (dbh) and regionally rare species such as bigleaf magnolia
(Magnolia macrophylla), nodding trillium (Trillium rugelli) and yellow lady slipper (Cypripedium
pubescens). Three such high quality segments occur between wetland F and wetland L along
South Stanley Creek.
High quality alluvial forests in the project corridor, with 25 to 35 inch dbh canopy
trees, are located in two segments along Dutchmans Creek between Main Street and the
Woodlawn Avenue pump station.
The project will cause fragmentation of forests along 14,400 feet of corridor, and will
disturb forest edge habitat along an additional 4,600 feet. The mowed corridor may promote
the success of invasive exotic species such as Chinese privet and Japanese honeysuckle, and
may deter certain wildlife species that require tracts of unbroken forest.
Induced urban growth will cause further loss of natural communities. The rate and
geographic distribution of such loss will depend on social and economic factors, and cannot
be predicted.
5.14. Rare and Protected Species.
The N.C. Natural Heritage Program has records of eighteen rare plant or animal species
from Gaston County. Four of these are either federally protected (E or T), federal candidates
(C 1 or C2), or state protected (E, T, or SC) (Table 2).
For two of these species,the highfin carpsucker (Carpiodes yeller) and the bog turtle
(Clemmys muhlenbergii), there is no suitable habitat in the project area, and no adverse
impacts on these species are anticipated.
Suitable habitat for the loggerhead shrike (Lanus ludovicianus) occurs in fields and
pastures in the project area. No shrikes were detected during the field reconnaissance, and
the project will not significantly reduce suitable habitat.
8

Marginally suitable habitat for Georgia aster(Aster georgianus) occurs along the edges
of mesic-dry forests, including edges of road or utility rights-of-way. The field reconnaissance
was too early in the season to reliably detect and identify Georgia aster. If present in the
project area,construction may destroy some individuals, but will create additional forest edge
habitat suitable for the species. Therefore, no adverse net impact is anticipated.
One unprotected rare species was encountered, the bigleaf magnolia (Magnolia
macrophylla). A population of this tree occurs along a 3,500 foot segment of the project
corridor between the Twin Brooks pump station and the mesic slope adjacent to wetland J
(Figure 2c). The greatest density and largest specimens are in the 1,000 foot segment
immediately north of the Duke Power/Gastonia raw water line ROW. Approximately fifty 4-
to 15-inch dbh trees will be eliminated; saplings less than 4 inches dbh were not counted.
Fewer and smaller specimens occur on the opposite bank of South Stanley Creek, but the
project engineers determined that construction on this side may not be feasible due to the
greater trench depth required.
6.0. MITIGATIVE MEASURES.
The project engineers revised their preliminary sewer alignment following RJG&A's
delineation of jurisdictional wetlands, so that the final proposed design avoids and minimizes
wetland impacts to the extent practicable. Unavoidable impacts include disturbance of less
than 1.0 acre of headwater wetlands, pending COE verification, and can be permitted under
Section 404 Nationwide Permit 12 and its corresponding Section 401 General Water Quality
Certification. Compensatory mitigation is not likely to be required, provided that conditions
of the Nationwide Permit are met.
Impacts of induced development will in part be mitigated by municipal and county
water supply watershed protection ordinances. Other than the buffers required by these
ordinances, which restrict construction but do not require maintenance of natural vegetation,
no local program for riparian corridor protection exists.
9

7.0. LITERATURE CITED.
Woody, J.W. 1989. Soil survey of Gaston County, North Carolina. U.S.Department
of Agriculture, Soil Conservation Service, Raleigh, N.C. 118 p. + maps.
Daniel,-C.C. III and R.A. Payne. 1990. Hydrogeologic Unit Map of the Piedmont and
Blue Ridge Provinces of North Carolina. U.S. Geological Survey Water Resources
Investigations Report 90-4035. Raleigh, N.C. 1 p.
Environmental Laboratory. 1987. Corps of Engineers Wetlands Delineation Manual,
Technical Report Y-87-1 . U.S. Army Engineer Waterways Experiment Station, Vicksburg,
Miss. 100 pp. + appendices.
N.C. Division of Land Resources. 1985. Geologic map of North Carolina. N.C.
Department of Natural Resources and Community Development -Geological Survey, Raleigh,
N.C. 1 p.
Schafale, M.P. and A.S. Weakley. 1990. Classification of the Natural Communities of
North Carolina - Third Approximation. North Carolina Natural Heritage Program, Division of
Parks and Recreation, NC DEHNR, Raleigh, N.C., 325 pp.
10

Table 1. Land Use and Habitat Types in the Project Construction Corridor.
HABITAT TYPE LENGTH (feet)
Floodplain forests (Alluvial, Levee, and Bottomland Forest)
Edge -- Adjacent to existing road or utility 1,300
Unbroken forest 9,000
Mesic Forests (Mesic Mixed Hardwood and Basic Mesic Hardwood)
Edge -- Adjacent to existing road or utility 1,400
Unbroken forest 5,400
Dry-Mesic Oak/Hickory Forest
Edge -- Adjacent to existing road or utility 1,900
Unbroken forest 0
Floodplain scrub (marsh, old field, saplings, wooded pasture) 3,500
Upland scrub (mesic to dry old field, saplings, wooded pasture) 900
Lawns, mowed fields, open pasture 2900
Roads, mowed utility right-of-way 800
Stream crossings 200
11

Table 2. Rare and Protected Species Known from Gaston County.
SCIENTIFIC AND STATE FED. STATE GLOBAL
COMMON NAME PROT. PROT. RANK RANK
Gaston
Vertebrates
CARPIODES VELIFER SC - S2 G4G5
HIGHFIN CARPSUCKER
CLEMMYS MUHLENBERGII T C2 S2 G3
BOG TURTLE
LANIUS LUDOVICIANUS LUDOVICIANUS SC 3C S3B,S3 G5T5
LOGGERHEAD SHRIKE
Invertebrates
AMBLYSCIRTES REVERSA SR - S3? G4
REVERSED ROADSIDE SKIPPER
AUTOCHTON CELLUS SR - S1S2 G4
GOLDEN-BANDED SKIPPER
ERYNNIS MARTIALIS SR - S3? G4
MOTTLED DUSKY WING
POLITES MYSTIC SR - SR G5
LONG DASH
Vascular plants
AMORPHA SCHWERINII SR - S3 G3
PIEDMONT INDIGO-BUSH
ASPLENIUM BRADLEYI C - Si G4
BRADLEY'S SPLEENWORT
ASTER GEORGIANUS C C2 S2 G2G3
GEORGIA ASTER
FOTHERGILLA MAJOR C - S2 G3
LARGE WITCH-ALDER
JUNIPERUS COMMUNIS VAR DEPRESSA C - Si G5T5
DWARF JUNIPER -
MAGNOLIA MACROPHYLLA SR - S1S2 G5
BIGLEAF MAGNOLIA
NESTRONIA UMBELLULA SR 3C S3 G4
NESTRONIA
QUERCUS ILICIFOLIA SR - Si G5
BEAR OAK .
QUERCUS PRINOIDES C - SH G5
DWARF CHINQUAPIN OAK
SMILAX BILTMOREANA C - S3 G3
BILTMORE CARRION-FLOWER
THERMOPSIS MOLLIS SENSU STRICTO SR - S2? G3G4
APPALACHIAN GOLDEN-BANNER
Natural communities
BASIC OAK—HICKORY FOREST - - S3 G4
DRY OAK—HICKORY FOREST - - S4 G5
DRY-MESIC OAK—HICKORY FOREST - - S5 G5
GRANITIC FLATROCK - - S2 G3
LOW ELEVATION ROCKY SUMMIT - - S2 G2
NC NATURAL HERITAGE PROGRAM. NC DIVISION OF PARKS AND RECREATION,DEUNR FEBRUARY 1995
Data compiled using BCD software developed by The Nature Conservancy.
12

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\_ I \` t ` Wetlands for Stanley to Mount
• :) •• 1 Holly Wastewater Interconnector.
_, `�/ Robert J. Goldstein & Associates, Inc.
lt \\t:`'� ld •6� •
4 N„ A ` i ENVIRONMENTAL CONSULTANTS
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/ ' Raleigh, North Carolina 27604-3175
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AI ��- Holly Wastewater Interconnector.
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j > _ - Holly Wastewater lnterconnector.
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\,� \ Holly Wastewater Interconnector.
f �J 6 �`; ` Robed J. Goldstein & Associates, Inc.
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•• T. n "q F h osal, �,

WASTEWATER INTERCONNECT AGREEMENT
14

•
NORTH CAROLINA WASTEWATER INTERCONNECT
AGREEMENT
GASTON COUNTY _
THIS AGREEMENT, Made and entered into this /r;+ day of
March , 1996 , by and between the CITY OF MOUNT FOLLY,
a municipal corporation having a charter granted by the State of
North Carolina, hereinafter referred to as the "City" ; and the
TOWN OF STANLEY, a municipal corporation having a charter granted
by the State of North Carolina, hereinafter referred to as the
"Town" ;
WITNESSETE:
WHEREAS , the Town wishes co assure itself of adequate wastewater
treatment capacity far present and future development by
utilizing a portion of the capacity of the present and
future wastewater facilities owned and operated by the City;
and,
WHEREAS, City has agreed to allocate to Town a portion of the
wastewater treatment capacity at City' s present or future
wastewater plants under the terms and conditions set forth
herein.
NOW, THEREFORE, in consideration of the terms, conditions, and
covenants hereinafter sec forth herein, it is agreed between the
parties as follows:
PURPOSE : The purtcse of agreement is to construct
an .:arT sewer - , __e—ins, and ar:purzenancss ,
:_rg !..av 27 =n4 S rh ..:a..-ev Caeca ' nz=r:onn=c: 0-a
wastewater systems the mu^.: izalities , and to thereafter
p :'i_. a =o: an. ac:a.en` Nhereb'T ty will accect and ... c_ .
a cor__on of _own' s wastewater .
2. LEAD AGENCY: The City shall serve as lead agency for the
construction of the sewer interconnect project (hereinafter
referred to as "the Project" ) , and agrees to commence and
complete the Project within a reasonable time after
execution of this agreement, following the funding schedule
as established from time to time by the Project Engineer.
The schedule for the Project shall be established by the
project engineer and shall be approved by the
municipalities. The Town will have the right to inspect
documents, . materials, papers and other related items at any
point during the Project, with proper notification to the
City, and the City shall have the project engineer provide
copies of all correspondence, reports, documents and ocher
related project materials to the Town.
3 . PROJECT ENGINEER: The municipalities approve the employment
of the engineering firm of W. K. Dickson, Inc. as project

engineer, and shall use said engineering firm or such other
firm as the parties may hereafter agree. The Project
Engineer selected by the parties must agree that engineering
costs are "ultimately borne by Town and that the Project
Engineer will not pursue reimbursement from City except tc
the extent funds are provided to City from Town.
4. DESCRIPTION: The City agrees to construct or let contracts
for the construction of the following described facilities :
A. Sewer Lines of the approximate diameter and lineal
feet as shown on Exhibit A.
B. Master Meter: connection of the municipal sewer
systems will be through a master meter near Highway 27
at or near the Duke Power right-of-way, south of the
Twinbrook Industrial Park.
C. Pump Stations : additions and improvements will be
made to City' s existing wastewater pump stations
located on Woodlawn Avenue and on Dutchman' s Creek.
The pump stations will be enlarged and upgraded to
accept the additional flow from Town and from increased
needs in City' s service area. The approximate cost of
such work is shown on Exhibit A.
5 . DESIGN: The proposed sewer lines, pump station improvements
master meter, and appurtenances, shall be designed and
constructed in accordance with the specifications of the
municipalities. The project engineer shall be employed
through the City to complete the design and specifications
for the project and to conduct other related work necessary
for the successful completion of the project. Plans and
specifications shall be approved by the municipalities prior
cc being let for bid. The City shall provide to the Town a
cc=v of the contt= •_ r.^ plans and a set of as-built clan_
at the c:.acLe.ior. of :he Project. 3ids for the Project will
not be awarded until reviewed and approved by both parties .
6 . _ =NANC=NG:
A. The project cost for the aforementioned facilities is
estimated to be two million, eight hundred thousand seven
hundred ($2,800 ,700 .00 ) Dollars. The financing of the
Project is to be provided solely by the Town and is
contingent upon the Town obtaining the following agreements
pertaining to financing:
1) The interlocal sewer interconnect agreement to be
entered into by Gaston County and the Town.
2) Approval of the sewer interconnect by the North
Carolina Department of Environment, Health and Natural
Resources (NCDEHNR) Division of Environmental
Management.
3 ) Funding approval by the Construction Grants and
Loans Section of NCDEHNR Division of Environmental
Management.
B. City will not incur any expense regarding the design or
construction of the Project, until the Town has provided
2

satisfactory evidence to City that Town has the availability
of funds necessary to complete the Project and reimburse
City for such expenses . During the performance of this
agreement, the City will submit monthly payment requests to-
the Town for reimbursement of eligible Project expenses,
which Town will reimburse within thirty ( 30 ) days of
receipt . All change orders will be approved by both
municipalities. Eligible Project expenses shall _nclude
design services, rights-of-way expenses, legal fees, and
construction costs and other expenses reasonably necessary
to carry out the terms of this agreement. Design services
are to include preparing plans and specifications,
surveying, easement mapping, contract administration and
construction observation services.
7. CONSTRUCTION SCHEDULE AND INSPECTION: Due to the funding_ of
the Project, the Project will be developed according to the
following guidelines:
The City agrees to commence the Project within a reasonable
time after execution of this Agreement. The Project
schedule will be established by the Project Engineer and
shall be approved by the Town and the City. The Town has
bond funding which requires all money be spent and the
Project closed out by May 31, 1998 . The City will schedule
design, bidding and construction to complete all
construction by December 31, 1997.
8. RIGHTS OF WAY: The City shall obtain all rights-of-way and
encroachment agreements as necessary for that portion of the
Project to be constructed east of the location of the Master
Meter, and Town shall obtain all such rights-of-way and
encroachment agreements for that portion west of _ e
location of the Master Meter .
ONN Rc--- , r=�_,:^ ... . AND MAINTZ 7=_NCE :
._ upon tt..t_ ct -r- ril of t_._ :rojec- , as cert- = a,'
the Project EnginCer, Town shall own, operate and maintain
chat portion of the Project lying west of the Master Meter.
All other portions of the Project and appurtenances thereto
including the Master Meter and pump stations shall be owned,
operated, and maintained by City. Notwithstanding the
foregoing, however, if Town shall obtain funding which
requires Town to retain ownership of the sewer .outfall line,
then it is agreed that Town shall have ownership of said
outfall line, which would otherwise belong to City, and
shall lease the same to City for One ($1 . 00) Dollar per year
until such time as Town may convey ownership of the same to
City without violating the terms of its funding. The
aforesaid sewer line will then be conveyed to City without
charge.
B. City shall have the exclusive right to allow sewer taps
into that portion of the sewer outfall line belonging to
City or leased by City from Town. Town shall have the
exclusive right to allow sewer taps into that portion of the
sewer outfall line belonging to Town and not leased to City,

subject, however, to the service area limitations set forth
in Paragraph 10 below.
C. If either municipality shall hereafter annex a water or
sewer customer then being served by the other municipality,
then such annexing municipality must provide for such water
and/or sewer service through its own facilities ( i . e. , sewer
lines, pump stations ) within one (1 ) _Year of the effective
date of such annexation.
10. WASTEWATER SERVICE AREA: It is agreed that wastewater
passing through the master meter to be treated by the City
shall only contain wastewater originating from sources
within the resent or future corporate limits of the Town,
the present or future extraterritorial zoning jurisdiction
of the Town, and those sources presently served by the Town
located outside both the present corporate and
extraterritorial zoning jurisdiction of the Town. The Town
agrees that at no time will it provide sewer service to any
areas except those listed in this paragraph 10 if such
service should generate wastewater flowing through the
Master Meter to the City' s wastewater treatment facility,
without prior written consent of City.
11. WASTEWATER TREATMENT: City presently utilizes approximately
65% of the treatment capacity at its existing wastewater
treatment facility. City agrees that it will make available
to Town under the terms of this agreement sufficient
capacity at its present wastewater treatment plant to treat
up to 200 ,000 gallons per day of wastewater from the Town.
City further agrees not to unreasonably deny to Town
additional treatment capacity within its current wastewater
treatment plant, _:cvided that such additional wastewater
does not jec:ard__e City' s capacity to provide service
i_ then ex st _er7 area. flown agrees pay to C' ty
for wastewater treatment at City' s present facility a _ate
ecual co City' s inside sewer raze as ma'' he
established by City from time to time. This race shall
continue in effect until changed as hereinafter set forth.
The City will provide meter readings to Town on or about the
first day of each month f•,r the preceding month ' s usage, and
Town will pay to the City its sewer charges within 15 days
of the receipt of such billing. Any late payment not
received 15 days of said billing will carry a. 1-1/2% late
payment charge.
12. FUTURE EXPANSION OF CITY'S TREATMENT FACILITY: City' s
current facility was completed in 1976.. Advances in
wastewater treatment technology, additional treatment
requirements proposed by the State, and increased demand are
all factors to be considered by City regarding a future
upgrade and expansion (hereafter referred to as "U&E") of
its wastewater facility. The City proposes to expand and
upgrade its facility when any of the following events occur:
1. The flow capacity of the facility reaches 90% of
its capacity;

2. The City' s NPDES permit limits require an upgrade;
3 . Ac such other time as the City may deem it
appropriate.
Such a U&E would include but not be limited co those
improvements set forth in a facilities study entitled
"Wastewater Treatment Plan Expansion Study" , performed by W.
K. Dickson, Engineers, dated January 1995 , a copy of which
is retained by both parties.
13 . PARTICIPATION BY TOWN UPON U&E OF CITY'S TREATMENT FACILITY:
In consideration of the mutual agreements contained herein,
the City agrees to include in the U&E . 5 million gallons (or
such greater amount as Town may request prior to preliminary
design) of hydraulic capacity and a proportionate .share of
the U&E treatment capacity (i.e. , capacity to treat BOD,
TSS, nutrients, and other regulated constituents ) for use by
Town, and Town agrees to accept and pay for the same under
the terms and conditions hereinafter set forth.
A. City will notify Town in writing at such time as
City desires to begin engineering design for the U&E of
its wastewater treatment plant.
B. The portion of the U&E cost to be paid by Town
will be equal to the product of the entire U&E cost
multiplied by a fraction, the numerator of which is .5
million gallons per day (or such greater volume of
capacity as Town may timely elect) , and the denominator
of which is equal to the increased treatment capacity
of the U&E (as compared to City' s present capacity per
day a: its ^resent treatment facility) exmr=cc= :-
million gallons per day. 3v way f9=t= -P ,
=an_a ' a a..a_c cf the :.&E cost would be ` 2 .
according to the following example :
(u&E cost) C_UM x 0 . 5 MGD ( reserve for Town ) =
-
2. 0 MGD ( incr====^ caw. )
C. The Town shall pay to the. City the pro-rata share
of each installment as the installments come due on
City' s bond indebtedness incurred to construct the U&E.
By way of illustration, if the U&E cost is $10 million
and Town' s portion of these costs is $2.5 million, Town
would pay to City twenty-five percent of each
installment. If City should pay off the bond issue
early, Town shall nevertheless continue to make
installments according to the initial amortization
schedule, unless the parties shall agree to a different
amortization. Town may, however, pay off their portion
of the indebtedness at any earlier date as Town may
elect.
D. Town' s rate for wastewater treatment by City shall
be reduced from 125% of City's inside rate as the same
may be changed from time to time to 100% of the City's
5

inside rate beginning on the first day of the utility
•
billing cycle immediately following Town' s first
payment to City of its portion of City' s bond payment
or at such time as the U&E is completed and in use,
- - whichever shall occur first. Thereafter, Town' s rats
shall continue to be 100% of the City' s inside rate as
the same may be from time to time established until
such time as Town has paid City for its portion of the
plant OBE; thereafter the Town' s rate for sewer
treatment by City will be 125% of the rate charged to
City' s inside customers as the same may be from time to
time established. In the event that Town should be in
default of its obligation to pay its pro-rata share of
each installment of the bond indebtedness, then Town' s
rate during such default shall be increased to 125% of
City' s inside rate, and City may, in addition, pursue
such legal recourse as may be available to enforce the
terms of this agreement.
E. The parties expressly agree that Town will be
paying a fractional amount as set forth above based
upon the entire cost of the U&E and not solely the
additional costs of including into the U&E Town' s
reserved capacity. It is for this reason that the
Town' s sewer rate charged by the City is dnr.-- =fed
until such time as Town has paid for its portion of the
Plant U&E.
14. TERM OF AGREEMENT: This agreement shall continue for a term
of forty ( 40 ) years from and after the date of the execution
hereof.
15 . SEWER USE REGULATIONS: Town agrees that it will keep i*h
force at all times and enforce a Sewer Use Ordinance
=crovec by -h= Sate of North Car a. Ttli = r.._- -
:JCIl_ same or si iil-r that in ==-='--
-_T of Hou.= Hollv. At a1_ times during :his -:r==merit
C_ will issue a sewer use cermit to Town in acoc__=....c
with the C_=_i' s sewer use ordinance and recu_ation: and
recuirements as may be :romulgated from time to time by the
State of Nor_h Carolina Department of Environment, Health
and Natural Resources (DEHNR) for significant industrial
users as defined by the DEHNR. During the term of this
Agreement, at Town' s election, City will administer Town's
pretreatment program pertaining to those industries
discharging sewer through the Master Meter to be treated by
City. Town will reimburse City the reasonable cost
associated with administering Town' s pretreament program.
Town agrees to submit to the City all applications for
industrial discharges which pass through the master meter to
be treated by the City. No industrial discharge permits will
be issued by Town until reviewed and approved by City. The
City will review and approve or disapprove permits and, if
necessary, perform a headworks analysis to determine the
City' s ability to treat such wastewater within Town' s
remaining reserved capacity. City will approve such permits
6

•
if Town then has sufficient remaining treatment capacity
within its reserve. The City will approve such permit on
the same basis as it approves similar applications for
permits by industrial users within the City of Mount Holly,
taking in consideration the proportionate amount of the
wastewater treatment capacity reserved by the City for the
Town both relating to its current wastewater facility and
any upgraded or expanded facility. City will not violate
the provisions of this paragraph for any purpose including
the purpose of inducing industries to locate within City.
16 . TOWN'S FUTURE SEWER NEEDS: At such future date as Town' s
wastewater flow based on a yearly average exceeds 80% of the
capacity purchased by Town in the U&E, then Town should
undertake negotiations for additional treatment capacity.
City will take in consideration any unused plant. -capacity
then present within the U&E and the needs of City, Town, and
any other parties sharing such capacity. City will
thereupon allocate to Town such unused capacity as City may
elect in its sole discretion. The rate for such additional
capacity shall be negotiated between the parties . If such
unused capacity is not sufficient to provide Town with sewer
treatment commensurate with its demand, then City agrees to
construct additional capacity at its wastewater facility
prior to Town' s usage exceeding 90% of its reserved capacity
in the U&E, provided that Town bear all expense relating to
an additional U&E for Town' s benefit.
IN WITNESS WHEREOF, the parties hereto have caused this
Agreement to be signed by their duly authorized representatives
the day and year first above written.
CITY OF .MOUNT HOLLY
v : :�i' rc./ ///1cT`��_
r r n{ 7. McLean, M: -o-
=.t-est:
(531.1AGA41.14
Cit Clerk
( seal)
TOWN OF STANLEY
ail R. "BrO hereon, Ma or
Attest:
City Clerk
(seal)
K#203
7

exh , b;+ A
REGIONAL SYSTEM -TREAT HWY 27 INDUSTRIAL AREA 0 MT HOLLY WWTP:
1. STANLEY WWTP IMPROVEMENTS:
Sludge Facilities (Required to meet 503 Sludge Rules) 583,000
Dechlorination 45,000
Standby Power 85,000
Misc. Items 100,000
Estimated Construction Cost: $813,000
Engineering, Legal&Admin. Cost: 50,000
Supplemental Construction Observation: 4,000
Contingencies:. 48,000
Subtotal: $915,000
Engineering Cost to Date to expand WWTP to 1.0 MGD: 216,500
Total Project Cost: $1,131,500
2. SEWER INTERCONNECT WITH MT HOLLY:
Mt Holly System Improvements:
21" SS 1,104,000
18" SS 102,000
15" SS 136,000
18" FM 13,500
Woodlawn Ave PS 325,000
Dutchman Ck PS 350,000
Interconnect Meter 50,000
Stanley System Improvements:
8" SS 164,000
Estimated Construction Cost: $2,244,500
Engineering, Legal&Admin. Cost: 322,000
Contingencies: 246,200
Total Project Cost: $2,812,700
3. MT HOLLY TREATMENT CAPACITY COST:
0.5 MGD Treatment Capacity @ Mt Holly $2,520,000
AVAILABLE STATE FUNDING: •
State Bonds: Approved Funding: $3,098,500
Potential Funding: 500,000
Total: $3,598,500

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CONSULTING ENGINEERS
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STANLEY WASTEWATER TREATMENT PLANT PEAK FLOWS
JAN 1994 MAR 1994 MAY 1994
PEAK AVG PEAK PEAK AVG PEAK PEAK AVG PEAK
HR DAY FACTOR HR DAY FACTOR HR DAY FACTOR
DAY
1 0.600 0.480 1.25 0.500 0.344 1.45 0.425 0.421 1.01
2 0.550 0.384 . 1.43 1.375 0.943 1.46 0.500 0.451 1.11
3 0.625 0.405 1.54 1.300 1.267 1.03 0.550 . 0.417 1.32
4 1.200 1.105 1.09 0.600 0.482 1.24 0.675 0.561 1.20
5 0.750 0.745 1.01 0.500 0.377 1.33 0.525 0.398 1.32
6 0.700 0.569 1.23 0.525 0.390 1.35 0.600 0.392 1.53
7 0.700 0.506 1.38 0.500 0.354 1.41 0.525 0.406 1.29
8 0.750 0.549 1.37 0.600 0.356 1.69 0.475 0.415 1.14
9 0.575 0.418 1.38 0.600 0.349 1.72 0.500 0.395 1.27
10 0.475 0.459 1.03 0.750 0.643 1.17 0.475 0.446 1.07
11 0.425 0.389 1.09 0.625 0.520 1.20 0.450 0.397 1.13
12 1.125 0.668 1.68 0.625 0.476 1.31 0.475 0.432 1.10
13 0.375 0.610 0.61 0.550 0.477 1.15 0.425 0.388 1.10
14 0.625 0.411 1.52 0.650 0.387 1.68 0.550 0.457 1.20
15 0.500 0.464 1.08 0.600 0.464 1.29 0.425 0.350 1.21
16 0.450 0.445 1.01 0.600 0.427 1.41 0.450 . 0.437 1.03
17 0.750 0.321 2.34 0.575 0.467 1.23 0.450 • 0.400 1.13
18 0.600 0.567 1.06 0.625 0.361 1.73 0.500 0.434 1.15
19 0.500 0.411 1.22 0.575 0.453 1.27 0.525 0.384 1.37
20 0.475 0.348 1.36 0.600 0.477 1.26 0.500 0.377 1.33
21 0.475 0.375 1.27 0.600 0.470 1.28 0.475 0.459 1.03
22 0.425 0.355 1.20 0.750 0.456 1.64 0.450 0.401 1.12
23 0.500 0.467 1.07 0.625 0.432 1.45 0.525 0.429 1.22
24 0.400 0.347 1.15 0.625 0.468 1.34 0.450 0.452 1.00
25 0.450 0.393 1.15 0.575 0.476 1.21 0.500 0.406 1.23
26 0.550 0.424 1.30 0.575 0.376 1.53 0.525 0.437 1.20
27 0.500 0.403 1.24 0.750 0.454 1.65 0.500 0.454 1.10
28 1.000 0.591 1.69 0.750 0.621 1.21 0.425 0.387 1.10
29 0.500 0.437 1.14 1.300 1.242 1.05 0.375 0.353 1.06
30 0.450 0.436 1.03 0.750 0.650 1.15 0.475 0.462 1.03
31 0.425 0.381 1.12 0.650 0.497 1.31 0.475 0.365 1.30
AVG 0.479 AVG 0.521 AVG • 0.418
PEAK = 1.259 PEAK = 1.361 PEAK = 1.174
Page 1

•
(5 z /
STANLEY WASTEWATER TREATMENT PLANT PEAK FLOWS
JULY 1994 SEP 1994
PEAK AVG PEAK PEAK AVG PEAK
HR DAY FACTOR HR DAY FACTOR
DAY
1 0.475 0.456 1.04 0.650 0.514 1.26
2 0.450 0.431 1.04 0.625 0.582 1.07
3 0.650 0.432 1.50 0.650 0.449 1.45
4 0.550 0.428 1.29 0.475 0.444 1.07
5 0.375 0.332 1.13 0.625 0.462 1.35
6 0.550 0.271 2.03 0.400 0.296 1.35
7 0.500 0.436 1.15 0.750 0.438 1.71
8 0.375 0.339 1.11 0.750 0.491 1.53
9 0.475 0.384 1.24 0.700 0.499 1.40
10 0.475 0.425 1.12 0.525 0.455 1.15
11 0.500 0.449 1.11 0.450 0.415 1.08
12 0.375 0.329 1.14 0.800 0.470 1.70
13 0.375 0.354 1.06 0.475 0.413 1.15
14 0.500 0.382 1.31 0.450 0.419 1.07
15 0.550 0.372 1.48 0.700 0.478 1.46
16 0.525 0.497 1.06 0.450 0.446 1.01
17 0.500 0.435 1.15 0.500 0.457 1.09
18 0.500 . 0.310 1.61 0.525 0.456 1.15
19 0.625 0.406 1.54 0.500 0.485 1.03
20 0.625 0.439 1.42 0.475 0.450 1.06
21 0.550 0.489 1.12 0.550 0.367 1.50
22 0.475 0.404 1.18 0.400 0.376 1.06
23 0.650 0.435 1.49 0.500 0.414 1.21
24 0.550 0.441 1.25 0.575 0.347 1.66
25 0.500 0.487 1.03 0.750 0.707 1.06
26 0.375 0.361 1.04 0.500 0.388 1.29
27 0.425 0.485 0.88 0.475 0.439 1.08
28 0.450 0.445 1.01 0.500 0.436 1.15
29 0.500 0.429 1.17 0.550 0.447 1.23
30 0.475 0.385 1.23 0.500 0.442 1.13
31 0.475 0.497 0.96
AVG 0.412 AVG 0.449
PEAK = 1.222 PEAK = 1.251 1.254
Page 2

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u4,za/ b uu:oz FAA 319 277 6034 FLUIDYNE - -•-- Heyward NC . 21002
/ 7 0( ZI
FLUIDYNE JET AERATION CALCULATIONS
PROJECT: Jet Aeration-Aerobic Digester
Location: Stanley, North Carolina
DATE &TIME: April 25, 1996
INFLUENT CONDITIONS Pl#1
Site Elevation (in feet) C� 500
Lbs of Dry Solids Per Day L
Lbs of 02/LB of VSS 1.42
• Actual Oxygen Demand (lb 02/d)Total - 36'' I.3 q
Alpha 0.7
Beta 0.95
Theta 1.024
Operating Dissolved oxygen(mg/I) 2
Clean Water oxygen sat. at op.temp(mg/I) 9.09
Clean Water oxygen sat. at std.temp(mg/I) 9.09
Clean water 02 sat, std temp,mid depth(mg/1) 11.50
Std. condition ambiant pressure (psia) 14.7
Oper. condition ambiant pressure (psia) 14.6
Wastewater temperature(c) 2D
SOR/AOR ratio 1.86
Standard Oxygen Demand (lb 02/d)total 2109
Standard Oxygen Demand (lb 02/nr) 117
•
Pounds of oxygen/pound of air 0.23
•
Clean water efficency(%) 23
Pounds of air/cubic foot of air 0.075
Aeration hours par day 18
Air flow rate (scfm) 492
Air pressure losses(lines and nozzle) 0.7
Maximum air pressure(psig) 7.63
No. of Tanks 1
No. of Headers 1
Diameter(ft) 64
Top of Wall(ft) 20
Top water level (ft) 18
Tank Volume Imgd) , �__ 0.433

u4:z5-as Oa:52 FAA 319 277 6034 FLUIDINE 44-) Heyward NC f21003
. /8 ©, 2I
Page 2
PROJECT: Jet Aeration-Aerobic Digester
EQUIPMENT SELECTION
Air flow per nozzle (scfm) 35
Number of nozzles required 14.06
Number of nozzles provided
Actual airflow per nozzle (scfm) 30.76
Number of nozzles per header 16.00
Blower capacity provided (scfmlper header 550
flcL L.`viJS
POWER CONSUMPTION CALCULATIONS
Electric motor efficiency 0.9 D-- S i S v
Pump efficiency 0.7
Blower efficiency 0.575 .40
tit c
Pump horsepower, BHP/header 8 a°T..
7 P���
Total Blower horsepower, BHP 25 z 7 W0 w e rt- Y 1

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W. K. DICKSON & COMPANY, INC.
CONSULTING ENGINEERS
WKD#: -I(a 4-5-1. 10 G COMPUTED BY: b'``^i DATE: -/3 - /&
DESCRIPTION: Mr LOCC(J - P OLE'/ CHECKED BY: GW DATE: ��- ZZ-GI4
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OUTFALL BASIS OF DESIGN (2.5 Peak Factor-ADF @ Pipe 1/2 Full)
OPTION 3: DESIGN RATIO
2.5 PF LINE or MIN CAP d/D
DESIGN ADF PEAK LENGTH SIZE SLOPE 1/2 FULL @ PEAK
LINE 6 -5:
123,800 309,500 3,931 8" 0.004 0.248 62%
LINE 3 - 4:
STL 860,270 2,150,675
J 112,400 281,000
972,670 2,431,675 14,216 18" 0.0012 1.180 103%
LINE 2 - 3:
STL 860,270 2,150,675
J 112,400 281,000
K 114,700 286,750
I 109,200 273,000
1,196,570 2,991,425 4,628 15" 0.0015 0.812 92%
EXIST 15" 0.0015 0.812 92%
1.624
LINE E2 - 2:
F 380,000 950,000
E 46,000 115,000
426,000 1,065,000 550 16" 0.0015 0.964 55%
LINE 2 - 1:
STL 860,270 2,150,675
J 112,400 281,000
K 114,700 286,750
I 109,200 273,000
C 92,800 232,000
E 46,000 115,000
F 380,000 950,000
G 358,250 895,625
2,073,620 5,184,050 4,163 27 0.0008 2.841 91%
LINE El -Al:
A 132,700 331,750
H 263,300 658,250
396,000 990,000 428 15" 0.002 0.937 53%
W. K. DICKSON Page 1 9/5/96

. ' 6 012 S)
LINE 1A- 1:
D 82,000 205,000
B 407,500 1,018,750
A 132,700 331,750
H 263,300 658,250
885,500 2,213,750 315 21" 0.002 2.298 48%
LINE 1 B - 1A:
D 82,000 205,000
B 407,500 1,018,750
489,500 1,223,750 35 18" 0.002 1.524 40%
LINE 1 - DCPS:
STL 860,270 2,150,675
J 112,400 281,000
K 114,700 286,750
I 109,200 273,000
E 46,000 115,000
F 380,000 950,000
D 82,000 205,000
B 407,500 1,018,750
C 92,800 232,000
G 358,250 895,625
A 132,700 331,750
H 263,300 658,250
2,959,120 7,397,800 128 30" 0.0031 7.407 50%
W. K. DICKSON Page 2 9/5/96

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3ri
ENGINEERING
201 AMENDMENT
FLOWS CHANGES FLOWS
(GPD) (GPD) (GPD)
a. Existing Residential 242,900 242,900
b. Existing Commercial 63,500 63,500
c. Existing Industrial 109,700 (40,000) 69,700
d. Non-Excessive Ill 191,900 10,400 202,300
e. Residential Growth 96,040 96,040
f. Commercial Growth 20,580 20,580
g. Unspecified Industrial Growth 46,110 (8,510) 37,600
h. Specified Industrial Growth 280,000 (180,000) 100,000
i. Planned Residential Growth Outside Stanley 97,650 (70,000) 27,650
TOTAL: 1,148,380 (288,110) 860,270

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OPTION 3: PS FLOW SIZING CRITERIA:
DESIGN
ADF @ PEAK @
0.5 MGD 0.5 MGD 2.5 Peak Factor
LINE 1 - DCPS:
STL 500,000 1,250,000
J 112,400 281,000
K 111,900 279,750
I 109,200 273,000
E 46,000 115,000
F 380,000 950,000
D 82,000 205,000
B 407,500 1,018,750
C 92,800 232,000
G 145,000 362,500
A 135,000 337,500
H 263,300 658,250
2,385,100 5,962,750
4,141 GPM
W. K. DICKSON Page 1 7/22/96

a
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C-
M TABLE 2a
STANLEY WWTP SEWER INTERCONNECT TOTALS:
N CURRENT 20-YR CURRENT 20-YR CURRENT 20-YR
FLOWS DESIGN TOTAL FLOWS DESIGN TOTAL FLOWS DESIGN TOTAL
Residential 206,900 31,500 238,400 36,000 92,190 128,190 242,900 123,690 366,590
Commercial 58,970 1,830 60,800 4,530 18,750 23,280 63,500 20,580 84,080
Industrial 21,100 28,700 49,800 48,600 108,900 157,500 69,700 137,600 207,300
Non-Excessive I/I 57,900 I 87,100 145,000 18,000 39,300 57,300 75,900 126,400 202,300 0.185455
344,870 I 149,130 I 494,000 107,130 I 259,140 I 366,270 452,000 1408,270 1860,270
Residential 242,900 96,040 27,650 366,590 WALK 32,600
Commercial 63,500 20,580 84,080 QUEEN 2,500
Industrial 69,700 37,600 100,000 207,300 RUBB 12,000
Non-Excessive I/I 202,300 202,300 NIA 1,500
48,600

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JUL 18 '98 J34:05PM FLYGT GA PUMP /Za ,(,4), P•2
F -1
T PERFORMANCE CURVE a- '3')
DATE PROJECT ISSUE PROD
1996-07-18 , STANLEYNT. HOLLY P. STA. 4 C 3231 705
NO. OF TOT.MOM.OF .
BLADES..._.. 2 INERTIA,,... 2.84 KGM= POLES: 6 FREQ: 60 HZ CURVE NO
VOLTAGE_.... 46o v 63--655
THROUGHLET-.- 102T102 SPEED 1180 RPM POWER MOTOR SrlAFr 89 KW IMPJiLLER DIAMETER
CIRC. STARTING 435 MJN
- TO110Uu.._,.. 590 NM —
1!1_LOAD 3/4-LOAD 1/2,-LOAD MAX MOTORTYPE
TO:taus__ 1275 NM 43-,31-6FC/ 1
MOTOR cos FI 0.87 0.87 0.82 RATED CEARTYPE RATIO
MOTOR EFFICIENCY 91.096 92.096 92.5% uuRRExr...._ 142 A
STARTIGEAR EFFICIENCY - CURRENT_.,._ 590 A
POWER - -
(kW)
60 - ,
g. 50
40
/f
30 i -
DUD' POP1TS: FLOW (U5gpn) H AD(m EFF. (%) NPSI-1(t() GUARANTEE
HEAD I sago 106.0 (�.fl) 746 13.9 ML I A NPSH
z �� re
(ft) J (ft) EFF.
160 (%3
150 - y. .
rT�-
140 - ` 55 -
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4
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0 40 NO CONTINUO . OPERA ON 5 -.-
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0 1000 2000 3000 4000 USgpm
U CURVES SHOW PERFORMANCE WITH CLEAR WATER FLOW
• : PULP EFFICIENCY/SHAFT POWER jN
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TRIAL: 3D
Ig -9�
C= 140 C = 140 —�-
1000 FT 7,990 FT 33 0/ -›(
18 " PIPE 12 " PIPE 3
A B C
14 " PIPE DESIGN FLOW 4150
7,990 FT C-FACTOR 140
ASSUME HL= 3 FT C= 120 LINE SIZE 18
HEAD LOSS 4.28
12 " PIPE: Q= 0.560 MGD
14 " PIPE: Q= 0.720 MGD STATIC HEAD 50
1.280 MGD FRICTION HEAD 58
TDH 108
0.000241
EQUIVALENT LENGTH =:
18 " PIPE: C= 140 B-C= 12,455 LF
PS-B= 1,123 LF
13,578 LF
Flow(GPM) 4150
C-Factor 140
Pipe Size(in) 18
Velocity (fps) 5.23
V2/2g 0.081
Ft of Pipe 1000
Entrance Loss 1
Exit Loss 1
Enter#90's 2
Tee(str) 0
Tee(turn) 0
Check Valve 1
Gate Valve (open) 1
Plug Valve(open) 0
Loss 4.81
Total Loss:
HAZEN-WILLIAMS FORMULA:
DESIGN FLOW(GPM) 4150
C-FACTOR 140
LINE SIZE (IN) 18
VELOCITY(fps) 5.23
V2/2G 0.081
HEAD LOSS/ 1,000 FT 4.28
LENGTH OF LINE 1000
TOTAL HEAD LOSS 4.28

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14-Jun-96
03:45 PM
DESIGN FLOW 4,150 gpm
C-FACTOR 140
LINE SIZE (IN) 18
5.23
LINE: FORCE MAIN 0.081
EQUIVALENT LT OF PIPE= 13,578 4.28
STATIC HEAD - MIN 0 0 0
- MAX 610 560 50
TOTAL HEAD (TDH)
MIN 0
MAX 108
tiO1SPEOM::Irv»>< �:'#':�'�'�1 >< <` �: `< s>>`> C� ':.i.,:..:>><?
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0 0.00 0.00 0 50 0 50
500 0.08 1.15 0 50 0 51
1,000 0.31 4.16 0 50 0 54
1,500 0.65 8.82 0 50 0 59
2,000 1.11 15.03 0 50 0 65
2,500 1.67 22.72 0 50 0 73
3,000 2.35 31.85 0 50 0 82
3,500 3.12 42.37 0 50 0 92
4,000 4.00 54.26 0 50 0 104
4,500 4.97 67.48 0 50 0 117
5,000 6.04 82.02 0 50 0 132
4,150 4.28 58.09 0 50 0 108
Flow (GPM) 4,150 2,075 DUTCHMAN CREEK PUMP STATION - OPTION III
C-Factor 140 FORCE MAIN N-7990 E N-1000
Pipe Size (in) 2 3 4 6 8 12 14 18
Velocity (fps) 423.66 188.29 105.91 47.07 26.48 5.88 4.32 5.23
V2/2g 6.585 2.927 1.646 0.732 0.412 0.091 0.067 0.081
Ft of Pipe 0 0 0 0 0 7,990 7,990 1,000
Entrance Loss 0 0 0 0 0 0 0 1
Exit Loss 0 0 0 0 0 0 0 1
Enter # 90's 0 0 0 0 0 0 0 2
Tee (str) 0 0 0 0 0 0 0 0
Tee(turn) 0 0 0 0 0 0 0 0
Check Valve 0 0 0 0 0 0 0 1
Gate Valve (open) 0 0 0 0 0 0 0 1
Plug Valve (open) 0 0 0 0 0 0 0 0
Loss 0.00 0.00 0.00 0.00 0.00 246.27 154.64 4.81
Total Loss: 405.71

36" 042
32
HAZEN-WILLIAMS FORMULA:
DESIGN FLOW (GPM) 4,150 4,150 4,150 4,150 4,150 4,150 4,150 4,150
C-FACTOR 140 140 140 140 140 140 120 140
LINE SIZE (IN) 2 3 4 6 8 12 14 18
VELOCITY (fps) 423.66 188.29 105.91 47.07 26.48 11.77 8.65 5.23
V2/2G 6.585 2.927 1.646 0.732 0.412 0.183 0.134 0.081
HEAD LOSS / 1,000 FT ######## 26370.23 6495.55 901.54 222.07 30.82 19.35 4.28
LENGTH OF LINE 0 0 0 0 0 7,990 7,990 1,000
TOTAL HEAD LOSS 0.00 0.00 0.00 0.00 0.00 246.27 154.64 4.28

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NC .;.r. :-'-'. (- '
I REC . I V,r,,. 7,
AUG 2 1996 [AUG 26 1996
DIVISION OF F.V!F :, hi Aii ilEMENT (131i3TRUCTiON GRA% s S LOAN:, a , tie4
DEM-ETP,IR
MOSIESRLE ilELWI. OFFICE
ENGINEERING AMENDMENT
TO THE
TOWN OF STANLEY
201 FACILITIES PLAN
prepared for
TOWN OF STANLEY
114 South Main Street
Stanley, North Carolina 28164
By
W. K. DICKSON & COMPANY, INC.
1924 Cleveland Avenue
Charlotte, North Carolina 28203
MAY 1996
(Revised August 1996)
...,.,t.,:.,
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WK
DICKSON August 22, 1996
Mr. Jay B. Lucas, P.E., Supervisor
Facilities Evaluation Unit
nN.C. DEHNR, Division of Environmental Management
P. O. Box 29579
Engineers Raleigh, North Carolina 27626-0579
Planners
Surveyors
Re: Town of Stanley
Revised Engineering Amendment to the
201 Facilities Plan, Project No. E-SBF-T-95-0R20
WKD # 96451.10 I
Dear Mr. Lucas:
The following includes revisions to the 201 Facilities Plan (dated May 1996)
prepared for the Town of Stanley. Changes are shown in bold Italic print. The
selected 201 alternative recommended expanding the Town's wastewater
treatment plant to 1.0 MGD to handle future capacity needs.
The Town of Stanley and the City of Mount Holly in March 1996 entered into an
intermunicipal agreement for Mount Holly to treat a portion of Stanley's
wastewater at Mount Holly's treatment plant on the Catawba River. This will
allow Stanley to reduce flow at their treatment facility and not expand the
capacity of the plant.
The agreement calls for Stanley to purchase 0.500 MGD of treatment capacity at
the Mount Holly facility and construct a sewer interconnect between the two
sewer systems to convey wastewater from Stanley to Mount Holly for treatment.
The Town will also make several needed improvements at their wastewater
treatment plant as a part of this engineering amendment.
201 AMENDMENT CHANGES
The following 201 Amendment changes, dated May 1996, are included for the
Town of Stanley:
1924 Cleveland Avenue OtherOffues Atlanta,GA
Charlotte North Carolina 28203 Asheville.NC
Hickory,NC
704 334-5348 Raleigh.NC
FAX [phone] Columhia,SC

Wastewater Treatment Plant (VWVfP):
1. NPDES Permit Flow. The Stanley Wastewater Treatment Plant flow
capacity will remain 0.500 million gallons per day (MGD). The following
improvements are planned and are included in the 201 Amendment:
2. Aerobic Digester. A new aerobic digester (64 ft diameter with an 18 ft.
side water depth) will be provided to replace the existing unit. The
digester will provide stabilization and storage of sludge for 90 (plus) days
at a 2% solids. Additional storage can be done in the existing sludge
holding basin.
3. Aeration & Mixing. Replace the aeration basin aerators with two 25-hp
floating aerators. Move the two existing 20-hp aerators to the sludge
holding basin and provide four 20-hp flow directional mixers in the sludge
holding basin. Any three of the 20-hp mixers will provide the mixing
requirements with the fourth mixer used as backup. One of the
existing 20-hp aerators will be available for backup should one of the
25-hp floating aerator be out of service.
4. Dechlorination Facilities. A sulfur Dioxide gaseous dechlorination system
will be provide for the 0.5 MGD treatment capacity. Two 100 lbs/day
feeders with accessory equipment and alarms will be provided. Piping
and valve modifications will be made to the existing chlorine contact basin
to segregate the basin into two separate basins.
5. Standby Power. Standby power for the plant, excluding auxiliary lighting
or sludge treatment facilities will be added as required for dischargers to
WS waters.
6. Influent Screening and Flow Measurina. Replacement equipment for the
mechanical bar screen and flow measurement of the influent flows will be
provided.
7. Mechanical Bar Screening. Replace the existing mechanical bar screen
with a new unit.
The WWTP upgrade will include modifications where possible to resolve
short-circuiting problems in the final clarifiers identified by DEM staff.
Estimated project cost of making the WWTP improvements is $1,312,500 (see
Table 1). The estimate includes cost of construction, engineering and project
contingencies. The estimate of engineering services also includes cost to date
by the Town ($216,500) to expand the existing treatment plant.
3

TABLE 1
WASTEWATER TREATMENT PLANT PROJECT COST
Construction:
Mechanical Bar Screening 40,000
Influent Flow Measuring 8,000
Site Work 135,000
Aerators 35,000
Scum Removal Pumping 16,000
Sludge Meters 8,000
Aerobic Digester & Sludge Handling 475,000
Chlorination/Dechlorination 130,000
Structure Repairs 50,000
Standby Power 50.000
Total Construction $947,000
Engineering Services:
Design & Survey Mapping 50,000
Construction Services 4,000
Engineering Services for 1.0 MGD Expansion 216.500
Total Engineering Services $270,500
Project Contingencies: $95.000
Total Project Cost: $1,312,500
Mount Holly/Stanley Sewer Interconnect:
A new connecting outfall line is to be built between the Town of Stanley (Town)
and the City of Mount Holly (City) to convey a portion of the Town's wastewater
to the City's treatment plant for treatment. The improvements will include a new
sewage pumping station, replacing two existing pumping station in the City's
system. The upgrades will be sized for all of the Town's existing and twenty year
projected flow plus existing and projected flows tributary to the new outfall in the
Mount Holly system. The Town has entered into an agreement with the City to
purchase 0.5 MGD of treatment capacity at the City's 4.0 MGD treatment plant
located east of Mount Holly on the Catawba River. A copy of the agreement
between the two municipalities is attached to the engineering amendment. The
agreement has provisions for future additional treatment capacity purchase by
the Town upon approval of both parties.
4

s '
REVISED PROJECT DESCRIPTION
The Town operates a 500,000 gallon per day (GPD) wastewater treatment plant
(WVVfP) located at the end of Lola Street northwest of the Town. The treatment
plant is an activated sludge process, discharging treated effluent to Mauney
Creek.
Stanley will continue to treat most of its wastewater at the Town's treatment
plant. The sewer interconnect will be built to the industrial areas along Highway
27 east of Stanley and will serve both industrial and residential areas. The
outfall will be built to accommodate future extensions to pick up other areas of
the Town's service area in the future. Long range all of the Town's wastewater
could be discharged to the Mount Holly system with the Town's existing
treatment plant retired or eliminated. It is the Town's plan to continue to operate
the existing plant for some time into the future until either it is feasible to treat
their wastewater at Mount Holly or future discharge limits to Mauney Creek make
the discharge no longer feasible.
Stanley's flow projections for the twenty-year planning period are revised to
0.860 MGD from a previously identified need of 1.148 MGD. This change
reflects changes in industrial discharges effected by pretreatment and reuse of
process water and a reduction in planned residential growth in areas adjacent to
the Town's service area. This treatment capacity need can be met with the
existing treatment capacity (0.5 MGD) and the purchased treatment capacity
from Mount Holly (0.5 MGD). Table 2 (Revised) shows flow projection changes
for the Town. Table 2a shows how the projected Stanley flows will be split
between the Stanley WWTP and the sewer interconnect line to Mount Holly.
TABLE 2
TOWN OF STANLEY
FLOW PROJECTIONS
(Revised)
Engineering
201 Amendment
Flows Changes Flows
(GPD) (GPD) (GPD)
a). Existing Residential 242,900 242,900
b). Existing Commercial 63,500 63,500
c). Existing Industrial 109,700 (40,000) 69,700
d). Non-Excessive Ill 191,900 10,400 202,300
e). Residential Growth 96,040 96,040
f). Commercial Growth 20,580 20,580
g). Unspecified Industrial Growth 46,110 (8,510) 37,600
5

TABLE 2 (Continued)
h). Specified Industrial Growth 280,000 (180,000) 100,000
I). Planned Residential Growth 97.650 (70.000) 27.650
Total: 1,148,380 (288,110) 860,270
TABLE 2a
FLOW SPLITS for
STANLEY FLOW PROJECTIONS
STANLEY SEWER LINE
WWTP TO MT HOLLY TOTAL
(GPD) (GPD) (GPD)
Residential 238,400 128,190 366,590
Commercial 60,800 23,280 84,080
Industrial 49,800 157,500 207,300
Non-Excessive III 145.000 57,300 202.300
Total: 494,000 366,270 860,270
The flow will be split in such a manner as to not overload the Stanley
WWTP. A service area map in included defining service areas for the
Stanley and Mount Holly WWTP's. Flow projections for the Stanley WWTP
show a need for 0.494 MGD of treatment capacity after interconnecting with
the Mount Holly system. The total 20-year projected flow to the Mount
Holly WWTP, including the 0.5 MGD of treatment capacity for Stanley, is 5.9
MGD. Flows at the Mount Holly WWTP currently average 2.7 MGD. Current
treatment capacity is 4.0 MGD.
The interconnect outfall will be sized for the Town of Stanley's total projected
flow for a 20-year design. The interconnect sewers are sized for the total
average daily flow(ADF) so the pipe will flow approximately 1/2 full at the
design loading. The sewer sizing was evaluated to verify the sizing will
carry the Peak flow(with a 2.5 peaking factor). The sizing criteria was
reviewed with the Town of Stanley and the City of Mount Holly. The new
outfall and pumping station will include the following. A map is included
identifying force mains, sewers, meter vault, location, diameter and length
of each line segment:
6

—tr—
STANLEY11‘, '
■!. . 1111. .. TO TOWN OF STANLEY
low
� V , STANLEY SERVICE AREA�` A
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EXISTING
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EXISTING PUMP ���� ry /', ,�/
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-s % r,';i j iq,v: SANITARY SEWER AND
�` tg /i•, .j/ /t,Y 4- FORCEMAIN
/"/"ire//r/
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Litilit--:_ra%dillf•JW",
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SCALE IN FEET . 'o�,//%w<Oj-/x'"'�""//
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TABLE 3
SEWER INTERCONNECT
BASIS OF DESIGN
(Revised)
LINE OUTFALL DESIGN % of DEPTH
SEGMENT SIZE LENGTH AVG. DAILY FLOW @ PEAK FLOW
6 - 5 8" 3,931 LF 0.124 MGD 62%
3 - 4 18" 14,216 LF 0.973 MGD 92%
2 - 3 12" 4,628 LF 0.385 MGD 25%
E2 - 2 15" 550 LF 0.426 MGD 66%
2- 1 27" 4,163 LF 1.860 MGD 73%
El - 1 A 15" 428 LF 0.398 MGD 53%
1B - 1A 18" 35 LF 0.489 MGD 40%
lA - 1 21" 315LF 0.888MGD 48%
1 - DCPS 30" 128 LF 2.745 MGD 56%
Peak Flows are 2.5 times ADF
LINE FORCE MAIN
SEGMENT SIZE LENGTH PUMPING RATE
DCPS - El 18" 850 LF 4,150 GPM
E1 - F1 12" 6,950 LF 4,150 GPM
14" 7,750 LF(Existing FM)
Fl - WWTP 14" 240 LF(Existing FM) 4,150 GPM
PUMPING STATION: 4,150 GPM @ 103 FT TDH
3 - 120 HP PUMPS
TABLE 4
SEWER INTERCONNECT
PROJECT COST
(Revised)
CONSTRUCTION:
30"Sanitary Sewer(128 LF) 16,300
27"Sanitary Sewer(4,163 LF) 477,700
21"Sanitary Sewer(315 LF) 28,100
18"Sanitary Sewer(14,251 LF) 1,090,200
15" Sanitary Sewer(978 LF) 62,400
12"Sanitary Sewer(4,628 LF) 236,000
7

TABLE 4 (Continued)
8"Sanitary Sewer(3,931 LF) 133,700
18"Force Main (850 LF) 32,600
12"Force Main (6,950 LF) 177,600
Sewer Meter 50,000
Dutchman Creek Pump Station 562,000
Total Construction: $2,866,600
Engineering Services:
Design & Survey Mapping 202,800
Construction Services 132.900
Total Engineering Services $335,700
Legal, Administrative & ROW $65,000
Project Contingencies: $145.000
Total Project Cost: $3,412,300
Total estimated project cost of the sewer interconnect is $3.412 million.
Combined with the WWTP improvement project cost($1.323 million), the
combined cost is $4.735 million. The projects will be funded by a State
bond loan, Gaston County and excess funds available from a Town general
obligation bond(GO Bond). The Town's loan application for$3.0985
million was approved by the Local Government Commission and the loan
offer and acceptance documents have been sent to the Town. Projected
funding is available as follows:
State Bond Loan $3.0985 million
Gaston County $2.800 million (see note)
Town GO Bond $0.700 million
Note: The County has agreed to fund the project with 10 annual payments
($280,000/year) over the next 10-years. Excess funds (over the $4.686
million projected cost) will be used by the Town to purchase treatment
plant capacity at the Mount Holly WWTP when the plant is expanded.
Expansion is projected to occur within 4 to 6 years.
JUSTIFICATION
The Stanley treatment plant is currently operating at 92% of its rated treatment
capacity. NCDEM regulations require Stanley to increase the capacity to meet
future capacity, detail specific measures to achieve waste flow reductions or
8

TOWN OF STANLEY
PROPOSED
OUTFALL SIZE
8" 0.124 MGD A.D.F.
(3,931 LF) -PO-
EXISTING 8" OUTFALL
0 Q EXISTING PUMP STATION
• TO BE ABANDONED
0
EXISTING PUMP STATION
TO BE ABANDONED PROPOSED
OUTFALL SIZE
18" 0.973 MGD A.D.F.
(14,216 LE)
MASTER SEWER METER
7 EXIST. 15" OUTFALL
PRQP. 12" PARALLEL SEWER
12' PARALLEL SEWER
0.385 MGD A.D.F.
EXISTING WOODLAWN PUMP STATION (4,628 LF)
TO BE ABANDONED
(IP 0 PROPOSED
OUTFALL SIZE
A
27" 1.860 MGD A.D.F.
EXIST. 15" 0.426 MGD (4,163 LF)
PROPOSED DUTCHMAN'S
CREEK PUMP STATION
EXIST. 18" SS SEE ENLARGED PLAN
EXISTING DUTCHMAN'S CREEK PUMP STATION -•
TO BE ABANDONED
EXISTING 14" FM
PROP. PARALLEL 12" FM
(6,950 LF)
/
■
MT. HOLLY WWTP
CITY OF MT. HOLLY
SEWER INTERCONNECT (SCHEMATIC)
WK
Pao ne�rs DICKSON W1c0E r.DWG 96451.10 AUG. 1996
S�yo. SCH

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(PROP. 27"4,163 LF) SS \\\ \ / /
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IN
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PUMP STATION (DCPS)
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\ \
\�'P_ \
\ . PROP. 18" FM \
I \ PROP.28Lf)(1PROP. 21 \ \
\\>30" SS \\
(315LF)PROP. 18 \ \(35 LF) \ \ \
IEXISTING 18" Sa �APP! DEPRESS SER\ I.P.• TMfO REi UIRF ) \
\
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EXISTING 18" TO BE REMOVED \\,,, `
BRIDGE /
I (428 PROP.LF�"1 SS
\ /
PROP. 18" FORCE MAIN e
I (850 LT)
'CJ
EXISTING DUTCHMAN'S CREEK 14 I
PUMP STATION TO BE ABANDONDED 1
IEXISTING 14" FORCE MAIN TO REMAIN
t '—
EAST CHARLOTTE AVE. "
NC H . 27 ® � F -------- — _— —— — --
I Li — ___—._._ —
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PROP. 12" FORCE MAIN
I a (6 950 LF)LLY WWTP
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ENLARGED PLAN
i (SEE SEWER INTERCONNECT SCHEMATIC)
lir WK
En9�neers DICKSON WKD # 96451.10 AUG. 1996
Planers
Surveyors SCHEM.DWG
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develop alternative plans to reduce flow at the treatment plant. Estimated cost to
expand the treatment plant is $3,006,400. Waste flow reduction is not
achievable in a growing economy. Stanley has chosen to reduce flow at the
treatment plant with an intergovernmental agreement with Mount Holly to treat up
to 0.5 MGD of wastewater. It is advantageous for Stanley to purchase
wastewater treatment capacity from Mount Holly in lieu of expanding their own
facility. It is increasingly uneconomical for the Town to operate its own
wastewater treatment facilities. Consolidation of these activities with the City of
Mount Holly is not only financially sound, but furthers regional concepts of
consolidation of small wastewater discharges into larger regional facilities,
reducing the total number of discharges. The sewer interconnect option offers
the Town the option to purchase additional treatment capacity at Mount Holly in
the future. This option is a hedge against future treatment regulation changes
which are increasingly difficult for small treatment operations like Stanley to
comply. The estimated project cost of the sewer interconnect with Mount Holly,
including outfalls and pumping station is $3,412,300.
The sewer interconnect offers the additional advantage of eliminating four
existing sewage pumping stations, two in the Stanley system and two in the
Mount Holly system. The wastewater in Stanley is currently pumped two to three
times before reaching the treatment plant. With the sewer interconnect the
wastewater will be handled by gravity. The sewer interconnect will reduce the
amount of wastewater to be handled at the Town's West Chestnut Street
pumping station which now is a major pumping station in the system and
experiences overloads during peak flow periods. In the Mount Holly system, the
interconnect project will replace two older pumping stations in their system with
one larger pumping station.
COST EFFECTIVENESS:
Stanley WWTP. Treatment at the Stanley WWTP would require expansion of
the treatment plant and advanced level of treatment required to discharge at the
larger flows into a low flow stream.
Sewer Interconnect. Three sewer interconnect options were evaluated. All three
options conveys wastewater by gravity sewer between Stanley near Highway 27
to the Mount Holly system. Option I requires two new pumping stations in the
Mount Holly system to replace two older stations. The existing Woodlawn
Avenue pump station and Dutchman Creek pump station would be replaced.
Option II requires construction of a new pump station near the existing Dutchman
Creek pump station near NC-273 Bypass bridge. The existing Woodlawn
Avenue pump station would be rebuilt with larger pumps and a new force main
9

•
across Dutchman Creek to a new gravity sewer. The existing Dutchman Creek
pump station would be abandoned.
Option Ill requires a new pump station on the northeast bank of Dutchman Creek
near Alsace Mill. The existing Woodlawn Avenue pump station and Dutchman
Creek pump station would be abandoned. Projected construction cost of the
three options are:
Option I $2,866,600
Option II $2,934,100
Option Ill $2,817,400
Option III was found to have the least present worth cost of all three
options. The present worth analysis were made using a discount rate of
7.75% and associated compound interest factors.
TABLE 5
PRESENT WORTH ANALYSIS
OF OPTIONS
OPTION I OPTION II OPTION III
Construction $2,871,400 $2,934,100 $2,866,600
Engineering 335,700 335,700 335,700
Legal, Admin. & R/W 65,000 65,000 65,000
Project Contingencies 145.000 145,000 145,000
Total Project Cost:$3,417,100 $3,479,800 $3,417,100
Annual Operating Cost:
Pumping Station $53,800 $33,900 $32,400
Pipe Lines 8.500 8,500 8.500
Total: $62,300 $42,400 $40,900
Present Worth ...
of Annual Cost $623,700 $424,500 $409,500
Total PW $4,040,800 $3,904,300 $3,772,900
Both the no-action and Stanley WWTP expansion alternatives were rejected for
economic reasons and treatment capacity needs. Option Ill was selected as the
sewer interconnect alternative for economic reasons. Option Ill is less expensive
to build and operating one pumping station require less maintenance and
operation cost over Options I and II.
10

USER FEES
Sewer revenue needs upon initial start-up will be $917,400 per year or $76,450
per month. Currently, 35 percent of the Town's sewer revenues come from its
residential customers. Assuming this pattern continues, the monthly sewer
revenues which must be generated from residential customers would be:
$76,450/month x 35% = $26,663/month
Based on current population projections, there should be approximately 1,060
residential accounts at start-up. Monthly sewer cost for a residential user would
be:
$26,663/month / 1,060 customers = $25.24/month
The Town's sewer user charge for FY 1996/1997 is $7.50 for the first 3,000
gallons plus $3.50 for each additional thousand gallons of usage.
Therefore, the current sewer user charge for a residential customer using
5,000 gallons per month is $14.50 per month. When the Town must provide
their share of the cost for the future Mount Holly WWTP expansion in FY
2002/2003, residential sewer user fees (for 5,000 gallons of usage) are
projected to increase to $24.05 per month. This rate projection reflects an
average annual increase in revenue needs of 3% for the period plus
increased cost for the WWTP expansion debt payments and Mount Holly
user charges for treating the Town's wastewater.
The anticipated schedule for the Mount Holly WWTP expansion start-up is
FY 2002/2003.
ENVIRONMENTAL CORRIDOR
An Environmental Assessment, prepared by Robert J. Goldstein & Associates,
Inc., is attached to the end of this report.
INTERMUNICIPAL AGREEMENTS
The two municipalities have entered into an intermunicipal agreement for the
sewer interconnect project. A copy of the agreement is attached to the end of
this report. A letter from the Town of Stanley(dated August 20, 1996 from
Mr. Gary E. Parker, Town Manager) is included to explain elements of the
intermunicipal agreement. A copy of Exhibit A, section 4 on page 2, is also
included.
TOWN RESOLUTION A copy of the Resolution is attached.
11

RESOLUTION CONCERNING AMENDMENT OF
201 FACILITIES PLAN
TOWN OF STANLEY
WHEREAS, The Town of Stanley has cooperated in the conduct of a 201
Facilities planning Study; and
WHEREAS, An engineering Amendment to the Town of Stanley 201 Facilities
Plan has been prepared, dated May 1996.
NOW, THEREFORE, BE IT RESOLVED THAT the Board of Commissioners of
the Town of Stanley endorses the plan amendments as proposed.
This the I c '± day of , 1996.
By:
Gal R. Brot erton, Mayor
(Clerk)

MAYOR `C:otun of $stafl1n TOWN MANAGER
Gail R. Brotherton Gary E. Parker
ESTABLISHED NOVEMBER 14, 1855
COUNCIL „ POLICE CHIEF
��� �t`f�`
Margaret S.Green y �IaCz Donald R. Davis
Eugene G.Thompson
George T. Moore FIRE CHIEF
C. Deward Bentley M. Anthony Ballard
Claude G. Lutz
August 21. 1996
Mr . Jay B. Lucas . P.E. , Supervisor
Facilities Evaluation Unit
N.C. DEHNR. Division of Environmental Management
P.O. Box 29579
Raleigh. North Carolina 27626-0579
Re: Town of Stanley Engineering Amendment
to 201 Facilities Plan
Project No. E-SBF-T-95-0R20
Dear Mr . Lucas :
I am writing in reference to the June 28 , 1996 review
comments to the Engineering Amendment prepared by W. K. Dickson.
Item 16 evokes several issues relative to the agreement between
the Town of Stanley and The City of Mount Holly which I wish to
explain.
The Town and the City have an agreement whereby the Town
will provide 100% of the financing of the interconnect project
and the City will prepare the plans and specifications and take
the lead to construct the interconnect facilities . This
arrangement was made with the realization that the majority of
the facilities will be located within the City' s service area and
the Town had prior arrangements for a State Loan through the
Construction Grants and Loans (CG&L) office. The Town has sole
responsibility for financing the project and through the
intermunicipal agreement will retain ownership of the outfall
until the State Loan is repaid.
Section 13 . on page 5 of the agreement , includes provision
for the Town to purchase 500, 000 gallons per day of capacity in
the expanded capacity of the City' s WWTP. The agreement for
200, 000 gpd of treatment capacity applies only until the City' s
plant is expanded or until the Town requests additional treatment
capacity at the Mount Holly facility.
We are aware the overall project costs included in the
• intermunicipal agreement are estimates of probable cost and are
subject to change until the project is bid and construction
contracts are executed. The latest estimates of project costs ,
included in the August 1996 revisions . are $3 . 417 million for the
sewer interconnect and $1 . 323 million for the proposed
improvements at the Town' s wastewater treatment plant .
P.O. BOX 279. 114 S. MAIN ST.•STANLEY, N. C.28164.704-263-4779•FAX [phone]

I will forward a draft copy of the interlocal sewer
interconnect agreement with Gaston County as requested. We will
send a final copy after the County completes their budget
planning work.
We feel the intermunicipal agreement addresses the comments
in your June 28. 1996 letter and does not require revision by the
two municipalities . The Town also gave the CG&L office draft
copies of the agreement for review prior to adoption by the
Stanley and Mount Holly Boards . The CG&L office made no comments
at that time. Therefore, the two municipalities proceeded with
adopting the agreement with the understanding the CG&L office was
in agreement with the content of the agreement . Please let me
know if these comments sufficiently answer your questions .
Sincerely,
TOWN OF STANLEY
c �(
Gary Parker .
Town anager
cc: Mr . Phillip G. Ponder , Jr . , City Manager
GEP/jc

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ENVIRONMENTAL ASSESSMENT
STANLEY to MOUNT HOLLY
WASTEWATER INTERCONNECTOR
GASTON COUNTY, NORTH CAROLINA
RJG&A Project No. 9617
16 MAY 1996
Report To:
Mr. Cecil Madden
N.C. Division of Environmental Management
Construction Grants Section -- P.O. Box 29535
Raleigh, North Carolina 27626
and
W.K. Dickson & Co., Inc.
1924 Cleveland Avenue
Charlotte, North Carolina 28203
[phone]
Robert J. Goldstein & Associates, Inc.
•
ENVIRONMENTAL CONSULTANTS
8480 Garvey Drive
Raleigh, North Carolina 27604-3175
Tel [phone]
Fax [phone]

TABLE OF CONTENTS
1.0. PROPOSED PROJECT 1
2.0. PURPOSE AND NEED FOR THE PROJECT 1
3.0. EXISTING ENVIRONMENT 1
3.1. Geology and Soils. 1
3.2. Existing Land Use. 2
3.3. Water Resources. 2
3.4. Jurisdictional Wetlands. 2
3.5. Fish and Aquatic Habitats 3
3.6. Wildlife and Terrestrial Habitats 3
4.0. ALTERNATIVES ANALYSIS 3
4.1. No-Action Alternative. 3
4.2. Stanley WWTP. 4
4.3. Stanley to Mount Holly Interconnector. 4
4.4. Selection of the Preferred Alternative. 4
5.0. ENVIRONMENTAL CONSEQUENCES 5
5.1. Land Use Changes 5
5.2. Prime and Unique Farmland 5
5.3. Public, Scenic, and Recreational Lands 5
5.4. Archaeological and Historical Resources 6
5.5. Air Quality 6
5.6. Noise Levels 6
5.7. Groundwater Resources 6
5.8. Surface Water Resources 6
5.9. Introduction of Toxic Substances 7
5.10. Eutrophication of Receiving Waters 7
5.11 . Jurisdictional Wetlands 7
5.12. Fish and Aquatic Habitats 8
5.13. Wildlife and Terrestrial Habitats 8
5.14. Rare and Protected Species. 8
6.0. MITIGATIVE MEASURES 9
7.0. LITERATURE CITED 10

TABLES AND FIGURES
Table 1. Land Use and Habitat Types in the Project Construction Corridor. 11
Table 2. Rare and Protected Species Known from Gaston County 12
Figure 1. Stanley to Mount Holly Wastewater Interconnector,
Project Location Map. 13
Figure 2a. Project Corridor and Jurisdictional Wetlands 14
Figure 2b. Project Corridor and Jurisdictional Wetlands. 15
Figure 2c. Project Corridor and Jurisdictional Wetlands 16
Figure 2d. Project Corridor and Jurisdictional Wetlands. 1 7

•
1.0. PROPOSED PROJECT.
The Town of Stanley proposes to construct a wastewater collection and pumping
system along South Stanley Creek and Dutchmans Creek in northeastern Gaston County,
North Carolina (Figure 1). The project will connect the Stanley sewer system with the Mount
Holly system, and the wastewater will be treated and discharged at the Mount Holly WWTP
on the Catawba River.
The proposed facilities include a 2.7 MGD pump station located adjacent to Alsace Mill
between Alsace Street and Dutchmans Creek in Mount Holly, 27,300 feet of gravity sewer
from four existing pump stations to the proposed Alsace Mill pump station, and 1,400 feet
of force main paralleling the lowermost (southeastern) portion of the gravity sewer. The
existing pump stations (Dutchmans Creek, Woodlawn Avenue, Twin Brooks Drive, and
Jackson Park) will be abandoned. The proposed force main will discharge to an existing force
main at the intersection of NC-27 and NC-273 Bypass (Figures 2a-d).
2.0. PURPOSE AND NEED FOR THE PROJECT.
The Town of Stanley wishes to direct industrial, commercial, and residential
development along NC-27 southeast of town. The existing Stanley WWTP (0.5 MGD) on
Mauney Creek is in a separate drainage basin and would require significant pumping costs.
Future expansion of Stanley's WWTP capacity is constrained by the high cost of treatment
required by the state to discharge into a small stream.
Stanley purchased an agreement from Mount Holly to provide 0.5 MGD of wastewater
treatment at Mount Holly's 4.0 MGD WWTP on the Catawba River. The Mount Holly WWTP
is better suited for accommodating future expansion than the Stanley WWTP.
The project will also serve western Mount Holly and allow both municipalities to
provide sewer service to the extraterritorial land between them. The project will ultimately
accommodate a wastewater flow of 2.7 MGD, provided that sufficient WWTP capacity is
made available.
3.0. EXISTING ENVIRONMENT.
3.1. Geology and Soils.
The project area is in the Charlotte Belt of the Piedmont physiographic province, with
a prevalence of metamorphosed quartz diorite, granitic rock, and felsic metavolcanic rock
(N.C. Division of Land Resources, 1985). Elevations range from 740 feet above mean sea
level at the Jackson Park pump station southeast of Stanley to 580 feet on Dutchmans Creek
in Mount Holly.
The prevalent soils are Chewacla loam, Helena sandy loam, Winnsboro loam, Wilkes
loam, Gaston sandy clay loam, and Pacolet sandy loam (Woody, 1989).
1

3.2. Existing Land Use.
The proposed Alsace Mill pump station will be located above the 100-year flood
elevation in a grassed area adjacent to Alsace Mill. Of the 27,300 feet of proposed sewerline
corridor, 17% is forest edge adjacent to existing dirt roads or utility lines, 53% is unbroken
forest, 16% is-shrub and sapling thicket, 13% is paved or grassed, and 1% comprises stream
crossings. Habitat types are described in detail in section 3.6 and Table 1.
The proposed wastewater service area beyond the Mount Holly city limits are sparsely
developed.
3.3. Water Resources.
Surface waters include Dutchmans Creek, its tributary South Stanley Creek, and an
unnamed tributary of South Stanley Creek,in the Catawba River(Lake Wylie) watershed. The
stream banks are forested along most segments. South Stanley Creek and its tributary have
mixed sand, gravel, cobble, and bedrock substrata, with numerous riffles. Dutchmans Creek
has a flatter gradient and a predominantly sandy bottom, with few riffles. All streams in the
project area are classified WS-IV by the N.C. Division of Environmental Management (DEM).
The WS-IV Critical Area for Lake Wylie begins on Dutchmans Creek immediately upstream of
NC-273 Bypass, which is the downstream end of the project area.
Groundwater aquifers in the project area are classified as MIF (Metaigneous Felsic) and
Mil (Metaigneous Intermediate), with average well yields of 18 to 19 gallons per minute
(Daniel & Payne, 1990).
3.4. Jurisdictional Wetlands.
RJG&A ecologists Gerald Pottern and Patrick McMillan delineated jurisdictional
wetlands in the project corridor during April and May, 1996, using the 1987 COE Wetlands
Delineation Manual (Environmental Laboratory, 1987)and supplementary technical criteria for
hydrophytic vegetation, hydric soils, and hydrology indicators.
Twelve jurisdictional wetlands were located along South Stanley Creek upstream of
SR 1923 and its unnamed tributary (Figures 2b-d). The drainage basin area of South Stanley
Creek at the SR 1923 bridge is 4.38 square miles, and the wetlands upstream of this point
are headwater wetlands. No wetlands were encountered along Dutchmans Creek or the lower
portion of South Stanley Creek.
Eleven of the twelve wetlands are forested floodplain depression wetlands, with
canopies containing green ash, river birch, water oak, shagbark hickory, American elm,
sweetgum, sycamore, and red maple. The understory shrubs include saplings of the canopy
species, musclewood, Chinese privet, spicebush, silky dogwood, tag alder, elderberry, black
willow, winterberry, arrowwood, and box elder. Dominant vines and herbs include common
greenbrier, poison ivy, Virginia creeper, blackberry,sedges,soft rush, false nettle,jewelweed,
coneflower, turtlehead, cane, horsetail, sensitive fern, and southern lady fern.
2

•
The twelfth and lowermost wetland (F) is a marsh created by impoundment of an
intermittent stream for erosion control adjacent to a quarry. It supports shrub and vine
thickets containing tag alder, elderberry, black willow, buttonbush, swamp rose, and
blackberry; and an herb layer of Japanese grass,wingstem,thoroughworts, sedges,soft rush,
arrowhead, cattail, spikerush, and jewelweed.
3.5. Fish and Aquatic Habitats.
Fishes were sampled on 17 April 1996 with a 10-foot long, 3/16-inch mesh seine. The
dominant fish species in South Stanley Creek at SR 1923 were sandbar shiner, redlip shiner,
yellowfin shiner, greenhead shiner, rosyside dace, bluehead chub, striped jumprock,speckled
killifish, redbreast sunfish, and tesselated darter.
Dominant fishes in Dutchmans Creek upstream of Main Street included sandbar shiner,
spottail shiner,fieryblack shiner,whitefin shiner,bluehead chub,largemouth bass,white bass,
bluegill, redbreast sunfish, gizzard shad, Piedmont darter, and seagreen darter.
3.6. Wildlife and Terrestrial Habitats.
Floodplain and upland forested habitats in the project area are categorized below by
the N.C. Natural Heritage Program (NHP) community classification system (Schafale and
Weakley, 1990).
The floodplain forests consist of Levee Forest on well drained sand adjacent to
Dutchmans Creek and the lower half of South Stanley Creek, Bottomland Forest on poorly
drained silty soils behind levees, and Alluvial Forest along smaller streams where no levee has
formed. Dominant canopy trees in floodplain forests include the species listed in floodplain
depression wetlands in section 3.4, plus those less tolerant of prolonged saturation such as
bladdernut, carrionflower, southern sugar maple, and flowering dogwood.
Upland forests consist of Mesic Mixed Hardwood Forest on moist acidic slopes, Basic
Mesic Hardwood Forest on basic or mafic moist slopes, and Dry-Mesic Oak/Hickory Forest on
drier slopes and upland ridges. The mesic forests are dominated by beech, northern red oak,
water oak, southern sugar maple, red maple, sweetgum, tulip poplar, shagbark hickory,
mockernut hickory, silverbell, and bigleaf magnolia. The basic forest supports a greater
abundance and diversity of herbaceous species than does the acidic type. The dry-mesic
forest contains primarily white oak, southern red oak, scarlet oak, sourwood, and various
hickories, and a sparse herb layer.
4.0. ALTERNATIVES ANALYSIS.
4.1 . No-Action Alternative.
The no-action alternative would constrain development along NC-27 between Stanley
and Mount Holly to low density uses that can dispose of wastewater through septic systems.
This condition is undesirable for economic reasons, and the high failure rate of such systems.
3

4.2. Stanley WWTP.
Treatment at the Stanley WWTP would require WWTP expansion, excessive pumping
costs, and advanced level of treatment required for discharging large volumes of wastewater
into a stream with very low flow,as discussed in Section 2.0. This option was rejected as the
most expensive build alternative.
4.3. Stanley to Mount Holly Interconnector.
Three Stanley to Mount Holly wastewater interconnector alternatives were evaluated.
All include a new gravity sewer from the Jackson Park pump station southeast of Stanley to
the confluence of Dutchmans Creek and Taylor Creek in Mount Holly, and allow the existing
Dutchmans Creek, Jackson Creek, and Twin Brooks pump stations to be abandoned.
Option I requires construction of two new pump stations; one on the northeast bank
of Dutchmans Creek at its confluence with Taylor Creek, and one on the southwest bank of
Dutchmans Creek 400 feet west of the NC-273 Bypass bridge. The existing Woodlawn
Avenue pump station and Dutchmans Creek pump station would be abandoned.
Option II requires construction of a new pump station on the southwest bank of
Dutchmans Creek 400 feet west of the NC-273 Bypass bridge. The existing Woodlawn
Avenue pump station would be retained, and a new force main built across Dutchmans Creek
connecting it to the new gravity sewer along the northeast bank. The existing Dutchmans
Creek pump station would be abandoned.
Option Ill requires construction of a new pump station on the northeast bank of
Dutchmans Creek near Alsace Mill. The existing Woodlawn Avenue pump station and
Dutchmans Creek pump station would be abandoned.
A gravity sewer alignment adjacent to the existing sewer along the southwest bank
of Dutchmans Creek was considered, but determined impractical due to steep slopes, bedrock,
and the greater trench depth required.
4.4. Selection of the Preferred Alternative.
Both the no-action and Stanley WWTP expansion alternatives were rejected for
economic reasons.
Of the Stanley to Mount Holly interconnector alternatives, option Ill was selected as
the preferred alternative. It requires two new crossings of Dutchmans Creek, one new pump
station, and eliminates four existing pump stations. Options I and II require maintenance of
two pump stations, and option II also requires an additional Dutchmans Creek crossing.
Option I includes a force main, rather than gravity sewer, from the mouth of Taylor
Creek to the lower end of the project, and would allow preservation of a wider forested buffer
along Dutchmans Creek. The project engineers determined that the environmental benefits of
a wider buffer do not justify the higher construction and maintenance costs or the increased
risk of blockage or mechanical failure at the two new pump stations.
4

5.0. ENVIRONMENTAL CONSEQUENCES.
5.1. Land Use Changes.
Based on a 40-foot wide construction corridor, the project will disturb 25 acres,
including 16 acres of forest. The remaining acreage is previously disturbed land including road
and utility rights-of-way, lawns, pasture, old fields, and cutover land. A 20-foot wide
permanent access corridor will be maintained by periodic mowing.
Secondary and cumulative impacts of induced urban growth may affect land use
throughout the South Stanley Creek and Taylor Creek watersheds. The major changes will
be along NC-27 between Stanley and Mount Holly, where industrial park development is under
way. The DEM-mandated local watershed protection ordinances (Stanley, Mount Holly, and
Gaston County) will regulate the density and types of new development in those areas within
WS-IV watersheds, as discussed in section 5.8.
5.2. Prime and Unique Farmland.
Most of the project corridor is either frequently flooded or too steep to qualify as prime
farmland. Chewacla loam is a prime farmland soil only where it is drained and protected from
flooding or not frequently flooded during the growing season. Chewacla loam is the most
abundant soil mapped in the project corridor, but there are no flood control dams in or
upstream of the project area.
Helena sandy loam and Winnsboro loam are prime farmland soils where they occur on
slopes less than 8 percent, including a 2,500 foot segment between the Jackson Park pump
station and NC-27, and a few small areas along South Stanley Creek. None of these areas
was in cultivation during the field reconnaissance (April to May, 1996).
Following construction, areas of prime farmland soils will continue to be suitable for
agriculture except for the small areas occupied by manholes. Loss of prime farmland soils to
induced urban development in the wastewater service area is likely to occur. The rate and
geographic distribution of such loss will depend on social and economic factors, and cannot
be predicted.
•
5.3. Public, Scenic, and Recreational Lands.
A ball field and playground on the north bank of South Stanley Creek east of SR 1923
is the only dedicated public recreational area in the project corridor. Use of this facility will
be interrupted during construction, but no long-term impacts are expected.
Dutchmans Creek is a popular bank fishing stream for largemouth bass, redbreast
sunfish, catfish, and white bass during their spring spawning migration, according to local
anglers. The segment most heavily fished extends from the Main Street bridge in Mount Holly
to the mouth of Dutchmans Creek. Fishing access from Main Street to NC-273 Bypass may
be temporarily interrupted during construction, but no long-term direct impacts of the project
are anticipated. Induced urban growth, however, may adversely affect fish habitat and public
access to Dutchmans Creek, as discussed in section 5.12.
5

5.4. Archaeological and Historical Resources.
No archaeological or historical inventory of the project corridor has been conducted.
The State Historic Preservation Office, N.C. Department of Cultural Resources,will determine
whether further information is required.
5.5. Air Quality.
An increase in airborne particulates and exhaust emissions from construction vehicles
will occur during construction, but the public health impacts of these emissions will be
negligible. No operational air quality impacts of the project are anticipated. The wastewater
pump station will be located 200 feet or more from the nearest residence.
Induced urban growth will result in increased air pollutant emissions from vehicles and
certain industrial activities. Gaston County has exceeded EPA threshold criteria for air
pollutants during previous years, and requires annual emission testing of gasoline fueled
vehicles.
5.6. Noise Levels.
Residents adjacent to the project corridor may experience nuisance noise levels during
construction, which will be limited to daylight hours. Operational noise of the facility will be
negligible.
Induced urban growth will cause an increase in noise from vehicles and construction
activities. Residences along NC-27 are most likely to be affected.
5.7. Groundwater Resources.
The project area is almost entirely impervious, and all rainfall on the site is transported
through storm drains to surface streams. No impacts of the project on groundwater recharge
are anticipated.
5.8. Surface Water Resources.
Project construction will cause a temporary increase in turbidity and sediment load in
adjacent streams. These impacts will be minimized by employing standard erosion control
practices. An Erosion and Sedimentation Control Plan will be submitted to the DEHNR
Mooresville Regional Office for approval at least 30 days prior to construction.
No direct adverse operational impacts of the project on water quality are anticipated.
Impacts of the Mount Holly WWTP effluent on Lake Wylie are regulated by specific limits
established in the plant's NPDES discharge permit.
6

The project will deter new septic systems and reduce the number of existing ones in
the wastewater service area. Failing septic systems are a common source of surface water
pollution, especially in areas of clayey soils.
Induced urban growth may adversely affect surface water quality in several ways. An
increase in impervious surface area causes a corresponding increase in peak-stormflows,
exacerbating channel erosion. Base flows during dry weather are subsequently reduced,
causing small perennial streams to become intermittent,concentrating pollutants,and creating
high temperature and low-oxygen conditions. Destruction of riparian forests, culverts,
drainage improvements,and artificial channel stabilization may also contribute to water quality
degradation.
5.9. Introduction of Toxic Substances.
Potential sources of toxic substances during construction may include exhaust
emissions, oil, fuel, and other vehicle fluids. There are no known petroleum storage tanks or
facilities containing hazardous materials to be removed in the project area.
No releases of toxic substances are anticipated from operation of the project.
5.10. Eutrophication of Receiving Waters.
Nutrient loading to streams in the project area may temporarily increase due to soil
erosion during construction, but should be negligible provided that erosion control practices
are followed. In flowing streams, most sediment-associated nutrients remain bound to clay
particles where they contribute little to eutrophication. These nutrients generally become
bioavailable when they settle into the anaerobic hypolimnion of a seasonally stratified pond
or reservoir, such as Lake Wylie located one mile downstream of the project. Any additional
nutrient loading impacts from project construction will be negligible.
Nutrient loading from the Mount Holly WWTP is controlled by effluent limits specified
in the plant's NPDES discharge permit.
5.11 . Jurisdictional Wetlands and Waters.
The final alignment best avoids the twelve wetlands in the project area. Preliminary
calculations indicate that the unavoidable wetland area affected is less than one acre, pending
COE verification.
Following construction, wetlands will be restored to pre-construction grade, and the
permanent mowed access corridor limited to 10 feet wide. Anti-seep collars will be installed
per DEM specifications to prevent the gravel-filled trench from draining the wetlands.
Induced development will cause further loss and degradation of wetlands throughout
the project service area. The rate and distribution of such losses cannot be predicted.
7

•
5.12. Fish and Aquatic Habitats.
Fish and other aquatic organisms may be temporarily affected by elevated silt loading,
turbidity, and silt-associated pollutants during construction. Clearing of riparian forests along
segments where steep slopes or other design factors preclude the preservation of a wide
buffer may cause permanent changes in stream habitat and water quality, thereby affecting
fish populations.
Induced development may further degrade aquatic habitats as discussed in section 5.8.
5.13. Wildlife and Terrestrial Habitats.
Habitat types disturbed by project construction are summarized in Table 1. The natural
forested community types are described in section 3.6.
High quality mesic forests in the project area contain canopy trees averaging 25 to 35
inches diameter at breast height (dbh) and regionally rare species such as bigleaf magnolia
(Magnolia macrophylla), nodding trillium (Trillium rugelli) and yellow lady slipper (Cypripedium
pubescens). Three such high quality segments occur between wetland F and wetland L along
South Stanley Creek.
High quality alluvial forests in the project corridor, with 25 to 35 inch dbh canopy
trees, are located in two segments along Dutchmans Creek between Main Street and the
Woodlawn Avenue pump station.
The project will cause fragmentation of forests along 14,400 feet of corridor, and will
disturb forest edge habitat along an additional 4,600 feet. The mowed corridor may promote
the success of invasive exotic species such as Chinese privet and Japanese honeysuckle, and
may deter certain wildlife species that require tracts of unbroken forest.
Induced urban growth will cause further loss of natural communities. The rate and
geographic distribution of such loss will depend on social and economic factors, and cannot
be predicted.
5.14. Rare and Protected Species.
The N.C. Natural Heritage Program has records of eighteen rare plant or animal species
from Gaston County. Four of these are either federally protected (E or T), federal candidates
(C 1 or C2), or state protected (E, T, or SC) (Table 2).
For two of these species, the highfin carpsucker (Carpiodes velifer) and the bog turtle
(Clemmys muh/enbergii), there is no suitable habitat in the project area, and no adverse
impacts on these species are anticipated.
Suitable habitat for the loggerhead shrike (Lanius ludovicianus) occurs in fields and
pastures in the project area. No shrikes were detected during the field reconnaissance, and
the project will not significantly reduce suitable habitat.
8

•
Marginally suitable habitat for Georgia aster(Aster georgianus) occurs along the edges
of mesic-dry forests, including edges of road or utility rights-of-way. The field reconnaissance
was too early in the season to reliably detect and identify Georgia aster. If present in the
project area,construction may destroy some individuals, but will create additional forest edge
habitat suitable for the species. Therefore, no adverse net impact is anticipated.
One unprotected rare species was encountered, the bigleaf magnolia (Magnolia
macrophylla). A population of this tree occurs along a 3,500 foot segment of the project
corridor between the Twin Brooks pump station and the mesic slope adjacent to wetland J
(Figure 2c). The greatest density and largest specimens are in the 1,000 foot segment
immediately north of the Duke Power/Gastonia raw water line ROW. Approximately fifty 4-
to 15-inch dbh trees will be eliminated; saplings less than 4 inches dbh were not counted.
Fewer and smaller specimens occur on the opposite bank of South Stanley Creek, but the
project engineers determined that construction on this side may not be feasible due to the
greater trench depth required.
6.0. MITIGATIVE MEASURES.
The project engineers revised their preliminary sewer alignment following RJG&A's
delineation of jurisdictional wetlands, so that the final proposed design avoids and minimizes
wetland impacts to the extent practicable. Unavoidable impacts include disturbance of less
than 1.0 acre of headwater wetlands, pending COE verification, and can be permitted under
Section 404 Nationwide Permit 12 and its corresponding Section 401 General Water Quality
Certification. Compensatory mitigation is not likely to be required, provided that conditions
of the Nationwide Permit are met.
Impacts of induced development will in part be mitigated by municipal and county
water supply watershed protection ordinances. Other than the buffers required by these
ordinances, which restrict construction but do not require maintenance of natural vegetation,
no local program for riparian corridor protection exists.
9

•
7.0. LITERATURE CITED.
Woody, J.W. 1989. Soil survey of Gaston County, North Carolina. U.S.Department
of Agriculture, Soil Conservation Service, Raleigh, N.C. 118 p. + maps.
Daniel,-C.C. III and R.A. Payne. 1990. Hydrogeologic Unit Map of the Piedmont and
Blue Ridge Provinces of North Carolina. U.S. Geological Survey Water Resources
Investigations Report 90-4035. Raleigh, N.C. 1 p.
Environmental Laboratory. 1987. Corps of Engineers Wetlands Delineation Manual,
Technical Report Y-87-1 . U.S. Army Engineer Waterways Experiment Station, Vicksburg,
Miss. 100 pp. + appendices.
N.C. Division of Land Resources. 1985. Geologic map of North Carolina. N.C.
Department of Natural Resources and Community Development -Geological Survey, Raleigh,
N.C. 1 p.
Schafale, M.P. and A.S. Weakley. 1990. Classification of the Natural Communities of
North Carolina - Third Approximation. North Carolina Natural Heritage Program, Division of
Parks and Recreation, NC DEHNR, Raleigh, N.C., 325 pp.
10

Table 1. Land Use and Habitat Types in the Project Construction Corridor.
HABITAT TYPE LENGTH (feet)
Floodplain forests (Alluvial, Levee, and Bottomland Forest)
Edge — Adjacent to existing road or utility 1,300
Unbroken forest 9,000
Mesic Forests (Mesic Mixed Hardwood and Basic Mesic Hardwood)
Edge -- Adjacent to existing road or utility 1,400
Unbroken forest 5,400
Dry-Mesic Oak/Hickory Forest
Edge -- Adjacent to existing road or utility 1,900
Unbroken forest 0
Floodplain scrub (marsh, old field, saplings, wooded pasture) 3,500
Upland scrub (mesic to dry old field, saplings, wooded pasture) 900
Lawns, mowed fields, open pasture 2900
Roads, mowed utility right-of-way 800
Stream crossings 200
11

Table 2. Rare and Protected Species Known from Gaston County.
SCIENTIFIC AND STATE FED. STATE GLOBAL
COMMON NAME PROT. PROT. RANK RANK
Gaston
Vertebrates
CARPIODES VELIFER SC - S2 G4G5
HIGHFIN CARPSUCKER
CLEMMYS MUHLENBERGII T C2 S2 G3
BOG TURTLE
LANIUS LUDOVICIANUS LUDOVICIANUS SC 3C S3B,S3 G5T5
LOGGERHEAD SHRIKE
Invertebrates
AMBLYSCIRTES REVERSA SR - S3? G4
REVERSED ROADSIDE SKIPPER
AUTOCHTON CELLUS SR - S1S2 G4
GOLDEN-BANDED SKIPPER
ERYNNIS MARTIALIS SR - S3? G4
MOTTLED DUSKY WING
POLITES MYSTIC SR - SR G5
LONG DASH
Vascular plants
AMORPHA SCHWERINII SR - S3 G3
PIEDMONT INDIGO-BUSH
ASPLENIUM BRADLEYI C - SI G4
BRADLEY'S SPLEENWORT
ASTER GEORGIANUS C C2 S2 G2G3
GEORGIA ASTER
FOTHERGILLA MAJOR C - S2 G3
LARGE WITCH-ALDER
JUNIPERUS COMMUNIS VAR DEPRESSA C - Si GSTS
DWARF JUNIPER •
MAGNOLIA MACROPHYLLA SR - S1S2 G5
BIGLEAF MAGNOLIA
NESTRONIA UMBELLULA SR 3C S3 G4
NESTRONIA
QUERCUS ILICIFOLIA SR - Si G5
BEAR OAK •
QUERCUS PRINOIDES C - SH G5
DWARF CHINQUAPIN OAK
SMILAX BILTMOREANA C - S3 G3
BILTMORE CARRION-FLOWER
THERMOPSIS MOLLIS SENSU STRICTO SR - S2? G3G4
APPALACHIAN GOLDEN-BANNER
Natural communities
BASIC OAK—HICKORY FOREST - - S3 G4
DRY OAK—HICKORY FOREST - S4 G5
DRY-MESIC OAK—HICKORY FOREST - - S5 G5
GRANITIC FLATROCK - - S2 G3
LOW ELEVATION ROCKY SUMMIT - - S2 G2
NC NATURAL HERITAGE PROGRAM, NC DIVISION OF PARKS AND RECREATION,DEIINR FEBRUARY1995
Data compiled using BCD software developed by The Nature Conservancy.
12

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WASTEWATER INTERCONNECT AGREEMettiT
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NORTH CAROLINA WASTEWATER INTERCONNECT
AGREEMENT
GASTON COUNTY -
THIS AGREEMENT, Made and entered into this /,rt, day of
March , 1996 , by and between the CITY OF MOUNT 'FOLLY,
a municipal corporation having a charter granted by the State of
North Carolina, hereinafter referred to as the "City" ; and the
TOWN OF STANLEY, a municipal corporation having a charter granted
by the State of North Carolina, hereinafter referred to as the
"Town" ;
WITNESSETE:
WHEREAS , the Town wishes to assure itself of adequate wastewater
treatment capacity for present and future development by
utilizing a portion of the capacity of the present and
future wastewater facilities owned and operated by the City;
and,
WHEREAS , City has agreed to allocate to Town a portion of the
wastewater treatment capacity at City' s present or future
wastewater plants under the terms and conditions set forth
herein.
NOW, THEREFORE , in consideration of the terms, conditions, and
covenants hereinafter set forth herein, it is agreed between the
parties as follows:
_ . _UR?OS? . The ;u:7:cse c= this =cr dement _s to construc
san:Loar7 sewer in eroe , =_e—ins , and a' emu_ _chances ,
ng .wa': L _ _.. S:a-_e`% Creek __ _..zer•ccnnec_ _.._
:Jastewace_ s.%stens c= the munioica_i:ies , and co
_.^. �C_ eden` Nh`reby C ity Nl acoert and
a corz_on of :own+' = wastewater .
2. LEAD AGENCY: The City shall serve as lead agency for the
construction of the sewer interconnect project (hereinafter
referred to as "the Project" ) , and agrees to commence and
complete the Project within a reasonable time after
execution of this agreement, following the funding schedule
as established from time to time by the Project Engineer.
The schedule for the Project shall be established by the
project engineer and shall be approved by the
municipalities. The Town will have the right to inspect
documents, materials, papers and other related items at any
point during the Project, with proper notification to the
City, and the City shall have the project engineer provide
copies of all correspondence, reports, documents and ocher
related project materials to the Town.
3 . PROJECT ENGINEER : The municipalities approve the employment
of the engineering firm of W. K. Dickson, Inc . as project

•
engineer, and shall use said engineering firm or such other
firm as the parties may hereafter agree. The Project
Engineer selected by the parties must agree that engineering
costs are "ultimately borne by Town and that the Project
Engineer will not pursue reimbursement from City except to
the extent funds are provided to City from Town.
4. DESCRIPTION: The City agrees to construct or let contracts
for the construction of the following described facilities :
A. Sewer Lines of the approximate diameter and lineal
feet as shown on Exhibit A.
B. Master Meter: connection of the municipal sewer
systems will be through a master meter near Highway 27
at or near the Duke Power right-of-way, south of the
Twinbrook Industrial Park.
C. Pump Stations : additions and improvements will be
made to City' s existing wastewater pump stations
located on Woodlawn Avenue and on Dutchman' s Creek.
The pump stations will be enlarged and upgraded to
accept the additional flow from Town and from increased
needs in City' s service area. The approximate cost of
such work is shown on Exhibit A.
5 . DESIGN: The proposed sewer lines, pump station improvements
master meter, and appurtenances, shall be designed and
constructed in accordance with the specifications of the
municipalities . The project engineer shall be employed
through the City to complete the design and specifications
for the project and to conduct other related work necessary
for the successful completion of the project. Plans and
specifications shall be approved by the municipalities prior
to being let =or bid. The City shall provide to the Town a
cc_ v of the osn=c- ^r. _ar.s and a set of as-built clans
at the ocmt_=:icn .._ the ?_:jest. 3ids =o_ the _ _ CC., �, ___
not be awarded until reviewed and approved by both =arti_s .
6 . __NANC_NG .
A. The project cost for the aforementioned facilities is
estimated to be two million, eight hundred thousand seven
hundred ( $2, 800 ,700 .00 ) Dollars. The financing of the
Project is to be provided solely by the Town and is
contingent upon the Town obtaining the following agreements
pertaining to financing:
1) The interlocal sewer interconnect agreement to be
entered into by Gaston County and the Town.
2) Approval of the sewer interconnect by the North
Carolina Department of Environment, Health and Natural
Resources (NCDEHNR) Division of Environmental
Management.
3 ) Funding approval by the Construction Grants and
Loans Section of NCDEHNR Division of Environmental
Management.
B . City will not incur any expense regarding the design or
construction of the Project, until the Town has provided
2

satisfactory evidence to City chat Town has the availability
of funds necessary to complete the Project and reimburse
City for such expenses . During the performance of this
agreement, the City will submit monthly payment requests co-
the Town for reimbursement of eligible Project expenses,
which Town will reimburse within thirty ( 30) days of
receipt. All change orders will be approved by both
municipalities. Eligible Project expenses shall include
design services , rights-of-way expenses , legal fees, and
construction costs and other expenses reasonably necessary
to carry out the terms of this agreement. Design services
are to include preparing plans and specifications,
surveying, easement mapping, contract administration and
construction observation services.
7. CONSTRUCTION SCHEDULE AND INSPECTION: Due to the funding_ of
the Project, the Project will be developed according to the
following guidelines:
The City agrees to commence the Project within a reasonable
time after execution of this Agreement. The Project
schedule will be established by the Project Engineer and
shall be approved by the Town and the City. The Town has
bond funding which requires all money be spent and the
Project closed out by May 31, 1998 . The City will schedule
design, bidding and construction to complete all
construction by December 31, 1997.
8 . RIGHTS OF WAY: The City shall obtain all rights-of-way and
encroachment agreements as necessary for that portion of the
Project to be constructed east of the location of the Master
Meter, and Town shall obtain all such rights-of-way and
encroachment agreements for that portion west of the
_ocatior. of :he : F...a.ter Meter .
Cyy'NE .S -- C.-=....:_.... . ND MA .'TrNA C---:
A. :ton ..�.....- c: _ -r r�r: of ....e ? ro_ec_ , as Cer-: _ ar`
the Project Engineer , Town shall own, operate and maintain
that portion of the Project lying west of the Master Meter.
All other portions of the Project and appurtenances thereto
including the Master Meter and pump stations shall be owned,
operated, and maintained by City. Notwithstanding the
foregoing, however, if Town shall obtain funding which
requires Town to retain ownership of the sewer .outfall line,
then it is agreed that Town shall have ownership of said
outfall line, which would otherwise belong to City, and
shall lease the same to City for One ($1 . 00 ) Dollar per year
. until such time as Town may convey ownership of the same to
' City without violating the terms of its funding. The
aforesaid sewer line will then be conveyed to City without
charge.
B. City shall have the exclusive right to allow sewer taps
into that portion of the sewer outfall line belonging to
City or leased by City from Town. Town shall have the
exclusive right to allow sewer taps into that portion of the
sewer outfall line belonging to Town and not leased to City,
- 3

subject, however, to the service area limitations set forth
in Paragraph 10 below.
C. If either municipality shall hereafter annex a water or
sewer customer then being served by the other municipality,
then such annexing municipality must provide for such water
and/or sewer service through its own facilities ( i . e. , sewer
lines, pump stations ) within one (1 ) year of the eff —= vn
date of such annexation.
10 . WASTEWATER SERVICE AREA: It is agreed that wastewater
passing through the master meter to be treated by the City
shall only contain wastewater originating from sources
within the resent or future corporate limits of the Town,
the present or future extraterritorial zoning jurisdiction
of the Town, and those sources presently served by the Town
located outside bcth the present corporate and
extraterritorial zoning jurisdiction of the Town. The Town
agrees that at no time will it provide sewer service to any
areas except those listed in this paragraph 10 if such
service should generate wastewater flowing through the
Master Meter to the City' s wastewater treatment facility,
without prior written consent of City.
11. WASTEWATER TREATMENT: City presently utilizes approximately
65% of the treatment capacity at its existing wastewater
treatment facility. City agrees chat it will make available
to Town under the terms of this agreement sufficient
capacity at its present wastewater treatment plant to treat
up to 200 ,000 gallons per day of wastewater from the Town.
City further agrees not to unreasonably deny to Town
additional treatment capacity within its current wastewater
treatment+ silt, _rcvidad chat such additional :vaszewa=-
does not jec ar -i__ ' s capacity cc orcv_oe ser i _c_ -_
its then a li st_.nc 59r7 Town agreestc ca7 -o
City' s present ==," 1 - _y a
ecual __ City' s inside sewer rate as may Ca
established tv City from time co time . This rate stall
continue in effect until changed as hereinafter set forth.
The City will provide meter readings to Town on or about the
first day of each month f.lr the preceding month ' s usage, and
Town will pay to the City its sewer charges within 15 days
of the receipt of such billing. Any late payment not
received 15 days of said billing will carry a. 1-1/2% late
payment charge.
12 . FUTURE EXPANSION OF CITY'S TREATMENT FACILITY: City' s
current facility was completed in 1976 .. Advances in
wastewater treatment technology, additional treatment
requirements proposed by the State, and increased demand are
all factors to be considered by City regarding a future
upgrade and expansion ( hereafter referred to as "U&E" ) of
its wastewater facility. The City proposes to expand and
upgrade its facility when any of the following events occur:
1. The flow capacity of the facility reaches 90% of
its capacity;

2. The City' s NPDES permit limits require an upgrade;
3 . At such other time as the City may deem it
appropriate.
Such a U&E would include but not be limited to chose
improvements set forth in a facilities study entitled
"Wastewater Treatment Plan Expansion Study" , performed by W.
K . Dickson, Engineers, dated January 1995 , a copy of which
is retained by both parties .
13 . PARTICIPATION BY TOWN UPON U&E OF CITY'S TREATMENT FACILITY:
In consideration of the mutual agreements contained herein,
the City agrees to include in the U&E . 5 million gallons (or
such greater amount as Town may request prior to preliminary
design) of hydraulic capacity and a proportionate .share of
the U&E treatment capacity (i.e. , capacity to treat BOD,
TSS, nutrients, and other regulated constituents ) for use by
Town, and Town agrees to accept and pay for the same under
the terms and conditions hereinafter set forth.
A. City will notify Town in writing at such time as
City desires to begin engineering design for the U&E of
its wastewater treatment plant.
B. The portion of the U&E cost to be paid by Town
will be equal to the product of the entire U&E cost
multiplied by a fraction, the numerator of which is . 5
million gallons per day (or such greater volume of
capacity as Town may timely elect) , and the denominator
of which is equal to the increased treatment capacity
of the U&E ( as compared to City' s present capacity per
day at its ;resent treatmentfacility) expressed _n
mill .. cacns 'tee- day. By way
C_ -..: ua: cost .vCu_.. to 2 • .. ..
acC0r f_nC to the f cCwing exam pie :
( .'&E cost ) C_JM x O ^GD ( reserve for Town ) =
2 . 0 ?!GD ( increased cap . )
C. The Town shall pay to the . City the pro-raca share
of each installment as the installments come due on
City' s bond indebtedness incurred to construct the U&E.
By way of illustration, if the U&E cost is $10 million
and Town' s portion of these costs is $2. 5 million, Town
would pay to City twenty-five percent of each
installment. If City should pay off the bond issue
early, Town shall nevertheless continue to make
installments according to the initial amortization
schedule, unless the parties shall agree to a different
amortization. Town may, however, pay off their portion
of the indebtedness ac any earlier date as Town may
elect.
D. Town' s rate for wastewater treatment by City shall
be reduced from 125% of City' s inside rate as the same
may be changed from time to time to 100% of the City's
— - - 5

inside rate beginning on the first day of the utility
billing cycle immediately following Town' s first
payment to City of its portion of City' s bond payment
or at such time as the U&E is completed and in use,
- - whichever shall occur first. Thereafter, Town' s rate
shall continue to be 100% of the City' s inside rate as
the same may be from time to time established until
such tine as Town has paid City for its portion of the
plant U&E thereafter the Town' s rate for sewer
treatment by City will be 125% of the rate charged to
City' s inside customers as the same may be from time to
time established. In the event that Town should be in
default of its obligation to pay its pro-rata share of
each installment of the bond indebtedness, then Town' s
rate during such default shall be increased to 125% of
City' s inside rate, and City may, in addition, pursue
such legal recourse as may be available to enforce the
terms of this agreement.
E. The parties expressly agree that Town will be
paving a fractional amount as set forth above based
upon the entire cost of the U&E and not solely the
additional costs of including into the U&E Town' s
reserved capacity. It is for this reason that the
Town' s sewer rats charged by the City is decreased
until such time as Town has paid for its portion of the
Plant U&E.
14 . TERM OF AGREEMENT: This agreement shall continue for a term
of forty ( 40 ) years from and after the date of the execution
hereof.
15 . SEWER USE REGULATIONS: Town agrees that it will keep in
force at all Limes and enforce a Sewer Use Ordinance
- .-.roved •V`� -..e S 'a e c= Nor' h Card ina. This c:fi Dance
VLv - � -
.Vculd t= he lame o- si7ilar to ..ha:. i.. -fir.- •I_-.. . =.
ty c= _•Icu r 'c --' ?It all times during this _ -=_
Cr w ill r sewer use :e=mi t to Town =n ace..- ..a..:s
wLtn the C __i
' use= :ewer ordinance and recu'7 =:' :n:
recur r_ments ac may ce promulgated gated from tine to t_e
State of North Carolina Department of Environment, Health
and Natural Resources (DEHNR) for significant industrial
users as defined by the DEHNR. During the term of this
Agreement, at Town' s election, City will administer Town' s
pretreatment program pertaining to those industries
discharging sewer through the Master Meter to be treated by
City. Town will reimburse City the reasonable cost
associated with administering Town' s pretreament program.
Town agrees to submit to the City all applications for
industrial discharges which pass through the master meter to
be treated by the City. No industrial discharge permits will
be issued by Town until reviewed and approved by City. The
City will review and approve or disapprove permits and, if
necessary, perform a headworks analysis to determine the
City' s ability to treat such wastewater within Town' s
remaining reserved capacity. City will approve such permits
6

•
if Town then has sufficient remaining treatment capacity
within its reserve. The City will approve such permit on
the same basis as it apuroves similar applications for
permits by industrial users within the City of Mount Holly,
taking in consideration the proportionate amount of the
wastewater treatment capacity reserved by the City for the
Town both relating to its current wastewater facility and
any upgraded or expanded facility. City will not violate
the provisions of this paragraph for any purpose including
the purpose of inducing industries to locate within City.
16 . TOWN' S FUTURE SEWER NEEDS : At such future date as Town's
wastewater flow based on a yearly average exceeds 80% of the
capacity purchased by Town in the U&E, then Town should
undertake negotiations for additional treatment capacity.
City will take in consideration any unused plant. -capacity
then present within the U&E and the needs of City, Town, and
any other parties sharing such capacity. City will
thereupon allocate to Town such unused capacity as City may
elect in its sole discretion. The rate for such additional
capacity shall be negotiated between the parties . If such
unused capacity is not sufficient to provide Town with sewer
treatment commensurate with its demand, then City agrees to
construct additional capacity at its wastewater facility
prior to Town' s usage exceeding 90% of its reserved capacity
in the U&E, provided that Town bear all expense relating to
an additional U&E for Town' s benefit.
IN WITNESS WHEREOF, the parties hereto have caused this
Agreement to be signed by their duly authorized representatives
the day and year first above written.
CITY OF ' CUNT HOLLY
./c
_ rank 7 . McLean, :1. -C-
`_--es
CPj;4.0/2,
at.41
Cit Clerk
( seal )
TOWN OF STANLEY
By: -`, jaQ 4►4/Z
ail R. therton, Ma or
Attest:
6-6/076gL -
City Clerk
(seal )
K#203
7

Exk6;+ A
REGIONAL SYSTEM -TREAT HWY 27 INDUSTRIAL AREA Ca3 MT HOLLY WWTP:
1. STANLEY WWTP IMPROVEMENTS:
Sludge Facilities(Required to meet 503 Sludge Rules) 583,000
Dechlorination 45,000
Standby Power 85,000
Misc. Items 100,000
Estimated Construction Cost: $813,000
Engineering, Legal &Admin. Cost: 50,000
Supplemental Construction Observation: 4,000
Contingencies:. 48,000
Subtotal: $915,000
Engineering Cost to Date to expand WWTP to 1.0 MGD: 216,500
Total Project Cost: $1,131,500
2. SEWER INTERCONNECT WITH MT HOLLY:
Mt Holly System Improvements:
21" SS 1,104,000
18" SS 102,000
15" SS 136,000
•
18" FM 13,500
Woodlawn Ave PS 325,000
Dutchman Ck PS 350,000
Interconnect Meter 50,000
Stanley System Improvements:
8" SS 164,000
Estimated Construction Cost: $2,244,500
Engineering, Legal &Admin. Cost: 322,000
Contingencies: 246,200
Total Project Cost: $2,812,700
3. MT HOLLY TREATMENT CAPACITY COST:
0.5 MGD Treatment Capacity @ Mt Holly $2,520,000
AVAILABLE STATE FUNDING: •
State Bonds: Approved Funding: $3,098,500
• Potential Funding: 500,000
Total: $3,598,500

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STANLEY WASTEWATER TREATMENT PLANT PEAK FLOWS
JAN 1994 MAR 1994 MAY 1994
PEAK AVG PEAK PEAK AVG PEAK PEAK AVG PEAK
HR DAY FACTOR HR DAY FACTOR HR DAY FACTOR
DAY
1 0.600 0.480 1.25 0.500 0.344 1.45 0.425 0.421 1.01
2 0.550 0.384 . 1.43 1.375 0.943 1.46 0.500 0.451 1.11
3 0.625 0.405 1.54 1.300 1.267 1.03 0.550 0.417 1.32
4 1.200 1.105 1.09 0.600 0.482 1.24 0.675 0.561 1.20
5 0.750 0.745 1.01 0.500 0.377 1.33 0.525 0.398 1.32
6 0.700 0.569 1.23 0.525 0.390 1.35 0.600 0.392 1.53
7 0.700 0.506 1.38 0.500 0.354 1.41 0.525 0.406 1.29
8 0.750 0.549 1.37 0.600 0.356 1.69 0.475 0.415 1.14
9 0.575 0.418 1.38 0.600 0.349 1.72 0.500 0.395 1.27
10 0.475 0.459 1.03 0.750 0.643 1.17 0.475 0.446 1.07
11 0.425 0.389 1.09 0.625 0.520 1.20 0.450 0.397 1.13
12 1.125 0.668 1.68 0.625 0.476 1.31 0.475 0.432 1.10
13 0.375 0.610 0.61 0.550 0.477 1.15 0.425 0.388 1.10
14 0.625 0.411 1.52 0.650 0.387 1.68 0.550 0.457 1.20
15 0.500 0.464 1.08 0.600 0.464 1.29 0.425 0.350 1.21
16 0.450 0.445 1.01 0.600 0.427 1.41 0.450 . 0.437 1.03
17 0.750 0.321 2.34 0.575 0.467 1.23 0.450 ' 0.400 1.13
18 0.600 0.567 1.06 0.625 0.361 1.73 0.500 0.434 1.15
19 0.500 0.411 1.22 0.575 0.453 1.27 0.525 0.384 1.37
20 0.475 0.348 1.36 0.600 0.477 1.26 0.500 0.377 1.33
21 0.475 0.375 1.27 0.600 0.470 1.28 0.475 0.459 1.03
22 0.425 0.355 1.20 0.750 0.456 1.64 0.450 0.401 1.12
23 0.500 0.467 1.07 0.625 0.432 1.45 0.525 0.429 1.22
24 0.400 0.347 1.15 0.625 0.468 1.34 0.450 0.452 1.00
25 0.450 0.393 1.15 0.575 0.476 1.21 0.500 0.406 1.23
26 0.550 0.424 1.30 0.575 0.376 1.53 0.525 0.437 1.20
27 0.500 0.403 1.24 0.750 0.454 1.65 0.500 0.454 1.10
28 1.000 0.591 1.69 0.750 0.621 1.21 0.425 0.387 1.10
29 0.500 0.437 1.14 1.300 1.242 1.05 0.375 0.353 1.06
30 0.450 0.436 1.03 0.750 0.650 1.15 0.475 0.462 1.03
31 0.425 0.381 1.12 0.650 0.497 1.31 0.475 0.365 1.30
AVG 0.479 AVG 0.521 AVG ' 0.418
PEAK = 1.259 PEAK = 1.361 PEAK = 1.174
Page 1

0, 21
•
STANLEY WASTEWATER TREATMENT PLANT PEAK FLOWS
JULY 1994 SEP 1994
PEAK AVG PEAK PEAK AVG PEAK
HR DAY FACTOR HR DAY FACTOR
DAY
1 0.475 0.456 1.04 0.650 0.514 1.26
2 0.450 0.431 1.04 0.625 0.582 1.07
3 0.650 0.432 1.50 0.650 0.449 1.45
4 0.550 0.428 1.29 0.475 0.444 1.07
5 0.375 0.332 1.13 0.625 0.462 1.35
6 0.550 0.271 2.03 0.400 0.296 1.35
7 0.500 0.436 1.15 0.750 0.438 1.71
8 0.375 0.339 1.11 0.750 0.491 1.53
9 0.475 0.384 1.24 0.700 0.499 1.40
10 0.475 0.425 1.12 0.525 0.455 1.15
11 0.500 0.449 1.11 0.450 0.415 1.08
12 0.375 0.329 1.14 0.800 0.470 1.70
13 0.375 0.354 1.06 0.475 0.413 1.15
14 0.500 0.382 1.31 0.450 0.419 1.07
15 0.550 0.372 1.48 0.700 0.478 1.46
16 0.525 0.497 1.06 0.450 0.446 1.01
17 0.500 0.435 1.15 0.500 0.457 1.09
18 0.500 0.310 1.61 0.525 0.456 1.15
19 0.625 0.406 1.54 0.500 0.485 1.03
20 0.625 0.439 1.42 0.475 0.450 1.06
21 0.550 0.489 1.12 0.550 0.367 1.50
22 0.475 0.404 1.18 0.400 0.376 1.06
23 0.650 0.435 1.49 0.500 0.414 1.21
24 0.550 0.441 1.25 0.575 0.347 1.66
25 0.500 0.487 1.03 0.750 0.707 1.06
26 0.375 0.361 1.04 0.500 0.388 1.29
27 0.425 0.485 0.88 0.475 0.439 1.08
28 0.450 0.445 1.01 0.500 0.436 1.15
29 0.500 0.429 1.17 0.550 0.447 1.23
30 0.475 0.385 1.23 0.500 0.442 1.13
31 0.475 0.497 0.96
AVG 0.412 AVG 0.449
PEAK = 1.222 PEAK = 1.251 1.254
- Page 2_ -- -

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FLUIDYNE JET AERATION 6ALOULATIONS
PROJECT: Jet Aeration-Aerobic Digester
Location: Stanley, North Carolina
DATE &TIME: April 25, 1996
INFLUENT CONDITIONS PI#1
Site Elevation (in feet) 500
Lbs of Dry Solids Per Day 9?, -for��-
Lbs of 02/LB of VSS 1.42
Actual Oxygen Demand (lb 02/d)Total -443e- I 32q
Alpha 0.7
Beta 0.95
Theta 1.024
Operating Dissolved oxygen (mg/I) 2
Clean Water oxygen sat. at op.temp(mg/I) 9.09
Clean Water oxygen sat. at std. temp(mg/I) 9.09
Clean water 02 sat, std temp,mid depth(mg/1) 11.50
Std. condition ambiant pressure (psia) 14.7
Oper. condition ambiant pressure (psia) 14.6
Wastewater temperature (c) 20
SOR/AOR ratio 1.86
Standard Oxygen Demand (lb 02/d)total 2109
Standard Oxygen Demand (lb 02/nr) 117
Pounds of oxygen/pound of air 0.23
Clean water efficency (%) 23
•
Pounds of air/cubic foot of air 0.075
Aeration hours per day 18
Air flow rate (scfm) 492
Air pressure losses(lines and nozzle) 0.7
Maximum air pressure (psig) 7.63
No. of Tanks 1
No. of Headers 1
Diameter(ft) 64
Top of Wall(ft) 20
Top water level (ft) 18
Tank Volume kmgd)._._ ______„____.__ ....,. �.9.433

/8 ot 21
Page 2
PROJECT: Jet Aeration-Aerobic Digester
EQUIPMENT SELECTION 35
Air flow per nozzle (scfm)
Number of nozzles required 14.06
Number of nozzles provided
Actual airflow per nozzle (scfm) 30.76
Number of nozzles per header 16.00
Blower capagt provided (scfmlper header 560
POWER CONSUMPTION CALCULATIONS 0 9 ll� S S 1/
Electric motor efficiency
Pump efficiency 0.7
Blower efficiency 0.57 1 .q a 1.4
Pump horsepower, BHP/header 8
Total Blower horsepower, BHP 25 7 t?1owc2

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sc7/ 24
OUTFALL BASIS OF DESIGN (2.5 Peak Factor-ADF @ Pipe 1/2 Full)
OPTION 3: DESIGN RATIO
2.5 PF LINE or MIN CAP d/D
DESIGN ADF PEAK LENGTH SIZE SLOPE 1/2 FULL @ PEAK
LINE 6 -5:
123,800 309,500 3,931 8" 0.004 0.248 62%
LINE 3 - 4:
STL 860,270 2,150,675
J 112,400 281,000
972,670 2,431,675 14,216 18" 0.0012 1.180 103%
LINE 2 - 3:
STL 860,270 2,150,675
J 112,400 281,000
K 114,700 286,750
I 109,200 273,000
1,196,570 2,991,425 4,628 12" 0.0022 0.542 25%
EXIST 15" 0.0015 0.812 50%
1.354
LINE E2 - 2:
F 380,000 950,000
E 46,000 115,000
426,000 1,065,000 550 15" 0.0015 0.812 66%
LINE 2 - 1:
STL 860,270 2,150,675
J 112,400 281,000
K 114,700 286,750
I 109,200 273,000
C 92,800 232,000
E 46,000 115,000
F 380,000 950,000
G 145,000 362,500
1,860,370 4,650,925 4,163 27 0.001 3.177 73%
LINE El - Al:
A 135,000 337,500
H 263,300 658,250
398,300 995,750 428 15" 0.002 0.937 53%
W. K. DICKSON Page 1 8/20/96

6 oil' el
LINE 1A - 1:
D 82,000 205,000
B 407,500 1,018,750
A 135,000 337,500
H 263,300 658,250
887,800 2,219,500 315 21" 0.002 2.298 48%
LINE 1 B - 1A:
D 82,000 205,000
B 407,500 1,018,750
489,500 1,223,750 35 18" 0.002 1.524 40%
LINE 1 - DCPS:
STL 860,270 2,150,675
112,400 281,000
K 111,900 279,750
I 109,200 273,000
E 46,000 115,000
F 380,000 950,000
D 82,000 205,000
B 407,500 1,018,750
C 92,800 232,000
G 145,000 362,500
A 135,000 337,500
H 263,300 658,250
2,745,370 6,863,425 128 36" 0.0021 4.838 56%
W. K. DICKSON Page 2 8/20/96

q(.04s/i /0 4
4--to-qco
Flock> PRoecnoes (see Ili-lackcd
AC.
0.5 people/
IL E)ctar ADF
z .x 0,5 x a 8(,e5 Z:15)
_L_ _44, scrizoO_E--) Pi)
_y .
ADF PLLç5OcPI
_ I,zs paop ie c_
I)]z<4_, _x .2G 0.e.) •( I a.) = 400 66).
Peak =-. 26 000 C-IP1)
= 1, 147 AC
0.45
0. LS \ 6, 8 )c___ 100 77
eSo -GPI)
x _ --
Pect(c j co (-7•Pi)
2.45 po_o_fle
- -
i 7 ° t5LO
_
I/ 4 700 wi)
Tx 2, 5
Peak = Z86_, 750 PO
•
_ Ift - -

itt
. •,„ c 64-El A
4 -to- c((.0
15 Lo :s z c
.. PD •T 7000 6PD /
P ,z\ ri. .
Ac — 25 lig Ac
a I 1 y xa ± ----- Bo -Pt.)
- I1J• g._ X LOO i
. .

.
(464sii to A
4 - o clee
-
, q c) .p 84-
LI I 78"'
Os
ex1-5-r ADF
75o x o,s x 0.8 x I 0c).
zoo 6,7 PD
-
x 5
eeak 74020
_ A- Dp , •
: • t-T--as ppo_ple/Ac,
-76v 0. c.5x too
el)
ic)
_ —
_ _ ZOO
_E_pD
LX
el I Li- AV-Vyear
5
wokKpAy.s/ K x x Ei Wks/rf =
4,4 se _
M6/ye4r pKvyegv-
ON 6101( gJeeIILSAy=
2 0PP DF
/.
_
22. 3cV.)
. _

°04-51. Io A
•
4-1Q-cV,
0 oc
15— coo-rd .
e), ,4 Tod = zci,000 PD
It
I. z
F(AA-u(e Itc 34,e)00 eiPi) PDF
f!
J 50 AzDu
-
Pi)/t-i-ou
x 3&0 eco -6PD A DF
-71
ye
kAvyNe iDeuelo_ieeJ
1,!
Ex (--J• CLL.-1u re
c) _2.97_C2C1C-D 34 ea)
4(i) Sc)C_D_•_ _ _ 7 ow _
76;_soo 6eD _25 cep (-7 (-0
PeAk. 189 500 6P e05_,Q90 f°
- -
•
•7 74,- _ _ •

• cf(041, (0 A
•
• .
ii 0 c m
....,....
,..„)•,c i ,....1 6....
'"--• TYD K I i e:._ .......
_ 70a.3 (--, PD
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• 1
len
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•
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.....e. --, f i
N'
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F-cA 47.f re
3 ''-?÷toO3
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—
,-
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ci
/
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•
• • 10 A
4-10-9 e#
—IP 12 0-r7 24
LI x '12c
!I •
4c
0,5 peopi
3s6o fc 0,6 )( ICE is? 600 EPL
= 5Nco0 (-)PD
VtA-Ltre
L245 fievic /A-c_
o. 8 x oo = aor_ow
x a 5
90 coO C-21D
I. Efl1iIt 170 D
Lie i_r\ r. /84, ci 00
1-61L1 irin2r 2q sao
()Ice
2 i476,50 riei)
3cD 2717_09 6P1)
- 4----(Auorcid
279 05D X 1,20 3_34- 9 0i0 Pt)
- - -

. • 9646i. 0 A
4- io-76
/3 0.P e4.
131 Coo4d.
rsi
i 9-7 H-ouses
Cornniercia(
III77 X 360) -1-( Klaffiviates Z5-6)P1) -=
72 4-ZO EPD
F=v1/4_1-tic _
e FrJ-1I -7
2 79' 334> q OD
- 7
--q.4 2.0 7e, 6000
3s_L1470 trv/) 4 077
K2, x
Peak_ --- 8780&15 -6Pi) oLe_72-50 6PJ)
•_111_ -

• q(p4s1,to A
14- oP 24
• rpri
329 (4iDuse5
1! Corniy-
(2 Sc,Incols
;.' 3(00 (-)121)j 4-68 /iag___Lvfl
1 2 2340 CIPD_
<-71.)CV)oc.)ks
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v712_19 oe_totpe
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_
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---7
1,,

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4-10-iGo
1.,
/6 c99 z4-
_,
- -
Opu,se5
e4 x 5(00
2
= 750 6PD
- ('
34_ y 26:3 .36 r-,I)i) r 7, 8aD EL)
• ..! •, .
• 20
9 .
. .5
' •
395 140,J,_:,e-z. il'532j0°
6PL,) = 144-3 .3o0 6R)
Peak 5e_i___OSO CI Pi)
rc,ci-ut r-c__
vy\c7, F.A11,1 Deodoped
_ , - - • -

• • 9&4‘I. io
4-10-ci&
/6) 04) 24_
_ABsi0001D
IAA( Lid
va_s COO x Li
413 iscc._
05 eecej /A-
__
413 )<__cp.e- x 6.• 103 16i5C0 (-)Pip
isZS x 0. 5 x 4-1/ 300 (-1_Po
ft_
s,_;-4QD 185r000 .226a3
_(20_17 69D .3.0Q
Z.! 6
503_1_7_50 6p./) 6 513T 250 (--;/°0

•
96451, 10
EA 54- _01_4
- - -780 Ac, pee* = 390 people
!i
15.8)< 100 12i1200 501
PC.A4A.
70c I 2s 92S -ag2rlQ-
1 ! 565 Irvic
Pv ‘o_pe001+-
3.<3 6,6kst.s z_ z p_cpee./ = 660/Acyyi-
_ _
(17q4k60) x Colic 100 = 12x4S00
...5q 300 P_D LT' I CD K-IPPA'r.x)r% Aqegfte:___
•
37 803 ) -2- lob 78
P(o tnY)e De•ye (oervietelf
6_0u -es k 2.2 Pecf_4_10u_v-
Z5°
_ -

• t 18 OP 84
ENGINEERING
201 AMENDMENT
FLOWS CHANGES FLOWS
(GPD) (GPD) (GPD)
a. Existing Residential 242,900 242,900
b. Existing Commercial 63,500 63,500
c. Existing Industrial 109,700 (40,000) 69,700
d. Non-Excessive Ill 191,900 10,400 202,300
e. Residential Growth 96,040 96,040
f. Commercial Growth 20,580 20,580
g. Unspecified Industrial Growth 46,110 (8,510) 37,600
h. Specified Industrial Growth 280,000 (180,000) 100,000
i. Planned Residential Growth Outside Stanley 97,650 (70,000) 27,650
TOTAL: 1,148,380 (288,110) 860,270

• 0/) 24
ti Aep rpaea 201 n G-03 = I . 48 KA6D
14-4)6eS
Planned 72es;ct e V\ (:) R.(31)-6\ 0(4.4-s
201 Coczp PD
/ x 7.06P4 )
PeopDf-...,e. aez u f1/45k+ ut I of 00+
ioAceszt
-1 4.co 1,;,-(--s eas fpryi,a3,7- x .76 6 top pc
70, OnD 6ED t?eciUz _
WaiikJc.1- 1-)c.t.s 1..).s 4a, I le c:i bOcZA i2ecic i
Fcaf-til-k -I-0 Pc i/fc
201.0a.g_(.5_PS
(0 vn Zo3 030 6 Pi)
= t 6-11'1) f2_cclu ZI7A
•
_ _

20 of z4
OPTION 3: PS FLOW SIZING CRITERIA:
DESIGN
ADF @ PEAK @
0.5 MGD 0.5 MGD 2.5 Peak Factor
LINE 1 - DCPS:
STL 500,000 1,250,000
J 112,400 281,000
K 111,900 279,750
I 109,200 273,000
E 46,000 115,000
F 380,000 950,000
D 82,000 205,000
B 407,500 1,018,750
C 92,800 232,000
G 145,000 362,500
A 135,000 337,500
H 263,300 658,250
2,385,100 5,962,750
4,141 GPM
W. K. DICKSON Page 1 7/22/96

96.05/ 10 A
4-R
e, 24-
tORT1010 i11 Pur(\p e
(Aff pa.55 .5,4)
.• ADF 3F35 AA61) 6;55-- EiPW\
Peak =
2 % K 2,5 = 50 fkkr-,D
4 1 38 6Rn
100 y 5A-A FLoosp I,° 563 -
_
PS (72:14-e.
) N,F t.)t) =
5-84 .; --- -
. ZTTT -1
56°
/0e50, -
7 9_90 — _41-7xisr
67eV e 660 ±-
_
_ _

TRIAL: 3D
ig �
C= 140 C = 140
1000 FT 7,990 FT Z2 2¢
18 PIPE 12 " PIPE
/PS\
14 " PIPE DESIGN FLOW 4150
7,990 FT C-FACTOR 140
SSUME HL= 3 FT C = 120 LINE SIZE 18
HEAD LOSS 4.28
" PIPE: Q = 0.560 MGD
14 " PIPE: Q= 0.720 MGD STATIC HEAD 50
1.280 MGD FRICTION HEAD 58
TDH 108
0.000241
QU1VALENT LENGTH =:
18 " PIPE: C = 140 B-C= 12,455 LF
PS-B = 1,123 LF
13,578 LF
low(GPM) 4150
-Factor 140
Pipe Size (in) 18
elocity (fps) 5.23
2/2g 0.081
Ft of Pipe 1000
-ntrance Loss 1
xit Loss 1
Enter#90's 2
Tee (str) 0
ee(turn) 0
check Valve 1
;ate Valve (open) 1
lug Valve (open) 0
Loss 4.81
Total Loss:
IAZEN-WILLIAMS FORMULA:
)ESIGN FLOW(GPM) 4150
;-FACTOR 140
LINE SIZE (IN) 18
(ELOCITY (fps) 5.23
/2/2G 0.081
HEAD LOSS/ 1,000 FT 4.28
.ENGTH OF LINE 1000
-OTAL HEAD LOSS 4.28

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14-Jun-96
03:45 PM
^SIGN FLOW 4,150 gpm
FACTOR 140
NE SIZE (IN) 18
5.23
4E: FORCE MAIN 0.081
...JUIVALENT LT OF PIPE= 13,578 4.28
'ATIC HEAD - MIN 0 0 0
- MAX 610 560 50
)TAL HEAD (TDH)
MIN 0
MAX 108
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......................................................................
0 0.00 0.00 0 50 0 50
500 0.08 1.15 0 50 0 51
1,000 0.31 4.16 0 50 0 54
1,500 0.65 8.82 0 50 0 59
2,000 1.11 15.03 0 50 0 65
2,500 1.67 22.72 0 50 0 73
3,000 2.35 31.85 0 50 0 82
3,500 3.12 42.37 0 50 0 92
4,000 4.00 54.26 0 50 0 104
4,500 4.97 67.48 0 50 0 117
5,000 6.04 82.02 0 50 0 132
4,150 4.28 58.09 0 50 0 108
)w (GPM) 4,150 2,075 DUTCHMAN CREEK PUMP STATION - OPTION III
Factor 140 FORCE MAIN N-7990 E N-1000
Pioe Size (in) 2 3 4 6 8 12 14 18
.locity (fps) 423.66 188.29 105.91 47.07 26.48 5.88 4.32 5.23
.2/2g 6.585 2.927 1.646 0.732 0.412 0.091 0.067 0.081
Ft of Pipe 0 0 0 0 0 7,990 7,990 1,000
itrance Loss 0 0 0 0 0 0 0 1
:it Loss 0 0 0 0 0 0 0 1
Enter # 90's 0 0 0 0 0 0 0 2
ie (str) 0 0 0 0 0 0 0 0
ie(turn) 0 0 0 0 0 0 0 0
Check Valve 0 0 0 0 0 0 0 1
ate Valve (open) 0 0 0 0 0 0 0 1
ug Valve (open) 0 0 0 0 0 0 0 0
Loss 0.00 0.00 0.00 0.00 0.00 246.27 154.64 4.81
Total Loss: 405.71

2171 � . Z41
'IAZEN-WILLIAMS FORMULA:
L)ESIGN FLOW (GPM) 4,150 4,150 4,150 4,150 4,150 4,150 4,150 4,150
':-FACTOR 140 140 140 140 140 140 120 140
.INE SIZE (IN) 2 3 4 6 8 12 14 18
VELOCITY (fps) 423.66 188.29 105.91 47.07 26.48 11.77 8.65 5.23
V2/2G 6.585 2.927 1.646 0.732 0.412 0.183 0.134 0.081
LEAD LOSS / 1,000 FT ######## 26370.23 6495.55 901.54 222.07 30.82 19.35 4.28
LENGTH OF LINE 0 0 0 0 0 7,990 7,990 1,000
TOTAL HEAD LOSS 0.00 0.00 0.00 0.00 0.00 246.27 154.64 4.28

, .
State of North Carolina
Department of Environment,
Health and Natural Resources •
Division of Water Quality
James B. Hunt, Jr., Governor
Jonathan B. Howes, Secretary O 1\1 R
A. Preston Howard, Jr., P.E., Director
August 27, 1996
N.C. DEPT. OF
ENVIRONMENT, HEALTH,
fie NATURAL RESOURCES
MEMORANDUM AUG 29 1996
TO: Mike Parker, Water Quality Project Engineer OF ENVIRONMENTAL Mooresville Regional Office DIVISION(1 FNVI NMENTREGIONAL OFFICE
GL ENT
MOFROM: Ryan Scruggs, Project Manager
Facilities Evaluation Unit
SUBJECT: Town of Stanley
Revised Engineering Amendment to the 201 Facilities Plan
Project No. E-SBF-T-95-0R20
Transmitted herewith is one copy of the above subject Revised Engineering Amendment
for your files. In response to your comment dated June 18, 1996, the engineer offered one (1)
sentence to resolve the issue. Please let me know if this response is adequate for your purposes.
Feel free to contact me at [phone] to discuss this matter in further detail if necessary.
RMS/kc
Attachment
cc: FEU
SBF
Construction Grants&Loans Section 11I4tLI
FAX [phone]
P.O.Box 29579,Raleigh,North Carolina 27626-0579 An Equal Opportunity/Affirmative Action Employer
Voice 919-733-6900 Reduce Reuse Recycle 50%recycles/10%post-consumer paper

•
N.C. Ila.Y r ()!
ENVIr2Q) p
P.RECF \ ED
, t c.rs
b;-1G > 1996
AUG 29 1996
WK DIVISION OF
DICKSON i-r,;5T` y, .gist S .=. s h:l 5 5•.„ t11� El t:. �::!IiyE
U�; ENENT
T MCIALS L1E REr:i NA1 OFFICE
August 22, 1996
Mr. Jay B. Lucas, P.E., Supervisor
Facilities Evaluation Unit
_AM
North Carolina DEHNR, Division of Environmental Management
Enaineers Post Office Box 29579
Planners Raleigh, North Carolina 27626-0579
Surveyors
Re: Town of Stanley Engineering Amendment
to 201 Facilities Plan, Project No. E-SBF-T-95-0R20
WKD # 96451 .10 I
Dear Mr. Lucas:
The enclosed "Revised" Engineering Amendment (dated August 1996)
includes changes relating to technical review comments received on
June 28, 1996. All of the comments are covered in the revised
amendment as follows:
1 . Table 2 on pages 5 and 6 is revised.
2. Table 2a is inserted on page 6. Also refer to paragraph
below Table 2a. A service area map is included after
page 6.
3. Tables 3 and 4 are revised. Two (2) figures are inserted
after page 8 identifying outfall location, diameter, lengths
and showing pumping stations and the sewer meter
locations.
4. The lengths of sewer in the Environmental Assessment
are approximate lengths. Refer to Table 3 for actual
lengths.
5. See last paragraph on page 6.
6. See paragraph below Table 4 on page 8.
7. See page 8.
•
1924 Cleveland Avenue Other Offices. Atlanta GA
Charlotte, North Carolina 28203 Hicko llr.NC
Hict;ent NC
704 334-5348 raletaih NC
FAX [phone] ColL4nuha SC
THIS BELONGS TO
SBF SBF

August 22, 1996
Mr. Jay B. Lucas, P.E., Supervisor
Page 2
8. A present worth analysis is included on page 10.
9. See next to last paragraph on page 6. The sewer
INV interconnect is sized to handle the 0.5 MGD of flow to
the WWTP. Design calculations are included in the
Engineers
Planners Design Notes.
Surveyors
1 1 . A resolution is included after page 11 .
12. See item 3 on page 3. One of the two existing floating
aerators can be used as a backup should one of the 25-hp
aerators be out of service.
13. The calculations on page 21 of 21 of the design notes are
for the Sludge Holding Basin. The mixer size has been
changed to 20-hp and any three mixers will provide the
mixing required with the fourth mixer available as backup
should one of the other mixers be out of service.
14. The BOD design loading criteria for the WWTP is 350
mg/I. The design calculations have been changed to
reflect this change.
15. See page 11 .
16. See Gary E. Parker's letter inserted after page 11 .
17. See next to last paragraph on page 3.
Please advise if you have any questions.
Sincerely,
W. K. DICKSON & CO., INC.
M. L. Wolfe
Enclosure:
cc: Town of Stanley

State of North Carolina
Department of Environment,
Health and Natural Resources A7•111Ylirii
Division of Environmental Management
James , Jr., Governor Jonathan B. Howes, Secretary FD
ecretaryp E N N R
A. Preston Howard, Jr., P.E.,..Director
June 28, 1996 N.C. DEPT. OF
ENVIRONMENT, HEALTH,
& NATURAL RESOURCES
AUG 29 1996
Mr. Gary E. Parker, Town Manager
Town of Stanley DIVISION OF ENVIRONMENTAL `"ANAODIENT
Post Office Box 279 MOORESVILLE REGIONAL OFFICE
Stanley, North Carolina 28164
SUBJECT: Town of Stanley
Engineering Amendment to the
201 Facilities Plan
Project No. E-SBF-T-95-0R20
Dear Mr. Parker:
The Construction Grants & Loans Section has completed its review of the subject
Engineering Amendment and has the attached comments. Three (3) copies of a revised
Engineering Amendment which incorporate responses to these comments should be submitted
for our review and approval as soon as possible.
If you have any questions concerning this matter, please contact Ryan Scruggs at (919)
715-6209.
Sincerely,
Jay B. Lucas, P.E., Supervisor
Facilities Evaluation Unit
RMS/kc
Attachment (all cc's)
cc: W.K. Dickson & Co.
Mooresville Regional Office
Allen Wahab
DMU
FEU
SBF
Construction Grants& Loans Section �� FAX [phone]
P. O. Box 29579,Raleigh, North Carolina 27626-0579 Tif An Equal Opportunity Affirmative Action Employer
Voice 919-733-6900 se 50%recycled/1O%post-consumer paper

TOWN OF STANLEY
Technical Review Comments for the
Engineering Amendment to 201 Facilities Plan
Table 2 on page 4 shows that flow projections for the Town of Stanley have been
reduced from 1.148 mgd to 0.854 mgd. The unspecified industrial growth(part g)
figure of 42,110 gpd is incorrect and should be 37,610 gpd. This figure can be
calculated by adding the existing residential, commercial, and industrial (parts a,
b, and c) and multiplying the total by 0.10. As a result of this change, the total
engineering amendment 20-year design flow should be 849,880 gpd or 0.850
mgd.
2. Please identify how the flows will be split between the existing Stanley WWTP
and the sewer transport line to Mt. Holly. Confirm that the flow will be split in
such a manner as to not overload the Stanley WWTP. Clearly define the service
areas for each treatment facility. Provide separate flow projections for each
treatment facility as well as the total flow projections presented in Table 2 on page
4.
3. Some of the linear feet of sewer interconnection lines found in Table 3 and Table
4 on page 5 and on page 4 of 25 in the Design Notes for Mt. Holly - Stanley
Sewer Interconnect do not match. Please confirm the linear feet of each sewer
line size to be constructed for the sewer interconnection from Stanley to Mt. Holly
so that all three of these sources contain the same information. Provide a map
identifying location, diameter, and length of each of the new and existing lines.
Identify the location of the sewer meter and the Dutchman Creek pump station on
this map as well. Also identify whether the lines are force mains or gravity lines.
4. Page 1 of the Environmental Assessment states that 27,300 feet of gravity sewer
and 1400 feet of force main are included in the proposed project. Confirm that
these figures are accurate and agree with the information provided in Table 3 and
Table 4.
5. The flow summary on pages 5 of 25 and 6 of 25 in the Design Notes for Mt. Holly
- Stanley Sewer Interconnect uses a peak flow factor of 2.0. Typically, a peak
flow factor of 2.5 is used. Please revise these flow calculations or provide an
engineering basis for using a factor of 2.0. Also, the peak flow into each line
segment and the depth of flow at peak in each line segment should be provided.
Clearly identify the design flow rate for each line segment. Gravity sewer lines
should be designed to flow half full at the 20-year design PEAK flow rate.
Several of the Design ADF's provided on page 4 of 25 do not match with the
Design ADF's in Table 3 on page 5. Please revise the appropriate figures as
necessary. It is our understanding that the new sewer outfall line will be sized for
the Town of Stanley's entire 20-year design flow.

6. Table 1 on pages 2 and 3 provides a cost estimate of$1,312,500 for
improvements to the Stanley wastewater treatment plant. Table 4 on page 5
provides a cost estimate of$2,746,900 for sewer interconnection from Stanley to
Mt. Holly. The combined cost of these two estimates is $4,059,400. Will the
entire project be-funded from the State Bond Loan Program? Currently, the Bond
Loan amount is $3,098,500. How does the town intend to fund the additional
$960,900 portion of the project?
7. Please be advised that receipt of a loan from the North Carolina Water Pollution
Control Revolving Funds is contingent on the review and approval of the
proposed loan by the Local Government Commission.
8. Please provide a present worth analysis for the Stanley - Mt. Holly Sewer
Interconnection Option I, Option II, and Option III on page 7. All present worth
analyses should use a discount rate of 7.75% and associated compound interest
factors.
9. Confirm that the existing Mt. Holly wastewater treatment plant has the additional
capacity to handle 0.5 mgd of wastewater from the town of Stanley over the 20-
year planning period. Provide calculations demonstrating that the Mt. Holly
collection system will be capable of transporting the proposed 0.5 mgd flow to the
Mt. Holly treatment plant.
11. Please submit a resolution adopted by the Town of Stanley agreeing to implement
the sewer interconnection project and the wastewater treatment plant
improvements.
12. Page 5 of 21 of the Stanley WWTP Design Notes shows that 42 hp is required to
provide adequate mixing in the aeration basin. The proposed 2 - 25 hp mixers
will not provide adequate mixing in the event that the largest unit should
malfunction. Consider providing 3 - 25 hp mixers in the aeration basin or having
a spare mixer on site.
Page 21 of 21 of the Stanley WWTP Design Notes shows that 62 hp is required to
provide adequate mixing in the aerobic digester. The proposed 4 - 15 hp mixers
will not provide adequate mixing in the event that the largest unit should
malfunction. Consider providing 5 - 15 hp mixers in the aeration basin or having
a spare mixer on site.
14. The concentration of influent BOD used in the design calculations is 300 mg/L
rather than 350 mg/L as shown on page 2 of 21 of the Design Calculations for the
Stanley WWTP. Please revise the influent BOD concentration figure on page 2 of
21 of the Design Calculations to read 300 mg/L.
15. Identify how the user fees will be affected for a typical residential customer using

5,000 gallons per month when the Town of Stanley must provide their share of the
cost for the future Mt. Holly WWTP expansion. Provide an anticipated schedule
for the expansion of the Mt. Holly WWTP.
16. The existing intermunicipal agreement between the Town of Stanley and the City
of Mt. Holly requires revision. This can be achieved by adopting an amendment
to agreement. This amendment should include the following information:
A. As recipient of the loan, the Town of Stanley must serve as the lead
agency for the construction of the sewer interconnect project (page 1,
section 2).
B. Update the project cost estimate (page 2, section 6).
C. Provide a copy of the interlocal sewer interconnect agreement to be
entered into by Gaston County and the Town (page 2, section 6.1.).
D. The Town will be required to retain ownership of the outfall line until all
State loan funds have been repaid (page 3, section 9).
E. The capacity purchased by the Town should be 500,000 gallons per day
rather than 200,000 gpd (page 4, section 11).
F. __, Provide a copy of"Exhibit A" (page 2, sections 4.A. and 4.C.).
17. Please address the attached comment from the Mooresville Regional Office
regarding short-circuiting in the final clarifiers.

LMEHINR
DIVISION OF ENVIRONMENTAL MANAGEMENT
June 18, 1996
memo To;� :Ryari Scruggs /� � yy
b Y F,•. F
From: Rex Gleason
fiv
Prepared By: Michael Parker'
Subject : Town of Stanley ; ,i,,fts741, " '.,�.,
Engineering Amendment
Project No. E-SBF-T-95-0R20
Gaston County
Per your request , a review has been conducted by the
staff of this Office of the subject engineering amendment
prepared for the Town of Stanley.
Based on our review the only comment we have to offer is
that the amendment does not address what has been identified
by DEM staff as a bad short-circuiting problem in the final
clarifiers . Although the proposed additions will undoubtedly
improve operational flexibility, the resolution of existing
problems certainly needs to be part of the propsed WWTP
upgrade .
If you have any questions regarding this matter, please
advise.
mlp
Wgen;C04:3il dac

DEMINR
DIVISION OF ENVIRONMENTAL MANAGEMENT
June 18 , 1996
Memo To: Ryan Scruggs
From: Rex Gleason
IOC-
Prepared By: Michael Parke4111'
Subject : Town of Stanley
Engineering Amendment
Project No. E-SBF-T-95-0R20
Gaston County
Per your request , a review has been conducted by the
staff of this Office of the subject engineering amendment
prepared for the Town of Stanley.
Based on our review the only comment we have to offer is
that the amendment does not address what has been identified
by DEM staff as a bad short-circuiting problem in the final
clarifiers . Although the proposed additions will undoubtedly
improve operational flexibility, the resolution of existing
problems certainly needs to be part of the propsed WWTP
upgrade.
If you have any questions regarding this matter, please
advise.
mlp
b:lgealcogtieia.doc

St'ate of North Carolina
j/ Department of Environment,
0 . Health and Natural ResourcesA77•11147A,
o/ 1Division of Environmental Management
will,
James B,Hunt, Jr., Governor
„cV /
1 _ \ Jonathan B. Howes, Secretary DOE H NI F .
A. Preston Howard, Jr., P.E., Director
tYji 7 May 29, 1996 ei ,._ '.
i t
/`-, MAY 1 1996
� Py�
`(� #/' t MEMORANDUM ��'�fSl�Qpddp;(1f[ F(VYI�[7GN 4 Lf #hr6 : ;
MOORtsAU Wall' A: iJ99jJy
TO: Rex Gleason, Regional Water Quality Supervisor •
Mooresville Regional Office
FROM: Ryan Scruggs, Project Manager {��S
Facilities Evaluation Unit /
SUBJECT: Town of Stanley
Engineering Amendment
Project No. E-SBF-T-95-0R20
Transmitted herewith is one copy of the above subject engineering amendment for your
files. Please return your written response or comments to this office by June 14, 1996.
RMS/kc . !le-
Attachment `�� ,,, - )
cc: FEU
SBF 41JJ VI61 0
Construction Grants&Loans Section St FAX [phone]
P. O. Box 29579,Raleigh,North Carolina 27626-0579 %I An Equal Opportunity Affirmative Action Employer
Voice 919-733-6900 50%recycled/10%post-consumer paper

•
RL
! Y:
MAY 28 1996
GairritM[ too ANTS& 1.0A
DEM-EFINR s!'CM
r ,
ENGINEERING AMENDMENT
TO THE •
TOWN OF STANLEY
201 FACILITIES PLAN
prepared for
TOWN OF STANLEY
114 South Main Street
Stanley, North Carolina 28164
By
W. K. DICKSON & COMPANY, INC.
1924 Cleveland Avenue
Charlotte, North Carolina 28203
MAY 1996
eQ4,i( �
ssioh` Vi •® ��
I'`.s
..:4310111P
'G1NEt
,9 ,a

WK
DICKSON May 22, 1996
Mr. Cecil Madden
NCDEHNR - DEM - Construction Grants & Loans
P. O. Box 29579
pik Raleigh, North Carolina 27626-0579
IMP
Engineering
Re: Amendment
Engineers A -
Planners Town of Stanley
Surveyors WKD # 96451.10
Dear Mr. Madden:
The following is an amendment to the 201 Facilities Plan prepared by the Town
of Stanley. The selected 201 alternative recommended expanding the Town's
wastewater treatment plant to 1.0 MGD to handle future capacity needs.
The Town of Stanley and the City of Mount Holly in March 1996 entered into an
intermunicipal agreement for Mount Holly to treat a portion of Stanley's
wastewater at Mount Holly's treatment plant on the Catawba River. This will
allow Stanley to reduce flow at their treatment facility and not expand the
capacity of the plant. •
The agreement calls for Stanley to purchase 0.500 MGD of treatment capacity at
the Mount Holly facility and construct a sewer interconnect between the two
sewer systems to convey wastewater from Stanley to Mount Holly for treatment.
The Town will also make several needed improvements at their wastewater
treatment plant as a part of this engineering amendment.
201 AMENDMENT CHANGES
The following 201 Amendment changes, dated May 1996, are included for the
Town of Stanley:
Wastewater Treatment Plant (V VVTP):
1. NPDES Permit Flow. The Stanley Wastewater Treatment Plant flow
capacity will remain 0.500 million gallons per day (MGD). The following
improvements are planned and are included in the 201 Amendment:
1924 Cleveland Avenue Other Offices.
Charlotte, North Carolina 28203 Atlanta,GA
704 334-5348 Asheville.NC
FAX [phone] Raleigh,NC
Columbia,SC
1

2. Aerobic Digester. A new aerobic digester (64 ft diameter with an 18 ft.
side water depth) will be provided to replace the existing unit. The
digester will provide stabilization and storage of sludge for 90 (plus) days
at a 2% solids. Additional storage can be done in the existing sludge
holding basin.
3. Aeration & Mixing. Replace the aeration basin aerators with two 25-hp
floating aerators. Move two existing 20-hp aerators to the sludge holding
basin and provide four 15-hp flow directional mixers in the sludge holding
basin.
4. Dechlorination Facilities. A sulfur Dioxide gaseous dechlorination system
will be provide for the 0.5 MGD treatment capacity. Two 100 lbs/day
feeders with accessory equipment and alarms will be provided. Piping
and valve modifications will be made to the existing chlorine contact basin
to segregate the basin into two separate basins.
5. Standby Power. Standby power for the plant, excluding auxiliary lighting
or sludge treatment facilities will be added as required for dischargers to
WS waters.
6. Influent Screening and Flow Measuring. Replacement equipment for the
mechanical bar screen and flow measurement of the influent flows will be
provided.
7. Mechanical Bar Screening. Replace the existing mechanical bar screen
with a new unit.
Est 500 (see
Tak project
cor ?' t to date
by
LH— o.,�� d 9 , ; � -e j?mil '}/—
E_
Cor
40,000
8,000
135,000
35,000
ocum Kemovai rumping 16,000
2

Sludge Meters 8,000
Aerobic Digester & Sludge Handling 475,000
Chlorination/Dechlorination 130,000
Structure Repairs 50,000
Standby Power 50.000
Total Construction $947,000
Engineering Services:
Design & Survey Mapping 50,000
Construction Services 4,000
Engineering Services for 1.0 MGD Expansion 216.500
Total Engineering Services $270,500
Project Contingencies: $95.000
Total Project Cost: $1,312,500
Mount Holly/Stanley Sewer Interconnect:
A new connecting outfall line is to be built between the Town of Stanley (Town)
and the City of Mount Holly (City) to convey a portion of the Town's wastewater
to the City's treatment plant for treatment. The improvements will include a new
sewage pumping station, replacing two existing pumping station in the City's
system. The upgrades will be sized for all of the Town's existing and twenty year
projected flow plus existing and projected flows tributary to the new outfall in the
Mount Holly system. The Town has entered into an agreement with the City to
purchase 0.5 MGD of treatment capacity at the City's 4.0 MGD treatment plant
located east of Mount Holly on the Catawba River. A copy of the agreement
between the two municipalities is attached to the engineering amendment. The
agreement has provisions for future additional treatment capacity purchase by
the Town upon approval of both parties.
REVISED PROJECT DESCRIPTION
The Town operates a 500,000 gallon per day (GPD) wastewater treatment plant
(VWVfP) located at the end of Lola Street northwest of the Town. The treatment
plant is an activated sludge process, discharging treated effluent to Mauney
Creek.
Stanley will continue to treat most of its wastewater at the Town's treatment
plant. The sewer interconnect will be built to the industrial areas along Highway
27 east of Stanley and will serve both industrial and residential areas. The
outfall will be built to accommodate future extensions to pick up other areas of
3

,
the Town's service area in the future. Long range all of the Town's wastewater
could be discharged to the Mount Holly system with the Town's existing
treatment plant retired or eliminated. It is the Town's plan to continue to operate
the existing plant for some time into the future until either it is feasible to treat
their wastewater at Mount Holly or future discharge limits to Mauney Creek make
the discharge no longer feasible.
Stanley's flow projections for the twenty-year planning period are revised to
0.854 MGD from a previously identified need of 1.148 MGD. This change
reflects changes in industrial discharges effected by pretreatment and reuse of
process water and a reduction in planned residential growth in areas adjacent to
the Town's service area. This treatment capacity need can be met with the
existing treatment capacity (0.5 MGD) and the purchased treatment capacity
from Mount Holly (0.5 MGD). Table 2 shows flow projection changes for the
Town.
TABLE 2
TOWN OF STANLEY
FLOW PROJECTIONS
Engineering
201 Amendment
Flows Changes Flows
(GPD) (GPD) (GPD)
a). Existing Residential 242,900 242,900
b). Existing Commercial 63,500 63,500
c). Existing Industrial 109,700 (40,000) 69,700
d). Non-Excessive Ill 191,900 191,900
e). Residential Growth 96,040 96,040
f). Commercial Growth 20,580 20,580
g). Unspecified Industrial Growth 46,110 (4,000) 42,110
h). Specified Industrial Growth 280,000 (180,000) 100,000
I). Planned Residential Growth 97.650 (70.000) 27.650
Total: 1,148,380 (294,000) 854,380
The interconnect outfall will be sized for the total projected flow. The new outfall
and pumping station will include the following:
4

,
TABLE 3
SEWER INTERCONNECT
BASIS OF DESIGN
OUTFALL DESIGN
SIZE LENGTH AVG. DAILY FLOW
8" 4,000 LF 0.031 MGD
18" 13,500 LF 0.967 MGD
12" 2,000 LF 0.490 MGD
21" 3,790 LF 1.698 MGD
18" 940LF 1.115MGD
PUMPING STATION: 3310 GPM at 165 ft TDH
TABLE 4
SEWER INTERCONNECT
PROJECT COST
CONSTRUCTION:
21" Sanitary Sewer (3,700 LF) 338,300
18" Sanitary Sewer (14,440 LF) 1,104,700
12" Sanitary Sewer (2,780 LF) 141,800
8" Sanitary Sewer (4,000 LF) 136,000
14" Force Main (1,000 LF) 30,000
Sewer Meter 50,000
Dutchman Creek Pump Station 350.000
Total Construction: $2,150,800
Engineering Services:
Design & Survey Mapping 197,300
Construction Services 126.600
Total Engineering Services $323,900
Legal. Administrative & ROW: $61,200
Project Contingencies: $211.000
Total Project Cost: $2,746,900
5

JUSTIFICATION
The Stanley treatment plant is currently operating at 92% of its rated treatment
capacity. NCDEM regulations require Stanley to increase the capacity to meet
future capacity, detail specific measures to achieve waste flow reductions or
develop alternative plans to reduce flow at the treatment plant. Estimated cost to
expand the treatment plant is $3,006,400. Waste flow reduction is not
achievable in a growing economy. Stanley has chosen to reduce flow at the
treatment plant with an intergovernmental agreement with Mount Holly to treat up
to 0.5 MGD of wastewater. It is advantageous for Stanley to purchase
wastewater treatment capacity from Mount Holly in lieu of expanding their own
facility. It is increasingly uneconomical for the Town to operate its own
wastewater treatment facilities. Consolidation of these activities with the City of
Mount Holly is not only financially sound, but furthers regional concepts of
consolidation of small wastewater discharges into larger regional facilities,
reducing the total number of discharges. The sewer interconnect option offers
the Town the option to purchase additional treatment capacity at Mount Holly in
the future. This option is a hedge against future treatment regulation changes
which are increasingly difficult for small treatment operations like Stanley to
comply. The estimated project cost of the sewer interconnect with Mount Holly,
including outfalls and pumping station is $2,746,900.
The sewer interconnect offer the additional advantage of eliminating four existing
sewage pumping stations, two in the Stanley system and two in the Mount Holly
system. The wastewater in the Stanley is currently pumped two to three times
before reaching the treatment plant. With the sewer interconnect the wastewater
will be handled by gravity. The sewer interconnect will reduce the amount of
wastewater to be handled at the Town's West Chestnut Street pumping station
which now is a major pumping station in the system and experiences overloads
during peak flow periods. In the Mount Holly system, the interconnect project will
replace two older pumping stations in their system with one larger pumping
station.
COST EFFECTIVENESS:
Stanley WWTP. Treatment at the Stanley WWTP would require expansion of
the treatment plant and advanced level of treatment required to discharge at the
larger flows into a low flow stream. This option is more expensive than the
sewer interconnect option.
Sewer Interconnect. Three sewer interconnect options were evaluated. All three
options conveys wastewater by gravity sewer between Stanley near Highway 27
to the Mount Holly system. Option I requires two new pumping stations in the
6

Mount Holly system to replace two older stations. The existing Woodlawn
Avenue pump station and Dutchman Creek pump station would be replaced.
Option II requires construction of a new pump station near the existing Dutchman
Creek pump station near NC-273 Bypass bridge. The existing Woodlawn
Avenue pump station would be rebuilt with larger pumps and a new force main
across Dutchman Creek to a new gravity sewer. The existing Dutchman Creek
pump station would be abandoned.
Option III requires a new pump station on the northeast bank of Dutchman Creek
near Alsace Mill. The existing Woodlawn Avenue pump station and Dutchman
Creek pump station would be abandoned. Construction cost of the three options
are as follows:
Option I $2,908,800
Option II $2,795,900
Option III $2,150,800
Both the no-action and Stanley WWTP expansion alternatives were rejected for
economic reasons and treatment capacity needs. Option III was selected as the
sewer interconnect alternative for economic reasons. Option Ill is less expensive
to build and operating one pumping station require less maintenance and
operation cost over Options I and II.
USER FEES
Sewer revenue needs upon initial start-up will be $917,400 per year or$76,450
per month. Currently, 35 percent of the Town's sewer revenues come from its
residential customers. Assuming this pattern continues, the monthly sewer
revenues which must be generated from residential customers would be:
$76,450/month x 35% = $26,663/month
Based on current population projections, there should be approximately 1,060
residential accounts at start-up. Monthly sewer cost for a residential user would
be:
$26,663/month / 1,060 customers = $25.24/month
ENVIRONMENTAL CORRIDOR
An Environmental Assessment, prepared by Robert J. Goldstein & Associates,
Inc., is attached to the end of this report.
7

INTERMUNICIPAL AGREEMENTS
The two municipalities have entered into an intermunicipal agreement for the
sewer interconnect project. A copy of the agreement is attached to the end of
this report.
TOWN RESOLUTION
(The Town will adopt a resolution to implement the sewer interconnect
project. A copy will be forwarded under separate cover.)
8

I...
STANLEY I
` .,oell:- TOWN OF STANLEY
'.�
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ENVIRONMENTAL ASSESSMENT
STANLEY to MOUNT HOLLY
WASTEWATER INTERCONNECTOR
GASTON COUNTY, NORTH CAROLINA
RJG&A Project No. 9617
16 MAY 1996
Report To:
Mr. Cecil Madden
N.C. Division of Environmental Management
Construction Grants Section -- P.O. Box 29535
Raleigh, North Carolina 27626
and
W.K. Dickson & Co., Inc.
1924 Cleveland Avenue
Charlotte, North Carolina 28203
[phone]
Robert J. Goldstein & Associates, Inc.
ENVIRONMENTAL CONSULTANTS
8480 Garvey Drive
Raleigh, North Carolina 27604-3175
Tel [phone]
Fax [phone]

TABLE OF CONTENTS
1.0. PROPOSED PROJECT 1
2.0. PURPOSE AND NEED FOR THE PROJECT 1
3.0. EXISTING ENVIRONMENT 1
3.1. Geology and Soils. 1
3.2. Existing Land Use. 2
3.3. Water Resources 2
3.4. Jurisdictional Wetlands. 2
3.5. Fish and Aquatic Habitats 3
3.6. Wildlife and Terrestrial Habitats 3
4.0. ALTERNATIVES ANALYSIS 3
4.1. No-Action Alternative. 3
4.2. Stanley WWTP. 4
4.3. Stanley to Mount Holly Interconnector 4
4.4. Selection of the Preferred Alternative. 4
5.0. ENVIRONMENTAL CONSEQUENCES 5
5.1. Land Use Changes 5
5.2. Prime and Unique Farmland 5
5.3. Public, Scenic, and Recreational Lands 5
5.4. Archaeological and Historical Resources 6
5.5. Air Quality 6
5.6. Noise Levels 6
5.7. Groundwater Resources 6
5.8. Surface Water Resources 6
5.9. Introduction of Toxic Substances 7
5.10. Eutrophication of Receiving Waters 7
5.11. Jurisdictional Wetlands 7
5.12. Fish and Aquatic Habitats 8
5.13. Wildlife and Terrestrial Habitats 8
5.14. Rare and Protected Species. 8
6.0. MITIGATIVE MEASURES 9
7.0. LITERATURE CITED 10

TABLES AND FIGURES
Table 1. Land Use and Habitat Types in the Project Construction Corridor. 11
Table 2. Rare and Protected Species Known from Gaston County 12
Figure 1. Stanley to Mount Holly Wastewater Interconnector,
Project Location Map. 13
Figure 2a. Project Corridor and Jurisdictional Wetlands 14
Figure 2b. Project Corridor and Jurisdictional Wetlands. 15
Figure 2c. Project Corridor and Jurisdictional Wetlands 16
Figure 2d. Project Corridor and Jurisdictional Wetlands. 1 7

•
1.0. PROPOSED PROJECT.
The Town of Stanley proposes to construct a wastewater collection and pumping
system along South Stanley Creek and Dutchmans Creek in northeastern Gaston County,
North Carolina (Figure 1). The project will connect the Stanley sewer system with the Mount
Holly system, and the wastewater will be treated and discharged at the Mount Holly WWTP
on the Catawba River.
The proposed facilities include a 2.7 MGD pump station located adjacent to Alsace Mill
between Alsace Street and Dutchmans Creek in Mount Holly, 27,300 feet of gravity sewer
from four existing pump stations to the proposed Alsace Mill pump station, and 1,400 feet
of force main paralleling the lowermost (southeastern) portion of the gravity sewer. The
existing pump stations (Dutchmans Creek, Woodlawn Avenue, Twin Brooks Drive, and
Jackson Park)will be abandoned. The proposed force main will discharge to an existing force
main at the intersection of NC-27 and NC-273 Bypass (Figures 2a-d).
2.0. PURPOSE AND NEED FOR THE PROJECT.
The Town of Stanley wishes to direct industrial, commercial, and residential
development along NC-27 southeast of town. The existing Stanley WWTP (0.5 MGD) on
Mauney Creek is in a separate drainage basin and would require significant pumping costs.
Future expansion of Stanley's WWTP capacity is constrained by the high cost of treatment
required by the state to discharge into a small stream.
Stanley purchased an agreement from Mount Holly to provide 0.5 MGD of wastewater
treatment at Mount Holly's 4.0 MGD WWTP on the Catawba River. The Mount Holly WWTP
• is better suited for accommodating future expansion than the Stanley WWTP.
The project will also serve western Mount Holly and allow both municipalities to
provide sewer service to the extraterritorial land between them. The project will ultimately
accommodate a wastewater flow of 2.7 MGD, provided that sufficient WWTP capacity is
made available.
3.0. EXISTING ENVIRONMENT.
3.1. Geology and Soils.
The project area is in the Charlotte Belt of the Piedmont physiographic province, with
a prevalence of metamorphosed quartz diorite, granitic rock, and felsic metavolcanic rock
(N.C. Division of Land Resources, 1985). Elevations range from 740 feet above mean sea
level at the Jackson Park pump station southeast of Stanley to 580 feet on Dutchmans Creek
in Mount Holly.
The prevalent soils are Chewacla loam, Helena sandy loam, Winnsboro loam, Wilkes
loam, Gaston sandy clay loam, and Pacolet sandy loam (Woody, 1989).
1

3.2. Existing Land Use.
The proposed Alsace Mill pump station will be located above the 100-year flood
elevation in a grassed area adjacent to Alsace Mill. Of the 27,300 feet of proposed sewerline
corridor, 17% is forest edge adjacent to existing dirt roads or utility lines, 53% is unbroken
forest, 16% is-shrub and sapling thicket, 13% is paved or grassed, and 1% comprises stream
crossings. Habitat types are described in detail in section 3.6 and Table 1.
The proposed wastewater service area beyond the Mount Holly city limits are sparsely
developed.
3.3. Water Resources.
Surface waters include Dutchmans Creek, its tributary South Stanley Creek, and an
unnamed tributary of South Stanley Creek,in the Catawba River (Lake Wylie) watershed. The
stream banks are forested along most segments. South Stanley Creek and its tributary have
mixed sand, gravel, cobble, and bedrock substrata, with numerous riffles. Dutchmans Creek
has a flatter gradient and a predominantly sandy bottom, with few riffles. All streams in the
project area are classified WS-IV by the N.C. Division of Environmental Management (DEM).
The WS-IV Critical Area for Lake Wylie begins on Dutchmans Creek immediately upstream of
NC-273 Bypass, which is the downstream end of the project area.
Groundwater aquifers in the project area are classified as MIF(Metaigneous Felsic) and
MII (Metaigneous Intermediate), with average well yields of 18 to 19 gallons per minute
(Daniel & Payne, 1990).
3.4. Jurisdictional Wetlands.
RJG&A ecologists Gerald Pottern and Patrick McMillan delineated jurisdictional
wetlands in the project corridor during April and May, 1996, using the 1987 COE Wetlands
Delineation Manual(Environmental Laboratory, 1987)and supplementary technical criteria for
hydrophytic vegetation, hydric soils, and hydrology indicators.
Twelve jurisdictional wetlands were located along South Stanley Creek upstream of
SR 1923 and its unnamed tributary (Figures 2b-d). The drainage basin area of South Stanley
Creek at the SR 1923 bridge is 4.38 square miles, and the wetlands upstream of this point
are headwater wetlands. No wetlands were encountered along Dutchmans Creek or the lower
portion of South Stanley Creek.
Eleven of the twelve wetlands are forested floodplain depression wetlands, with
canopies containing green ash, river birch, water oak, shagbark hickory, American elm,
sweetgum, sycamore, and red maple. The understory shrubs include saplings of the canopy
species, musclewood, Chinese privet, spicebush, silky dogwood, tag alder, elderberry, black
willow, winterberry, arrowwood, and box elder. Dominant vines and herbs include common
greenbrier, poison ivy, Virginia creeper,blackberry,sedges,soft rush,false nettle,jewelweed,
coneflower, turtlehead, cane, horsetail, sensitive fern, and southern lady fern.
2

•
The twelfth and lowermost wetland (F) is a marsh created by impoundment of an
intermittent stream for erosion control adjacent to a quarry. It supports shrub and vine
thickets containing tag alder, elderberry, black willow, buttonbush, swamp rose, and
blackberry;and an herb layer of Japanese grass,wingstem,thoroughworts, sedges,soft rush,
arrowhead, cattail, spikerush, and jewelweed.
3.5. Fish and Aquatic Habitats.
Fishes were sampled on 17 April 1996 with a 10-foot long, 3/16-inch mesh seine. The
dominant fish species in South Stanley Creek at SR 1923 were sandbar shiner, redlip shiner,
yellowfin shiner,greenhead shiner, rosyside dace, bluehead chub, striped jumprock,speckled
killifish, redbreast sunfish, and tesselated darter.
Dominant fishes in Dutchmans Creek upstream of Main Street included sandbar shiner,
spottail shiner,fieryblack shiner,whitefin shiner,bluehead chub,largemouth bass,white bass,
bluegill, redbreast sunfish, gizzard shad, Piedmont darter, and seagreen darter.
3.6. Wildlife and Terrestrial Habitats.
Floodplain and upland forested habitats in the project area are categorized below by
the N.C. Natural Heritage Program (NHP) community classification system (Schafale and
Weakley, 1990).
The floodplain forests consist of Levee Forest on well drained sand adjacent to
Dutchmans Creek and the lower half of South Stanley Creek, Bottomland Forest on poorly
drained silty soils behind levees, and Alluvial Forest along smaller streams where no levee has
formed. Dominant canopy trees in floodplain forests include the species listed in floodplain
depression wetlands in section 3.4, plus those less tolerant of prolonged saturation such as
bladdernut, carrionflower, southern sugar maple, and flowering dogwood.
Upland forests consist of Mesic Mixed Hardwood Forest on moist acidic slopes, Basic
Mesic Hardwood Forest on basic or mafic moist slopes, and Dry-Mesic Oak/Hickory Forest on
drier slopes and upland ridges. The mesic forests are dominated by beech, northern red oak,
water oak, southern sugar maple, red maple, sweetgum, tulip poplar, shagbark hickory,
mockernut hickory, silverbell, and bigleaf magnolia. The basic forest supports a greater
abundance and diversity of herbaceous species than does the acidic type. The dry-mesic
forest contains primarily white oak, southern red oak, scarlet oak, sourwood, and various
hickories, and a sparse herb layer.
4.0. ALTERNATIVES ANALYSIS.
4.1 . No-Action Alternative.
The no-action alternative would constrain development along NC-27 between Stanley
and Mount Holly to low density uses that can dispose of wastewater through septic systems.
This condition is undesirable for economic reasons, and the high failure rate of such systems.
3

4.2. Stanley WWTP.
Treatment at the Stanley WWTP would require WWTP expansion,excessive pumping
costs, and advanced level of treatment required for discharging large volumes of wastewater
into a stream with very low flow, as discussed in Section 2.0. This option was rejected as the
most expensive build alternative.
4.3. Stanley to Mount Holly Interconnector.
Three Stanley to Mount Holly wastewater interconnector alternatives were evaluated.
All include a new gravity sewer from the Jackson Park pump station southeast of Stanley to
the confluence of Dutchmans Creek and Taylor Creek in Mount Holly, and allow the existing
Dutchmans Creek, Jackson Creek, and Twin Brooks pump stations to be abandoned.
Option I requires construction of two new pump stations; one on the northeast bank
of Dutchmans Creek at its confluence with Taylor Creek, and one on the southwest bank of
Dutchmans Creek 400 feet west of the NC-273 Bypass bridge. The existing Woodlawn
Avenue pump station and Dutchmans Creek pump station would be abandoned.
Option II requires construction of a new pump station on the southwest bank of
Dutchmans Creek 400 feet west of the NC-273 Bypass bridge. The existing Woodlawn
Avenue pump station would be retained, and a new force main built across Dutchmans Creek
connecting it to the new gravity sewer along the northeast bank. The existing Dutchmans
Creek pump station would be abandoned.
Option Ill requires construction of a new pump station on the northeast bank of
Dutchmans Creek near Alsace Mill. The existing Woodlawn Avenue pump station and
Dutchmans Creek pump station would be abandoned.
A gravity sewer alignment adjacent to the existing sewer along the southwest bank
of Dutchmans Creek was considered, but determined impractical due to steep slopes,bedrock,
and the greater trench depth required.
4.4. Selection of the Preferred Alternative.
Both the no-action and Stanley WWTP expansion alternatives were rejected for
economic reasons.
Of the Stanley to Mount Holly interconnector alternatives, option Ill was selected as
the preferred alternative. It requires two new crossings of Dutchmans Creek, one new pump
station, and eliminates four existing pump stations. Options I and II require maintenance of
two pump stations, and option II also requires an additional Dutchmans Creek crossing.
Option I includes a force main, rather than gravity sewer, from the mouth of Taylor
Creek to the lower end of the project, and would allow preservation of a wider forested buffer
along Dutchmans Creek. The project engineers determined that the environmental benefits of
a wider buffer do not justify the higher construction and maintenance costs or the increased
risk of blockage or mechanical failure at the two new pump stations.
4

5.0. ENVIRONMENTAL CONSEQUENCES.
5.1. Land Use Changes.
Based on a 40-foot wide construction corridor, the project will disturb 25 acres,
including 16 acres of forest. The remaining acreage is previously disturbed land including road
and utility rights-of-way, lawns, pasture, old fields, and cutover land. A 20-foot wide
permanent access corridor will be maintained by periodic mowing.
Secondary and cumulative impacts of induced urban growth may affect land use
throughout the South Stanley Creek and Taylor Creek watersheds. The major changes will
be along NC-27 between Stanley and Mount Holly,where industrial park development is under
way. The DEM-mandated local watershed protection ordinances (Stanley, Mount Holly, and
Gaston County) will regulate the density and types of new development in those areas within
WS-IV watersheds, as discussed in section 5.8.
5.2. Prime and Unique Farmland.
Most of the project corridor is either frequently flooded or too steep to qualify as prime
farmland. Chewacla loam is a prime farmland soil only where it is drained and protected from
flooding or not frequently flooded during the growing season. Chewacla loam is the most
abundant soil mapped in the project corridor, but there are no flood control dams in or
upstream of the project area.
Helena sandy loam and Winnsboro loam are prime farmland soils where they occur on
slopes less than 8 percent, including a 2,500 foot segment between the Jackson Park pump
station and NC-27, and a few small areas along South Stanley Creek. None of these areas
was in cultivation during the field reconnaissance (April to May, 1996).
Following construction, areas of prime farmland soils will continue to be suitable for
agriculture except for the small areas occupied by manholes. Loss of prime farmland soils to
induced urban development in the wastewater service area is likely to occur. The rate and
geographic distribution of such loss will depend on social and economic factors, and cannot
be predicted.
•
5.3. Public, Scenic, and Recreational Lands.
A ball field and playground on the north bank of South Stanley Creek east of SR 1923
is the only dedicated public recreational area in the project corridor. Use of this facility will
be interrupted during construction, but no long-term impacts are expected.
Dutchmans Creek is a popular bank fishing stream for largemouth bass, redbreast
sunfish, catfish, and white bass during their spring spawning migration, according to local
anglers. The segment most heavily fished extends from the Main Street bridge in Mount Holly
to the mouth of Dutchmans Creek. Fishing access from Main Street to NC-273 Bypass may
be temporarily interrupted during construction, but no long-term direct impacts of the project
are anticipated. Induced urban growth, however, may adversely affect fish habitat and public
access to Dutchmans Creek, as discussed in section 5.12.
5

5.4. Archaeological and Historical Resources.
No archaeological or historical inventory of the project corridor has been conducted.
The State Historic Preservation Office,N.C. Department of Cultural Resources,will determine
whether further information is required.
5.5. Air Quality.
An increase in airborne particulates and exhaust emissions from construction vehicles
will occur during construction, but the public health impacts of these emissions will be
negligible. No operational air quality impacts of the project are anticipated. The wastewater
pump station will be located 200 feet or more from the nearest residence.
Induced urban growth will result in increased air pollutant emissions from vehicles and
certain industrial activities. Gaston County has exceeded EPA threshold criteria for air
pollutants during previous years, and requires annual emission testing of gasoline fueled
vehicles.
5.6. Noise Levels.
Residents adjacent to the project corridor may experience nuisance noise levels during
construction, which will be limited to daylight hours. Operational noise of the facility will be
negligible.
Induced urban growth will cause an increase in noise from vehicles and construction
activities. Residences along NC-27 are most likely to be affected.
5.7. Groundwater Resources.
The project area is almost entirely impervious, and all rainfall on the site is transported
through storm drains to surface streams. No impacts of the project on groundwater recharge
are anticipated.
5.8. Surface Water Resources.
Project construction will cause a temporary increase in turbidity and sediment load in
adjacent streams. These impacts will be minimized by employing standard erosion control
practices. An Erosion and Sedimentation Control Plan will be submitted to the DEHNR
Mooresville Regional Office for approval at least 30 days prior to construction.
No direct adverse operational impacts of the project on water quality are anticipated.
Impacts of the Mount Holly WWTP effluent on Lake Wylie are regulated by specific limits
established in the plant's NPDES discharge permit.
6

The project will deter new septic systems and reduce the number of existing ones in
the wastewater service area. Failing septic systems are a common source of surface water
pollution, especially in areas of clayey soils.
Induced urban growth may adversely affect surface water quality in several ways. An
increase in impervious surface area causes a corresponding increase in peak-stormflows,
exacerbating channel erosion. Base flows during dry weather are subsequently reduced,
causing small perennial streams to become intermittent,concentrating pollutants,and creating
high temperature and low-oxygen conditions. Destruction of riparian forests, culverts,
drainage improvements,and artificial channel stabilization may also contribute to water quality
degradation.
5.9. Introduction of Toxic Substances.
Potential sources of toxic substances during construction may include exhaust
emissions, oil, fuel, and other vehicle fluids. There are no known petroleum storage tanks or
facilities containing hazardous materials to be removed in the project area.
No releases of toxic substances are anticipated from operation of the project.
5.10. Eutrophication of Receiving Waters.
Nutrient loading to streams in the project area may temporarily increase due to soil
erosion during construction, but should be negligible provided that erosion control practices
are followed. In flowing streams, most sediment-associated nutrients remain bound to clay
particles where they contribute little to eutrophication. These nutrients generally become
bioavailable when they settle into the anaerobic hypolimnion of a seasonally stratified pond
or reservoir, such as Lake Wylie located one mile downstream of the project. Any additional
nutrient loading impacts from project construction will be negligible.
Nutrient loading from the Mount Holly WWTP is controlled by effluent limits specified
in the plant's NPDES discharge permit.
5.11. Jurisdictional Wetlands and Waters.
The final alignment best avoids the twelve wetlands in the project area. Preliminary
calculations indicate that the unavoidable wetland area affected is less than one acre, pending
COE verification.
Following construction, wetlands will be restored to pre-construction grade, and the
permanent mowed access corridor limited to 10 feet wide. Anti-seep collars will be installed
per DEM specifications to prevent the gravel-filled trench from draining the wetlands.
Induced development will cause further loss and degradation of wetlands throughout
the project service area. The rate and distribution of such losses cannot be predicted.
7

•
5.12. Fish and Aquatic Habitats.
Fish and other aquatic organisms may be temporarily affected by elevated silt loading,
turbidity, and silt-associated pollutants during construction. Clearing of riparian forests along
segments where steep slopes or other design factors preclude the preservation of a wide
buffer may cause permanent changes in stream habitat and water quality, thereby affecting
fish populations.
Induced development may further degrade aquatic habitats as discussed in section 5.8.
5.13. Wildlife and Terrestrial Habitats.
Habitat types disturbed by project construction are summarized in Table 1. The natural
forested community types are described in section 3.6.
High quality mesic forests in the project area contain canopy trees averaging 25 to 35
inches diameter at breast height (dbh) and regionally rare species such as bigleaf magnolia
(Magnolia macrophylla), nodding trillium (Trillium rugelli) and yellow lady slipper (Cypripedium
pubescens). Three such high quality segments occur between wetland F and wetland L along
South Stanley Creek.
High quality alluvial forests in the project corridor, with 25 to 35 inch dbh canopy
trees, are located in two segments along Dutchmans Creek between Main Street and the
Woodlawn Avenue pump station.
The project will cause fragmentation of forests along 14,400 feet of corridor, and will
disturb forest edge habitat along an additional 4,600 feet. The mowed corridor may promote
the success of invasive exotic species such as Chinese privet and Japanese honeysuckle,and
may deter certain wildlife species that require tracts of unbroken forest.
Induced urban growth will cause further loss of natural communities. The rate and
geographic distribution of such loss will depend on social and economic factors, and cannot
be predicted.
5.14. Rare and Protected Species.
The N.C. Natural Heritage Program has records of eighteen rare plant or animal species
from Gaston County. Four of these are either federally protected (E or T), federal candidates
(C1 or C2), or state protected (E, T, or SC) (Table 2).
For two of these species,the highfin carpsucker (Carpiodes velifer) and the bog turtle
(Clemmys muhlenbergii), there is no suitable habitat in the project area, and no adverse
impacts on these species are anticipated.
Suitable habitat for the loggerhead shrike (Lanius ludovicianus) occurs in fields and
pastures in the project area. No shrikes were detected during the field reconnaissance, and
the project will not significantly reduce suitable habitat.
8

•
Marginally suitable habitat for Georgia aster(Astergeorgianus) occurs along the edges
of mesic-dry forests, including edges of road or utility rights-of-way. The field reconnaissance
was too early in the season to reliably detect and identify Georgia aster. If present in the
project area,construction may destroy some individuals, but will create additional forest edge
habitat suitable for the species. Therefore, no adverse net impact is anticipated.
One unprotected rare species was encountered, the bigleaf magnolia (Magnolia
macrophylla). A population of this tree occurs along a 3,500 foot segment of the project
corridor between the Twin Brooks pump station and the mesic slope adjacent to wetland J
(Figure 2c). The greatest density and largest specimens are in the 1,000 foot segment
immediately north of the Duke Power/Gastonia raw water line ROW. Approximately fifty 4-
to 15-inch dbh trees will be eliminated; saplings less than 4 inches dbh were not counted.
Fewer and smaller specimens occur on the opposite bank of South Stanley Creek, but the
project engineers determined that construction on this side may not be feasible due to the
greater trench depth required.
6.0. MITIGATIVE MEASURES.
The project engineers revised their preliminary sewer alignment following RJG&A's
delineation of jurisdictional wetlands, so that the final proposed design avoids and minimizes
wetland impacts to the extent practicable. Unavoidable impacts include disturbance of less
than 1.0 acre of headwater wetlands, pending COE verification, and can be permitted under
Section 404 Nationwide Permit 12 and its corresponding Section 401 General Water Quality
Certification. Compensatory mitigation is not likely to be required, provided that conditions
of the Nationwide Permit are met.
Impacts of induced development will in part be mitigated by municipal and county
water supply watershed protection ordinances. Other than the buffers required by these
ordinances, which restrict construction but do not require maintenance of natural vegetation,
no local program for riparian corridor protection exists.
9

7.0. LITERATURE CITED.
Woody, J.W. 1989. Soil survey of Gaston County, North Carolina. U.S.Department
of Agriculture, Soil Conservation Service, Raleigh, N.C. 118 p. + maps.
Daniel,-C.C. III and R.A. Payne. 1990. Hydrogeologic Unit Map of the Piedmont and
Blue Ridge Provinces of North Carolina. U.S. Geological Survey Water Resources
Investigations Report 90-4035. Raleigh, N.C. 1 p.
Environmental Laboratory. 1987. Corps of Engineers Wetlands Delineation Manual,
Technical Report Y-87-1. U.S. Army Engineer Waterways Experiment Station, Vicksburg,
Miss. 100 pp. + appendices.
N.C. Division of Land Resources. 1985. Geologic map of North Carolina. N.C.
Department of Natural Resources and Community Development -Geological Survey, Raleigh,
N.C. 1 p.
Schafale, M.P. and A.S. Weakley. 1990. Classification of the Natural Communities of
North Carolina - Third Approximation. North Carolina Natural Heritage Program, Division of
Parks and Recreation, NC DEHNR, Raleigh, N.C., 325 pp.
10

Table 1. Land Use and Habitat Types in the Project Construction Corridor.
HABITAT TYPE LENGTH (feet)
Floodplain forests (Alluvial, Levee, and Bottomland Forest)
Edge -- Adjacent to existing road or utility 1,300
Unbroken forest 9,000
Mesic Forests (Mesic Mixed Hardwood and Basic Mesic Hardwood)
Edge -- Adjacent to existing road or utility 1,400
Unbroken forest 5,400
Dry-Mesic Oak/Hickory Forest
Edge -- Adjacent to existing road or utility 1,900
Unbroken forest 0
Floodplain scrub (marsh, old field, saplings, wooded pasture) 3,500
Upland scrub (mesic to dry old field, saplings, wooded pasture) 900
Lawns, mowed fields, open pasture 2900
Roads, mowed utility right-of-way 800
Stream crossings 200
11

Table 2. Rare and Protected Species Known from Gaston County.
SCIENTIFIC AND STATE FED. STATE GLOBAL
COMMON NAME PROT. PROT. RANK RANK
Gaston
Vertebrates
CARPIODES VELIFER SC S2 G4G5
HIGHFIN CARPSUCKER
CLEMMYS MUHLENBERGII T C2 S2 G3
BOG TURTLE
LANIUS LUDOVICIANUS LUDOVICIANUS SC 3C S3B,S3 G5T5
LOGGERHEAD SHRIKE
Invertebrates
AMBLYSCIRTES REVERSA SR - S3? G4
REVERSED ROADSIDE SKIPPER
AUTOCHTON CELLUS SR - S1S2 G4
GOLDEN-BANDED SKIPPER
ERYNNIS MARTIALIS SR - S3? G4
MOTTLED DUSKY WING
POLITES MYSTIC SR - SR G5
LONG DASH
Vascular plants
AMORPHA SCHWERINII SR - S3 G3
PIEDMONT INDIGO-BUSH
ASPLENIUM BRADLEYI C - Si G4
BRADLEY'S SPLEENWORT
ASTER GEORGIANUS C C2 S2 G2G3
GEORGIA ASTER
FOTHERGILLA MAJOR C - S2 G3
LARGE WITCH-ALDER
JUNIPERUS COMMUNIS VAR DEPRESSA C - Si G5T5
DWARF JUNIPER •
MAGNOLIA MACROPHYLLA SR - SIS2 G5
BIGLEAF MAGNOLIA
NESTRONIA UMBELLULA SR 3C S3 G4
NESTRONIA
QUERCUS ILICIFOLIA SR - S1 G5
BEAR OAK
QUERCUS PRINOIDES C - SH G5
DWARF CHINQUAPIN OAK
SMILAX BILTMOREANA C - S3 G3
BILTMORE CARRION-FLOWER
THERMOPSIS MOLLIS SENSU STRICTO SR - S2? G3G4
APPALACHIAN GOLDEN-BANNER
Natural communities
BASIC OAK—HICKORY FOREST - - S3 G4
DRY OAK—HICKORY FOREST - - S4 GS
DRY-MESIC OAK—HICKORY FOREST - SS GS
GRANITIC FLATROCK S2 G3
LOW ELEVATION ROCKY SUMMIT - - S2 G2
NC NATURAL HERITAGE PROGRAM, NC DIVISION OF PARKS AND RECREATION,DEIINR FEBRUARYIM.,6
Data compiled using BCD software developed by The Nature Conservancy.
12

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A'

WASTEWATER INTERCONNECT AGREEMENT

NORTH CAROLINA WASTEWATER INTERCONNECT
AGREEMENT
GASTON COUNTY
THIS AGREEMENT, Made and entered into this /,rh day of
March , 1996 , by and between the CITY OF MOUNT MOLLY,
a municipal corporation having a charter granted by the State of
North Carolina, hereinafter referred to as the "City" ; and the
TOWN OF STANLEY, a municipal corporation having a charter granted
by the State of North Carolina, hereinafter referred to as the
"Town" ;
WITNESSETH:
WHEREAS , the Town wishes to assure itself of adequate wastewater
treatment capacity for present and future development by
utilizing a portion of the capacity of the present and
future wastewater facilities owned and operated by the City;
and,
WHEREAS , City has agreed to allocate to Town a portion of the
wastewater treatment capacity at City' s present or future
wastewater plants under the terms and conditions sec forth
herein.
NOW, THEREFORE, in consideration of the terms, conditions, and
covenants hereinafter sec forth herein, it is agreed between the
parties as follows:
PURPOSE : The ourtcse of this agreement is to construct a
sanitary sewer _nterte':zor , tie-ins, and appurtenances,
long : ghway 2; and . outh Stanley Creek to interconnect _h_
wastewater systems of the municipalities , and to thereafter
orovide For an agreement whereby City Will accept and treat
a portion of Town' s wastewater .
2. LEAD AGENCY: The City shall serve as lead agency for the
construction of the sewer interconnect project (hereinafter
referred to as ache Project" ) , and agrees to commence and
complete the Project within a reasonable time after
execution of this agreement, following the funding schedule
as established from time to time by the Project Engineer.
The schedule for the Project shall be established by the
project engineer and shall be approved by the
municipalities. The Town will have the right to inspect
documents , ; materials, papers and other related items at any
point during the Project, with proper notification to the
City, and the City shall have the project,'engineer provide
copies of all correspondence, reports, documents and other
related project materials to the Town.
3 . PROJECT EN,INEER: The municipalities approve the employment
of the engineering firm of W. K. Dickson, Inc. as project

•
engineer, and shall use said engineering firm or such other
firm as the parties may hereafter agree. The Project
Engineer selected by the parties must agree that engineering
costs are -ultimately borne by Town and that the Project
Engineer will not pursue reimbursement from City except to
the extent funds are provided to City from Town.
4 . DESCRIPTION: The City agrees to construct or let contracts
for the construction of the following described facilities :
A. Sewer Lines of the approximate diameter and lineal
feet as shown on Exhibit A.
B. Master Meter: connection of the municipal sewer
systems will be through a master meter near Highway 27
at or near the Duke Power right-of-way, south of the
Twinbrook Industrial Park.
C. Pumo Stations : additions and improvements will be
made to City' s existing wastewater pump stations
located on Woodlawn Avenue and on Dutchman' s Creek.
The pump stations will be enlarged and upgraded to
accept the additional flow from Town and from increased
needs in City' s service area. The approximate cost of
such work is shown on Exhibit A.
5 . DESIGN: The proposed sewer lines, pump station improvements
master meter, and appurtenances, shall be designed and
constructed in accordance with the specifications of the
municipalities. The project engineer shall be employed
through the City to complete the design and specifications
for the project and to conduct other related work necessary
for the successful completion of the project. Plans and
specifications shall be approved by the municipalities prior
to being let for bid. The City shall provide to the Town a
coc_ v of the contt:=ior. plans and a set of as-built clans
at the coracle:ion of :he Project . 3:.ds for the Project will
not be awarded until reviewed and approved by both carties .
6 . FINANCING :
A. The project cost for the aforementioned facilities is
estimated to be two million, eight hundred thousand seven
hundred ($2,800 ,700 .00 ) Dollars. The financing of the
Project is to be provided solely by the Town and is
contingent upon the Town obtaining the following agreements
pertaining to financing:
1) The interlocal sewer interconnect agreement to be
entered into by Gaston County and the Town.
2) Approval of the sewer interconnect by the North
Carolina Department of Environment, Health and Natural
Resources (NCDEHNR) Division of Environmental
Management.
3 ) Funding approval by the Construction Grants and
Loans Section of NCDEHNR Division of Environmental
Management.
B. City will not incur any expense regarding the design or
construction of the Project, until the Town has provided
2

satisfactory evidence to City chat Town has the availability
of funds necessary to complete the Project and reimburse
City for such expenses . During the performance of this
agreement, the City will submit monthly payment requests to-
the Town for reimbursement of eligible Project expenses ,
which Town will reimburse within thirty ( 30 ) days of
receipt . All change orders will be approved by both
municipalities. Eligible Project expenses shall include
design services, rights-of-way expenses , legal fees, and
construction costs and other expenses reasonably necessary
to carry out the terms of this agreement. Design services
are to include preparing plans and specifications,
surveying, easement mapping, contract administration and
construction observation services.
7. CONSTRUCTION SCHEDULE AND INSPECTION: Due to the funding_ of
the Project, the Project will be developed according to the
following guidelines:
The City agrees co commence the Project within a reasonable
time after execution of this Agreement. The Project
schedule will be established by the Project Engineer and
shall be approved by the Town and the City. The Town has
bond funding which requires all money be spent and the
Project closed out by May 31, 1998 . The City will schedule
design, bidding and construction co complete all
construction by December 31, 1997.
8 . RIGHTS OF WAY: The City shall obtain all rights-of-way and
encroachment agreements as necessary for chat portion of the
Project to be constructed east of the location of the Master
Meter, and Town shall obtain all such rights-of-way and
encroachment agreements for that cortion west of the
location of the Master Meter .
9 . OWNERS ? ,
OPER AT___. , AND MAINTENANCE:
A. Upon final c: _ ' cr" cn of :ne P=ojecz, as cam'"' 'ar°
the Project Engineer, Town shall own, operate and maintain
that portion of the Project lying west of the Master Meter.
All other portions of the Project and appurtenances thereto
including the Master Meter and pump stations shall be owned,
operated, and maintained by City. Notwithstanding the
foregoing, however, if Town shall obtain funding which
requires Town to retain ownership of the sewer .outfall line,
then it is agreed chat Town shall have ownership of said
outfall line, which would otherwise belong to City, and
shall lease the same to City for One ($1. 00) Dollar per year
until such time as Town may convey ownership of the same to
City without violating the terms of its funding. The
aforesaid sewer line will then be conveyed to City without
charge.
B. City shall have the exclusive right to allow sewer taps
into that portion of the sewer outfall line belonging to
City or leased by City from Town. Town shall have the
exclusive right to allow sewer taps into that portion of the
sewer outfall line belonging to Town and not leased to City,
3

subject, however, to the service area limitations set forth
in Paragraph 10 below.
C. If either municipality shall hereafter annex a water or
sewer customer then being served by the other municipality,
then such annexing municipality must provide for such water
and/or sewer service through its own facilities ( i . e. , sewer
lines, pump stations ) within one (1 ) year of the effective
date of such annexation.
10 . WASTEWATER SERVICE AREA: It is agreed that wastewater
passing through the master meter to be treated by the City
shall only contain wastewater originating from sources
within the resent or future corporate limits of the Town,
the present or future extraterritorial zoning jurisdiction
of the Town, and those sources presently served by the Town
located outside bcth the present corporate and
extraterritorial zoning jurisdiction of the Town. The Town
agrees that at no time will it provide sewer service to any
areas except those listed in this paragraph 10 if such
service should generate wastewater flowing through the
Master Meter to the City' s wastewater treatment facility,
without prior written consent of City.
11. WASTEWATER TREATMENT: City presently utilizes approximately
65% of the treatment capacity at its existing wastewater
treatment facility. City agrees that it will make available
to Town under the terms of this agreement sufficient
capacity at its present wastewater treatment plant to treat
up to 200 ,000 gallons per day of wastewater from the Town.
City further agrees not to unreasonably deny to Town
additional treatment capacity within its current wastewater
treatment plant , ?rovided that such additional Wastewater
does not jeo ar:_ze City' s capacity to provide service
its then existing service area. Town agrees co pay cc
for wastewater crew::lent at City' s present facility a rate
equal to 125% of City' s inside sewer rate as may be
established by Ci-,J from time to time. This rate shall
continue in effect until changed as hereinafter set forth.
The City will provide meter readings to Town on or about the
first day of each month f•lr the preceding month ' s usage, and
Town will pay to the City its sewer charges within 15 days
of the receipt of such billing. Any late payment not
received 15 days of said billing will carry a 1-1/2% lace
payment charge.
12. FUTURE EXPANSION OF CITY'S TREATMENT FACILITY: City' s
current facility was completed in 1976 .. Advances in
wastewater treatment technology, additional treatment
requirements proposed by the State, and increased demand are
all factors co be considered by City regarding a future
upgrade and expansion (hereafter referred to as "U&E") of
its wastewater facility. The City proposes to expand and
upgrade its facility when any of the following events occur:
1. The flow capacity of the facility reaches 90% of
• its capacity;
A

2. The City' s NPDES permit limits require an upgrade;
3 . At such other time as the City may deem it
appropriate.
Such a U&E would include but not be limited to chose
improvements sec forth in a facilities study entitled
"Wastewater Treatment Plan Expansion Study" , performed by W.
K. Dickson, Engineers, dated January 1995 , a copy of which
is retained by both parties.
13 . PARTICIPATION BY TOWN UPON U&E OF CITY'S TREATMENT FACILITY:
In consideration of the mutual agreements contained herein,
the City agrees to include in the U&E . 5 million gallons (or
such greater amount as Town may request prior to preliminary
design) of hydraulic capacity and a proportionate .share of
the U&E treatment capacity (i.e. , capacity to treat BOD,
TSS, nutrients, and other regulated constituents ) for use by
Town, and Town agrees to accept and pay for the same under
the terms and conditions hereinafter set forth.
A. City will notify Town in writing at such time as
City desires to begin engineering design for the U&E of
its wastewater treatment plant.
B. The portion of the U&E cost to be paid by Town
will be equal to the product of the entire U&E cost
multiplied by a fraction, the numerator of which is .5
million gallons per day (or such greater volume of
capacity as Town may timely elect) , and the denominator
of which is equal to the increased treatment capacity
of the U&E (as compared to City' s present capacity per
day at its present treatment facility) expressed in
million gallons :PP, day. By wav o= 1 ?',_=c_t.._cr.
Stanley' s share of :he U«= cost would be $2 .
according to the following example :
(U&E cost) $10M x 0 . 5 MGD ( reserve for Town) = $2. ^_
2 . 0 MGD (increased cap . )
C. The Town shall pay to the. City the pro-rata share
of each installment as the installments come due on
City' s bond indebtedness incurred to construct the U&E.
By way of illustration, if the U&E cost is $10 million
and Town' s portion of these costs is $2.5 million, Town
would pay to City twenty-five percent of each
installment. If City should pay off the bond issue
early, Town shall nevertheless continue to make
installments according to the initial amortization
schedule, unless the parties shall agree to a different
amortization. Town may, however, pay off their portion
of the indebtedness at any earlier date as Town may
elect.
D. Town' s rate for wastewater treatment by City shall
be reduced from 125% of City' s inside rate as the same
may be changed from time to time to 100% of the City' s
5

•
inside rate beginning on the first day of the utility
billing cycle immediately following Town' s first
payment to City of its portion of City' s bond payment
or at such time as the U&E is completed and in use,
- - whichever shall occur first. Thereafter, Town's rate
shall continue to be 100% of the City' s inside rate as .
the same may be from time to time established until
such time as Town has paid City for its portion of the
plant L&E; thereafter the Town' s rate for sewer
treatment by City will be 125% of the rate charged to
City' s inside customers as the same may be from time to
time established. In the event that Town should be in
default of its obligation to pay its pro-rata share of
each installment of the bond indebtedness, then Town' s
rate during such default shall be increased to 125% of
City' s inside rate, and City may, in addition, pursue
such legal recourse as may be available to enforce the
terms of this agreement..
E. The parties expressly agree that Town will be
paying a fractional amount as set forth above based
• upon the entire cost of the U&E and not solely the
additional costs of including into the U&E Town' s
reserved capacity. It is for this reason that the
Town' s sewer rate charged by the City is decreased
until such time as Town has paid for its portion of the
Plant U&E.
14. TERM OF AGREEMENT: This agreement shall continue for a term
of forty ( 40 ) years from and after the date of the execution
hereof.
15 . SEWER USE REGULATIONS: Town agrees that it will keep in
force at all times and enforce a Sewer Use Ordinance
accroved by the State of North Carolina. This ordinance
would be the same or similar to that 1n e==a'"- within the
City of Mount E al+ .• At all times during this A_greemen
City will issue a sewer use _ermit to Town in accordance
with the City' s sewer use ordinance and regulations and
ons
requirements �as may be promulgated from time to time by the
State of North Carolina Department of Environment, Health
and Natural Resources (DEHNR) for significant industrial
users as defined by the DEHNR. During the term of this
Agreement, at Town' s election, City will administer Town' s
pretreatment program pertaining to those, industries
b
discharging sewer through the Master Meter to e treated by
City. Town will reimburse City the reasonable cost
associated with administering Town' s pretreament program.
Town agrees to submit to the City all applications for
industrial discharges which pass through the master meter to
be treated by the City. No industrial discharge permits will
be issued by Town until reviewed and approved by City. The
City will review and approve or disapprove permits and, if
necessary, perform a headworks analysis to determine the
City' s ability to treat such wastewater within Town' s •
remaining reserved capacity. City will approve such permits
6

•
•
if Town then has sufficient remaining treatment capacity
within its reserve. The City will approve such permit on
the same basis as it approves similar applications for
permits by industrial users within the City of Mount Holly,
taking in consideration the proportionate amount of the
wastewater treatment capacity reserved by the City for the
Town both relating to its current wastewater facility and
any upgraded or expanded facility. City will not violate
the provisions of this paragraph for any purpose including
the purpose of inducing industries to locate within City.
16 . TOWN'S FUTURE SEWER NEEDS : At such future date as Town' s
wastewater flow based on a yearly average exceeds 80% of the
capacity purchased by Town in the U&E, then Town should
undertake negotiations for additional treatment capacity.
City will take in consideration any unused plant-capacity
then present within the U&E and the needs of City, Town, and
any other parties sharing such capacity. City will
thereupon allocate to Town such unused capacity as City may
• elect in its sole discretion. The rate for such additional
capacity shall be negotiated between the parties . If such
unused capacity is not sufficient to provide Town with sewer
treatment commensurate with its demand, then City agrees to
construct additional capacity at its wastewater facility
prior to Town' s usage exceeding 90% of its reserved capacity
in the U&E, provided that Town bear all expense relating to
an additional U&E for Town' s benefit.
IN WITNESS WHEREOF, the parties hereto have caused this
Agreement to be signed by their duly authorized representatives
the day and year first above written.
CITY OF `CUNT HOLLY
•i rank E. McLean,, Mayor
Attest:
C51422,04.GA.ctfdi
CitClerk
( seal )
•
TOWN OF STANLEY
ail Et `Bro herton, '3a or
Attest:
City Clerk
( seal )
Rn203
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CONSULTING ENGINEERS
WKD#: / e I`S-/ IO COMPUTED BY: /I/L a) DATE: '-+ I3.-. A4.
DESCRIPTION: CHECKED BY: DATE: /17- -
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STANLEY WASTEWATER TREATMENT PLANT PEAK FLOWS
JAN 1994 MAR 1994 MAY 1994
PEAK AVG PEAK PEAK AVG PEAK PEAK AVG PEAK
HR DAY FACTOR HR DAY FACTOR HR DAY FACTOR
DAY
1 0.600 0.480 1.25 0.500 0.344 1.45 0.425 0.421 1.01
2 0.550 0.384 . 1.43 1.375 0.943 1.46 0.500 0.451 1.11
3 0.625 0.405 1.54 1.300 1.267 1.03 0.550 - 0.417 1.32
4 1.200 1.105 1.09 0.600 0.482 1.24 0.675 0.561 1.20
5 0.750 0.745 1.01 0.500 0.377 1.33 0.525 0.398 1.32
6 0.700 0.569 1.23 0.525 0.390 1.35 0.600 0.392 1.53
7 0.700 0.506 1.38 0.500 0.354 1.41 0.525 0.406 1.29
8 0.750 0.549 1.37 0.600 0.356 1.69 0.475 0.415 1.14
9 0.575 0.418 1.38 0.600 0.349 1.72 0.500 0.395 1.27
10 0.475 0.459 1.03 0.750 0.643 1.17 0.475 0.446 1.07
11 0.425 0.389 1.09 0.625 0.520 1.20 0.450 0.397 1.13
12 1.125 0.668 1.68 0.625 0.476 1.31 0.475 0.432 1.10
13 0.375 0.610 0.61 0.550 0.477 1.15 0.425 0.388 1.10
14 0.625 0.411 1.52 0.650 0.387 1.68 0.550 0.457 1.20
15 0.500 0.464 1.08 0.600 0.464 1.29 0.425 0.350 1.21
16 0.450 0.445 1.01 0.600 0.427 1.41 0.450 . 0.437 1.03
17 0.750 0.321 2.34 0.575 0.467 1.23 0.450 • 0.400 1.13
18 0.600 0.567 1.06 0.625 0.361 1.73 0.500 0.434 1.15
19 0.500 0.411 1.22 0.575 0.453 1.27 0.525 0.384 1.37
20 0.475 0.348 1.36 0.600 0.477 1.26 0.500 0.377 1.33
21 0.475 0.375 1.27 0.600 0.470 1.28 0.475 0.459 1.03
22 0.425 0.355 1.20 0.750 0.456 1.64 0.450 0.401 1.12
23 0.500 0.467 1.07 0.625 0.432 1.45 0.525 0.429 1.22
24 0.400 0.347 1.15 0.625 0.468 1.34 0.450 0.452 1.00
25 0.450 0.393 1.15 0.575 0.476 1.21 0.500. 0.406 1.23
26 0.550 0.424 1.30 0.575 0.376 1.53 0.525 0.437 1.20
27 0.500 0.403 1.24 0.750 0.454 1.65 0.500 0.454 1.10
28 1.000 0.591 1.69 0.750 0.621 1.21 0.425 0.387 1.10
29 0.500 0.437 1.14 1.300 1.242 1.05 0.375 0.353 1.06
30 0.450 0.436 1.03 0.750 0.650 1.15 0.475 0.462 1.03
31 0.425 0.381 1.12 0.650 0.497 1.31 0.475 0.365 1.30
AVG 0.479 AVG 0.521 AVG - 0.418
PEAK = 1.259 PEAK = 1.361 PEAK = 1.174
Page 1

STANLEY WASTEWATER TREATMENT PLANT PEAK FLOWS
JULY 1994 SEP 1994
PEAK AVG PEAK PEAK AVG PEAK
HR DAY FACTOR HR DAY FACTOR
DAY
1 0.475 0.456 1.04 0.650 0.514 1.26
2 0.450 0.431 1.04 0.625 0.582 1.07
3 0.650 0.432 1.50 0.650 0.449 1.45
4 0.550 0.428 1.29 0.475 0.444 1.07
5 0.375 0.332 1.13 0.625 0.462 1.35
6 0.550 0.271 2.03 0.400 0.296 1.35
7 0.500 0.436 1.15 0.750 0.438 1.71
8 0.375 0.339 1.11 0.750 0.491 1.53
9 0.475 0.384 1.24 0.700 0.499 1.40
10 0.475 0.425 1.12 0.525 0.455 1.15
11 0.500 0.449 1.11 0.450 0.415 1.08
12 0.375 0.329 1.14 0.800 0.470 1.70
13 0.375 0.354 1.06 0.475 0.413 1.15
14 0.500 0.382 1.31 0.450 0.419 1.07
15 0.550 0.372 1.48 0.700 0.478 1.46
16 0.525 0.497 1.06 0.450 0.446 1.01
17 0.500 0.435 1.15 0.500 0.457 1.09
18 0.500 . 0.310 1.61 0.525 0.456 1.15
19 0.625 0.406 1.54 0.500 0.485 1.03
20 0.625 0.439 1.42 0.475 0.450 1.06
21 0.550 0.489 1.12 0.550 0.367 1.50
22 0.475 0.404 1.18 0.400 0.376 1.06
23 0.650 0.435 1.49 0.500 0.414 1.21
24 0.550 0.441 1.25 0.575 0.347 1.66
25 0.500 0.487 1.03 0.750 0.707 1.06
26 0.375 0.361 1.04 0.500 0.388 1.29
27 0.425 0.485 0.88 0.475 0.439 1.08
28 0.450 0.445 1.01 0.500 0.436 1.15
29 0.500 0.429 1.17 0.550 0.447 1.23
30 0.475 0.385 1.23 0.500 0.442 1.13
31 0.475 0.497 0.96
AVG 0.412 AVG 0.449
PEAK = 1.222 PEAK = 1.251 1.254
Page 2

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FLUIDYNE JET AERATION CALCULATIONS
PROJECT: Jet Aeration-Aerobic Digester
Location: Stanley, North Carolina
DATE&TIME: April 25, 1996
INFLUENT CONDITIONS PI#1
Site Elevation (in feet) 500
Lbs of Dry Solids Per Day 800 >�-�—
Lbs of 02/LB of VSS 1.42
• Actual Oxygen Demand (lb 02/d)Total 1138
Alpha 0.7
Beta 0.95
Theta 1.024
Operating Dissolved oxygen(mg/I) 2
Clean Water oxygen sat. at op.temp(mg/I) 9.09
Clean Water oxygen sat. at std.temp(mg/1) 9.09
Clean water 02 sat, std temp,mid depth(mg/I) 11.50
Std.condition ambient pressure (psia) 14.7
Oper.condition ambient pressure (psia) 14.6
Wastewater temperature(c) 20
SOR/AOR ratio 1.86
Standard Oxygen Demand (lb 02/d)total 2109
Standard Oxygen Demand (lb 02/nr) 117
Pounds of oxygen/pound of air 0.23 •
Clean water efficency(%) 23
Pounds of air/cubic foot of air 0.075
Aeration hours per day 18
Air flow rate(scfm) 492
Air pressure losses(lines and nozzle) 0.7
Maximum air pressure (psig) 7.63
No. of Tanks 1
No. of Headers 1
Diameter(ft) 64
Top of Wall(ft) 20
Top water level (ft) 18
Tank Volume Lmgd) �___ __�_ _r_ 0.433

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/8 ©r 2
Page 2
PROJECT: Jet Aeration-Aerobic Digester
EQUIPMENT SELECTION
Air flow per nozzle (scfm) 35
Number of nozzles required 14.06
Number of nozzles provided
Actual airflow per nozzle (scfm) 30.76
Number of nozzles per header 16.00
Blower capacity.provided_(!cfmlper header_ __µ_560
--W�..._ pax, Lis
POWER CONSUMPTION CALCULATIONS $t�'L/
Electric motor efficiency 0.9
Pump efficiency 0.7 .�
Blower efficiency 0.57: a O HP la gt
Pump horsepower, BHP/header
Total Blower horsepower,BHP Z5 <-; 7 Rio welt /4

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CONSULTING ENGINEERS
wIm#: '(Q 45-1. 10 C COMPUTED BY ML(.1.) DATE: 5'l3-9Co
DESCRIPTION: rnr Lt 5'T" CHECKED BY 6W DATE: GJ-zz�
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OPTION 3: DESIGN EXIST NEW
EXIST NEW LENGTH or MIN DESIGN SS CAP SS CAP TOTAL
SS SS_ (FT) SLOPE ADF (1/2 FULL) (1/2 FULL) NEW& EXIST
LINE 6 to 5: - 8" SS 4,000 0.007 0.310 0.330 0.330
5 to 4: 8" SS - 0.310 0.045 0.045
4 to 3: - 18" SS 13,500 0.001 0.967 1.180 1.180
3 to 2: 15" SS 12" SS 2,780 0.0015 1.190 0.810 0.450 1.260
7 to 1A: 12" SS - 2,000 0.0024 0.490 0.570 0.570
1A to 1: 18" SS - 4,900 0.0019 0.634 1.490 1.490
2 to 9: - 21" SS 3,790 0.0012 1.780 1.705 1.705
1 to 9: 18" SS 940 0.0012 1.126 1.180 1.180
DCPS 4,150 GPM
4,750 GPM
A.
Mike L. Wolfe Page 1
5/10/96

6 01 e5
OPTION 3: 2.0 PF ADF @ PEAK @
EXIST ADF FUTURE ADF PEAK 0.5 MGD 0.5 MGD
LINE 3 -4:
STL 450,000 854,380 1,708,760 500,000 1,000,000
J 45,000 112,400 224,800 112,400 224,800
495,000 966,780 1,933,560 612,400 1,224,800
LINE 2 - 3:
STL 450,000 854,380 1,708,760 500,000 1,000,000
45,000 112,400 224,800 112,400 224,800
K' 45,900 114,700 229,400 114,700 229,400
l 31,200 109,200 218,400 109,200 218,400
572,100 1,190,680 2,381,360 836,300 1,672,600
LINE 2 - 9:
STL 450,000 854,380 1,708,760 500,000 1,000,000
45,000 112,400 224,800 112,400 224,800
K 45,900 114,700 229,400 114,700 229,400
l 31,200 109,200 218,400 109,200 218,400
C ✓ 30,300 92,800 185,600 92,800 185,600
E' 44,700 46,000 92,000 46,000 92,000
F 152,000 380,000 760,000 380,000 760,000
799,100 1,709,480 3,418,960 1,355,100 2,710,200
LINE 1A - 1:
D 75,800 82,000 164,000 82,000 164,000
g ' 351,500 407,500 815,000 407,500 815,000
G ,/ 143,300 145,000 290,000 145,000 290,000
570,600 634,500 1,269,000 634,500 1,269,000
LINE 7 - 1A:
p 75,800 82,000 164,000 82,000 164,000
B 351,500 407,500 815,000 407,500 815,000
427,300 489,500 979,000 489,500 979,000
LINE 1 - 9:
p 75,800 82,000 164,000 82,000 164,000
B 351,500 407,500 815,000 407,500 815,000
C 30,300 92,800 185,600 92,800 185,600
G 143,300 145,000 290,000 145,000 290,000
A v 132,700 135,000 270,000 135,000 270,000
H 201,500 263,300 526,600 263,300 526,600
935,100 1,125,600 2,251,200 1,125,600 2,251,200
DCPS:
STL 450,000 854,380 1,708,760 500,000 1,000,000
45,000 112,400 224,800 112,400 224,800
Mike L. Wolfe Page 1 5/10/96

K 44,800 111,900 223,800 111,900 223,800
I 31,200 109,200 218,400 109,200 218,400
E 44,700 46,000 92,000 46,000 92,000
F 152,000 380,000 760,000 380,000 760,000
p 75,800 82,000 164,000 82,000 164,000
B 351,500 407,500 815,000 407,500 815,000
C 30,300 92,800 185,600 92,800 185,600
G 143,300 145,000 290,000 145,000 290,000
A 132,700 135,000 270,000 135,000 270,000
H 201,500 263,300 526,600 263,300 526,600
1,702,800 2,739,480 5,478,960 2,385,100 4,770,200
/DD / 6
3800 Mh1) 3 3 t p
Mike L. Wolfe Page 2 5/10/96

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1--c1C.0 201 APPROVED NEW
PROJ FLOWS CHANGES PROJ FLOW
(GPD) (GPD) (GPD)
a. Existing Residential 242,900 242,900
b. Existing Commercial 63,500 63,500
c. Existing Industrial 109,700 (40,000) 69,700
d. Non-Excessive Ill 179,000 + 12,900 191,900 191,900
e. Residential Growth (70 GPDPC x 1372 People) 96,040 96,040
f. Commercial Growth (15 GPDPC x 1372 People) 20,580 20,580
g. Unspecified Industrial Growth 0.1 x (a+b+c) 46,110 (4,000) 42,110
h. Specified Industrial Growth 280,000 (180,000) 100,000
i. Planned Residential Growth Outside Stanley 97,650 (70,000) 27,650
TOTAL: 1,148,380 (294,000) 854,380

. 11 /9 01)
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ti
16-May-96 I01:40 PM 23
DESIGN FLOW 3,310 gpm
C-FACTOR 120
LINE SIZE (IN) 14
6.90
LINE: FORCE MAIN 0.107
EQUIVALENT LT OF PIPE= 9,045 12.73
STATIC HEAD - MIN 0 0 0
- MAX 610 560 50
TOTAL HEAD (TDH)
MIN 0
MAX 165
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}}.. \�� , \}:v,•. \\y•:, 4:a.;.:• :"�`,} }:;:ia�:ii:::vr'r.{ •tit;t;}::•ii:i'{'J' };u.�{{{;7�t} ii
v F .t. ... at ' �
•
0 0.00 0.00 0 50 0 50
500 0.38 3.48 0 50 0 53
1,000 1.39 12.55 0 50 0 63
1,500 2.94 26.59 0 50 0 77
2,000 5.01 45.30 0 50 0 95
2,500 7.57 68.48 0 50 0 118
3,000 10.61 95.98 0 50 0 146
3,500 14.12 127.69 0 50 0 178
4,000 18.08 163.52 0 50 0 214
4,500 22.49 203.37 0 50 0 253
5,000 27.33 247.19 0 50 0 297
3,310 12.73 115.15 0 50 0 165
Flow (GPM) 3,310 1,655 DUTCHMAN CREEK PUMP STATION - OPTION III
C-Factor 120 FORCE MAIN
Pipe Size (in) 2 3 4 6 8 14 14 14
Velocity (fps) 337.90 150.18 84.48 37.54 21.12 3.45 3.45 6.90
V2/2g 5.252 2.334 1.313 0.584 0.328 0.054 0.054 0.107
Ft of Pipe 0 0 0 0 0 0 0 8,990
Entrance Loss 0 0 0 0 0 0 0 1
Exit Loss 0 0 0 0 0 0 0 1
Enter # 90's 0 0 0 0 0 0 0 2
Tee (str) 0 0 0 0 0 0 0 0
Tee(turn) 0 0 0 0 0 0 0 0
Check Valve 0 0 0 0 0 0 0 1
Gate Valve (open) 0 0 0 0 0 0 0 1
Plug Valve (open) 0 0 0 0 0 0 0 0
Loss 0.00 0.00 0.00 0.00 0.00 0.00 0.00 115.15
Total Loss: 115.15

t • 1 ZS
_ 24 o
OPTION III - DCPS
HAZEN-WILLIAMS FORMULA:
MAX MIN
DESIGN FLOW (GPM) 3310 STATIC HEAD= 50 50
C-FACTOR 120 TDH= 164 164
LINE SIZE (IN) 14 PUMP EFF.= 80% 80%
VELOCITY (fps) 6.90 BHP= 172 172
V2/2G 0.107
HEAD LOSS / 1,000 FT 12.73
LENGTH OF LINE 8990 COST/KWH= $0.08
TOTAL FRICTION LOSS 114.46 OPER-TIME/HR= 15 MIN
TDH 164 POWER COST= $9,383 /YR

Z/� "
2 of
OPTION III - DCPS
HAZEN-WILLIAMS FORMULA:
MAX MIN
DESIGN FLOW (GPM) 3800 STATIC HEAD= 50 50
C-FACTOR 120 TDH= 198 198
LINE SIZE (IN) 14 PUMP EFF.= 80% 80%
VELOCITY (fps) 7.92 BHP= 237 237
V2/2G 0.123
HEAD LOSS / 1,000 FT 16.44
LENGTH OF LINE 8990 COST/KWH= $0.08
TOTAL FRICTION LOSS 147.80 OPER-TIME/HR= 15 MIN
TDH 198 POWER COST= $12,955 /YR
,