19930547 Ver 1_COMPLETE FILE_19930624

,?? U MAR 1 01993,
WWETLANDS CROUP
State of North Carolina v._r_: y `CATER ??,?Irr sl c?t?n?
Department of Environment, Health, and Natural Resources
512 North Salisbury Street • Raleigh, North Carolina 27604
James B. Hunt, Jr., Governor Jonath n B. Howes, Secretary
MEMORANDUM
TO: Monica Swihart
Division of Environmental Management
FROM: Melba McGee
Project Review Coordinator
RE: #514 - Four Mile Creek Sewer Outfall and
Pump Station, Mecklenburg County
DATE: January 13, 1993
The referenced project has been circulated among our internal
divisions for review. The attached comments are for your
consideration.
Thank you for the opportunity to respond. Please be sure a
copy of these conditions are forwarded to John Dorney for his file.
Project can be forwarded to the State Clearinghouse for further
state review.
MM: bb
Attachments
F.0. Box 27687. Raleigh, North Ca rolina 27ol1 7(,87 Telephone 9197;; ;1)8-4 fax d 919.-33{)513
An F:atul ()pIx>rturnit?, :\Ilirmativc Action hip!,
•er

® North Carolina Wildlife Resources Commission KN
512 N. Salisbury Street, Raleigh, North Carolina 27611, 919-733-3391
Charles R. Fullwood, Executive Director
MEMORANDUM
TO: Melba McGee, Division of Planning and Assessment
Department of Environment, Health & Natural Resources
FROM: Stephe9ozzanghera,
Habitat Conservation
DATE: January 5, 1992
Piedmont Regional Coordinator
Program
SUBJECT: Comment and Review of Four Mile Creek Sewer Outfall and
Pump Station Environmental Assessment (Revised December
1992), Mecklenburg County, North Carolina.
Project #458.
The North Carolina Wildlife Resources Commission (NCWRC) has
completed its review of the subject document submitted by the
Charlotte-Mecklenburg Utility Department as prepared by Hazen and
Sawyer, P.C. Our comments are provided in accordance with
certain provisions of the Fish and Wildlife Coordination Act (48
Stat. 401, as amended; 16 U.S.C. 661-667d), Section 201 of the
Clean Water Act of 1977 (as amended), and North Carolina General
Statutes (G.S. 113-131 et. seq.).
We were encouraged by the wetlands information, vegetative
cover type map, and endangered species account that was included
in this revised Environmental Assessment. NCWRC has no further
comment and/or objections to the project as proposed. We do,
however, have the following recommendations and wish that they be
considered as permit conditions:
1. The 1.79 acres of disturbed wetlands within the
project's force main and outfall corridor should be
sloped, graded, restored to original contour and seeded
to an annual small grain such as wheat, rye and/or
millet. We recommend that mowed maintenance not occur
in wetland areas and that they be allowed to revert to
a natural vegetative condition following this initial
stabilization.
Memo Page 2 January 5, 1992
2. If concrete encasement of the outfall and/or the sewer
line is to occur at McAlpine Creek or at any point
along Four Mile Creek, wet concrete should be
prevented from entering the streamflow. Wet concrete
is toxic to numerous aquatic organisms and should be
contained until such time that it has cured
sufficiently to prevent downstream travel.
3. Man-holes located within the 100 year flood plain
should be sealed and vented to prevent floodwater
intrusion and to eliminate sewage escape.
Thank you for the opportunity to review and provide comment
on this project. Should you have any questions, or wish to
discuss any of these comments please contact me at
[phone].
SAP
CC: Ken Knight
Wayne Chapman
Monica Swihart
DEPARTMENT OF THE ARMY
WILMINGTON DISTRICT, CORPS OF ENGINEERS
P.O. BOX 1890
WILMINGTON, NORTH CAROLINA 28402-1890
IN REPLY REFER TO June 15, 1993
Regulatory Branch
Action ID. 199302444 and Nationwide Permit No. 12 (Utility Line Backfill and
Bedding)
Mr. Thomas W. Vandeventer
Charlotte-Mecklenburg Utility Department
5100 Brookshire Boulevard
Charlotte, North Carolina 28216
Dear Mr. Vandeventer:
JUN 2 2 W3
Reference your application of April 13, 1993 and siiib? ent additional
information of May 4, 1993, for Department _of-th my autho ization to
construct approximately 30,000 linear !Pet of sanitar, sew outfall line
through waters and adjacent wetlands f Fourmile Creek fr m its confluence
with McAlpine Creek to Providence Ro d at Charlotte, IcZe u-n-W North
Carolina. According to information pr ided, ap imately 2,050 linear feet
of this utility line would traverse wetlan s with a 40-foot-wide corridor
impacting approximately 1.8 acres. The proposed line would cross McAlpine
Creek once and Four Mile Creek three times.
For the purposes of the U.S. Army Corps of Engineers' Regulatory Program,
Title 33, Code of Federal Regulations (CFR), Part 330.6, published in the
Federal Register on November 22, 1991, lists nationwide permits (NWP).
Authorization, pursuant to Section 404 of the Clean Water Act, was provided
for the discharge of material for backfill or bedding for utility lines,
including outfall and intake structures, provided 1) there is no change in
pre-construction contours, 2) in wetlands the top 6 inches to 12 inches of the
trench is backfilled with topsoil, 3) excess material is removed to upland
areas, and 4) any exposed slopes and streambanks are stabilized immediately
upon completion of the utility line.
Your work is authorized by this NWP provided it is accomplished in strict
accordance with the enclosed conditions. You are reminded that all wetlands
must be restored to their original pre-project contours and the temporary
crossing of Four Mile Creek must be removed in its entirety. This NWP does
not authorize any permanent access road construction. Restored wetlands areas
should not be seeded with upland vegetation but rather should be mulched and
left to revegetate naturally or seeded with wetland plant species. This NWP
does not relieve you of the responsibility to obtain any required State or
local approval. If you have not already done so, you should contact Mr. John
Dorney, N.C. Division of Environmental Management, at telephone [phone]
regarding state water quality certification for this work.
v
-2-
This verification will be valid for 2 years from the date of this letter
unless the nationwide authorization is modified, reissued, or revoked. Also,
this verification will remain valid for the 2 years if, during that period,
the nationwide permit authorization is reissued without modification or the
activity complies with any subsequent modification of the nationwide permit
authorization. If during the 2 years, the nationwide permit authorization
expires or is suspended or revoked, or is modified, such that the activity
would no longer comply with the terms and conditions of the nationwide permit,
activities which have commenced (i.e., are under construction) or are under
contract to commence in reliance upon the nationwide permit will remain
authorized provided the activity is completed within 12 months of the date of
the nationwide permit's expiration, modification or revocation, unless
discretionary authority has been exercised on a case-by-case basis to modify,
suspend, or revoke the authorization.
Questions or comments may be addressed to Mr. Steven Lund, Asheville Field
Office, Regulatory Branch, telephone [phone].
Sincerely,
G. Wayne Wright
Chief, Regulatory Branch
Enclosure
Copies Furnished (without enclosure):
Mr. John Parker Ms. Laurene C. Rhyne
North Carolina Department of Hazen & Sawyer, P.C.
Environment, Health and 2 Parkway Plaza, Suite 170
Natural Resources 4828 Parkway Plaza Boulevard
Post Office Box 27687 Charlotte, North Carolina 28217
Raleigh, North Carolina 27611-7687
-O r . John Dorney
Water Quality Section
Division of Environmental Management
North Carolina Department of
Environment, Health and
Natural Resources
Post Office Box 27687
Raleigh, North Carolina 27611-7687
State of North Carolina
Department of Environment,
Health and Natural Resources • •
Division of Environmental Management
James B. Hunt, Jr., Governor AdEftsdabodw
Jonathan B. Howes, Secretary
E H N
A. Preston Howard, Jr., P.E., Director
June 30, 1993
Mr. Thomas W. Vandeventer
Charlotte-Mecklenburg Utility Dept.
5100 Brookshire Blvd.
Charlotte, N.C. 28216
Dear Mr. Vandeventer:
Subject: Proposed fill in Wetlands or Waters
Four mile creek sewer line
Mecklenburg County
DEM Project # 93547, COE# 199302444
Upon review of your request for 401 Water Quality Certification to place fill material in 0.35
acres of wetlands or waters which are tributary to Four Mile Creek for sewer line construction located
along Four Mile Creek form CmAlpine Creek to Providence Road in Mecklenburg County as described
in your submittal dated 23 June 1993, we have determined that the proposed fill can be covered by
General Water Quality Certification No. 2664 issued January 21, 1992. A copy of the General
Certification is attached. This Certification may be used in qualifying for coverage under Corps of
Engineers' Nationwide Permit No. 12. An additional condition is that antiseep collars shall be placed at
no more than 150 feet intervals within wetland boundaries.
If this Certification is unacceptable to you, you have the right to an adjudicatory hearing upon
written request within thirty (30) days following receipt of this Certification. This request must be in the
form of a written petition conforming to Chapter 150B of the North Carolina General Statutes and filed
with the Office of Administrative Hearings, P.O. Box 27447, Raleigh, N.C. 27611-7447. Unless such
demands are made, this Certification shall be final and binding.
If you have any questions, please contact John Dorney at 919-733-1786.
Sincerely,
i (i
93547.Itr Preston Howard, Jr. P.E
Attachment
cc: Wilmington District Corps of Engineers
Corps of Engineers Asheville Field Office
Mooresville DEM Regional Office
Mr. John Dorney
Central Files
Caurence Rhyne; Hazen and Sawyer
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/ 10% post consumer paper
RAZEN AND SAWYER Hazen and Sawyer, P. C.
2 Parkway Plaza, Suite 170
Environmental Engineers & Scientists 4828 Parkway Plaza Blvd.
Charlotte, NC 28217
704 357-3150
Fax: [phone]
June 23,1993
N.C. Department of Environment, Health and Natural Resources
Division of Environmental Management
Water Quality Planning
219 East North Street
Raleigh, North Carolina 27610
Attn: Mr. Eric Galamb
Re:
Dear Eric:
R. T11
JUN 2 419
WETLANDS GROUP
WATER QUALITY SECTION
401 Certification
4-Mile Creek Outfall
Charlotte Mecklenburg Utility Department
H&S No. 6113 (04)
Enclosed please find seven (7) copies of our original 404 application and permit.
As we discussed, we are anxious to complete this permit and would appreciate any
effort you could make to expedite the process. The project is scheduled for
advertisement on July 10, 1993 and for bid on August 10, 1993.
If you have any questions, or require any additional information, please do not hesitate
to call.
Sincerely,
HAZEN AND SAWYER, P.C.
Laurene C. Rhyne, P.
Principal Engineer
LCR/kf
Enclosures
New York, NY - Armonk, NY - Upper Saddle River, NJ - Raleigh, NC - Charlotte, NC - Richmond, VA - Hollywood, FL - Boca Raton, FL - Fort Pierce, FL - Jupiter, FL - Miami, FL - Bogota, D.E. Colombia

DEPARTMENT OF THE ARMY
00
WILMINGTON DISTRICT, CORPS OF ENGINEERS
P.O. BOX 1890
WILMINGTON, NORTH CAROLINA 28402-1890
IN REPLY REFER TO June is, 1993
Regulatory Branch
Action ID. 199302444 and Nationwide Permit No. 12 (Utility Line Backfill and
Bedding)
Mr. Thomas W. Vandeventer'
I
Charlotte-Mecklenburg Utility Department 5100 Brookshire Boulevard
ffWETLANnqrPniiD
Charlotte, North Carolina 28216 Dear Mr. Vandeventer:

Reference your application of April 13, 1993 and subsequent additional
information of May 4, 1993, for Department of the Army authorization to
construct approximately 30,000 linear feet of sanitary sewer outfall line
through waters and adjacent wetlands of Fourmile Creek from its confluence
with McAlpine Creek to Providence Road at Charlotte, Mecklenburg County, North
Carolina. According to information provided, approximately 2,050 linear feet
of this utility line would traverse wetlands-with a 40-foot-wide corridor
impacting approximately 1.8 acres. The proposed line would cross McAlpine
Creek once and Four Mile Creek three times.
For the purposes of the U.S. Army Corps of Engineers' Regulatory Program,
Title 33, Code of Federal Regulations (CFR), Part 330.6, published in the
Federal Register on November 22, 1991, lists nationwide permits (NWP).
Authorization, pursuant to Section 404 of the Clean Water Act, was provided
for the discharge of material for backfill or bedding for utility lines,
including outfall and intake structures, provided 1) there is no change in
pre-construction contours, 2) in wetlands the top 6 inches to 12 inches of the
trench is backfilled with topsoil, 3) excess material is removed to upland
areas, and 4) any exposed slopes and streambanks are stabilized immediately
upon completion of the utility line.
Your work is authorized by this NWP provided it is accomplished in strict
accordance with the enclosed conditions. You are reminded that all wetlands
must be restored to their original pre-project contours and the temporary
crossing of Four Mile Creek must be removed in its entirety. This NWP does
not authorize any permanent access road construction. Restored wetlands areas
should not be seeded with upland vegetation but rather should be mulched and
left to revegetate naturally or seeded with wetland plant species. This NWP
does not relieve you of the responsibility to obtain any required State or
local approval. If you have not already done so, you should contact Mr. John
Dorney, N.C. Division of Environmental Management, at telephone [phone]
regarding state water quality certification for this work.

-2-
This verification will be valid for 2 years from the date of this letter
unless the nationwide authorization is modified, reissued, or revoked. Also,
this verification will remain valid for the 2 years if, during that period,
the nationwide permit authorization is reissued without modification or the
activity complies with any subsequent modification of the nationwide permit
authorization. If during the 2 years, the nationwide permit authorization
expires or is suspended or revoked, or is modified, such that the activity
would no longer comply with the terms and conditions of the nationwide permit,
activities which have commenced (i.e., are under construction) or are under
contract to commence in reliance upon the nationwide permit will remain
authorized provided the activity is completed within 12 months of the date of
the nationwide permit's expiration, modification or revocation, unless
discretionary authority has been exercised on a case-by-case basis to modify,
suspend, or revoke the authorization.
Questions or comments may be addressed to Mr. Steven Lund, Asheville Field
Office, Regulatory.Branch, telephone [phone].
Sincerely,
G. Wayne Wright
Chief, Regulatory Branch
Enclosure
Copies Furnished (without enclosure) :
Mr. John Parker Lauren C. Rhyne
North Carolina Department of Hazen & Sawyer, P.C.
Environment, Health and 2 Parkway Plaza, Suite 170
Natural Resources 4828 Parkway Plaza Boulevard
Post Office Box 27687 Charlotte, North Carolina 28217
Raleigh, North Carolina 27611-7687
Mr. John Dorney
Water Quality Section
Division of Environmental Management
North Carolina Department of
Environment, Health and
Natural Resources
Post Office Box 27687
Raleigh, North Carolina 27611-7687
APPLICATION FOR DEPARTMENT OF THE ARMY PERMIT OMB APPROVAL NO. 0702-0036
(33 CFR 325) Expires 30 June 1992
Public reporting burden for this collection of information is estimated to average 5 hours per response for the majority of cases, including the time for reviewing
instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information.
Applications for larger or more complex projects, or those in ecologically sensitive areas, will take longer. Send comments regarding this burden estimate or any
other aspect of this collection of information, including suggestions for reducing this burden, to Washington Headquarters Services, Directorate for Information
Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302; acid to the Office of information and Regulatory Affairs, Office
of Management and Budget, Washington, DC 20503.
The Department of the Army permit program is authorized by Section 10 of the Rivers and Harbors Act of 1899. Section 404 of the Clean Water Act and
Section 103 of the Marine, Protection, Research and Sanctuaries Act. These laws require permits authorizing activities in or affecting navigable waters of the
United States, the discharge of dredged or fill material into waters of the United States, and the transportation of dredged material for the purpose of dumping it
into ocean waters. Information provided on this form will be used in evaluating the application for a permit. Information in this application is made a matter of
public record through issuance of a public notice. Disclosure of the information requested is voluntary; however, the data requested are necessary in order to
communicate with the applicant and to evaluate the permit application. If necessary information is not provided, the permit application cannot be processed nor
can a permit be issued.
One set of original drawings or good reproducible copies which show the location and character of the proposed activity must be attached to this application
(see sample drawings and instructions) and be submitted to the District Engineer having jurisdiction over the location of the proposed activity. An application
that is not completed in full will be returned.
1. APPLICATION NUMBER (To be assigned by Corps) 3. NAME, ADDRESS, AND TITLE OF AUTHORIZED AGENT
Hazen and Sawyer
4828 Parkway Plaza Blvd. Ste.170
Charlotte, NC 28217
Attn: Laurene C. Rhyne
Tele
hone no
d
ri
b
i
h
p
.
u
ng
us
ness
ours
2. NAME AND ADDRESS OF APPLICANT
Charlotte Mecklenburg Utility Dept. A/C ( ? (Residence)
5100 Brookshire Blvd. A/C(704) 357-3150 (Ollice)
Ch
l
tt
NC 28216
ar
o
e,
Attn: Thomas W. Vandeventer Statement of Authorization: I hereby designate and authorize
Hazen and Sawyer to act in my
Telephone no. during business hours behall as my agent in the processing of this permit application and to
lurnis ,upon request, supplemental inlormalion in support of the application.
A/C ( ) (Rosidonco)
A/c(704) 399-2551 (Office) SIGN URE OF APPLICANT
/ DATE

4. DETAILED DESCRIPTION OF PROPOSED ACTIVITY
4a. ACTIVITY Construction o approx. 600 LF o 24-inch orce main DIP an approx. 24,500 LF of
gravity sewer outfall generally paralleling 4-Mile Creek at an elevation below the flow line of
the creek. The construction will involve approx. 2050 LF of line through wetlands, involving
approx. 1.8 acres. A 40 foot maximum construction easement is utilized. Excavation for the
pipe ranges from 8 to 12 feet deep. Total excavation and backfill will be approx. 7300 cu.yd.
Finished grade will be restored to original conditions and all work will be conducted in
accordance with all applicable rules and regulations. A Finding of No Significant Impact(FONSI
been issued by the N.C. Division of Environmental Management.
4b. PURPOSE The proposed project is for the use and benefit of the public, and replaces an
existing outfall which is undersized. Currently, during peak loads, raw sewage overflows the
existing outfall creating health hazards and adverse environmental conditions. In addition
to overloading problems, the existing outfall is too high for existing development on the south
side of the creek to reach without aerial creek crossings which are subject to hazards
associated with breaks.and leaks. The new outfall will eliminate the aerial crossings.
4c. DISCHARGE OF DREDGED OR FILL MATERIAL
Fill material will consist of 24-inch ductile iron pipe (DIP) and 30 and 36-inch PVC and DIP
pipe, stone bedding below the ppipe and native materials from the excavation above the pipe.
Stone will be Size ()67 ASTM D448
l
l
angu
ar, c
ean, washed crushed stone. Native materials are
predominately Type II Monacan, a nearly level somewhat poorly drained alluvium of rece
t
n
deposition consisting of sandy loam and silty clay loam. Pipe and stone bedding will be
transported to the site along the sewer line route and from adjacent routes accessible to the
site through non-wetland areas. No stockpiling material or spoil in the wetland areas will
be permitted.
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LOCATION MAP
VICINITY MAP
CHARLOTTE MECKLENBURG UTILITY DEPARTMENT
PROPOSED SANITARY SEWER OUTFALL
FOUR MILE CREEK - MECKLENBURG COUNTY - NORTH CAROLINA
NOVEMBER 1991 SHEET 1 OF 4
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\\ ! AO i r r ra x \
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536.4. \r \ 1
SCALE: t' = 200'
WETLAND AREAS - PLAN
CHARLOTTE MECKLENBURG UTILITY DEPARTMENT
PROPOSED SANITARY SEWER OUTFALL
FOUR MILE CREEK - MECKLENBURG COUNTY - NORTH CAROLINA
NOVEMBER 1991 SHEET 2 OF 4
?" . NORTH/ x
?? 529.7
530.2
x
X x
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X
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?) .
530.9 s3s 532- x 860 ACRES
.INCH OUTFAL ' x
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223-241-10 'a1, ,--
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530.8 ? ! 7lr V
?I?TO x PROPOSED
53U MANHOLE
5315
WETLAND /
AREA 4
WETLAND .184 ACRES
3
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MANHOLE
537.1 ? ` \ ?.?- Zh •`?
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ASSOCIATION MANHOLE „f
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100 YEAR FLOOD .s.2
tix
?-
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.
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+ A?j
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TENTATIVE PENDING ' - x,?
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349 ACRES -?]• -
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x 5?6.3i -7, i I `567..lpl?'w .: .
WETLAND AREAS - PLAN
CHARLOTTE MECKLENBURG UTILITY DEPARTMENT
PROPOSED SANITARY SEWER OUTFALL
FOUR MILE CREEK - MECKLENBURG COUNTY - NORTH CAROLINA
NOVEMBER 1991 SHEET 3 OF 4
EXISTING GRADE
SIDE SLOPE AT I:I
OR SHEETING &
BRACING

I/3 D?
NOTE:
THERE IS NO STANDING WATER
ON THE SITE. SEASONAL WATER
TABLE IS TYPICALLY .5 TO 2
FEET IN WINTER AND SPRING
Cl
No 67 STONE 6 It t
A D A
TYPE 11 EMBEDMENT
DIMENSIONS
D A
24 8"
30 8"
36 12"
SCALE %4° = I'
TYPICAL EXCAVATION CROSS SECTION
CHARLOTTE MECKLENBURG UTILITY DEPARTMENT
PROPOSED SANITARY SEWER OUTFALL
FOUR MILE CREEK - MECKLENBURG COUNTY - NORTH CAROLINA
SHEEET 4 of 4
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SUPPLEMENTAL INFORMATION
CHARLOTTE MECKLENBURG UTILITY DEPARTMENT
PROPOSED SANITARY SEWER OUTFALL
FOUR MILE CREEK - MECKLENBURG COUNTY - NORTH CAROLINA
MAY 1993 SHEET 1 OF 5
fE DUKE TRANSMISSION UNE
AND 80' R/W
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SUPPLEMENTAL INFORMATION
CHARLOTTE MECKLENBURG UTILITY DEPARTMENT
PROPOSED SANITARY SEWER OUTFALL
FOUR MILE CREEK - MECKLENBURG COUNTY - NORTH CAROLINA
MAY 1993 SHEET 2 OF 5
WERAN`DS ONST.
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SUPPLEMENTAL INFORMATION
CHARLOTTE MECKLENBURG UTILITY DEPARTMENT
PROPOSED SANITARY SEWER OUTFALL
FOUR MILE CREEK - MECKLENBURG COUNTY - NORTH CAROLINA
MAY 1993 SHEET 3 OF 5
#I ,TEE G?yS?,' GOLF COURSE
26 'BOX 4 'Os ' - 167 cf FIRST FAIRWAY
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' 25' RAW
125
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SUPPLEMENTAL INFORMATION
CHARLOTTE MECKLENBURG UTILITY DEPARTMENT
PROPOSED SANITARY SEWER OUTFALL
FOUR MILE CREEK - MECKLENBURG COUNTY - NORTH CAROLINA
MAY 1993 SHEET 4 OF 5
•w- II.S+UU 114+00 115+00 116+00

#467 COARSE AGGREGATE 6" OE=-?.
EXTEND 25 EACH SIDE OF BANKS.-
I tt.
I ft. min.
I
i
25' %`--
6" #467 STONE
RIP RAP
STD. DET. #29
NOTES:
1. SLOPE APPROACHES TO CROSSING 2:1 OR FLATTER:
2. SPILLWAY LENGTH = BANK TO BANK WIDTH OF STREAM
OR AS SHOWN ON PLANS.
3. PIPE TO EXTEND COMPLETELY ACROSS PERMANENT
RIGHT OF WAY AND I ft BEYOND LIMITS OF RIP RAP.
4. CROSSING TO BE REMOVED UPON COMPLETION OF CONSTRUCTION.
RIP RAP STONE TO SE USED TO RIP RAP BANKS.
('I [ARLOTTE-MECKLENBURG
UTILITY DEPARTMENT
ENGINEERING DIVISION
CHARLOTTE, NORTH CAROLINA
-• STANDARD DETAIL
•^ NOW EROSION CONTROL
• "`^• "°"E TEMPORARY.
STREAM
3,
SUPPLEMENTAL INFORMATION
CHARLOTTE MECKLENBURG UTILITY DEPARTMENT
PROPOSED SANITARY SEWER OUTFALL
FILL WITH CMUD
.STANDARD RIP RAP
ROCK.
PIPE SIZED TO CARRY
NORMAL FLOW WHEN
FLOWING HALF FULL
USE DUCTILE IRON,
CMP OR RCP ONLY.
FOUR MILE CREEK - MECKLENBURG COUNTY - NORTH CAROLINA
MAY 1993 SHEET 5 OF 5
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Four Mile Creek
Sanitary Sewer Outfall and Pumping Station
Environmental Assessment
1. Proposed Facilities and Actions, Funding Sources
The proposed project includes a parallel gravity outfall, elimination of existing
aerial creek crossings, wastewater pumping station and a force main to the Charlotte-
Mecklenburg Utility Department's (CMUD) existing McAlpine Creek Outfall. The
project will provide wastewater collection for the Four Mile Creek Basin service area of
which approximately eleven percent is located within the City of Matthews, twenty-six
percent located within the City of Charlotte and sixty-three percent in unincorporated
areas of Mecklenburg County. The proposed project service areas are located entirely
within the 20 year growth area of the City of Charlotte and the City of Matthews.
The proposed project consists of approximately 24,500 L.F. of 30"-36" gravity
outfall running along Four Mile Creek, lowering of 7 existing aerial crossings, a 6 MGD
average daily flow pumping station and a .24" force main. The proposed outfall
generally parallels the existing Four Mile Creek Outfall at an elevation below the flow
line of Four Mile Creek. Project limits are between the confluence of Four Mile Creek
and McAlpine Creek and Providence Road. Wastewater will be transported to the
proposed pumping station via the proposed outfall and discharged through
approximately 600 L.F. of 24" force main to the existing 54" McAlpine Outfall where it
will be conveyed to the existing McAlpine Wastewater Treatment Plant for treatment.
The proposed project will eliminate overflows at manholes on the existing Four Mile
Creek Outfall during high flow periods as well as provide for future wastewater flows
from..currently-undevelope-d . and in the Four Mile Creek Basin. The project will be
constructed in one phase. A map showing the proposed project is presented in
Figure 1.
The cost of the project is estimated to be approximately six million dollars and
will be obtained from City of Charlotte funds.
- 1 -
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I
2. Existing Environment
2.1 Topography and Soils
The City of Charlotte is located in the southern portion of Mecklenburg County
which lies entirely within the southern physiographic region. It is characterized by
broad, gently rolling interstream areas and by steeper slopes along the drainage ways.
Differences in elevation range from 50 to 100 feet from the highest to the lowest
points. Elevations in the County range from 540 feet above sea level in Pineville to a
high point of 830 feet in Cornelius.
Mecklenburg County is composed of soils from eight soil associations: Cecil,
Cecil-Urban Land, Iredell-Mecklenburg, Wilkes-Enon, Enon-Helena-Vance, Pacolet-
Cecil, Monacan and Georg evil le-Go ldston-Lignum. A soil association consists of a
landscape having a distinctive proportional pattern of soils. Soils in the Four Mile
Creek Basin are located within the Cecil, Iredell-Mecklenburg and Wilkes-Enon soil
associations. These three soil associations consist of gently sloping to steep with
moderately well drained to well drained soils. All three classifications have a
predominately clayey subsoil. The Cecil was formed in residuum from acid igneous
and metamorphic rock; the Iredell-Mecklenburg from diorite, gabbro, and other rock
high in ferromagnesian minerals; and the Wilkes-Enon from diorite, hornblende schist,
and other basic rock, or from mixed acidic and basic rock.
The project is located in the floodway and floodway fringe of Four Mile Creek in
...._._
.......... ...... ......
Southern Mecklenburg County. The area's predominate soil Type II Monacan, a
nearly level, somewhat poorly drained soil formed by recent alluvium deposits on the
floodplain. The surface layer is brownish loam, fine sandy loam or sandy loam. The
subsoil is reddish loam in the upper part and brownish or grayish silty clay loam, fine
sandy loam, sandy clay loam, and sandy clay in the lower part. This soil classification
is further characterized by low organic matter in the surface layer, moderate
permeability, low shrink-swell potential and slow surface runoff. The available water
capacity is high. The soil is strongly acid to neutral. Depth to bedrock is typically
more than 60 inches. Fill has been added in some areas.
-2-
The seasonal water table is .5 to 2 feet in winter and spring. Some areas
adjacent to the pipeline route are inundated with standing water apparently held in
place by logs and debris resulting from Hurricane Hugo which have blocked the flow
of Four Mile Creek in several places.
Approximate 1.79 acres of wetlands ed upon a 40' wide construction
easement) are expected o e project. This acreage includes wetlands
along the outfall as well as along the force main from the pumping station as it
crosses McAlpine Creek to tie to the existing 54" McAlpine Creek Outfall. Wetlands
are discussed further in Section 6.2.
2.2 Surface Waters
In general, the land in the County slopes in a southwesterly direction, the
general flow for the major streams, which include the Catawba River and its

tributaries: McDowells Creek, Long Creek, Paw Creek, Sugar Creek and McApline
Creek. The Catawba River drains approximately 75% of the County while the
remaining 25% is drained by the North and South Forks of Crooked Creek which are
tributaries of the Pee Dee Rive
2.3 Groundwater
The vast majority of water supply in Mecklenburg County is obtained from
surface water sources which is treated and distributed by the Charlotte-Mecklenburg
Utility Department. However, groundwater is utilized to supply some subdivisions,
mobile home parks, commercial establishments and industries. Groundwater is
reported to be of good-to-excellent quality throughout most of the County.
2.4 Land Use
Existing land use in the project area is primarily residential, light commercial,
recreational and agricultural. Thirteen (13) major subdivisions and two golf courses
(Raintree and Piper Glen) are located within the project area.
-3-
3. Existing Wastewater Facilities
Existing wastewater facilities include the existing Four Mile Creek Outfall, minor
collectors, and the McAlpine Wastewater Treatment Plant which is located
approximately one mile south of the project area and which discharges to McAlpine
Creek, a tributary of the Catawba River.
4. Need for the Proposed Facilities and Actions
The existing Four Mile Creek Outfall is undersized to serve the Four Mile Creek
Drainage Basin which is located within the 20 year growth areas of the Cities of
Charlotte and Matthews. Currently, during times of peak flows, the existing outfall
overflows raw sewage creating health hazards and adverse environmental conditions.
Additionally, the existing outfall is located on the north side of Four Mile Creek at an
elevation which necessitates aerial crossings to serve current development on the
south side of the creek. These aerial crossings impose a substantial threat to the
environment should they, at anytime, break. The proposed project will eliminate these
aerial crossings in addition to rectifying the overflow situation during times of peak
flows.
Proposed facilities are sized based on full development in the Four Mile Creek
Basin in accordance with current land use plans and Charlotte-Mecklenburg Utility
Department standard design flows. Peak flows are based on a factor of 2.5 times
average flow. Average daily flow from the total service area is projected to be
approximately 6.0 MGD.
5. Alternative Analysis
An extensive alternative analysis of route selection and pumping station location
was performed for the proposed project and is described in a document prepared for
CMUD by Hazen and Sawyer, P.C. entitled "Concept Report and Route Selection,
Four Mile Creek Parallel Outfall, September, 1991."
-4-
In addition to a "no-action" alternative, five alternative routes were studied for
the proposed outfall as well as consideration given to replacing the existing outfall in
its current location. Likewise, since a pumping station is required to service any outfall
alternative which is placed at an elevation below the flow line of Four Mile Creek, an
alternative analysis was similarly performed for four different pumping station sites.
The alternative analysis for route selection included seven alternatives as
follows:
• No action.
• Replace existing outfall in current location.
• Parallel existing outfall.
• High North Side - generally parallels existing outfall on the north
side of Four Mile Creek at a lower elevation than the existing
outfall but at an elevation above that of the flow line of Four Mile
Creek.
• High South Side - an outfall routed on the south side of Four Mile
Creek but placed at an elevation above that of the flow line at
Four Mile Creek.
• Low North - an alternative placing the proposed outfall on the
north side of Four Mile Creek at an elevation below that of the
flow line of the creek.
• Low South - an alternative placing the proposed outfall on the
south side of Four Mile Creek at an elevation below that of the
flow line of the creek.
-5-
The above alternatives are illustrated on Figures C1 through C8 entitled
"Design Concept and Route Selection". The eight figures show the total route from
Providence Road to McAlpine Creek.
The alternatives were screened utilizing 10 basic comparison factors. Table 1,
"Outfall Screening Matrix-Alternative Routing-Four Mile Creek Outfall", depicts the
results of the screening process for the five feasible alternatives.
Results of the screening process for each alternative are presented as follows:
• No-Action - Reiected - Without the project, discharge of raw
sewage through surcharged manholes would continue and
increase as the existing outfall deteriorates with age and additional
demand is placed on the system.
• Replace Existing Outfall in Current Location - Rejected - Existing
outfall is built within several subdivisions and passes between
homes with as little as 20-feet separation. Construction would
have severe negative impact on existing structures. Likewise, this
alternative, due to its placement at a relatively high elevation,
would not serve many areas of the drainage basin by gravity.
• Parallel Existing Outfall - Reiected - Same reasons as replacing
existing outfall in-place.
• High North Side of Four Mile Creek - Reiected - This route,
although generally lower in elevation than the existing outfall,
created substantial adverse impact on existing homes and
property. Likewise, it would not allow serving the entire drainage
basin by gravity.
• High South Side of Four Mile Creek - Rejected - Same reasons as
those for rejecting High North Route.
-6-

N 488,000
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DE90NE D 8T DATE SEPT. 1991
MD JOB
D1""" .NT DESIGN CONCEPT AND ROUTE SELEC TION si?3
NIA
CMECOCE D
CONTRACT
DRAIMNC
PRO.Lo+ Rw
cR NUMBER NUMBER
_ FOUR MILE CREEK PARALLEL OUTF ALL I
0 C I
C
.
N0. ISSUED FOR DATE BY APPROV ED SHEET OF
9T DATE SEPT. 1991
o®a+m
DRAWN MDH_NT DESIGN CONCEPT AND ROUTE SELECTION HU ER 0B 6113
aeacm CONMACT DRAYAN
?"aO" Rw N ?
FOUR MILE CREEK PARALLEL OUTFALL i n ?
OF
DESGNEO ST
DRAW M-H SIGN CONCEPT AND ROUTE SELECTION
D
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ROJENn+

w DATE SEPT. 1991
NUMBER 6113
CONTRACT DRAIMNO
FOUR MILE CREEK PARALLEL OUTFALL 1 NUMBER .0 N3
I.0 C 3
APPROVED SHEET OF .
A
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x
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LEGEND
D=NG SANITARY SEWER LINES
PROPOSED HGH ROUTE NORTH SIDE
PROPOSED LOW ROUTE NORTH SIDE
PROPOSED LOW ROUTE SOUTH SIDE ! ' \
-&-PROPOSED HGH ROUTE SOUTH SIDE
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DESIGNED BT DALE SEPT. 1991
MDH:NT DESIGN CONCEPT AND ROUTE SELECTION Nun 6113
ume 4
9 PROJ.ENOR. RW FOUR MILE CREEK PARALLEL OUTFALL "
1.0 C 4
NO. ISSUED FOR DATE BY APPROVED SHEEP OF
e
DMGNED BT oATE SEPT. 1991
DRAWN MDH
CHECK NT
DESIGN CONCEPT AND ROUTE SELECTION H t s .roe
"U 6113
PRO,LENW RW
FOUR MILE CREEK PARALLEL OUTFALL CONTRACT
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The above alternatives are illustrated on Figures C1 through C8 entitled
"Design Concept and Route Selection". The eight figures show the total route from
Providence Road to McAlpine Creek.
The alternatives were screened utilizing 10 basic comparison factors. Table 1,
"Outfall Screening Matrix-Alternative Routing-Four Mile Creek Outfall", depicts the
results of the screening process for the five feasible alternatives.
Results of the screening process for each alternative are presented as follows:
• No-Action - Reiected - Without the project, discharge of raw
sewage through surcharged manholes would continue and
increase as the existing outfall deteriorates with age and additional
demand is placed on the system.
• Replace Existing Outfall in Current Location - Rejected - Existing
outfall is built within several subdivisions and passes between
homes with as little as 20-feet separation. Construction would
have severe negative impact on existing structures. Likewise, this
alternative, due to its placement at a relatively high elevation,
would not serve many areas of the drainage basin by gravity.
• Parallel Existing Outfall - Rejected - Same reasons as replacing
existing outfall in-place.
• High North Side of Four Mile Creek - Reiected - This route,
although generally lower in elevation than the existing outfall,
created substantial adverse impact on existing homes and
property. Likewise, it would not allow serving the entire drainage
basin by gravity.
• High South Side of Four Mile Creek - Rejected - Same reasons as
those for rejecting High North Route.
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4V AN 41 > y,
April 13, 1992
John This project came through when I first took over the EA reviews
from Alan Clark (actually they claimed he lost it earlier but that was
a lie). Anyway, because of your workload at the time, I figured I
could provide the usual comments.and not have to worry you. (Alan
had given me copies of the old ones.) Now after reading Wildlife's
comments, we need to decide whether we need exact areas of losses,
on maps, descriptions of wetland types, and mitigation details in this
document or is it acceptable to have, them in the 404/401
documents? If we and Wildlife require it here, does it mean that we
will have the same opinion when, a 401 review is presented?
Please look at the wetland section and discuss it with your staff
decide where we want to come down on the issue. Lets discuss at
the latter part of this week if possible.
B oy?d? J
0 North Carolina Wildlife Resources Commission 0
512 N. Salisbury Street, Raleigh, North Carolina 27604-1188, 919-733-3391
Charles R. Fullwood, Executive Director
MEMORANDUM
TO: Melba McGee, Division of Planning and Assessment
Dept. of Environment, Health & Natural Resources
FROM: Dennis L. Stewart, Manager
Habitat Conservation Program
DATE: April 8, 1992
SUBJECT: Four Mile Creek Sewer Outfall and Pump Station Environmental
Assessment (EA), Charlotte-Mecklenburg utility Department, Mecklenburg
County, North Carolina. Project # 458.
The North Carolina Wildlife Resources Commission (NCWRC) has completed a
review of the subject document and biologists on our staff are familiar with habitat values
within the project area. Our comments are provided in accordance with certain provisions
of the Fish and Wildlife Coordination Act (48 Stat. 401, as amended; 16 U.S.C. 661-667d),
Section 201 of the Clean Water Act of 1977 (as amended), and North Carolina General
Statutes (G.S. 113-131 and 113-132).
The proposed project includes a parallel gravity outfall, elimination of existing
aerial creek crossings and construction of a wastewater pumping station and force main to
the Charlotte-Mecklenburg Utility Department's (CMUD) existing McAlpine Creek
outfall. The project (with the exception of the pumping station), will occur within the 100
year floodplain of Four Mile Creek in Southern Mecklenburg County and includes
construction of a total of 25,100 ft. of gravity and/or force main sewerline. Construction of
a 50 ft. wide easement for the project w I impact a total of 2.24 acres of wetlands. New
construction easements will have a maximum cleared width of 55 feet and a permanent
easement of 30 ft. The force main will have a permanent easement of 20 ft. through 300 ft.
of wetlands as it crosses McAlpine Creek.
NCWRC has the following comments and/or concerns that should be resolved prior
to initiation of project construction:
1. The maximum allowable construction easement width should be decreased
from 55 ft. to 50 ft. NCWRC has considerable experience in dealing with
project engineers and consultants on water and sewerline projects and
believes this request is both warranted and reasonable. Additionally,
NCWRC recommends that the 30 ft. permanent easement for the gravity
Memo
(2) date
outfall be decreased to 20 ft. Exception can be made for maintenance access
required of water and sewerline appurtenances.
2. The statement found on page 11 of the document that..."No threatened or
endangered species are expected to be impacted by the proposed pro ect" is
not supported with any agency documentation (i.e., U.S. Fish and Wi?dlife
Service, NC)ArRC, Natural Heritage Program). NCWRC has reason to
believe that several species of rare, threatened and/or endangered
salamanders could potentially inhabit creek drainages within Mecklenburg
County. Any environmental assessment should include species
documentation for fish and wildlife that are known to occur within the
project area.
3. While the document states on page 3 that 2.24 acres of wetlands will be
impacted by project construction it does not include a wetlands location map
and/or wetlands descriptions. Such information is essential in an
environmental assessment and should be included for agency review.
4. Discussion of mitigation for wetland impacts will not be possible until
wetland locations and descriptions are provided to this agency.
Thank you for the opportunity to review and comment on this Environmental
Assessment. We look forward to working with CMUD and Hazen and Sawyer, consultants
to resolve NCWRC concerns. If we can be of additional assistance please advise.
DLS/lp
cc: Wayne Chapman, District 6 Fisheries Biologist
Ken Knight, District 6 Wildlife Biologist
Steve A. Pozzanghera, Piedmont Region Habitat Biologist
W "I
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State of North Carolina
Department of Environment, Health, and Natural Resources
Division of Forest Resources
512 North Salisbury Street • Raleigh, North Carolina 27611
James G. Martin, Governor
William W. Cobey, Jr., Secretary
M7Mn'PA M7)TTM
Griffiths Forestry Center
2411 Garner Road
Clayton, North Carolina 27520
March 17, 1992
T ?.
FROM: Don H. Robbins ? ?/j? /?
Staff Forester ?7
Forestry
q ? po
N.C. - Where it all began
Stanford M. Adams
Director
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MAR 1992
D EHNR
PLANNING &
ASSESSMENT
S
SUBJECT: Charlotte-Mecklenburg Utility Department EA for Four Mile Creek
Sanitary Sewer Outfall and Pump Station
PROJECT #458
DUE DATE 3-25-92
We have reviewed the above subject document and have the following comments:
1. The document does not indicate what impact will occur to woodland.
Even though this is in_ an urban setting it appears that woodland
will be impacted. We would like more information on the affected
woodland to include -
a. Description of timber types and current conditions.
b. Acres of woodland that is to be affected.
2. The contractor should make attempts to salvage merchantable trees
for pulpwood and sawtimber that have to be cut to permit all
construction activities.
3. Trees outside construction limits should be protected from
construction activities to avoid:
a. Skinning of tree trunks by machinery.
b. Soil compaction and root exposure or injury by heavy equipment.
C. Adding layers of fill dirt over the root systems of trees, a
practice that impairs root aeration.
d. Accidental spilling of petroleum products or other damaging
substances over the root systems of trees.
DHR:la
pc: Warren Boyette - CO
File P.O. Box 27687, Raleigh, North Carolina 27611-7687 Telephone [phone]
An Equal Opportunity Affirmative Action Employer
State of North Carolina Reviewing Office:
Department of Environment, Health, and Natural Resources

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INTERGOVERNMENTAL REVIEW - PROJECT COMMENTS Project Number: Due Date: I
/-/,k` ? 3;25= 0?
After review of this project it has been determined that the EHNR permit(s) and/or approvals indicated may need to be obtained in
order for this project to comply with North Carolina Law.
Questions regarding these permits should be addressed to the Regional Office indicated on the reverse of the form.
All applications, information and guidelines relative to these plans and permits are available from the same Normal Process
Regional Office. Ti-
PERMITS SPECIAL APPLICATION PROCEDURES or REQUIREMENTS (statutory time
limit)
Permit to construct & operate wastewater treatment Application 90 days before begin construction or award of 30 days
facilities, sewer system extensions, & sewer construction contracts On-site inspection. Post-application
systems not discharging into state surface waters. technical conference usual (90 days)
NPDES - permit to discharge into surface water and/or Application 180 days before begin activity. On-site inspection. 90-120 days
permit to operate and construct wastewater facilities Pre-application conference usual. Additionally, obtain permit to
discharging into state surface waters. construct wastewater treatment facility-granted after NPDES. Reply (N/A)
time, 30 days after receipt of plans or issue of NPDES
permit-whichever is later.
30 days
Water Use Permit Pre-application technical conference usually necessary
(N/A)
7 days
Well Construction Permit Complete application must be received and permit issued
prior to the installation of a well.
(15 days)
Application copy must be served on each adjacent riparian property 55 days
Dredge and Fill Permit owner. On-site inspection. Pre-application conference usual. Filling
may require Easement to Fill from N.C. Department of (90 days)
Administration and Federal Dredge and Fill Permit.
Permit to construct & operate Air Pollution Abatement 60 days
facilities and/or Emission Sources as per 15A NCAC 21H.06 N/A (90 days)
Any open burning associated with subject proposal
must be in compliance with 15A NCAC 2D.0520.
Demolition or renovations of structures containing
asbestos material must be in compliance with 15A 60 days
NCAC 2D.0525 which requires notification and removal N/A
prior to demolition. Contact Asbestos Control Group
919-733-0820. (90 days)
C mplex Source Permit required under 15A NCAC 2D.0800.
The Sedimentation Pollution Control Act of 1973 must be properly addressed for any land disturbing activity. An erosion & sedimentatio
control plan will be required if one or more acres to be disturbed. Plan filed with proper Regional Office (Land Quality Sect.) at least 30 20 days
days before beginning activity. A fee of $30 for the first acre and $20.00 for each additional acre or art must accompany the plan. 30 days)
The Sedimentation Pollution Control Act of 1973 must be addressed with respect to the referrenced Local Ordinance: (30 days)
On-site inspection usual. Surety bond filed with EHNR. Bond amount
Mining Permit varies with type mine and number of acres of affected land. Any area 30 days
mined greater than one acre must be permited. The appropriate bond (60 days)
must be received before the permit can be issued.
North Carolina Burning permit On-site inspection by N.C. Division Forest Resources if permit 1 day
exceeds 4 days (N/A)
Special Ground Clearance Burning Permit - 22 On-site inspection by N.D. Division Forest Resources required "if more 1 day
counties in coastal N.C. with organic soils than five acres of ground clearing activities are involved. Inspections (N/A)
should be requested at least ten days before actual burn is planned."
90.120 days
Oil Refining Facilities N/A (NIA)
If permit required, application 60 days before begin construction.
Applicant must hire N.C. qualified engineer to: prepare plans. 30 days
Dam Safety Permit inspect construction, certify construction is according to EHNR approv-
ed plans. May also require permit under mosquito control program. And (60 days)
a 404 permit from Corps of Engineers. An inspection of site is neces-
sary to verify Hazard Classification. A minimum fee of $200.00 must ac-
company the application. An additional processing fee based on a
percentage or the total project cost will be required upon completion.
PS 105
Continued on reverse
Normal Process`
Time
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(statutory time
PERMITS SPECIAL APPLICATION PROCEDURES or REQUIREMENTS limit)
File surety bond of $5,000 with EHNR running to State of N.C. 10 days
Permit to drill exploratory oil or gas well conditional that any well opened by drill operator shall, upon (N/A)
abandonment, be plugged according to EHNR rules and regulations.
Geophysical Exploration Permit Application filed with EHNR at least 10 days prior to issue of permit 10 days
Application by letter. No standard application form. (N/A)
State Lakes Construction Permit Application fee based on structure size is charged. Must include 15-20 days
descriptions & drawings of structure & proof of ownership (NIA)
of riparian property.
60 days
401 Water Quality Certification N/A (130 days)
55 days
CAMA Permit for MAJOR development $250.00 fee must accompany application (150 days)
22 days
CAMA Permit for MINOR development $50.00 fee must accompany application (25 days)
Several geodetic monuments are located in or near the project area. If any monuments need to be moved or destroyed, please notify:
N.C. Geodetic Survey, Box 27687, Raleigh, N.C. 27611
Abandonment of any wells, if required, must be in accordance with Title 15A, Subchapter 2C.0100.
Notification of the proper regional office is requested if "orphan" underground storage tanks (USTS) are discovered during any excavation operation.
Compliance with 15A NCAC 2H.1000 (Coastal Stormwater Rules) is required. 45 days
(NIA)
Other comments (attach additional pages as necessary, being certain to cite comment authority):
Iq (p
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REGIONAL OFFICES
Questions regarding these permits should be addressed to the Regional Office marked below.
? Asheville Regional Office ? Fayetteville Regional Office
59 Woodfin Place Suite 714 Wachovia Building
Asheville, NC 28801 Fayetteville, NC 28301
[phone] [phone]
ZMooresville Regional Office ? Raleigh Regional Office
919 North Main Street, P.O. Box 950 3800 Barrett Drive, Suite 101
Mooresville, NC 28115 Raleigh, NC 27609
[phone] [phone]
? Washington Regional Office
1424 Carolina Avenue
Washington, NC 27889
[phone]
? Winston-Salem Regional Office
8025 North Point Blvd.
Suite 100
Winston-Salem, INC 27106
[phone]
? Wilmington Regional Office
127 Cardinal Drive Extension
Wilmington, NC 28405
[phone]
Y
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QUA .
State of North Carolina gCC1/0/V
Department of Environment, Health, and Natural Resources
Division of Land Resources
James G. Martin, Governor PROJECT REVIEW COPmENTS Charles H. Gardner
William W. Cobey, Jr., Secretary Director
Project (dumber: ?rJg County: y p,y`,rrcr
`Q'
Project Name: Lam",
Geodetic Survey
This project will impact 6 geodetic survey markers. N.C. Geodetic
Survey should be contacted prior to construction at P.O. Box 27687,
Raleigh, N.C. 27611 [phone]. Intentional destruction of a
geodetic monument is a violation of N.C. General Statute 102-4.
This project will have no impact on geodetic survey markers.
Other (comments attached)

For more information contact the Geodetic Survey office attr"'(919) J731-38362"
? Revie er Date
Erosion. and Sedimentation Control
` No comment ? This project will require approval of an erosion and sedimentation
control plan prior,:to beginning any land-disturbing activity if more
than one (1) acre will be disturbed.
? If an environmental document is required to satisfy Environmental
Policy Act (SEPA) requirements, the document must be submitted as part
of the erosion and sedimentation control plan.
? If any portion of the project is located within a High Quality Water
Zone (HQW), as classified by the Division of Environmental Management,
increased design standards for sediment and erosion control will apply.
_ The erosion and sedimentation control plan required for this project
should be prepared by the Department of Transportation under the
erosion control program delegation to the Division of Highways from the
North Carolina Sedimentation Control Commission.
Other (comments attached)
For more information contact the Land Quality Section at [phone].
3 -/7-QZ
Reviewer Date
P.O. Box 27687 • Raleigh, N.C. 27611-7687 • Telephone [phone]
An Equal Opportunity Affirmative Action Employer
,tea a STArF a
i
State of North Carolina
Department of Environment, Health, and Natural Resources
Division of Water Resources
512 North Salisbury Street a Raleigh, North Carolina 27611
James G. Martin, Governor
William W. Cobey, Jr., Secretary March 16, 1992
MEMORANDUM
John N. Morris
Director
TO: Ms. Melba McGee, Planning and Assessment
FROM: Jeff Bruton P\?? ?-
SUBJECT: Project No. 92-0458; Four Mile Creek Sanitary Sewer
Outfall and Pump Station
The Division of Water Resources (Division) has reviewed the
Environmental Assessment (EA) prepared for the Four Mile Creek
Sanitary Sewer Outfall And Pump Station, Charlotte-Mecklenburg
Utility Department. In addressing the loss of wetlands, the
Division finds the Mitigative Measures portion of the EA lacking.
The Division recommends that the Charlotte-Mecklenburg Utility
Department do one of the following:
1) Design the interceptor so as to avoid wetland impacts,
2) Design the interceptor so as to minimize wetland impacts
and conform to nationwide permit guidelines.
3) If the current design is preferred, the Charlotte-
Mecklenburg Utility Department should consult with
wildlife agencies and develop an acceptable mitigation
plan for the wetland losses.
r
P.O. Box 27687, Raleigh, North Carolina 27611-7687 Telephone [phone]
An Equal Opportunity Affirmative Action Employer
A
MZEN AND SAWYER
Environmental Engineers & Scientists
February 28, 1992
Mr. W. Boyd DeVane, Supervisor
Program and Development Unit
Water Quality Planning Branch
North Carolina Department of Environment,
Health and Natural Resources
Division of Environmental Management
Post Office Box 27687
Raleigh, North Carolina 27611
Hazen and Sawyer, P. C.
2 Parkway Plaza, Suite 170
4828 Parkway Plaza Blvd.
Charlotte, NC 28217
704 357-3150
Fax: [phone]
Re: Environmental Assessment
Four Mile Creek Sanitary Sewer
Outfall and Pumping Station
Charlotte-Mecklenburg Utility Department
H&S No. 6113 (04)
Dear Mr. DeVane:
In accordance with our conversation this date, I am submitting an additional
twelve (12) copies of the referenced report, along with a copy of the original submittal
letter, for your review, comments and distribution. Our appreciation is extended for
your help in the processing of this document.
Very truly yours,
HAZEN AND SAWYER, P.C.
1A
Ralph L. Waters, P.E.
Associate
RLW/kf
Enclosures
New York, NY - Armonk, NY - Upper Saddle River, NJ - Raleigh, NC - Charlotte, NC - Richmond, VA - Hollywood, FL - Boca Raton, FL - Fort Pierce, FL - Jupiter, FL - Miami, FL - Bogota, D.E. Colombia

CHAR LOTTE-MECKLENBURG UTILITY DEPARTMENT
CHARLOTTE, NORTH CAROLINA
FOUR MILE CREEK
SANITARY SEWER OUTFALL
. AND
PUMP STATION
ENVIRONMENTAL ASSESSMENT
DECEMBER 1991
STATE PROJECT AGENCY: NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT, HEALTH AND NATURAL
RESOURCES
DIVISION OF ENVIRONMENTAL MANAGEMENT
CONTACT: Mr. W. Boyd DeVane, Supervisor
PROGRAM AND DEVELOPMENT UNIT
WATER QUALITY PLANNING BRANCH
919/733-5083
OTHER AGENCIES: CHAR LOTTE-MECKLENBURG UTILITY
DEPARTMENT
ARMY CORPS OF ENGINEERS
PREPARED BY: HAZEN AND SAWYER, P.C.
CHARLOTTE, NORTH CAROLINA
704/357-3150
t. i
Four Mile Creek
Sanitary Sewer Outfall and Pumping Station
Environmental Assessment
1. Proposed Facilities and Actions, Funding Sources
The proposed project includes a parallel gravity outfall, elimination of existing
aerial creek crossings, wastewater pumping station and a force main to the Charlotte-
Mecklenburg Utility Department's (CMUD) existing McAlpine Creek Outfall. The
project will provide wastewater collection for the Four Mile Creek Basin service area of
which approximately eleven percent is located within the City of Matthews, twenty-six
percent located within the City of Charlotte and sixty-three percent in unincorporated
areas of Mecklenburg County. The proposed project service areas are located entirely
within the 20 year growth area of the City of Charlotte and the City of Matthews.
The proposed project consists of approximately 24,500 L.F. of 30"-36" gravity
outfall running along Four Mile Creek, lowering of 7 existing aerial crossings, a 6 MGD
average daily flow pumping station and a 24" force main. The proposed outfall
generally parallels the existing Four Mile Creek Outfall at an elevation below the flow
line of Four Mile Creek. Project limits are between the confluence of Four Mile Creek
and McAlpine Creek and Providence Road. Wastewater will be transported to the
proposed pumping station via the proposed outfall and discharged through
approximately 600 L.F. of 24" force main to the existing 54" McAlpine Outfall where it
will be conveyed to the existing McAlpine Wastewater Treatment Plant for treatment.
The proposed project will eliminate overflows at manholes on the existing Four Mile
Creek Outfall during high flow periods as well as provide for future wastewater flows
from currently undeveloped land in the Four Mile Creek Basin. The project will be
constructed in one phase. A map showing the proposed project is presented in
Figure 1.
The cost of the project is estimated to be approximately six million dollars and
will be obtained from City of Charlotte funds.
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2. Existing Environment
2.1 Topography and Soils
The City of Charlotte is located in the southern portion of Mecklenburg County
which lies entirely within the southern physiographic region. It is characterized by
broad, gently rolling interstream areas and by steeper slopes along the drainage ways.
Differences in elevation range from 50 to 100 feet from the highest to the lowest
points. Elevations in the County range from 540 feet above sea level in Pineville to a
high point of 830 feet in Cornelius.
Mecklenburg County is composed of soils from eight soil associations: Cecil,
Cecil-Urban Land, Iredell-Mecklenburg, Wilkes-Enon, Enon-Helena-Vance, Pacolet-
Cecil, Monacan and Georgeville-Goldston-Lignum. A soil association consists of a
landscape having a distinctive proportional pattern of soils. Soils in the Four Mile
Creek Basin are located within the Cecil, Iredell-Mecklenburg and Wilkes-Enon soil
associations. These three soil associations consist of gently sloping to steep with
moderately well drained to well drained soils. All three classifications have a
predominately clayey subsoil. The Cecil was formed in residuum from acid igneous
and metamorphic rock; the Iredell-Mecklenburg from diorite, gabbro, and other rock
high in ferromagnesian minerals; and the Wilkes-Enon from diorite, hornblende schist,
and other basic rock, or from mixed acidic and basic rock.
The project is located in the floodway and floodway fringe of Four Mile Creek in
Southern Mecklenburg County. The area's predominate soil Type II Monacan, a
nearly level, somewhat poorly drained soil formed by recent alluvium deposits on the
floodplain. The surface layer is brownish loam, fine sandy loam or sandy loam. The
subsoil is reddish loam in the upper part and brownish or grayish silty clay loam, fine
sandy loam, sandy clay loam, and sandy clay in the lower part. This soil classification
is further characterized by low organic matter in the surface layer, moderate
permeability, low shrink-swell potential and slow surface runoff. The available water
capacity is high. The soil is strongly acid to neutral. Depth to bedrock is typically
more than 60 inches. Fill has been added in some areas.
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F3
The seasonal water table is .5 to 2 feet in winter and spring. Some areas
adjacent to the pipeline route are inundated with standing water apparently held in
place by logs and debris resulting from Hurricane Hugo which have blocked the flow of
Four Mile Creek in several places.
Approximately 2.24 acres of wetlands (based upon a 50' wide construction
easement) are expected to be involved in the project. This acreage includes wetlands
along the outfall as well as along the force main from the pumping station as it
crosses McAlpine Creek to tie to the existing 54" McAlpine Creek Outfall.
2.2 Surface Waters
In general, the land in the County slopes in a southwesterly direction, the
general flow for the major streams, which include the Catawba River and its
tributaries: McDowells Creek, Long Creek, Paw Creek, Sugar Creek and McApline
Creek. The Catawba River drains approximately 75% of the County while the
remaining 25% is drained by the North and South Forks of Crooked Creek which are
tributaries of the Pee Dee River.
2.3 Groundwater
The vast majority of water supply in Mecklenburg County is obtained from
surface water sources which is treated and distributed by the Charlotte-Mecklenburg
Utility Department. However, groundwater is utilized to supply some subdivisions,
mobile home parks, commercial establishments and industries. Groundwater is
reported to be of good-to-excellent quality throughout most of the County.
2.4 Land Use
Existing land use in the project area is primarily residential, light commercial,
recreational and agricultural. Thirteen (13) major subdivisions and two golf courses
(Raintree and Piper Glen) are located within the project area.
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3. Existing Wastewater Facilities
Existing wastewater facilities include the existing Four Mile Creek Outfall, minor
collectors, and the McAlpine Wastewater Treatment Plant which is located
approximately one mile south of the project area and which discharges to McAlpine
Creek, a tributary of the Catawba River.
4. Need for the Proposed Facilities and Actions
The existing Four Mile Creek Outfall is undersized to serve the Four Mile Creek
Drainage Basin which is located within the 20 year growth areas of the Cities of
Charlotte and Matthews. Currently, during times of peak flows, the existing outfall
overflows raw sewage creating health hazards and adverse environmental conditions.
Additionally, the existing outfall is located on the north side of Four Mile Creek at an
elevation which necessitates aerial crossings to serve current development on the
south side of the creek. These aerial crossings impose a substantial threat to the
environment should they, at anytime, break. The proposed project will eliminate these
aerial crossings in addition to rectifying the overflow situation during times of peak
flows.
Proposed facilities are sized based on full development in the Four Mile Creek
Basin in accordance with current land use plans and Charlotte-Mecklenburg Utility
Department standard design flows. Peak flows are based on a factor of 2.5 times
average flow. Average daily flow from the total service area is projected to be
approximately 6.0 MGD.
5. Alternative Analysis
An extensive alternative analysis of route selection and pumping station location
was performed for the proposed project and is described in a document prepared for
CMUD by Hazen and Sawyer, P.C. entitled "Concept Report and Route Selection,
Four Mile Creek Parallel Outfall, September, 1991."
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In addition to a "no-action" alternative, five alternative routes were studied for
the proposed outfall as well as consideration given to replacing the existing outfall in
its current location. Likewise, since a pumping station is required to service any outfall
alternative which is placed at an elevation below the flow line of Four Mile Creek, an
alternative analysis was similarly performed for four different pumping station sites.
The alternative analysis for route selection included seven alternatives as
follows:
• No action.
• Replace existing outfall in current location.
• Parallel existing outfall.
• High North Side - generally parallels existing outfall on the north.
side of Four Mile Creek at a lower elevation than the existing
outfall but at an elevation above that of the flow line of Four Mile
Creek.
• High South Side - an outfall routed on the south side of Four Mile
Creek but placed at an elevation above that of the flow line at
Four Mile Creek.
• Low North - an alternative placing the proposed outfall on the
north side of Four Mile Creek at an elevation below that of the
flow line of the creek.
• Low South - an alternative placing the proposed outfall on the
south side of Four Mile Creek at an elevation below that of the
flow line of the creek.
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The above alternatives are illustrated on Figures C1 through C8 entitled
"Design Concept and Route Selection". The eight figures show the total route from
Providence Road (Figure C8) to McAlpine Creek (Figure 1).
The alternatives were screened utilizing 10 basic comparison factors. Table 1,
"Outfall Screening Matrix-Alternative Routing-Four Mile Creek Outfall", depicts the
results of the screening process for the five feasible alternatives.
Results of the screening process for each alternative are presented as follows:
• No-Action - Rejected - Without the project, discharge of raw
sewage through surcharged manholes would continue and
increase as the existing outfall deteriorates with age and additional
demand is placed on the system.
• Replace Existing Outfall in Current Location - Reiected - Existing
outfall is built within several subdivisions and passes between
homes with as little as 20-feet separation. Construction would
have severe negative impact on existing structures. Likewise, this
alternative, due to its placement at a relatively high elevation,
would not serve many areas of the drainage basin by gravity.
• Parallel Existing Outfall - Reiected - Same reasons as replacing
existing outfall in-place.
• High North Side of Four Mile Creek - Reiected - This route,
although generally lower in elevation than the existing outfall,
created substantial adverse impact on existing homes and
property. Likewise, it would not allow serving the entire drainage
basin by gravity.
• High South Side of Four Mile Creek - Reiected - Same reasons as
those for rejecting High North Route.
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• High South/Low South/Low North Routes - Selected Alternative -
This route is a combination of three alternatives and located within
the 100 year flood limits of the Four Mile Creek basin with
approximately 15,900 L.F. being placed on the north side of Four
Mile Creek and 8,600 L.F. being placed on the south side of the
creek. The route has virtually no impact on existing structures
and infrastructure. Its impact on wetlands is minimal (less than 2
acres) and it allows the removal of existing aerial creek crossings.
Construction activities will also have minimal adverse
environmental impact (noise, air pollution, etc.).
The selected alternative, as described above, is as illustrated in Figures C1
through C8, and was developed after preliminary field surveys were accomplished.
The final selected route offers minimal adverse impact on wetlands, homes and golf
courses.
The alternative analysis for the pumping station considered four alternate sites.
These sites are illustrated on Figure C1. Six factors were utilized in comparing these
alternative sites. Table 2, "Pumping Station Location With Selected Outfall -
Screening Matrix - Four Mile Creek Parallel Outfall", depicts the results of the
screening process. Pumping Station Site B was recommended as a result of the
screening process. Likewise, its location does not impact wetlands or the 100-year
flood event. Additionally, proposed design will minimize noise and odor impacts. The
force main from the pumping station will temporarily impact approximately 0.34 acres
of wetlands as it crosses McAlpine Creek to tie to the existing 54" McAlpine Creek
Outfall.
6. Environmental Consequences, Mitiqation Measures
The environmental impacts of the proposed project and measures to mitigate
those impacts were evaluated for different categories of impacts as discussed in the
following sections.
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t •
TABLE 2
PUMPING STATION LOCATION WITH SELECTED OUTFALL
SCREENING MATRIX
FOUR MILE CREEK PARALLEL OUTFALL
ALTERNATIVE PUMPING STATION LOCATIONS
Weighting Comparison
Factor Factors A B C D

8 Cost 1 (8)* 3 (24)* 2 (16)* 4 (32)*
8 Impact on Homes 4 (32) 1 (8) 3 (24) 1 (8)
6 Access 2 (12) 4 (24) 1 (6) 3 (18)
7 Public Concern 4 (28) 1 (7) 3 (21) 2 (14)
6 Environmental Impact 1 (6) 1 (6) 1 (6) 1 (6)
5 Site Acquisition 4 (20) 1 (5) 3 (15) 2 (10)
TOTALS 106 74+ 88 88
RANKING 3 1 2 2
*Weighting factor times ranking.
+Site location with lowest point total is recommended alternative.
6.1 Changes in Land Use
Changes in land use are required for construction of the proposed facilities,
including the outfall, pumping station, force main and lowering of existing aerial
crossings. The pump station site will be cleared and graded to allow its construction.
A construction easement of 55 feet and a permanent easement of 30 feet will be
provided for the gravity outfall. Existing easements will be utilized for lowering existing
aerial crossings below grade. The force main will have a permanent easement of 20
feet through approximately 300 feet of wetlands as it crosses McAlpine Creek.
6.2 Wetlands
No wetlands are located on the site of the proposed pumping station. Based
on National Wetlands Inventory maps prepared by the U.S. Fish and Wildlife Service,
and confirmed by a field survey by the Army Corps of Engineers, approximately 2.24
acres of wetlands will be disturbed on a short-term basis by the proposed outfall and
force main construction. Disturbance will be minimized by carefully controlled
construction techniques. The areas will be restored to existing grade after
construction and should return to their natural state within a relatively short time
period. Measures to mitigate impacts on wetlands from proposed sewer line
construction are discussed hereafter.
6.3 Prime or Unique Agricultural Lands
The proposed project (with the exception of the pumping station) is located
within the 100-year flood limits of Four Mile Creek, in areas that are, for the most part,
set aside for greenways. Therefore, there will be no significant or adverse effect on
prime or unique agricultural lands. Access to the pumping station will be along
planned, but unplatted, subdivision streets.
Agricultural land within the service area of the proposed outfall will gradually be
converted to urban uses as an indirect result of the project. However, these areas
-s-

have been identified for urban development in current land use plans and zoning
ordinances.
6.4 Public Lands, Scenic and Recreational Areas
Some land within the project area has been designated as part of a local
greenway; the location of the outfall will not affect this use. In fact, the project will
improve these areas by eliminating sewage overflows.
The outfall will cross some of the common recreational areas of the adjoining
subdivisions which generally consist of poorly maintained jogging paths in floodway
and wetland areas. These areas will be returned to existing conditions and operation
of the outfall will not adversely impact use of the area.
The outfall also crosses two private golf courses, Raintree and Piper Glen. The
outfall location has been reviewed with input from the course officials to minimize
disruption during construction. All land disturbed by the project will be returned to
existing condition.
6.5 Areas of Archaeological or Historic Value
No areas of archaeological or historic value within the project area are listed in
the National Register of Historic Places, Catalog of National Historic Landmarks or
Historic Properties in Charlotte-Mecklenburg (see references).
6.6 Air Quality and Noise Levels
The proposed project will have no significant long-term impact on air quality or
noise levels. Construction activities associated with the proposed project will result in
unavoidable noise and air pollution impacts, including particulates and other
contaminants from earthwork operations, clearing and construction equipment
emissions. These impacts should be localized and short-term during construction and
can be minimized by limiting Construction to normal daytime working hours, by
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A a s
watering to control dust, by proper maintenance of construction equipment, and by use
of timber harvesting and chipping of brush and tree branches. Submersible pumps
will be utilized to minimize long-term pump station noise during operation. Odor
control facilities will be incorporated into the pumping station design if deemed
necessary.
6.7 Groundwater Quality
Groundwater quality will be either unaffected or improved by the sewer line
construction. The outfall will be constructed to meet or exceed all exfiltration
standards and will take the load off the existing outfall which is now subject to
surcharge and overflow of raw sewage.
6.8 Water Supplies and Surface Water Quality
The proposed project will not impact water supplies or surface water quality
except for minor short-term impacts from erosion and sedimentation during
construction. Short-term impacts on surface waters will be minimized by maintenance
of effective erosion and sedimentation control procedures pursuant to the
requirements of the North Carolina Sedimentation Pollution Control Act.
Increased surface runoff and soil erosion will result from additional urban
development of the service area and from construction activity associated with this
development. This will be mitigated by strict enforcement of existing City and County
regulations for design and maintenance of storm drainage systems, floodplain
management, and soil and erosion control.
6.9 Shellfish, Fish, and Wildlife and Their Habitats
Impacts to shellfish, fish, and wildlife would be short-term relative to clearing of
easement where required. A width of 55 feet would be cleared for new easement,
with a permanent easement width of 30 feet. Short-term impacts would also occur at
stream crossings. Erosion and sedimentation control measures will be applied to

i ,I
minimize adverse impacts. No threatened or endangered species are expected to be
adversely affected by the proposed project.
The impact on fish habitat will be beneficial for Four Mile Creek because of the
elimination of overflows from manholes during peak flow conditions. Any negative
impacts from urban development can be mitigated by effective management of
stormwater in areas to be developed. The impact of siltation occurring from
construction activities will be minimized by effective soil and erosion control measures.
6.10 Introduction of Toxic Substances
No toxic substances are expected to be introduced into the environment as a
result of the proposed project.
6.11 Eutrophication of Receiving Waters.
The proposed project will not involve any discharge to surface waters;
therefore, it will have no effect on eutrophication of receiving waters.
7. Mitigative Measures
Mitigative measures to minimize adverse effects on the environment for the
proposed project are summarized as follows:
7.1 During Construction Activity
• Removal of natural vegetation along easements will be minimized
by using already cleared areas where possible. New easements
will have a maximum cleared width of 55 feet, with a permanent
easement width of 30 feet.
• Soil erosion and sediment will be limited by design and
enforcement of effective erosion and sediment control measures.
- 11 -
• . . r
• Construction noise, vehicle emissions and dust will be minimized
by limiting construction to normal daytime working hours, by
proper maintenance of construction equipment, and by watering to
control dust.
7.2 Long-term Effects
• No significant long-term adverse effects are expected for the
proposed project.
• Long-term impacts on wetlands for outfall and force main
construction will be mitigated by restoration of disturbed areas to
original grade.
Regulations and permits to be adhered to during construction include:
• Mecklenburg County sedimentation and erosion control
regulations,
• 404 permit requirements related to for dredging and filling in
wetlands,
• Mecklenburg County Floodway regulations, and,
• Mecklenburg County air quality regulations.
-12-
a ? ?
t
REFERENCES
Catalog of National Historic Landmarks, National Park Service, History Division, 1987.
Charlotte-Mecklenburg Generalized Land Plan, 2005, November, 1985.
Concept Report and Route Selection, Four Mile Creek Parallel Outfall, Hazen and
Sawyer, September, 1991.
Corps of Engineers, Wetlands Delineation Manual, Technical Report V-87-1, January,
1987.
Exploring Old Mecklenburg, Stenhouse, Charlotte, 1952.
Historic Properties in Charlotte-Mecklenburg, Charlotte-Mecklenburg Historic Properties
Commission, 1988, pp. 103-196.
Hydric Soils of the United States, Soil Conservation Service, Miscellaneous Publication
Number 1491.
Mecklenburg County Floodway Regulations, Latest Revision, Mecklenburg County.
Mecklenburg County Soil Erosion and Sediment Control Ordinance, Latest Revision.
Mecklenburg County Zoning Ordinance, January 1992.
National List of Plant Species that Occur in Wetlands, National Ecology Research Center,
May, 1988, PB89-128698.
National Register of Historic Places, U.S. Department of the Interior, National Park
Service, Washington, D.C., 1969, pp. 221-222.
Soil Survey of Mecklenburg County, North Carolina, U.S. Dept. of Agriculture, Soil
Conservation Service.

STAIZ
A
State of North Carolina
Department of Environment, Health, and Natural Resources
Division of Environmental Management
512 North Salisbury Street • Raleigh, North Carolina 27604
James G. Martin, Governor A. Preston Howard, Jr., P.E.
William, W. Cobey, Jr., Secretary September 15, 1992 Acting Director
MEMORANDUM
TO: Dennis L. Stewart, Wildlife Resources Commission
Donald Robbins, Division of Forest Resources
John Sutherland, , Division of Water Resources
FROM: Monica Swihare,"Water Quality Planning
SUBJECT: Four Mile Creek Sewer Outfall and Pump Station,
Environmental Assessment, Mecklenburg County, Project
#458
Boyd Devane asked me to forward the attached response to
comments on the subject environmental assessment. Please let me
know if the applicant has adequately addressed your concerns. You
can reach me at 733-5083. Thanks for your consideration of this
matter.
458ea.ltr
Attachment
cc: John Dorney w/attachment
REGIONAL OFFICES
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704/251-6208 919/486-1541 704/663-1699 919/571-4700 919/946-6481 919/395-3900 919/896-7007
Pollution Prevention Pays
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone]
An Equal Opportunity Affirmative Action Employer
s
HAZEN AND SAWYER
Environmental Engineers & Scientists
September 8, 1992
State of North Carolina
Department of Environment, Health and Natural Resources
Division of Environmental Management
512 North Salisbury Street
Raleigh, North Carolina 27611
Attention: Mr. Boyd DeVane
Re: #458 Four Mile Creek Sewer Outfall and
Pump Station, Environmental Assessment,
Mecklenburg County
H&S No. 6113 (04/EA)
Dear Mr. DeVane:
Hazen and Sawyer, P C.
2 Parkway Plaza, Suite 170
4828 Parkway Plaza Blvd.
Charlotte, NC 28217
704 357-3150
Fax: [phone]
This letter is in response to your fax transmittal (July 9, 1992) to Donald Cordell
of our Raleigh office of comments from various State agencies regarding the
referenced project. The purpose of this letter is to define those changes in the
environmental assessment that we will make in response.to the comments. If your
determination that our response is adequate, we will then incorporate these changes
into the environmental assessment and resubmit it for your final review.
Response to Comments (numbered in order of agencies' comments)
North Carolina Wildlife Resource Commission
1. Page -8, Paragraph 6.1 (Changes in Land Use) will be revised to reflect a
permanent easement of 25 feet with the construction easement varying from
40-55 feet. Easements in wetlands will be restricted to 40 feet in accordance
with the Nationwide Permit for Utility Construction. These easement widths are
in accordance with CMUD standards, with construction easements varying due
to the depth of cut for installation of the outfall.
2. Our response to NCWRC comment relative to rare or endangered species of
salamanders is as follows:
"Impacts to shellfish, fish, and wildlife would be short-term relative to
clearing the easement and laying the proposed outfall line. The permanent
easement of 25 feet would be cleared completely with an additional 15 to 30
foot construction easement cleared as necessary. Both the permanent and
construction easement widths are in accordance with CMUD standards with the
New York, NY - Armonk, NY • Upper Saddle River, NJ - Raleigh, NC - Charlotte, NC - Richmond, VA - Hollywood, FL - Boca Raton, FL - Fort Pierce, FL - Jupiter, FL - Miami, FL - Bogota, D.E. Colombia
HAZENAND SAWYER
Mr. Boyd DeVane
September 8, 1992
Page 2
construction easement varying due to different trench depths required for
construction of the outfall. Easements through wetlands will be held to a
maximum of 40 feet in accordance with Section 12 of the Nationwide Permit for
Utility Lines. All work will be governed and conducted in accordance with that
permit. Short-term impacts related to construction of the proposed outfall may
also be expected at stream crossings. Erosion and sedimentation control
measures will be applied to minimize adverse impacts due to construction.
No threatened or endangered species are expected to be permanently,
adversely affected by the proposed project. Although short-term and local
migration of some species (not necessarily threatened or endangered) may
occur, the overall affect of the project will be positive as overflows of raw
sewage into the Four Mile Creek during times of heavy rainfall will be
eliminated."
Although the North Carolina Wildlife Resources Commission has
indicated they have reason to believe that several species of rare, threatened,
and/or endangered salamanders could potentially inhabit creek drainages within
Mecklenburg County, no specific documentation of these species in the Four
Mile Creek Basin has been presented. Based on this lack of documentation,
we do not feel a field reconnaissance of the area is warranted.
3. Enclosed are maps which will be incorporated into the environmental
assessment depicting the wetland areas (as defined by the COE) through which
the outfall will pass.
4. A discussion of mitigative measures is presented on page 11 and 12 of the
original submittal. It is our opinion that measures beyond those presented are
not required under the Nationwide Permit for Utility Construction.
Division of Forest Resources
The following paragraph will be inserted in the document which addresses issues
raised by this agency.
Impact on Woodlands
The majority of woodlands affected by the project consist of various types of
hardwoods including'sycamore, maple, pine oak, sweet gum, poplar, and other
broad leaf deciduous varieties. All trees within the 25 foot permanent easement
will be removed. However, a substantial percentage of these trees are already
dead or dying due to backwater caused by log-jams created by Hurricane
Hugo. This cleared area represents approximately 14 acres in area. It may be
HAZEN AND SAWYER
Mr. Boyd DeVane
September 8, 1992
Page 3
necessary to remove some (but not all) trees within an additional area known
as the construction easement. Such removal will be minimized and performed
only where necessary. The total additional area defined by the construction
easement is approximately 13 acres of which only 20% to 25% thereof will be
affected by construction. The contract documents (specifications) will address
disposal of merchantable trees and will likewise set forth "reasonable care" and
protection provisions for timber outside the construction area.
Division of Water Resources
1. In order to serve the entire basin, it is necessary to place the outfall as close as
possible to the creek. While every effort was made to avoid wetlands, it was
not possible to completely circumvent them.
2. An extensive "Alternative Analysis" was performed which is summarized in the
original environmental assessment. Approximately 2.24 acres of wetlands are
impacted over a distance in excess of 5 miles. It was, as is illustrated by the
last sentence, the objective to minimize wetland impacts and conform to the
Nationwide Permit guidelines.
3. In that the construction area will be returned to its original grade (in accordance
with the Nationwide Permit requirements), there should be no permanent
wetland losses to mitigate. Again, mitigative measures to be taken during, and
after, construction are set forth on Pages 11 and 12 of the original document.
Summarizing, all construction will be accomplished under the guidelines of the
Nationwide Permit for Utility Construction.
We appreciate your assistance in finalizing the referenced environmental
assessment.
Very truly yours,
HAZEN AND SAWYER, P.C.
Ralph L. Waters, P.E.
Associate
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LOCATION MAP
CHARLOTTE MECKLENBURG UTILITY DEPARTMENT
PROPOSED SANITARY SEWER OUTFALL
FOUR MILE CREEK - MECKLENBURG COUNTY - NORTH CAROLINA
NOVEMBER 1991 SHEET 1
c. ?
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STATION SITE ?l /
100 YEAR FLOOD
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SCALE: 1" = 200'
WETLAND AREAS - PLAN
CHARLOTTE MECKLENBURG UTILITY DEPARTMENT
PROPOSED SANITARY SEWER OUTFALL
FOUR MILE CREEK - MECKLENBURG COUNTY - NORTH CAROLINA
NOVEMBER 1991 SHEET 2
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x / x 531.5
T/ .x NORTH X
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x x 533. AREA 5 X x 5? i? ` EXISTING
5314 530.6 570.9 • 530.6 sXZ.I 1.103 ACRES AERIAL PIPE 533.1
a?-INCH OUTFlU? S33J _ L
FOUR MILE CREEK r 3' 532.6 X
53},9
570.3 ROBERT .y
x MARCELLA f
-- - WHITESIDE - - -- -- - --- - ' C _ _ PROPOSED 502'. r
` MANHOLE
2Z3 ZYI-10 X
537.7 y . ,\
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x 2005 WHITE OAK
X
PROPOSED
530,6 31.7 I? x HOMEOWNERS v>
7p:"? I I ASSOCIATION MANHOLE
x PROPOSED.
531.1 MANHOLE 100 YEAR FLOOD 45.2 x x
531.5
_ WETLAND l? 546.7 X
AREA 4 546.6 a10Gtu0 Hs-16 5x3.2 AREA
WETLAND .230 ACRES / 547. x Y. 546.43 1 x,
AREA 3 547.0 x $50
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A o-
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TENTATIVE PENDING c3
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HYDRAUL:::IC,S ? - •n/ \ ? ?N ? ? ,
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+
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x 5 6.3 • - SCALE: V = 200'
. ? _ I .... 56 T.T
WETLAND AREAS - PLAN
CHARLOTTE MECKLENBURG UTILITY DEPARTMENT
PROPOSED SANITARY SEWER OUTFALL
FOUR MILE CREEK - MECKLENBURG COUNTY - NORTH CAROLINA
NOVEMBER 1991 SHEET 3