20080390 Ver 1_401 Application_20080308

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D I C I<SO ICI
community infrastructure consultants
February 29, 2008
NC Division of Water Quality
401 Oversight/Express Permitting Unit
Mail Service Center 1650
Raleigh, NC 27699-1650
Attention: Mr. Ian McMillian
Re: Killian Creek Wastewater Treatment Plant
& Gravity Sewer, Force Mains and Pump Stations
Lincoln County
Lincoln County, North Carolina
WKD #30500.00.CL
Dear Mr. McMillian:
0 S 0 3 9 0
Attached please find a courtesy 404/401 Pre-construction Notification for the Killian
Creek Wastewater Treatment Plant, Gravity Sewer, Force Main, and Pump Station project
in southeastern Lincoln County, NC. As the attached Finding of No Significant Impact
(FONSI) states, the project is almost entirely funded a Revolving Loan Fund Grant
administered through NCDWQ's Construction Grants and Loans Section.
We're providing this courtesy PCN for Phase I of the funded construction for USACE's
and DWQ's records.
Should you have any questions regarding this document, Phase I, or anything else, please
contact myself or Ward Marotti in WK Dickson's Watershed Sciences Group (919-782-
0495, [e-mail]).
appreciate your work to protect Waters of the State and look forward to working with
you on subsequent phases of this project and others.
Sincerely,
W. K. Dick Co., Inc.
Charles R. Froneberger, P.E.
Project Manager
Enclosures
MAR 3 2008
DENR. WATER-QUALM
V&-TLANDS AND STORMWfAMR WA O
cc: Mr. Stephen A. Gilbert, PE, PLS
616 Colonnade Drive L:AProjects\LINCL\30522000L\Documents\I_Approvals\NCDWQ Wetland Coverl-TRAoc
Charlotte, NC 28205
Tel: [phone]
Fax: [phone]
www.wkdick>on.com Goomati(
Office Use Only: Form Version March 05
08 0
USACE Action ID No. DWQ No. 3 9 0
(If any particular item is not applicable to this project, please enter "Not Applicable" or "N/A".)
1. Processing
1. Check all of the approval(s) requested for this project:
® Section 404 Permit ? Riparian or Watershed Buffer Rules
? Section 10 Permit ? Isolated Wetland Permit from DWQ
® 401 Water Quality Certification ? Express 401 Water Quality Certification
2. Nationwide, Regional or General Permit Number(s) Requested: NWP 12, GC 3374
3. If this notification is solely a courtesy copy because written approval for the 401 Certification
is not required, check here:
4. If payment into the North Carolina Ecosystem Enhancement Program (NCEEP) is proposed
for mitigation of impacts, attach the acceptance letter from NCEEP, complete section VIII,
and check here: ?
5. If your project is located in any of North Carolina's twenty coastal counties (listed on page
4), and the project is within a North Carolina Division of Coastal Management Area of
Environmental Concern (see the top of page 2 for further details), check here: ?
II. Applicant Information a§@WWffl D
1. Owner/Applicant Information MAR 3 2008
Name: Lincoln County 9 . WATER QUAt1_
Mailing Address: 115 West Main Street WETLANDS AND sT? BRA
Lincolnton, NC 28092
Attention: Stephen A. Gilbert, P.E., P.L.S.
Telephone Number: 704-736-8495 Fax Number: 704-736-8499
E-mail Address: sgilbertna,lincolncounty.ora
2. Agent/Consultant Information (A signed and dated copy of the Agent Authorization letter
must be attached if the Agent has signatory authority for the owner/applicant.)
Name: Ward Marotti
Company Affiliation: WK Dickson
Mailing Address: 3101 John Humphries Wynd
Raleigh, NC 27612
Telephone Number: 919-782-0495 Fax Number: 919-782-9672
E-mail Address: wmarotti(twkdickson.com
Page 1 of 9
III. Project Information
Attach a vicinity map clearly showing the location of the property with respect to local
landmarks such as towns, rivers, and roads. Also provide a detailed site plan showing property
boundaries and development plans in relation to surrounding properties. Both the vicinity map
and site plan must include a scale and north arrow. The specific footprints of all buildings,
impervious surfaces, or other facilities must be included. If possible, the maps and plans should
include the appropriate USGS Topographic Quad Map and NRCS Soil Survey with the property
boundaries outlined. Plan drawings, or other maps may be included at the applicant's discretion,
so long as the property is clearly defined. For administrative and distribution purposes, the
USACE requires information to be submitted on sheets no larger than I1 by 17-inch format;
however, DWQ may accept paperwork of any size. DWQ prefers full-size construction
drawings rather than a sequential sheet version of the full-size plans. If full-size plans are
reduced to a small scale such that the final version is illegible, the applicant will be informed that
the project has been placed on hold until decipherable maps are provided.
1. Name of project: Killian Creek Wastewater Treatment Plant, Gravity Sewers, Force
Mains and Pump Stations
2. T.I.P. Project Number or State Project Number (NCDOT Only):
3. Property Identification Number (Tax PIN): 3691-00-38-1064
4. Location
County: Lincoln Nearest Town: Lowesville, NC
Subdivision name (include phase/lot number):
Directions to site (include road numbers/names, landmarks, etc.): From NC 73 West, west
of the Catawba River and Lake Norman Dam, turn south onto NC 16. Go approximately
2.25 miles to Plank Road. Turn west and continue on Plank Rd for approximately 1.5 miles.
The access road connection is on the rig (north) side of the road.
5. Site coordinates (For linear projects, such as a road or utility line, attach a sheet that
separately lists the coordinates for each crossing of a distinct waterbody.)
Decimal Degrees (6 digits minimum): 35.4420 ON 81.0326 °w (Stream Impact #1 Temp.)
35.4372 ON 81.0300 °w (Stream Impact #2 Temp.)
35.4335 ON 81.0291 °w (Stream Impact #3 Temp.)
35.4200 °N 81.0332 °w (Stream Impact #4 Perm.)
6. Property size (acres): 37.03 ac. (WWTP site)
7. Name of nearest receiving body of water: Killian Creek
8. River Basin: Catawba 03-08-33
(Note - this must be one of North Carolina's seventeen designated major river basins. The
River Basin map is available at http://h2o.enr.state.nc.us/admin/mas/.)
Page 2 of 9
9. Describe the existing conditions on the site and general land use in the vicinity of the project
at the time of this application: The project is located in eastern Lincoln Coun in the
Piedmont physiographic province of North Carolina. Stream Impacts #1 and # 2 are
dominated by mature mixed hardwood forest along both banks. Both will be temporary
impacts. Stream Impact #3 is dominated by mature mixed hardwood forest on the east bank.
The west bank is immediately downstream of the existing Duke Power raw water intake
structure and is dominated by disturbed early successional vegetation. It is also a temporary
impact. Stream Impact #4 is dominated by mature mixed hardwoods and is apermanent
impact. Topography throughout the project consists of gently rolling hills with elevations
ranging from 640 feet to 800 feet.
10. Describe the overall project in detail, including the type of equipment to be used: Lincoln
County will construct the new Killian Creek Wastewater Treatment Plant with an initial
capacity of 1.68 MGD and a final capacity (Phase II) of 3.35 MGD. Phase I will consist of a
combination of gravity sewers, force mains, and pump stations between the Forney Creek
WWTP and the proposed Killian Creek WWTP. The Phase II wastewater conveyance
system consists of 8, 18, and 24-inch rgavity sewer line to transfer wastewater from the
future developments north of the Middle Forney Creek WWTP. Typical earthmoving and
construction equipment will be used.
11. Explain the purpose of the proposed work: Due to the existing growth in the area in
conjunction with the projected growth, the existing s?anitary sewer and wastewater treatment
facilities do not have the capacity to convey and treat projected needs. Lincoln Coun is
expanding sanitary sewer services to meet growing demand of its customers in eastern
Lincoln County.
IV. Prior Project History
If jurisdictional determinations and/or permits have been requested and/or obtained for this
project (including all prior phases of the same subdivision) in the past, please explain. Include
the USACE Action ID Number, DWQ Project Number, application date, and date permits and
certifications were issued or withdrawn. Provide photocopies of previously issued permits,
certifications or other useful information. Describe previously approved wetland, stream and
buffer impacts, along with associated mitigation (where applicable). If this is a NCDOT project,
list and describe permits issued for prior segments of the same T.I.P. project, along with
construction schedules. The proposed plant construction and wastewater conveyance lines are
the first phase of the project, which received a Finding of No Significant Impact from NCDENR
on 18 January 2008 (attached).
V. Future Project Plans
Are any future permit requests anticipated for this project? If so, describe the anticipated work,
and provide justification for the exclusion of this work from the current application.
Page 3 of 9
Future phases of a wastewater collection system are likely, pursuant to the Environmental
Assessment. Because specific construction timing design, and alignment will proceed on an as
needed basis and will not be finalized until necessary, no precise impacts and associate
permitting are appropriate at this time.
VI. Proposed Impacts to Waters of the United States/Waters of the State
It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to
wetlands, open water, and stream channels associated with the project. Each impact must be
listed separately in the tables below (e.g., culvert installation should be listed separately from
riprap dissipater pads). Be sure to indicate if an impact is temporary. All proposed impacts,
permanent and temporary, must be listed, and must be labeled and clearly identifiable on an
accompanying site plan. All wetlands and waters, and all streams (intermittent and perennial)
should be shown on a delineation map, whether or not impacts are proposed to these systems.
Wetland and stream evaluation and delineation forms should be included as appropriate.
Photographs may be included at the applicant's discretion. If this proposed impact is strictly for
wetland or stream mitigation, list and describe the impact in Section VIII below. If additional
space is needed for listing or description, please attach a separate sheet.
1. Provide a written description of the proposed impacts. No wetland impacts will occur during
Phase 1 construction.
2. Individually list wetland impacts. Types of impacts include, but are not limited to
mechanized clearing, grading, fill, excavation, flooding, ditching/drainage, etc. For dams,
se aratel list impacts due to both structure and floodin .
Wetland Impact
Site Number
(indicate on map)
Type of Impact Type of Wetland
(e.g., forested, marsh,
herbaceous, bog, etc.) Located within
100-year
Floodplain
es/no Distance to
Nearest
Stream
linear feet Area of
Impact
(acres)

Total Wetland Impact (acres) 0.00
3. List the total acreage (estimated) of all existing wetlands on the property: 0.69 acre (no
impacts)
4. Individually list all intermittent and perennial stream impacts. Be sure to identify temporary
impacts. Stream impacts include, but are not limited to placement of fill or culverts, dam
construction, flooding, relocation, stabilization activities (e.g., cement walls, rip-rap, crib
walls, gabions, etc.), excavation, ditching/straightening, etc. If stream relocation is proposed,
plans and profiles showing the linear footprint for both the original and relocated streams
must be included. To calculate acreage, multiply length X width, then divide by 43,560.
Page 4 of 9
Stream Impact
Number
indicate on ma
Stream Name
Type of Impact
Perennial Intermittent?
? Average
Stream Width
Before Impact Impact
Length
linear feet Area of
Impact
acres
1 Ut Temporary Perennial 10 73 0.017
2 Ut Temporary Perennial 12 51 0.014
3 Killian Creek Temporary Perennial 51 55 0.064
4 Ut Permanent Perennial 10 140 0.032

Total Temporary Stream Impact (by length and acreage) 319 0.126
Total Permanent Stream Impact (by length and acreage) 140 0.032
5. Individually list all open water impacts (including lakes, ponds, estuaries, sounds, Atlantic
Ocean and any other water of the U.S.). Open water impacts include, but are not limited to
fill, excavation, dredging, floodin , drainage, bulkheads, etc.
Open Water Impact
Site Number
indicate on ma Name of Waterbody
(if applicable)
Type of Impact Type of Waterbody
(lake, pond, estuary, sound, bay,
ocean, etc. Area of
Impact
acres

Total Open Water Impact (acres) 0.00
6. List the cumulative impact to all Waters of the U.S. resulting from the project:
*Stream Impact (acres): 0.032
Wetland Impact (acres): 0.00
Open Water Impact (acres): 0.00
*Total Impact to Waters of the U.S. (acres) 0.032
*Total Stream Impact (linear feet): 140.0
*Permanent Stream Impacts
7. Isolated Waters
Do any isolated waters exist on the property? ? Yes ® No
Describe all impacts to isolated waters, and include the type of water (wetland or stream) and
the size of the proposed impact (acres or linear feet). Please note that this section only
applies to waters that have specifically been determined to be isolated by the USAGE.
8. Pond Creation
If construction of a pond is proposed, associated wetland and stream impacts should be
included above in the wetland and stream impact sections. Also, the proposed pond should
be described here and illustrated on any maps included with this application.
Page 5 of 9
Pond to be created in (check all that apply): ? uplands ? stream ? wetlands
Describe the method of construction (e.g., dam/embankment, excavation, installation of
draw-down valve or spillway, etc.): N/A
Proposed use or purpose of pond (e.g., livestock watering, irrigation, aesthetic, trout pond,
local stormwater requirement, etc.): N/A
Current land use in the vicinity of the pond: N/A
Size of watershed draining to pond: N/A Expected pond surface area: N/A
VII. Impact Justification (Avoidance and Minimization)
Specifically describe measures taken to avoid the proposed impacts. It may be useful to provide
information related to site constraints such as topography, building ordinances, accessibility, and
financial viability of the project. The applicant may attach drawings of alternative, lower-impact
site layouts, and explain why these design options were not feasible. Also discuss how impacts
were minimized once the desired site plan was developed. If applicable, discuss construction
techniques to be followed during construction to reduce impacts. All impacts to waters of the
U.S. have been avoided and minimized to the maximum extent practicable. All conditions of
NWP 12 and GC 3374 will be satisfied to further minimize impacts.
VIII. Mitigation
DWQ - In accordance with 15A NCAC 2H .0500, mitigation may be required by the NC
Division of Water Quality for projects involving greater than or equal to one acre of impacts to
freshwater wetlands or greater than or equal to 150 linear feet of total impacts to perennial
streams.
USACE - In accordance with the Final Notice of Issuance and Modification of Nationwide
Permits, published in the Federal Register on January 15, 2002, mitigation will be required when
necessary to ensure that adverse effects to the aquatic environment are minimal. Factors
including size and type of proposed impact and function and relative value of the impacted
aquatic resource will be considered in determining acceptability of appropriate and practicable
mitigation as proposed. Examples of mitigation that may be appropriate and practicable include,
but are not limited to: reducing the size of the project; establishing and maintaining wetland
and/or upland vegetated buffers to protect open waters such as streams; and replacing losses of
aquatic resource functions and values by creating, restoring, enhancing, or preserving similar
functions and values, preferable in the same watershed.
If mitigation is required for this project, a copy of the mitigation plan must be attached in order
for USACE or DWQ to consider the application complete for processing. Any application
lacking a required mitigation plan or NCEEP concurrence shall be placed on hold as incomplete.
An applicant may also choose to review the current guidelines for stream restoration in DWQ's
Draft Technical Guide for Stream Work in North Carolina, available at
http://h2o.enr.state.nc.us/ncwetlands/stnngide.html.
Provide a brief description of the proposed mitigation plan. The description should provide
as much information as possible, including, but not limited to: site location (attach directions
Page 6 of 9
and/or map, if offsite), affected stream and river basin, type and amount (acreage/linear feet)
of mitigation proposed (restoration, enhancement, creation, or preservation), a plan view,
preservation mechanism (e.g., deed restrictions, conservation easement, etc.), and a
description of the current site conditions and proposed method of construction. Please attach
a separate sheet if more space is needed.
The direct impacts of project construction and operation will be minimal and follow the
approved erosion and sedimentation control plans. Pursuant to NWP 12, no mitigation is
required for the 140' of permanent stream impacts.
2. Mitigation may also be made by payment into the North Carolina Ecosystem Enhancement
Program (NCEEP). Please note it is the applicant's responsibility to contact the NCEEP at
[phone] to determine availability, and written approval from the NCEEP indicating
that they are will to accept payment for the mitigation must be attached to this form. For
additional information regarding the application process for the NCEEP, check the NCEEP
website at htip://h2o.enr.state.nc.us/wrp/index.htm. If use of the NCEEP is proposed, please
check the appropriate box on page five and provide the following information:
Amount of stream mitigation requested (linear feet): N/A
Amount of buffer mitigation requested (square feet): N/A
Amount of Riparian wetland mitigation requested (acres): N/A
Amount of Non-riparian wetland mitigation requested (acres): N/A
Amount of Coastal wetland mitigation requested (acres): N/A
IX. Environmental Documentation (required by DWQ)
Does the project involve an expenditure of public (federal/state/local) funds or the use of
public (federal/state) land? Yes ® No ?
2. If yes, does the project require preparation of an environmental document pursuant to the
requirements of the National or North Carolina Environmental Policy Act (NEPA/SEPA)?
Note: If you are not sure whether a NEPA/SEPA document is required, call the SEPA
coordinator at [phone] to review current thresholds for environmental documentation.
Yes ® No ?
3. If yes, has the document review been finalized by the State Clearinghouse? If so, please
attach a copy of the NEPA or SEPA final approval letter. Yes ® No ?
X. Proposed Impacts on Riparian and Watershed Buffers (required by DWQ)
It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to
required state and local buffers associated with the project. The applicant must also provide
justification for these impacts in Section VII above. All proposed impacts must be listed herein,
and must be clearly identifiable on the accompanying site plan. All buffers must be shown on a
map, whether or not impacts are proposed to the buffers. Correspondence from the DWQ
Regional Office may be included as appropriate. Photographs may also be included at the
applicant's discretion.
Page 7 of 9
1. Will the project impact protected riparian buffers identified within 15A NCAC 2B .0233
(Meuse), 15A NCAC 2B .0259 (Tar-Pamlico), 15A NCAC 02B .0243 (Catawba) 15A NCAC
2B .0250 (Randleman Rules and Water Supply Buffer Requirements), or other (please
identify )? Yes ? No
2. If "yes", identify the square feet and acreage of impact to each zone of the riparian buffers.
If buffer mitigation is required calculate the required amount of mitigation by applying the
buffer multipliers.
Impact Required
Zone* Multiplier .!
3 (2 for Catawba)
1.5
Total
* Zone 1 extends out 30 feet perpendicular from the top of the near bank of channel; Zone 2 extends an
additional 20 feet from the edge of Zone 1.
3. If buffer mitigation is required, please discuss what type of mitigation is proposed (i.e.,
Donation of Property, Riparian Buffer Restoration / Enhancement, or Payment into the
Riparian Buffer Restoration Fund). Please attach all appropriate information as identified
within 15A NCAC 2B .0242 or .0244, or .0260.
XI. Stormwater (required by DWQ)
Describe impervious acreage (existing and proposed) versus total acreage on the site. Discuss
stormwater controls proposed in order to protect surface waters and wetlands downstream from
the property. If percent impervious surface exceeds 20%, please provide calculations
demonstrating total proposed impervious level. Stormwater design is not completed at this time.
Stormwater design will be completed as part of the WWTP design and construction phase.
XII. Sewage Disposal (required by DWQ)
Clearly detail the ultimate treatment methods and disposition (non-discharge or discharge) of
wastewater generated from the proposed project, or available capacity of the subject facility.
It is anticipated that on-site disposal (septic) will be utilized.
XIII. Violations (required by DWQ)
Is this site in violation of DWQ Wetland Rules (15A NCAC 2H .0500) or any Buffer Rules?
Yes ? No
Is this an after-the-fact permit application? Yes ? No
XIV. Cumulative Impacts (required by DWQ)
Page 8 of 9
Describe impervious acreage (existing and proposed) versus total acreage on the site. Discuss
stormwater controls proposed in order to protect surface waters and wetlands downstream from
the property. If percent impervious surface exceeds 20%, please provide calculations
demonstrating total proposed impervious level.
1. Sewage Disposal (required by DWQ)
Clearly detail the ultimate treatment methods and disposition (non-discharge or discharge) of
wastewater generated from the proposed project, or available capacity of the subject facility.
II. Violations (required by DWQ)
Is this site in violation of DWQ Wetland Rules (15A NCAC 2H .0500) or any Buffer Rules?
Yes ? No
Is this an after-the-fact permit application? Yes ? No ?
III. Cumulative Impacts (required by DWQ)
Will this project (based on past and reasonably anticipated future impacts) result in additional
development, which could impact nearby downstream water quality? Yes N No ?
If yes, please submit a qualitative or quantitative cumulative impact analysis in accordance with
the most recent North Carolina Division of Water Quality policy posted on our website at
http://h2o.enr.state.nc.us/ncwetlands. If no, please provide a short narrative description:
Potential cumulative impacts from the proposed wastewater treatment service area
expansion, including secondary and cumulative impacts are addressed in the
IV. Other Circumstances (Optional)' Environmental Asssessment and the Findings of No
Significant Impact (attached).
It is the applicant's responsibility to submit the application sufficiently in advance of desired
construction dates to allow processing time for these permits. However, an applicant may
choose to list constraints associated with construction or sequencing that may impose limits on
work schedules (e.g., draw-down schedules for lakes, dates associated with Endangered and
Threatened Species, accessibility problems, or other issues outside of the applicant's control).
Z-
Applicant(Agent's Signature Date
(Agent's signature is valid only if an authorization letter from the applicant is provided.)
Page 1 of I
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Figure 1.
Killian Creek WWTP, Gravity Sewers, Force Mains and Pump Stations
�WK Vicinity Location Map
DICKSON Lincoln County, NC
WATERSHED SCIENCES Lincoln County
0 1,000 2,000 4,000 NTS
Feet

Proposed Killian Creek WWTP
Stream Impact # 4
Permanent p
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9

:, '. a ) -,JR .af ,.
-31 q

Figure 2. Legend
Killian Creek WWTP, Gravity Sewers, Proposed WWTP Access Road
Force Mains and Pump Stations Proposed WWTP and Pump Station
Proposed Impacts Location Map Proposed Sewer Lines
WATERSHED SCIENC ES Lincoln County, NC Streams N
Wetlands
0 650 1,300 2,600 Roads
Feet Pacels

rigure 3. I emporary atream impact i+ I
`i
----KILLIAN CREEK
--- -&&-
-,
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PERMANMENT EASEMENT - '?
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PROP MANHOLE ?`PRZ3P: MANHOLE
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T FENCE
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PROFILE
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CREEK CROSSING REQUIREMENTS:
50' 1. CONTRACTOR SHALL INSTALL TEMPORARY PUMPS AND PIPING
AT DUKE ENERGY DAM STRUCTURE AND PUMP FLOW AROUND
= 5' DISTURBED CONSTRUCTION AREA. ALL PUMPING ACTIVITIES
SHALL BE COORDINATED WITH AND SHALL IMPACT DUKE
ENERGY WATER INTAKE.
2. CONTRACTOR SHALL RESTORE AND RETURN CHANNEL TO ITS
ORIGINAL GRADE AND ELEVATIONS.
3. DEPENDING ON THE SEASON, CONTRACTOR SHALL STABILIZE THE
CREEK BANKS WITH EITHER LIVE STAKES OF NATIVE VEGETATION OR
BARE ROOT MATERIAL.
KILLIAN CREEK WWTP
LINCOLN COUNTY, NORTH CAROLINA
STA. 48+06.19 -
PROP. MANHOLE
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SCALE IN FEET
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PROP. MANHOLE PROP. MANHOLE

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INV. OUT 642.40
SCALE: HPOR . 1" = 50'
VERT. 1" = 5'
01OKSON
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INV. IN 642.69
INV. OUT 642.59
CREEK CROSSING REQUIREMENTS:
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AT DUKE ENERGY DAM STRUCTURE AND PUMP FLOW AROUND
DISTURBED CONSTRUCTION AREA. ALL PUMPING ACTIVITIES
SHALL BE COORDINATED WITH AND SHALL IMPACT DUKE
ENERGY WATER INTAKE.
2. CONTRACTOR SHALL RESTORE AND RETURN CHANNEL TO ITS
ORIGINAL GRADE AND ELEVATIONS.
3. DEPENDING ON THE SEASON, CONTRACTOR SHALL STABILIZE THE
CREEK BANKS WITH EITHER LIVE STAKES OF NATIVE VEGETATION OR
BARE ROOT MATERIAL.
KILLIAN CREEK WWTP
LINCOLN COUNTY, NORTH CAROLINA
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EXIS` N GRADE Y
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PERMANMENT EASEMENTS L-------------------
- L -
-- -- -- -- -- -- -- --'` --
J N 33°58'07 E
0 0 0
-----------------
CONSTRUCTION ?-I
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FINISH PAVEMENT

6+00 7+0
WK PROFILE
DICKSON SCALE: HORZ. 1" = 50'
A h* ",?' VERT. 1" = 5'
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KILLIAN CREEK WWTP
LINCOLN COUNTY, NORTH CAROLINA

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January 18, 2008
Mr. Stan Kiser, County Manager
Lincoln County
115 W. Main Street
Lincointon, North Carolina 28092
Coleen H. Sullins, Director
Division of Water Quality
SUBJECT: Lincoln County
Engineering Report
Project Number: CS370825-01
Dear Mr. Kiser:
This is to inform you that the Finding of No Significant Impact (FNSI) and the
Environmental Assessment (EA) have been submitted to the State Clearinghouse. The
documents will be advertised for thirty (30) calendar days in the N.C. Environmental Bulletin.
Advertising the FNSI is required prior to a local unit of government receiving financial support
from the State Revolving Loan program. You will be informed of any significant comment or
public objection when the advertisement period is completed.
A copy of the documents is transmitted for your record. The documents should be made
available to the public.
If there are any questions, please contact me at [phone].
Sincerely,
Daniel M. Blaisdell, P.E., Acting Chief
Construction Grants and Loans Section
JMH/dr
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Zi-Qiang Chen, Ph.D.
Seth Robertson, P.E.
Jennifer Haynie
DWQ Mooresville Regional Office
PMB/DMU/FEU/SRF
Construction Grants and Loans Section
1633 Mail Service Center Raleigh NC 27699-1633
Phone: [phone]/ FAX: [phone] / Internet: www.nccgi.net
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Michael r. Bastey, Governor
William G. Ross Jr., secretary
Norlh Carolina Department of Environment and Natural Resources
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FINDING OF NO SIGNIFICANT IMPACT
AND ENVIRONMENTAL ASSESSMENT
LINCOLN COUNTY
LONG RANGE WASTEWATER IMPROVEMENTS
RESPONSIBLE AGENCY: NORTH CAROLINA DEPARTMENT OF ENVIRONMENT
AND NATURAL RESOURCES
CONTACT: DANIEL M. BLAIS.DELL, P.E., ACTING CHIEF
CONSTRUCTION GRANTS AND LOANS SECTION
DIVISION OF WATER QUALITY
1633 MAIL SERVICE CENTER
RALEIGH, NORTH CAROLINA 27299-1633
(919)715-621.1.
January 18, 2008
FINDING OF NO SIGNIFICANT IMPACT (FNSI)
Article I, Chapter I I3A of the North Carolina General Statutes requires an action to be subject to
the requirements of the North Carolina Environmental Policy Act (NCEPA).if it involves the
expenditure of public funds and if a potential impact is anticipated to the environment. The
project has been. evaluated for compliance with the NCEPA and is determined to be a major
agency action, whicii will affect the environment.
Project Applicant: Lincoln County
Project Description: Lincoln County will construct the new Killian Creek Wastewater
Treatment Plant (WWTP) with an initial capacity (Phase I) of 1.68
MGD and a final capacity (Phase 11) of 3.35 MGD. The Phase I
conveyance system will consist of a combination of gravity sewers,
force mains, and pump stations between the Forney Creek WWTP
and the proposed Killian Creek WWTP. The Phase 11 wastewater
conveyance system consists of 8-inch, 18-inch, and 24-inch gravity
sewer to transport wastewater from future developments north of the
Middle Forney Creek WWTP.
Project Number: CS370825-01
State Revolving Loan
Fund: $17,500,000
Local Funding: $78,900
The review process indicated that significant adverse environmental impacts should not occur if
mitigative measures are implemented, and an environmental impact statement will not be
required. The decision was based on information in the Engineering Report and reviews by
governmental agencies. An environmental assessment supporting this action is attached. This
17NS1 completes the environmental review record, which is available for inspection at the State
Clearinghouse.
No administrative action will be taken on the proposed project for at least 30 days after
notification that the FNSI has been published in the North Carolina Environmental Bulletin.
Sincerely,
Coleen H. Sullins, Director
Division of Water Quality
ENVIRONMEWTAL ASSESSMENT
A. Proposed Facilities and Actions
Figure 1 identifies the location of the proposed wastewater collection-transport facilities.
New TransVort and Treatment Facilities:, Lincoln County (formerly East Lincoln County Water
& Sewer District) proposes to, .pnstruct the Phase I Lower Forney/Killian Creek wastewater
conveyance system and wastewater treatment plant with an initial capacity of 1.68 MOD.
The Killian Creek conveyance system will consist of the construction of approximately 2,750
linear feet (l.f.) of 36-inch diameter gravity interceptor and 2,350 I.f. of 30-inch diameter gravity
interceptor with associated .manholes, 5,1001.f, of 20-inch force main, and a 2,900 gpm WWTP
influent pump station. The WWTP influent pump station will include duplex pumps, a sewage
grinder, SCADA system, and an emergency generator with automatic transfer switch.
The Forney Creek conveyance system will consist of approximately 4501.f. of 30-inch diameter
gravity sewer, 301.f. of 18-inch diameter gravity sewer with associated manholes and 3,100 l.f.
of 12-inch diameter force main connecting into an existing force main, and a new 1,750 gpm
wastewater relief pump station with duplex pumps to be located at the Middle Forney Creek
WWTP:
The proposed new Killian Creek WWTP (Phase 1, 1.68 MOD) consists of construction of a
mechanically cleaned cylindrical bar screen with manually cleaned bypass screen, vortex grit
separator, influent Parshall flume, a dual-basin SBR system with retractable air diffuser
assemblies, floating mixers, SBR floating decanters, WAS pumps, post equalization basin, two
rotating disk filters, a UV disinfection unit, two aerobic digesters, one sludge holding basin, one
rotary press sludge dewatering system with liquid polymer feed system and sludge conveyor
system, a plant drainage pump station, an office/lab building, a maintenance building, a plant
control and SCADA system, an emergency generator, piping, electrical and site work.
The proposed Phase II conveyance system construction will consist of approximately 20,5001.f.
of 24-inch diameter gravity interceptor, 9,000 l.f. of 18-inch diameter gravity interceptor, and
4,7001.f. of 8-inch gravity interceptor, all within the Forney Creek drainage basin. The proposed
Killian Creek WWTP (Phase II) expansion will consist of installation of process equipment to
allow the WWTP to expand to 3.35 MOD. Both the Phase II conveyance system and Phase 11
Killian Creek WWTP expansion are to be constructed at a later date, when funding is available.
Funding Status: Lincoln County proposes to apply for a State Revolving Loan in the amount of
$17,500,000 to cover the proposed Phase .1 wastewater treatment system projects and Phase I
conveyance system. Probable project costs are $13,269,300 for the proposed Killian Creek
WWTP (Phase 1) and $4,309,600 for the Lower Forney/Killian Creek conveyance systems for a
total project cost of $17,578,900. Lincoln County will use the "Lincoln County Sewer Fund" to
cover the remaining $78,900 project cost.
B. Existing Environment
Topography and Soils. i.incoln County is located in the Piedmont physiographic province of
North Carolina. The Eastern Slate Belt, Charlotte/Milton Belt, and die Kings Mountain Belt
encompass the project area. Elevations within Lincoln County range from 640 feet at the Gaston
County Line to 1,000 feet along the Catawba County Line. Within the project area, elevations
range from approximately 640 feet to 800 feet. Tile predominant soils on the proposed Killian
Creek WWTP site are of the C-zeil and Pacolet series. Soils in the Phase 17 service area are of the
Cecil, Chewacla, Pacolet, Gaston, Georgeville, and Zion-Winnsboro series. Cecil series soils
consist of very deep, well-drained, moderately-permeable soils that are found on ridges and side
slopes of the Piedmont Uplands. Slopes for Cecil soils range from zero to 25 percent. Chewacla
soils are soils that are found on the floodplains of the Piedmont and Coastal Plain river valleys.
They are somewhat poorly drained with moderate permeability and slopes ranging from zero to
two percent.. Gaston soils are-soils found on ridges and slopes of the Piedmont Uplands. These
soils are very deep, well drained, and moderately permeable with slopes from two to 25 percent.
Georgeville soils consist of soils that are well drained and moderately permeable with slopes
from two to 50 percent. Pacolet soils are soils that are well drained and moderately permeable
that are found in the Piedmont Uplands. Their slopes range from 15 to 25 percent. Zion-
Winnsboro soils are soils found in the Piedmont Uplands that are well drained with moderate to
slow permeability. Slopes of these soils range from two to 45 percent.
Surface Water. The project is located within the Catwaba River Basin. Lake Norman borders
'the eastern portion of the service area. Little Creek, Burton Creek, Graham Creek, Lucky Creek,
and several unnamed tributaries, all in Sub-basin 03-08-32, drain the portion of the county
closest to Lake Norman. Johnson Creek (Sub-basin 03-08-33) drains the area southwest of the
intersection of NC 73 and NC 16. Killian Creek and its tributaries, which are Forney Creek,
Anderson Creek, Snyder Creek, and Ballard Creek in Sub-basin 03-08-33 drain the service area
west of NC 16. Leepers Creek and Hoyles Creek drain the remainder of eastern Lincoln County
and are found in Sub-basin 03-08-35. Lake Norman, Burton. Creek, Graham Creek, Hoyles
Creek, Johnson Creek, Lucky Creek, Killian Creek, Leepers Creek, and Little Creek are
classified as WS-IV-streams. In addition, Lake Norman, Graham Creek and Lucky Creek are
also classified as B. Graham Creek, Lucky Creek, and Johnson Creek have supplemental
designation as Critical Areas (CA). Anderson Creek, Ballard Creek, Forney Creek, Killian
Creek, Leepers Creek, and Snyder Creek have a water quality designation as C. Water bodies
with a WS-1V designation are drinking water supply bodies for water that is used for drinking,
culinary, and food processing.. Waters that have a B classification are waters that are protected
for all uses under Class C and are used for primary recreation, including swimming, skin diving,
water skiing, and other similar uses that involve human body contact with the water in an
organized manner or on a frequent basis. Class C waters allow for secondary recreation, fishing,
wildlife fish consumption, and aquatic life. Secondary recreation is defined as wading, boating,
and other uses involving human body contact with water, where activities take place in an
infrequent, unorganized, or incidental manner. Streams with a CA classification are contained
within land that is within one-half mile upstream and draining to a river intake, or the area within
one-half mile and draining to the normal pool elevation of water supply reservoirs. These are
areas where the risks associated with pollution are greater than the remaining portions of the
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watershed. Killian Creek is listed as impaired for aquatic life from the confluence with
Anderson Creek to a point 1.2 miles from its mouth, due to land 'development.
Water Sum. A portion of eastern Lincoln County receives its drinking water from Lincoln
County, whose water source is the Lincoln County Lake Norman Water Treatment Plant (WTP).
Additionally, many residents utilize private wells.
C Existing Wastewater Facilities
The service area for the East Lincoln County Water and Sewer District, which was subsumed by
Lincoln County in 2007, consists of approximately 17 square miles in the Catawba Springs
Township, which is the easternmost township of Lincoln County. It serves the developing
corridor along NC 16, developments adjacent to Lake Norman, and residential areas west of
North Egypt Road. The area between the western shore of Lake Norman and NC 16 is served by
a low-pressure sewer system. The area west of NC 16 is predominantly served by gravity sewer,
pump stations, and force mains.
The collection and conveyance system consists of 250,111 l.f. of low-pressure sewer, 23
pumping stations (excluding individual residential pump stations), 87,771 l.f. of force mains, and
181,6861.f. of gravity sewer (322.9 inch-miles). In'2004, this system served 2,491 sewer
customers with a total daily wastewater flow of approximately 470,000 gallons per day (gpd).
Other areas within eastern Lincoln County (Catawba Springs and Ironton Townships) are not
sewered and are served by individual septic systems. Though these areas do not have current
reported public health issues, they remain a potentially high risk for groundwater contamination
due to d high density of aging septic systems that may fail. Currently, Ironton Station
Elementary School and East Lincoln Middle School have recently experiences{ problems with
their drain field systems, as have the Lake Haven and Rock Springs subdivisions.
The Middle Forney Creek WWTP provides wastewater treatment to portions of eastern Lincoln
County. This treatment plant was placed into service in 1996 with a design capacity of 0.75
MGD. In 2004, it had an average daily flow of 0.47 MGD. The WWTP consisted of an influent
pump station, influent Parshall flume, bar screen aerated grit chamber, an oxidation ditch, two
secondary clarifiers, chlorination, two chlorine contact basins, dechlorination, effluent reaeration,
two return-activated sludge pumps, waste-activated weir, dissolved air flotation thickener,
aerobic sludge digester, gravity thickener, one sludge transfer pump, a holding tank, and land
application sludge disposal. In January 2007, modifications to the Middle Forney Creek WWTP
increased its capacity to 0975 MGD. These modifications consisted of a replacement of influent
pumps to provide additional peak flow capacity, modifications to the oxidation ditch aeration
system. to provide additional oxygen transfer capacity, and addition of a new chlorine contact
chamber, replacement of the existing chlorine and sulfur dioxide feed system, improvements to
the sodium hydroxide chemical storage and feed system, replacement of aeration diffusers in the
aerobic digester, an addition of a scum skimmer in the sludge gravity thickener, new scum
pumps and wet well mixer, a new thickened sludge transfer pumps and controls, and
improvements at the sludge holding tank.
The NPDES permit limits for the Middle Forney Creek WW'I'P (NC0074012) are:
Parameter
Flow
BOD5 (monthly average Summer-Winter)
NH1-N (monthly average Summer-Winter)
TSS (monthly average)
Fecal Coliform (monthly average)
Total Residual Chlorine (daily maximum)
Limit
0.975 MOD
13.0 mg/L and 26.0 mg/L
1.3 mg/L, and 3.2 mg/L
30.0 mg/L
200.0 Count 100 mL
23.0 Rg/L
D. Need for Proposed Facilities and Actions
Approximately 80 percent of Lincoln County's residents live in the eastern portion of the county
due to access to Lake Norman, and close proximity to several metropolitan areas such as
Charlotte and Hickory. Also, the completion of US 321 and the ongoing widening of NC 16
have stimulated growth in this area.
In 2004, the original 0.75 MOD Middle Forney Creek WWTP treated an annual average
wastewater flow of 0.47 MOD. In 2006, commitments at the upgraded Middle Forney Creek
WWTP exceeded 90 percent of its upgraded 0.975 MOD capacity and prompted the County to
begin refusing requests for additional capacity. Current trends indicate that the continued growth
will exceed this expanded capacity by 2009.
In eastern Lincoln County, approximately 20 percent of the residents are served by sanitary
sewer,'and the remaining 80 percent utilize on-site septic systems. Since the estimated
population of eastern Lincoln County is expected to increase by 20,869 people for a total of
53,088 people by 2025, approximately 7,935 new septic systems, exclusive of anticipated
commercial and industrial growth, would have to be installed to accommodate new development,
especially since a moratorium has been placed on new sanitary sewer connections. Though
Lincoln County currently has very low reports of septic system malfunctions countywide, (222
malfunctions over the past two years), the potential exists that additional malfunctions may not
be reported or will occur over the next several years as other septic systems begin failing, due to
age or other problems. Currently, Iron Station Elementary School, East Lincoln County Middle
School, and Lake Haven and Rock Springs subdivisions are experiencing septic system
malfunctions. Existing and potential malfunctions, due to aging systems and the rising number
of new systems installed, increase the risk of contaminating groundwater and surface water
during high-precipitation events.
E. Alternatives Analysis
An alternatives analysis was performed on the expansion of the wastewater conveyance system
and treatment capacity in eastern Lincoln County. For expansion of the conveyance system, the
alternatives considered were: (1) No-Action Alternative, (2) Gravity Interceptors to the Proposed
Killian Creek WWTP, (3) Pump Station at Hedrick Property on Lower Forney Creels, (4) Pump
Station at Middle Forney Creek, (5) Pump Station with New Force Main, and (6) Lower
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Forney-Killian Creek Pump Station. Wastewater treatment system alternatives included: (1) No-
Action Alternative, (2) Optimum Operation or Upgrade of Existing Facilities, (3) On--Site
:Treatment Systems, (4) Land Application, (5) -Water Reuse, (6) Regionalization with the City of
Lrncolnton, (7) Regionalization at the Confluence of Killian and Forney Creeks, and (8)
Regionalization at the Lincoln/Gaston County Line.
Conveyance System
No-Action Alternative: This alternative would consist-of all existing conveyance systems
remaining in place with the addition of no new wastewater conveyance infrastructure. Most of
eastern Lincoln County would continue to rely on septic systems for wastewater treatment,
including areas with known septic system problems (Iron Station Elementary School, East
Lincoln Middle School, and the Lake Haven and Rock Springs subdivisions). This alternative
was rejected because it would not provide increased conveyance capacity for development and
would increase the potential for both surface water pollution during heavy precipitation events
and groundwater pollution.
Gravity Interceotors to the Pmposed Killian Creek WWTP Alternative: Under Phase I of this
alternative,-2,350 I.f. and 2,7501.f. of 30- and 36-inch gravity sewer would be installed between
the existing pump station along Killian Creek and the proposed Killian Creek WWTP. A 30-inch
gravity interceptor from the Middle Forney Creek WWTP to the proposed Killian Creek WWTP
would be constricted. Phase II would consist of constructing a gravity sewer along the eastern
bank of Forney Creek from the Middle Forney Creek WWTP to just south of the intersection of
NC 16 with Saint James Church Road. Phase 11 would be constructed to minimize the impact to
environmentally sensitive areas, floodplains, and private property. This alternative would have
cost $5.:38 million for Phase I, but this alternative was rejected due to costa
PumR Station at. Middle Forney Creek Alternative: In Phase I for this alternative, 2,350 l.f. of
30-inch and 2,750 l.f. of 36-inch gravity sewer would be constructed between the existing pump
station along Killian Creek and the proposed Killian Creek WWTP. A 30-inch gravity
interceptor would extend from the Middle Forney Creek WWTP to a point north of a rock quarry
owned by Hedrick Industries, A pump station near the Hedrick Industries site, along with a force
main would transfer wastewater to the Killian Creek interceptor. A force main would transfer
wastewater directly to the proposed Killian Creek WWTP. Phase It would consist of
constructing a gravity sewer along the eastern bank of Forney Creek from the Middle Forney
Creek WWTP to just south of the intersection of NC 16 with Saint James Church Road. Phase 11
would be constructed to minimize the impacts to environmentally sensitive areas, floodplains,
and private property. Phase I for this alternative would cost $5.1.7 million. This alternative was
rejected due to cost.
Pump Station at Hedrick Property on Lower Forney Creek Alternative: Phase I for this
alternative would consist of installing 2,3501.f. of 30-inch gravity sewer and 2,750.1.f. of 36-inch
gravity sewer along Killian Creek and two new 1,750 gpm relief pumps at the Middle Forney
Creek WWTP. A new 12-inch diameter force main would be constructed along Little Egypt
Road connected to the existing 12-inch Killian Creek force main, whose flow would be reversed.
The Killian Creek WWTP influent pump station would be located near the confluence of Forney
and Killian Creeks with the force main transfer directly to the WWTP. Phase 11 would consist of
constructing a gravity sewer along the eastern bank of Forney Creek from the Middle Creek
WWTP to just south of the intersection of NC 16 with Saint James Road. Phase 11 would be
constructed to inini.irdze the impacts to environmentally sensitive areas, floodplains, and private
property. Costs for Phase I of this alternative would be $4.46 million. This alternative was
rejected due to cost.
Pump Station at Middle Forney Creek Alternative: Phase I of this alternative would consist of
gravity interceptors similar to the above alternative with the construction of a new relief pu np
station located at the Middle Forney Creek WWTP. Under this alternative, a new force main
would extend along Forney Creek and around the Hedrick Industries site to the WWTP influent
pump station, which would be located near the confluence of Forney and Killian Creeks with a
force main transfer directly to the proposed Killian Creek WWTP. Phase It would be
constructed to minimize the impacts to environmentally sensitive areas, floodplains, and private
property. Phase I costs for this alternative would be $5.22 million. This alternative was rejected
because of cost.
Killian Creek Pump Station Alternative: Phase I of this alternative would consist of the
construction of a relief pump station at the Middle Forney Creek WWTP and a 12-inch force
main along South Little Egypt Road to the existing 12-inch force main along Charlie Saine Trail.
The existing pump station along Killian Creek would be removed, and the flow in the existing
force main would be reversed. The wastewater would be sent to the proposed Killian Creek
WWTP via 2,350 l.f. of 30-inch gravity sewer, 2,750 I.f. of 36-inch gravity sewer, and 5,1001.f.
of force main. Phase II would be constructed to minimize the impacts to environmentally
sensitive areas, floodplains, and private property. The project cost for Phase I would be
approximately $4.31 million. This alternative is the preferred alternative due to Phase I project
costs and the fact that the least-impacting alternative for the Phase 11 conveyance system will be
utilized.
Wastewater Treatment
No-Action Alternative: This alternative would consist of making no improvements to the
Middle Forney Creek WWTP. If this alternative were implemented, the economic expansion of
eastern Lincoln County would be hindered due to lack of wastewater treatment capacity required
to accommodate such growth. Additionally, increased population within the area would require
more on-site wastewater treatment systems, including those for commercial developments,
schools, and public facilities. The installation of more on-site septic systems would raise the risk
of groundwater and surface water contamination from failing septic systems. This alternative
was rejected because it would not fulfill the purpose and need of the project.
Optimum Operation or Upgrade of Existing T?-acilities Alternative: Under this alternative, the
upgraded Middle Forney Creek WWTP would operate at its most efficient level. Even with the
upgrades that were completed in January 2007 that increased the capacity from 0.75 MGD to
0.975 MGD, the capacity of the Middle Forney. Creek WWTP will be depleted in 2009.
Additional expansion of the Middle Forney Creek WWTP is not possible because of inadequate
area for significant expansion, insufficient assimilative capacity at its current discharge location,
6
and poor location to extend gravity service to the areas where most of the development is
expected to occur. Therefore, this alternative was rejected because it does not meet the purpose
and need of. the project.
On-Site Treatment Systems Alternative: Under this alternative, on-site wastewater treatment
systems such as septic systems and tile field adsorption systems would be used throughout
eastern Lincoln County. By'2025, approximately7,900 on-site wastewater treatment systems
would be installed within eastern Lincoln County. As population densities or septic systems
failures increased, conveyance systems would be installed to these communities when
economically viable. However, the number of unreported septic system failures may increase, as
would the number of aging septic systems. Since this would increase the risk of surface water
pollution during high precipitation events, as well as groundwater pollution, this alternative was
rejected.
Land Application Alternative: This alternative would consist of constructing a secondary
wastewater treatment system, treated effluent storage, and a spray irrigation land disposal
system. To accommodate land application of the proposed flows, the total site area required
would be approximately 804 acres. The project costs for this option would be $26.1 million.
This alternative was rejected both because of the infeasibility of purchasing the needed land and
project cost.
Water Reuse Alternative: Under this alternative, effluent would be reused either at local golf
courses or in conjunctive reuse with Duke Energy. Due to the arnount of land needed (500-plus
acres) and the distance between the three golf courses in the areas (at approximately six miles
and greater) and the Middle Forney Creek WWTP, reusing all of the effluent from the Middle
Forney-Creek WWTP would be infeasible. Additionally, while Duke Energy has indicated that
they would considef the conjunctive reuse of treated effluent in the future after they have
evaluated the quality of the effluent, they are not presently interested in conjunctive reuse.
Because of the costs that would be associated with installing a reuse system for golf courses and
Duke Energy's lack of interest in presently utilizing treated effluent, this alternative was rejected.
Regionalization with the City of Lincolnton Alternative: Under this alternative, wastewater from
eastern Lincoln County would be sent to the City of Lineolnton's WWTP located south of the
city.on the South Fork Catawba River. The City of Lincolnton WWTP has a capacity of 6.0
MGD with a current flow of 3.5 MGD. The City indicated that to accept flows from eastern
Lincoln County, the City of Lincolnton WWTP would have to be expanded. Furthermore,
connection to the Lincolnton WWTP would require more than 16 miles of force main and a
number of intermediate pump stations to overcome the 300 foot change in elevation. Due to the
required expansion of the City of Lincolnton WWTP and the amount of force main and pump
stations that would be required to implement this alternative, it was rejected because it is
economically infeasible.
Regionalization at the Confluence of Killian and Forney Creeks Alternative: This alternative
would consist of locating the proposed Killian Creek WWTP at the confluence of Killian and
Forney Creeks. Under Phase 1, the WWTP would have a capacity of 1.68 MGD, which would
be expanded to 3.35 MGD under Phase 11. This site has lower stream flow than the other site
.7
considered. Speculative limits were determined for a 7.0 MGD flow, and the lower stream flow
would provide a less favorable limitation with regard to ammonia, nitrogen, total residual
chlorine (TRC), and chronic toxicity. Furthermore, no land is available for purchase at this
location. Due to the lower NPDES limitations that would be required, as well as the lack of
available land for purchase, this alternative was rejected..
Regionalization at the Lincoln/Gaston County Line Alternative: Under this alternative, the
proposed Killian Creek WWT° would be located near the Lincoln/Gaston County Line just west.
of Killian Creek. Under Phase I, the WWTP would have a capacity of 1.68 MGD, which would
be expanded to 3.35 MGD under Phase II. This site has a higher stream flow than the other site
considered, which would allow for a more favorable limitation for ammonia, nitrogen, TRC, and
chronic toxicity. Additionally, a 38-acre parcel is available for purchase at this location. Project
costs for Phase I would be approximately $13.3 million. Because of more favorable effluent
limitations and availability of land for the WWTP, this alternative is the preferred alternative.
The project will consist of constructing two phases of the project for both the collection system
and the proposed Killian Creek WWTP. The Phase I conveyance system would consist of
constructing a relief pump station at the existing Middle Forney Creek WWTP, constructing a
12-inch force main that will connect with the existing 12-inch force main; reversing the flow
through this force main and removing a pump station from service; constructing a 30- and
36-inch gravity sewer; adding two influent pump stations, and constructing a 20-inch force main
to send wastewater to the WWTP. Project costs for this alternative will be approximately $4.31
inillion. The Phase II conveyance system would be constructed from the existing Middle Forney
Creek WWTP northward to just south of the intersection of NC 16 and Saint James Church
Road. Phase I for wastewater treatment will consist of constructing the proposed Killian Creek
WWTP near the Lincoln/Gaston County Line with a capacity of 1.68 MGD. Project costs for
this phase will be approximately $13.26 million. Phase II for wastewater treatment will be an
expansion of the Killian Creek WWTP to 3.35 MGD. Project costs for the Phase IT conveyance
system and WWTP expansion will be determined at a future date when these phases will be
designed.
F. Environmental Consequences and Mitigative Measures
Topography and Soils: Construction of the WWTP will impact 20 acres of the 38-acre site. The
WWTP will not be constructed in the floodplain. Consructing the Phase I conveyance system
will disturb approximately 44 acres. The force main construction will be along roadway, and the
gravity sewer along Killian Creek will be in the floodplain (approximately 4,167 IS).
Construction of Phase II of the project north of the Middle Forney Creek WWTP will occur
along Forney Creek and will also be located in the floodplain (approximately 23,0321.f.).
Installation of the conveyance system for both phases will be by open trench construction. Pre-
construction contours will be restored after the pipeline is buried. Additionally, new above-
grade structures in the-floodplain will be limited to manholes designed for greater than 100-year
flood protection. These manholes will have a negligible impact on floodway hydrology. Also,
the new pump station located at the Middle Forney Creek WWTP will be in the 1.00-year
floodplain within the existing WWTP plant area. The elevation of the pump station and
manholes at the Middle Forney Creek WWTP will be designed at two feet above the 100-year
8
flood elevation. Construction will be in accordance with a North Carolina Department of
Environment and Natural Resources (DENR)-approved Erosion and Sedimentation Control Plan
and other provisions of the Sedimentation Pollution Control Act of 1973 (SPCA). Construction
will also incorporate appropriate best management practices (BMPs). No buildings and
permanent structures will be allowed in sewer line rights-of.--way.
Land Use: The construction of both phases of the project will encourage the development of
residential, commercial, and industrial land uses. However, no changes to the local zoning or
land uses will be needed to implement the proposed project. Lincoln County has adopted a
number of ordinances directing future land use for eastern Lincoln County in a manner that will
manage growth and conserve both natural and cultural resources. These include (1) a Zoning
Ordinance, (2) a subdivision ordinance, (3) Mobile Home Park Regulations, (4) Flood Damage
Ordinance, and (5) Water Supply Watershed Ordinance. Additionally, the County has adopted a
Soil Erosion Control and Sedimentation Ordinance and a streamside Buffer Ordinance that will
preserve the natural resources within the project area. Also, development in the project's service
areavill adhere to other applicable existing ordinances, as well as future ordinances.
Wetlands: Phases I and II construction of the proposed Killian Creek WWTP will not impact
any wetlands or cross any streams. Due to ongoing negotiations with Duke Power, the exact
potential impact to wetlands for construction of the Phase I conveyance system is not definitively
known. However, it is. estimated that 0.072 acre of wetlands will be temporarily impacted and
0.018 acre of wetlands will be permanently impacted. Construction of the Phase II conveyance
system may temporarily impact approximately 0.02 acre of wetlands and will not permanently
impact any wetlands. While the conceptual location of the Phase Il conveyance system has been
determined, the exact location of the Phase II conveyance system is unknown at this time. The
alignment will be designed to minimize environmental impacts to wetlands. In a letter dated
April 13, 2006, the United States Army Corps of Engineers (USACE) stated that they anticipated
that, a Nationwide Permit 12 would be required for this project (Project No. 200630862). The
USACE will determine the type of permit required during the final design of both phases of the
project. Additionally, the North Carolina Wildlife Commission (NCWRC) recommends that
Lincoln County implement the following recommendations:
• All municipalities benefitting from increased sewer services, development, and annexation
should incorporate into their local ordinances the same or better environmental protective
measures as specified by Lincoln County in this EA [and supporting documentation] prior to
the provision by the County of any wastewater connections or services.
• Instead of two-tiered buffers, the provision and protection of undisturbed, contiguous
forested buffers and entire floodplains should be promoted for improved long-term
stewardship. Regardless of tiers, we prefer and recommend contiguous forested buffers.
Buffer averaging may be used provided that maximum available undisturbed forested buffers
are provided and protected.
• Proper delineation of jurisdictional waters and wetlands should be provided prior to any
development approvals by local governments to ensure project compliance with the Clean
Water Act.
9
Important Farmlands: The Middle. Forney Creek WWTP where one pump station will be
installed is previously disturbed. Therefore, no impacts to important farmlands from the
construction of this pump station will occur. The proposed Killian Creek WWTP site contains
26.3 acres of prime farmland soils (15.8 acres of Cecil sandy loam, 0.95 acre of Chewacla
[where protected from flooding], 2.3 acres of Gaston sandy clay loam, 5.7 acres of Pacolet sandy
clay loam, and 1.6 acres of Riverview loam). The proposed project's footprint on this site will
impact approximately 20 percent (5.2 acres) of the important farmlands on the site. However,
this site is not being utilized fct farming. Additionally, the installation of the Killian Creek
pump station, which contains Cecil sandy loaun-, will impact 0.2 acre of important farmland that
is not being used for farming. Therefore, no impacts to important farmlands will occur.
Important farmland impacts for the Phase 11 conveyance system will be determined during the
design process.
Public Lands and Scenic Recreational and State Natural Areas: No public lands or scenic,
recreational, or state natural areas will be impacted by the construction of either phase of the
project.
Cultural Resources: In a letter dated May 1, 2007, the North Carolina State Historic Preservation
Office (SHPO) stated that no historic resources would be impacted by either phase of the
proposed project (Project No. ER 06-0770).
Air Quality: Construction of both phases of the project will result in a temporary increase in air
emissions, including particulate matter, that will cease, once construction is complete. No
operational impacts will occur with the exception of periods when particulates may temporarily
increase because of testing or use of emergency generators. Odor control mechanisms will be
incorporated into the project design to eliminate any nuisance odors. Additionally, contractors
must properly maintain their equipment, and frequent wetting of exposed soil and prompt soil
stabilization will minimize dust impacts. Contractors will be instructed to sell merchantable
timber and chip non-merchantable woody debris for mulch, or pile it along the edges of
construction corridors to create brush piles for wildlife. These practices will substitute for open
burning. However, if open burning is unavoidable, it must be conducted in accordance with state
and county regulations.
Noise Levels: Noise levels will increase during construction of both phases of the project.
however, once construction is complete, noise impacts from the operation of both phases of the
project will be negligible. Additionally, occasional noise will occur from the testing and use of
the emergency generators. Noise levels, due to this testing and use, will be infrequent and
therefore insignificant. To mitigate noise impacts from construction, construction activities will
occur only during daylight hours.
Water Resources: The proposed Killian Creek WWTP is bounded on the eastern edge of the site
by Killian Creek and the southern side by an unnamed tributary. An unnamed tributary with a
headwater seep wetland is located on the northeastern portion of the site. Three stream crossings
averaging 22 feet per crossing (66 total feet total) will occur during construction of the Phase I
conveyance system, while 24 stream crossings totaling approximately 45 feet (average width of
9.5 feet) will occur during the construction of Phase II conveyance system. Pre-construction
10
contours in streams and wetlands will be restored in accordance with USAGE and Division of
Water Quality (DWQ) permit conditions. All construction will also be conducted in accordance
with the DENR-approved Erosion and Sedimentation Control Plan and the SPCA. Open trench
construction at stream crossings will be performed roughly perpendicular to each chanciel, which
will minimize riparian vegetation clearing. After backfilling the trench, the lower banks of the
stream channel bed below the.ba k will be stabilized with rip-rap, and the upper banks will be
stabilized using nati=ve vegetation and seeding;, with a temporary groundcover crop.
Development within the service area must adhere to the Erosion and Sedimentation Control
Ordinance, and the Streamside Buffer Ordinance as well as any other applicable ordinances that.
exist or will be developed in the future. Additionally, the NCWRC recommends that Lincoln
County implement the recommendations as shown under wetlands, above.
Forest Resources: Of the 38 acres purchased by the County for the proposed Killian Creek
WWTP, 20 acres of the currently-forested site will be cleared for Phases I and II construction of
the WWTP. The remainder of the site will be retained in its current state. Construction of
Phases i and II of the conveyance system will require the disturbance of 12 acres of forested.
land. Contractors will be instructed to sell merchantable timber and chip non-merchantable
woody debris for mulch, or pile it along the edges of construction corridors to create brush piles
for wildlife.
Shellfish or Fish and Their Habitat: Killian Creek, the closest stream to the construction site, is
located on the eastern edge of the site more than 80 feet east of the project's footprint. Potential
impacts to fish and shellfish habitats during construction of the Phase I and Phase R conveyance
systems could occur, due to the proximity of the construction to Killian and Forney Creeks. To
minimize any potential impacts to shellfish or fish and their habitats, the contractors must follow
the provisions in the DENR-approved Erosion and Sedimentation Control Plan, as well as those
in the SPCA. Additionally, further development in this area must occur in accordance with the
Soil Erosion and Sedimentation Control Ordinance and the Streamside Buffer Ordinance as well
as other applicable ordinances that exist or may be developed in the future. Also, the NCWRC
recommends that Lincoln County implement the recommendations as shown under wetlands,
above.
Wildlife and Natural Vegetation: No protected species, neither flora nor fauna, are expected to
be impacted by the construction of either phase of the project. However, an additional
threatened and endangered species survey will be required during the detailed design.phase of
Phase It of the project.
Introduction of Toxic Substances: As part of the construction process, substances such as fuels,
lubricants, antifreeze, etc. will be used and may be introduced into the environment through
spillage or other events. All. construction activity will be performed in accordance with Federal,
State, and local rules and regulations to avoid environmental impacts.
The U.S. Fish and Wildlife Service reviewed the proposed project and concluded that the
requirements of Section 7(a)(2) of the Endangered Species Act have been fulfilled. The
NCWRC, the DWQ Mooresville Regional Office, and the NPDES and PERCS Units concur
with the proposed project. The North Carolina Department of Cultural Resources is not aware of
any properties of architectural, historical, or archaeological significance that would be affected
by the project. Other state agencies did not submit objections to the project.
G. Public Participation, Sources Consulted
A public hearing was held on November 21, 2005 on the proposed project. The current user
charge for .residents >within the former Er,:st Lincoln County Water & Sewer District is $2692 at
3,967 gallons per month. The.oposed project will result in an increased charge of $0.40 for a
total of $27.32 for 3,967 gallons per month for the typical user. No opposition, to the plan was
presented at the public hearing.
Sources consulted about this project for information or concurrence included:
1) Lincoln County
2) North Carolina Department of Environment and Natural Resources
-Wildlife Resources Commission
-DWQ Mooresville Regional Office - Surface water Protection Section
-DWQ NPDES Unit
-DWQ IaERCS Unit
-Division of Air Quality
-Division of Environmental Health
-Division of Water Resources
-Division of Forest Resources
Office of Legislative and Intergovernmental Affairs
3) North Carolina Department of Cultural Resources
4) North Carolina State Clearinghouse
5) U.S. Fish and Wildlife Service
6) U.S. Army Corps of Engineers
12
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