20110745 Ver 1_401 Application_20110811

201 1 p745
UNITED STATES MARINE CORPS
MARINE CORPS BASE
PSC BOX 20004
CAMP LEJEUNE, NC 28542-0004
IN REPLY REFER TO
5090.11.2
BEMD
AUG 0 4 2011
Mr. Ian McMillan
North Carolina Department of Environment
Division of Water Quality, 401 Section
2321 Crabtree Blvd
Raleigh, NC 27604
Dear Mr. McMillan:
and Natural Resources
Al"IFillED
Enclosed is our application for a Department of the Army
Permit for the Main Battle tank Railhead Connector on Marine
Corps Base, Camp Lejeune. The enclosure is submitted for your
review, approval and issuance of a Section 401 Water Quality
Certification for construction of the project. A $570.00
processing fee for this application is also included.
Camp Lejeune proposes to fill permanently fill 0.932 acres
and temporarily impact 0.39 acres of Section 404 wetlands to
complete the project described in the application. Unavoidable
wetland impacts will be compensated with mitigation credits
purchased from the NCEEP and debited from the Greater Sandy Run
Area Wetland Mitigation Bank located on the installation.
The point of contact for this project is Mr. Martin Korenek,
Environmental Conservation Branch, Environment and Installations
Department, at telephone [phone] or email
[e-mail].
wU2R ?.I ?V??? Sincerely,
D D
/Z 1;4?wu?
AUG 1 5 2011
A
OHN R. TOWNSON
?ENR-SATER?UA Director, Environmental Management
1'ID STORMMIATER BRANCH
By direction of the
Commanding Officer
Enclosure: 1. Pre-Construction Notification Form (5 copies w/
fee) for the Main Battle tank Railhead Connector
Copy to:
NCDENR, DCM
NCDENR, DWQ, 401 Section, Attn: J. Steenhuis
I
2 0 1 1 0 7 4 5
ory?W A
O T
Office Use Only:
Corps action ID no.
DWQ project no.
Form Version 1.3 Dec 10 2008
Pre-Construction Notification (PCN) Form
A. Applicant Information
1. Processing
1a. Type(s) of approval sought from the
Corps:
®Section 404 Permit El Section 10 Permit
1 b. Specify Nationwide Permit (NWP) number: N/A or General Permit (GP) number: N/A
1c. Has the NWP or GP number been verified by the Corps? ? Yes ? No
1 d. Type(s) of approval sought from the DWQ (check all that apply):
® 401 Water Quality Certification - Regular ? Non-404 Jurisdictional General Permit
? 401 Water Quality Certification - Express ? Riparian Buffer Authorization
1 e. Is this notification solely for the record
because written approval is not required? For the record only for DWQ 401
Certification:
? Yes ® No For the record only for Corps Permit:

? Yes ® No
1f. Is payment into a mitigation bank or in-lieu fee program proposed for mitigation
of impacts? If so, attach the acceptance letter from mitigation bank or in-lieu
fee program. ® Yes ? No
1 g. Is the project located in any of NC's twenty coastal counties. If yes, answer 1 h
below. ® Yes ? No
1h. Is the project located within a NC DCM Area of Environmental Concern (AEC)? ? Yes ® No
2. Project Information
2a. Name of project: Cogdels Creek Main Battle Tank Connector Road
2b. County: Onslow
2c. Nearest municipality / town: Jacksonville
2d. Subdivision name: N/A
2
auzr= r%
2e. NCDOT only, T.I.P. or state
project no: N/A Ltn
___r . _ D
3. Owner Information ??11
3a. Name(s) on Recorded Deed: USMC - Camp Lejeune MR - iN r ..
3b. Deed Book and Page No. N/A MWUMAND ?•t?•rF4; ;;:;.; ??y
3c. Responsible Party (for LLC if
applicable): N/A
3d. Street address: N/A
3e. City, state, zip: N/A
3f. Telephone no.: N/A
3g. Fax no.: N/A
3h. Email address: N/A
Page 1 of 10
PCN Form - Version 1.3 December 10, 2008 Version
4. Applicant Information (if different from owner)
4a. Applicant is: ? Agent ® Other, specify: Director of Public Works
4b. Name: Mr. Carl Baker
4c. Business name
(if applicable): Deputy Public Works Officer (USMC)
4d. Street address: 105 Michael Road
4e. City, state, zip: Camp Lejeune, NC 28542
4f. Telephone no.: 910.451.2213
4g. Fax no.: 910.451.2927
4h. Email address: [e-mail]
5. Agent/Consultant Information (if applicable)
5a. Name: Ron Johnson
5b. Business name
(if applicable): AECOM
5c. Street address: 701 Corporate Center Drive, Suite 475
5d. City, state, zip: Raleigh, NC 27607
5e. Telephone no.: 919-854-6210
5f. Fax no.: 919-854-6259
5g. Email address: [e-mail]
Page 2 of 10
PCN Form - Version 1.3 December 10, 2008 Version
B. Project Information and Prior Project History
1. Property Identification
1a. Property identification no. (tax PIN or parcel ID): N/A
1 b. Site coordinates (in decimal degrees): Latitude: 34.659 Longitude: - 77.329
(DD.DDDDDD) (-DD.DDDDDD)
1 c. Property size: N/A acres
2. Surface Waters
2a. Name of nearest body of water (stream, river, etc.) to Cogdels Creek

proposed project: ,
2b. Water Quality Classification of nearest receiving water: SC, NSW
2c. River basin: White Oak River Basin
3. Project Description
3a. Describe the existing conditions on the site and the general land use in the vicinity of the project at the time of this
application:
The project is located on US Marine Corps Base Camp Lejeune. Land use is for military training, roadways, and utility
right-of-ways. Much of the adjacent land is undeveloped forested areas.
3b. List the total estimated acreage of all existing wetlands on the property:
126 acres in Gogdels Creek area
3c. List the total estimated linear feet of all existing streams (intermittent and perennial) on the property:
12,107 feet in Cognels Creek area
3d. Explain the purpose of the proposed project:
See attched project descriptions in Additional Information at the end of this PCN Form.
3e. Describe the overall project in detail, including the type of equipment to be used:
Additional information can be found at the end of this PCN Form.
4. Jurisdictional Determinations
4a. Have jurisdictional wetland or stream determinations by the
Corps or State been requested or obtained for this property /
®Yes ? No ? Unknown
project (including all prior phases) in the past?
Comments: See Additional Information at end of Form.
4b. If the Corps made the jurisdictional determination, what type
®Preliminary ? Final
of determination was made?
4c. If yes, who delineated the jurisdictional areas? Agency/Consultant Company: Tetra Tech
Name (if known): Other:
4d. If yes, list the dates of the Corps jurisdictional determinations or State determinations and attach documentation.
See Additional Information attached to the end of this Form.
5. Project History
5a. Have permits or certifications been requested or obtained for ? Yes ® No ? Unknown
this project (including all prior phases) in the past?
5b. If yes, explain in detail according to "help file" instructions.
N/A
6. Future Project Plans
6a. Is this a phased project? ? Yes ® No
6b. If yes, explain.
See Additional Information at the end of this Form
Page 3 of 10
PCN Form - Version 1.3 December 10, 2008 Version
C. Proposed Impacts Inventory
1. Impacts Summary
1 a. Which sections were completed below for your project (check all that apply):
® Wetlands ? Streams - tributaries ? Buffers
? Open Waters ? Pond Construction
2. Wetland Impacts
If there are wetland impacts proposed on the site, then complete this question for each wetland area impacted.
2a. 2b. 2c. 2d. 2e. 2f.
Wetland impact Type of jurisdiction
number - Type of impact Type of wetland Forested (Corps - 404, 10 Area of impact
Permanent (P) or (if known) DWQ - non-404, other) (acres)
Temporary T
W1 ? P ®T Hand Clearing PF01 ® Yes
? No ® Corps
? DWQ 0.01
W2 ®P ®T Fill/Hand Clearing PF01 ® Yes
? No ® Corps
? DWQ P-0.0011T-0.05
W3 ®P ®T Fill/Hand Clearing PFO1/EM ® Yes
? No ® Corps
? DWQ P-0.53/T-0.14
W4 ®P ®T Fill/Hand Clearing PF01 ® Yes
? No ® Corps
? DWQ P-0.26/T-0.12
W5 ®P ®T Fill/Hand Clearing PF01 ® Yes
? No ® Corps
? DWQ P-0.14/T-0.06
W6 ®P ®T Fill/Hand Clearing PF01 ® Yes
? No ® Corps
? DWQ P-0.001/T-0.01
2g. Total wetland impacts P-0.932/T-0.39
2h. Comments: 0.932 acres of permanent impacts and 0.39 acres of temporary impacts from hand clearing
3. Stream Impacts
If there are perennial or intermittent stream impacts (including temporary impacts) proposed on the site, then complete this
question for all stream sites impacted.
3a. 3b. 3c. 3d. 3e. 3f. 3g.
Stream impact Type of impact Stream name Perennial Type of jurisdiction Average Impact
number - (PER) or (Corps - 404, 10 stream length
Permanent (P) or intermittent DWQ - non-404, width (linear
Temporary (T) (INT)? other) (feet) feet)
S1 ? P ? T ? PER ? Corps
? INT ? DWQ
S2 ? P ? T ? PER ? Corps
? INT ? DWQ
S3 ? P ? T ? PER ? Corps
? INT ? DWQ
S4 ? P ? T ? PER ? Corps
? INT ? DWQ
S5 ? P ? T ? PER ? Corps
? INT ? DWQ
S6 ? P ? T ? PER ? Corps
? INT ? DWQ
3h. Total stream and tributary impacts p
3i. Comments: No streams are impacted by the proposed project. There is not a channel associated with the wetland areas
Page 4 of 10
PCN Form - Version 1.3 December 10, 2008 Version
4. Open Water Impacts
If there are proposed impacts to lakes, ponds, estuaries, tributaries, sounds, the Atlantic Ocean, or any other open water of
the U.S. then individually list all open water impacts below.
4a. 4b. 4c. 4d. 4e.
Open water Name of waterbody
impact number - (if applicable) Type of impact Waterbody type Area of impact (acres)
Permanent (P) or
Temporary T
01 ?P?T
02 ?P?T
03 ?P?T
04 ?P?T
4f. Total open water impacts
4g. Comments: There are no open water impacts associated with this project
5. Pond or Lake Construction
If and or lake construction proposed, then complete the chart below.
5a. 5b. 5c. 5d. 5e.
Wetland Impacts (acres) Stream Impacts (feet) Upland
Pond ID Proposed use or purpose (acres)
number of pond
Flooded Filled Excavated Flooded Filled Excavated Flooded
P1
P2
5f. Total
5g. Comments: N/A
5h. Is a dam high hazard permit required?
? Yes ? No If yes, permit ID no:
5i. Expected pond surface area (acres): N/A
5j. Size of pond watershed (acres): N/A
5k. Method of construction: N/A
6. Buffer Impacts (for DWQ)
If project will impact a protected riparian buffer, then complete the chart below. If yes, then individually list all buffer impacts
below. If an impacts require mitigation, then you MUST fill out Section D of this form.
6a.
? Neuse ? Tar-Pamlico ? Other:
Project is in which protected basin? ? Catawba ? Randleman
6b. 6c. 6d. 6e. 6f. 6g.
Buffer impact
number - Reason Buffer Zone 1 impact Zone 2 impact
Permanent (P) or for Stream name mitigation (square feet) (square feet)
Temporary T impact required?
61 ?P?T ?Yes
? No
B2 ?P?T ?Yes
? No
B3 ?P?T ?Yes
? No
6h. Total buffer impacts
6i. Comments: N/A There are no buffer impacts associated with this project.
Page 5 of 10
PCN Form - Version 1.3 December 10, 2008 Version
D. Impact Justification and Mitigation
1. Avoidance and Minimization
1 a. Specifically describe measures taken to avoid or minimize the proposed impacts in designing project.
See Additional Information attached to end of applicaton
1 b. Specifically describe measures taken to avoid or minimize the proposed impacts through construction techniques.
See Additional Information attached to end of application
2. Compensatory Mitigation for Impacts to Waters of the U.S. or Waters of the State
2a. Does the project require Compensatory Mitigation for
impacts to Waters of the U.S. or Waters of the State? ® Yes ? No
2b. If yes, mitigation is required by (check all that apply): ® DWQ ® Corps

2c. If yes, which mitigation option will be used for this
project?

pro ? Mitigation bank

®Payment to in-lieu fee program

? Permittee Responsible Mitigation
3. Complete if Using a Mitigation Bank
3a. Name of Mitigation Bank: N/A
3b. Credits Purchased (attach receipt and letter) Type N/A Quantity N/A
3c. Comments:
4. Complete if Making a Payment to In-lieu Fee Program
4a. Approval letter from in-lieu fee program is attached. ® Yes
4b. Stream mitigation requested: N/A linear feet
4c. If using stream mitigation, stream temperature: ? warm ? cool ?cold
4d. Buffer mitigation requested (DWQ only): N/A square feet
4e. Riparian wetland mitigation requested: 1.0 acres
4f. Non-riparian wetland mitigation requested: 0.0 acres
4g. Coastal (tidal) wetland mitigation requested: 0.0 acres
4h. Comments: N/A
5. Complete if Using a Permittee Responsible Mitigation Plan
5a. If using a permittee responsible mitigation plan, provide a description of the proposed mitigation plan.
N/A
Page 6 of 10
PCN Form - Version 1.3 December 10, 2008 Version
6. Buffer Mitigation (State Regulated Riparian Buffer Rules) - required by DWQ
6a. Will the project result in an impact within a protected riparian buffer that requires ? Yes ® No
buffer mitigation?
6b. If yes, then identify the square feet of impact to each zone of the riparian buffer that requires mitigation. Calculate the
amount of mitigation required.
6c. 6d. 6e.
Zone Reason for impact Total impact Multiplier Required mitigation
(square feet) (square feet)
Zone 1 3 (2 for Catawba)
Zone 2 1.5
6f. Total buffer mitigation required: N/A
6g. If buffer mitigation is required, discuss what type of mitigation is proposed (e.g., payment to private mitigation bank,
permittee responsible riparian buffer restoration, payment into an approved in-lieu fee fund).
N/A
6h. Comments: N/A
Page 7 of 10
PCN Form - Version 1.3 December 10, 2008 Version
E. Stormwater Management and Diffuse Flow Plan (required by DWQ)
1. Diffuse Flow Plan
1 a. Does the project include or is it adjacent to protected riparian buffers identified ? Yes ® No
within one of the NC Riparian Buffer Protection Rules?
1 b. If yes, then is a diffuse flow plan included? If no, explain why.
? Yes ? No
Comments: N/A
2. Stormwater Management Plan
2a. What is the overall percent imperviousness of this project? < 1 %
2b. Does this project require a Stormwater Management Plan? ® Yes ? No
2c. If this project DOES NOT require a Stormwater Management Plan, explain why:
2d. If this project DOES require a Stormwater Management Plan, then provide a brief, narrative description of the plan:
? Certified Local Government
2e. Who will be responsible for the review of the Stormwater Management Plan? ® DWQ Stormwater Program
? DWQ 401 Unit
3. Certified Local Government Stormwater Review
3a. In which local government's jurisdiction is this project? USMC Base
® Phase II
? NSW
3b . Which of the following locally-implemented stormwater management programs ? USMP
apply (check all that apply): ? Water Supply Watershed
? Other:
3c. Has the approved Stormwater Management Plan with proof of approval been ? Yes ® No
attached?
4. DWQ Stormwater Program Review
® Coastal counties
? HQW
4a . Which of the following state-implemented stormwater management programs apply ? ORW
(check all that apply): ? Session Law 2006-246
? Other:
4b. Has the approved Stormwater Management Plan with proof of approval been
? Yes ® No
attached?
5. DWQ 401 Unit Stormwater Review
5a . Does the Stormwater Management Plan meet the appropriate requirements? ? Yes ? No
5b . Have all of the 401 Unit submittal requirements been met? ? Yes ? No
Page 8 of 10
PCN Form - Version 1.3 December 10, 2008 Version
F. Supplementary Information
1. Environmental Documentation (DWQ Requirement)
1 a. Does the project involve an expenditure of public (federal/state/local) funds or the ® Yes ? No
use of public (federal/state) land?
1 b. If you answered "yes" to the above, does the project require preparation of an
environmental document pursuant to the requirements of the National or State ® Yes ? No
(North Carolina) Environmental Policy Act (NEPA/SEPA)?
1 c. If you answered "yes" to the above, has the document review been finalized by the
State Clearing House? (If so, attach a copy of the NEPA or SEPA final approval
® Yes ? No
letter.)
Comments: Final EIS dated December 2009 - US Marines Corps Grow the Force
2. Violations (DWQ Requirement)
2a. Is the site in violation of DWQ Wetland Rules (15A NCAC 2H .0500), Isolated
Wetland Rules (15A NCAC 2H .1300), DWQ Surface Water or Wetland Standards, ? Yes ® No
or Riparian Buffer Rules (15A NCAC 2B .0200)?
2b. Is this an after-the-fact permit application? ? Yes ® No
2c. If you answered "yes" to one or both of the above questions, provide an explanation of the violation(s): N/A
3. Cumulative Impacts (DWQ Requirement)
3a. Will this project (based on past and reasonably anticipated future impacts) result in ® Yes ? No
additional development, which could impact nearby downstream water quality?
3b. If you answered "yes" to the above, submit a qualitative or quantitative cumulative impact analysis in accordance with the
most recent DWQ policy. If you answered "no," provide a short narrative description.
Cumulative Impact Analysis provided in December 2009 EIS
4. Sewage Disposal (DWQ Requirement)
4a. 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.
Project will not involve the generation of wastewater.
Page 9 of 10
PCN Form - Version 1.3 December 10, 2008 Version
5. Endangered Species and Designated Critical Habitat (Corps Requirement)
5a. Will this project occur in or near an area with federally protected species or ? Yes No
habitat?
5b. Have you checked with the USFWS concerning Endangered Species Act ? Yes No
impacts?
El Raleigh
5c. If yes, indicate the USFWS Field Office you have contacted.
? Asheville
5d. What data sources did you use to determine whether your site would impact Endangered Species or Designated Critical
Habitat?
Field Surveys and MCB GIS data. See additional information attached to the end of this PCN Form
6. Essential Fish Habitat (Corps Requirement)
6a. Will this project occur in or near an area designated as essential fish habitat? ? Yes ® No
6b. What data sources did you use to determine whether your site would impact Essential Fish Habitat?
South Atlantic Habitat and Ecosystem IMS.
7. Historic or Prehistoric Cultural Resources (Corps Requirement)
7a. Will this project occur in or near an area that the state, federal or tribal
governments have designated as having historic or cultural preservation ? Yes ® No
status (e.g., National Historic Trust designation or properties significant in
North Carolina history and archaeology)?
7b. What data sources did you use to determine whether your site would impact historic or archeological resources?
Review of Camp hejeune GIS data. Historic and Cultural Resources were also identified in the 2009 Grow the Force EIS.
8. Flood Zone Designation (Corps Requirement)
8a. Will this project occur in a FEMA-designated 100-year floodplain? ® Yes ? No
8b. If yes, explain how project meets FEMA requirements: FEMA requirments not applicable to military bases
8c. What source(s) did you use to make the floodplain determination? NC Flood Maps

Applicant/Agent's Printed ame Applicant/Agent's Signature [late
(Agent's signature is valid only if an authorization letter from the applicant
is provided.)
Page 10 of 10
PCN Form - Version 1.3 December 10, 2008 Version
AECOM
Additional Information
Cogdels Creek Main Battle Tank Connector Road
B. Project Information and Prior Project History
3d. Explain the purpose of the proposed project.
A permanent incremental increase of about 7,000 Marine Corps personnel is currently underway at
Marine Corps Base (MCB) Camp Lejeune (Base) under the Grow the Force initiative. To support this
growth, the USMC has proposed a combination of: (1) new infrastructure construction (e.g. buildings,
roads, utility lines/equipment); (2) demolition and/or upgrades to existing infrastructure; and (3)
relocating existing units and personnel to consolidate and better support combat missions. These
expansions are to address current deficiencies as well as in support of new facilities that were
proposed for construction under Base expansion as documented in the Final Environmental Impact
Statement (EIS) USMC Grow the Force in North Carolina (December 2009).
As part of the Base expansion new Bachelor Enlisted Quarters (BEQ) were constructed to the south
of Sneeds Ferry Road in the French Creek area of the Base. The construction of the BEQ is currently
underway. One of the consequences of the construction of the French Creek BEQ is that main battle
tank access from tank maintenance facilities along McHugh Boulevard and Duncan Street and other
areas south of Cogdels Creek will be re-routed.
Tanks from the Hadnot Point and French Creek area are frequently shipped off Base for deployment,
maintenance, and training. Shipping the tanks by rail is the most cost effective mode of
transportation. The railhead for loading and shipping tanks is located north of Ash Street between
Michael Road and Railroad Road, within the northern portion of Hadnot Point. The current access to
the railhead from the tank maintenance facilities along McHugh Boulevard and Duncan Street is via a
series of improved tank trails as shown on Figure 1. When construction of the French Creek BEQ is
complete, use of the current tank trail will be closed. Therefore, it will be necessary to construct a new
tank connector road across Cogdels Creek to access the railhead.
Besides use of the tank trail by tanks, the tank trail will be used by other heavy equipment being
transported to the railhead and by troop formations to access the gas chamber training facility on the
east side of Sneads Ferry Road.
3e. Describe the project in detail, including type of equipment to be used.
The new tank connector road is about 3,800 feet in length and will consist of dirt and gravel. Side
slopes on the tank trail will be 4:1 except in wetland areas were 2:1 slopes are specified to reduce
impacts. Articulated concrete block mats will be used on the side slopes in the wetlands to prevent
erosion of the slope.
The tank trail will be 50 feet wide. This width allows for a M88 Recovery Vehicle (basically a tank with
a crane mounted to it) to be aligned perpendicular to a disabled tank for lifting or moving the disabled
tank for repair or maintenance. The 50-foot width also allows for two tanks with mine plows to safely
pass each other.
Two main wetland areas will be crossed by the connector road. The first wetland crossing is
associated with Cogdels Creek. Wetlands in this area are a mix of emergent/scrub in the mid-portion
with forested wetlands along the edge. At the tank trail crossing no defined stream channel is present.
AECOM
The wetlands in this area are about 300 feet in width. Four 60-inch corrugated metal pipes are
proposed at the mid portion of the wetland to allow for flow through the wetland. The lower portion of
the pipes will be buried below the ground surface, and a baffle will be installed to prevent scouring.
Aluminum headwalls will be constructed to minimize the length of pipe and the width of the fill at the
pipes. Additionally two 36-inch corrugated pipes are proposed toward each edge of the wetland (one
on each edge) to help maintain hydraulic conductivity through the wetland.
The second wetland crossing is of a 100-foot wide wetland swale that drains into the Cogdels Creek
wetlands. No channel is present in this wetland. Three 60-inch corrugated pipes with aluminum
headwalls are proposed at this wetland crossing.
4 Jurisdictional Determination
The wetlands were delineated by Tetra Tech in 2010. The wetland boundary was surveyed by
Charles F. Riggs and Associates and a jurisdictional package was submitted to the US Army Corps of
Engineers. A Jurisdictional Determination was issued by the USACE on March 24, 2011 (Action Id.
SAW-2010-01798).
D. Impact justification and Mitigation
1.a Specifically describe measures taken to avoid or minimize the proposed impacts in
designing project.
Several different alternatives were initially evaluated for the connector road. An option that would
begin at the end of Duncan Street, and extend across a small stream and wetland was eliminated
early in the process because of the steep terrain on the east side of the stream, and extensive
wetlands along the base of the slope.
Three Alternatives for the location of the tank connector road were developed and evaluated. Using a
consistent 50 foot wide corridor, impacts were calculated for these three alternative routings of the
tank trail as shown on Figure 2.
• Alternative 1 impacted 29,900 square feet
• Alternative 2 impacted 30,700 square feet
• Alternative 3 impacted 27,800 square feet
Based upon Alternative 3 providing the least amount of wetland impacts design of Alternative 3 has
been carried forward. It has been slightly revised from its initial alignment and the current design is
shown as 3A on the figure.
In addition to alignment alternatives several bridging alternatives were also evaluated and compared.
There are two primary wetland areas that are crossed by Alternate 3, one crossing is about 350 feet
wide and the second is about 150 feet wide. The alternatives evaluated included:
• Bridging the entire length of both wetlands
• A 100-ft bridge with 125 ft filled approaches at the 350 ft wetland crossing and a 100-ft bridge
at the 150 ft crossing.
• No bridge - crossing with culverts
AECOM
The following table compares wetland impacts and cost for the three alternatives.
Alternative Wetland Impacts Cost
350 foot bridge and 150 foot Permanent - 0.14 acres
$6
516
800
brid
ge Temporary - 1.18 acres ,
,
2 - 100 foot bridges and 250 ft Permanent - 0.58 acres
$2
839
200
approach in wetland Temporary - 0.81 acres ,
,
Culvert(s) and approach in Permanent - 0.93 acres
$713
020
wetland Temporary - 0.39 acres ,
The above estimates are for the two main wetland crossings only and do not include the cost of the
remaining tank road. The costs for the bridge construction are for the bridge only and do not include
costs for a temporary construction bridge if required. The estimated cost for the entire tank trail with
culverts is $1,830,000.
Efforts to minimize wetland impacts have included:
• Use of 2:1 slopes in wetland areas to minimize the foot print of the tank trail.
• Articulated concrete block mats on the 2:1 slopes in the wetland to protect the slopes and
prevent erosion.
• Elevation of tank trail through the wetlands was kept as low as possible (will be overtopped
during 100-year flood event)
• Additional culverts added in approach areas to maintain hydraulic/connectivity flow through
the wetlands
1b. Specifically describe measures taken to avoid or minimize the proposed impacts through
construction techniques.
Soil and erosion control BMPs will be implemented to prevent silt and sediment from impacting
wetland areas during construction.
The specification of pre-constructed corrugated aluminum pipes and aluminum headwalls will
minimize construction impacts.
E. Stormwater Management and Diffuse Flow Plan
A stormwater management plan is currently under preparation and will be submitted to the NC
Division of Water Quality for their approval.
F. Supplementary Information
5. Endangered Species and Designated Critical Habitat
A review of GIS data provided by Camp Lejeune indicated that there are no known locations of
Threatened or Endangered species in the Cogdels Creek Area. Field surveys performed by AECOM
AECOM
biologists did not identify potential habitat for any listed Threatened or Endangered species that are
know to occur in Onslow County or on the Base.
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