HomeMy WebLinkAbout20061327 Ver 1_More Info Received_20070315v~M~IQM~CREED
UPS DELIVERY ~~D' ~ 3~`~
To Division of Water Quality
401 /Wetlands Unit
1650 Mail Service Center
Raleigh, NC 27699-1650
ATTENTION: Cyndl KaTOIy
WE ARE SENDING: ^ Originals ®Prints
^ Specifications ^ Calculations
^ Shop Drawings ^ Samples
^ Other -
Quantity Drawing No Rev. Description I Status
5 NWP 14 Permit & Mitigation Plan with Narrative ~ G
5 24" X 36" Full Size Plan Set w/revised shts 1, 3, 4, 5, & 6 G
Issue Status Code: A. Preliminary B. Fabrication Only C. For Information D. Bid
E. Construction F. For Review & Comments G. For Approval H. See Remarks
Action Status Code: 1. No Exceptions Taken 2. Make Corrections Noted 3.Other
4. Amend & Resubmit 5. Rejected -See Remarks
REMARKS: Cyndi -this permit request was originally submitted 8/15/06 and following a joint meeting
there after with COE &DWQ was revised and resubmitted 11/15/06. This submittal is in response to recent
comments from Noelle Lutheran where total permanent impacts are now 0.0260 acres. The earlier
submittals included the application fee, original signature, EEP documents, etc. i.e. a complete package.
Revised application pages are so noted. Everything else is in order. Please complete the DWQ review.
We are delivering Noelle's package directly to help facilitate as she is directly knowledgeable, and had
requested these project revisions.
243 NORTH FRONT STREET, WILMINGTON, NC 28401 (970) 343-1048 FAX (910) 251-8282
~~~ Noelle Lutheran w/enclosure McKIM & CREED, PA
Ken Wrangell w/ enclosure ~.e, -
William Scudder w/enclosure ~ ~: _ , '
File w/ enclosoure ~~~~ ~ Signed ~ ! ~~
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Mar aret ray
LETTER OF TRANSMITTAL
DATE: March 14, 2007
PROJECT NO: 4005_0003
4289-0006 TASK NO: 40
RE: Watermark Landing -Revised
NWP 14 Permit Application
TRANSMITTAL NO: PAGE 1 OF 1
Office Use Only' Form Version March OS
USACE Action ID No. DWQ No. O to - ~ 3 a..~7
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(lt any particwar item is nog apFu~au,c ~., ~tu~ Y,v~~..~, },••,••~•, •••,•.•,• • ••,• . -rr
I. Processing
Check all of the approval(s) requested for this project:
® Section 404 Permit ^ Riparian or Watershed Buffer Rules
^ Section 10 Permit ^ Isolated Wetland Permit from DWQ
® 401 Water Quality Certification ^ Express 401 Water Quality Certification
2. Nationwide, Regional or General Permit Number(s) Requested: 14
3. If this notification is solely a courtesy copy because written approval for the 401 Certification
is not required, check here: ^
4. If payment into the North Carolina Ecosystem Enhancement Program (NCEEP) is proposed
for mitigation of impacts, attach the acceptance letter from NCEEP, complete section VIII,
and check here:
If your project is located in any of North Carolina's twenty coastal counties (listed on page
4), and the project is within a North Carolina Division of Coastal,. Management Area of
Environmental Concern (see the top of page 2 for further details); check'here:
II. Applicant Information
E;~.
1. Owner/Applicant Information . ~ ~, ~ ~ ~
Name: Ken Wrangell Member Manager of Stowmac, LLC
Mailing Address: Stowmac LLC
Post Office Box 3234
Wilmington NC 28046
Telephone Number: 910-794-8704 Fax Number: 910-254-0215
E-mail Address: kwrangell(a~wrangellhomes com
2. Agent/Consultant Information (A signed and dated copy of the Agent Authorization letter
must be attached if the Agent has signatory authority for the owner/applicant.)
Name: Richard M. Collier P.E.
Company Affiliation: McKim & Creed PA
Mailing Address: 243 North Front Street
Wilmington NC 28401
Telephone Number: (910) 343-1048 Fax Number: (9101251-8282
E-mail Address: rcollier(a~mckimcreed com
Page 5 of 12
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III. Project Information
Attach a vicinity map clearly showing the location of the property with respect to local
landmarks such as towns, rivers, and roads. Also provide a detailed site plan showing property
boundaries and development plans in relation to surrounding properties. Both the vicinity map
and site plan must include a scale and north arrow. The specific footprints of all buildings,
impervious surfaces, or other facilities must be included. If possible, the maps and plans should
include the appropriate USGS Topographic Quad Map and NRCS Soil Survey with the property
boundaries outlined. Plan drawings, or other maps may be included at the applicant's discretion,
so long as the property is clearly defined. For administrative and distribution purposes, the
USACE requires information to be submitted on sheets no larger than 11 by 17-inch format;
however, DWQ may accept paperwork of any size. DWQ prefers full-size construction drawings
rather than a sequential sheet version of the full-size plans. If full-size plans are reduced to a
small scale such that the final version is illegible, the applicant will be informed that the project
has been placed on hold until decipherable maps are provided.
1. Name of project: Watermark Landing
2. T.I.P. Project Number or State Project Number (NCDOT Only): NA
3. Property Identification Number (Tax PIN): 20-3796500
4. Location
County: New Hanover Nearest Town: Cape Fear Township
Subdivision name (include phase/lot number): Watermark Landing_
Directions to site (include road numbers/names, landmarks, etc.): Carolina Beach Road (US
421) south to Sanders Road (SR 1187) Turn right or west on Sanders Road to River Road.
Turn left or south on River Road Travel proximately 3.5 miles to the rear entrance of The
Cape The project is on the west side of River Road directly across from The Cape.
5. Site coordinates (For linear projects, such as a road or utility line, attach a sheet that
separately lists the coordinates for each crossing of a distinct waterbody.)
Decimal Degrees (6 digits minimwn): 34°04'33" °N 77°55' 17" °W
6. Property size (acres): 64.62
7. Name of nearest receiving body of water: Cape Fear River
8. River Basin: Cape Fear
(Note -this must be one of North Carolina's seventeen designated major river basins. The
River Basin map is available at http://h2o.enr.state.nc.us/admin/maps/.)
9. Describe the existing conditions on the site and general land use in the vicinity of the project
at the time of this application: The existing site is undeveloped and made up of undisturbed
wetland areas of mature trees with under story growth. Weeds, plants, and other brush are
present An existing dirt path is on site from River Road to the Cape Fear River.
Page 6 of 12
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10. Describe the overall project in detail, including the type of equipment to be used:
The project is a 33 duplex family residential development with a clubhouse. See narrative for
further details.
11. Explain the purpose of the proposed work: Roadway and utility construction to facilitate
future 33-duplex family residential development with clubhouse. Bulkheads will be utilized
to raise the entire site to proximately elevation 10' to be above the 100-yr flood plain, with
minimal wetland crossings See narrative for further details.
IV. Prior Project History
If jurisdictional determinations and/or permits have been requested and/or obtained for this
project (including all prior phases of the same subdivision) in the past, please explain. Include
the USACE Action ID Number, DWQ Project Number, application date, and date permits and
certifications were issued or withdrawn. Provide photocopies of previously issued permits,
certifications or other useful information. Describe previously approved wetland, stream and
buffer impacts, along with associated mitigation (where applicable). If this is a NCDOT project,
list and describe permits issued for prior segments of the same T.I.P. project, along with
construction schedules. NCDENR Stormwater Permit SW8 060630 issued September 12, 2006
New Hanover County Planning Board Approval issued March 9 2006
New Hanover County Stormwater Approval issued October 13 2006
V. Future Project Plans
Are any future permit requests anticipated for this project? If so, describe the anticipated work,
and provide justification for the exclusion of this work from the current application.
No future projects are anticipated for this site.
VI. Proposed Impacts to Waters of the United States/Waters of the State
It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to
wetlands, open water, and stream channels associated with the project. Each impact must be
listed separately in the tables below (e.g., culvert installation should be listed separately from
riprap dissipater pads). Be sure to indicate if an impact is temporary. All proposed impacts,
permanent and temporary, must be listed, and must be labeled and clearly identifiable on an
accompanying site plan. All wetlands and waters, and all streams (intermittent and perennial)
should be shown on a delineation map, whether or not impacts are proposed to these systems.
Wetland and stream evaluation and delineation forms should be included as appropriate.
Photographs may be included at the applicant's discretion. If this proposed impact is strictly for
wetland or stream mitigation, list and describe the impact in Section VIII below. If additional
space is needed for listing or description, please attach a separate sheet.
1. Provide a written description of the proposed impacts: Three crossings of water of the US
404 & 401 wetlands are proposed. The crossings propose permanent impacts in the way of
fill for road crossings One crossing will include a culvert for equalization. Utilities will also
Page 7 of 12
~~~~~ 3I~ L o7
be placed underground within the fill crossings to eliminate additional impacts. See narrative
for further details.
2. Individually list wetland impacts. Types of impacts include, but are not limited to
mechanized clearing, grading, fill, excavation, flooding, ditching/drainage, etc. For dams,
separately list impacts due to both structure and flooding.
Wetland Impact
Site Number
(indicate on map)
Type of Impact Type of Wetland
(e.g., forested, marsh,
herbaceous, bog, etc.) Located within
100-year
Floodplain
( es/no) Distance to
Nearest
Stream
(linear feet) Area of
Impact
(acres)
W #1 Fill Forested wetland Yes 621 0.0041
W #2 Fill Forested wetland Yes 621 0.0006
W #3 Culvert /Fill Forested wetland Yes 747 0.0213
W # 1 T Temporary Disturbance Forested wetland Yes 621 0.0049
W #2T Temporary Disturbance Forested wetland Yes 621 0.0016
W #3T-L Temporary Disturbance Forested wetland Yes 747 0.0020
W #3T-R Temporary Disturbance Forested wetland Yes 747 0.0014
Permanent Total Wetland Impact (acres) 0.0260
Temporary Total Wetland Impact (acres) 0.0099
Total Wetland Impact (acres) Permanent + Temporary 0.0359
3. List the total acreage (estimated) of all existing wetlands on the property: 51.13
4. Individually list all intermittent and perennial stream impacts. Be sure to identify temporary
impacts. Stream impacts include, but are not limited to placement of fill or culverts, dam
construction, flooding, relocation, stabilization activities (e.g., cement walls, rip-rap, crib
walls, gabions, etc.), excavation, ditching/straightening, etc. If stream relocation is proposed,
plans and profiles showing the linear footprint for both the original and relocated streams
must be included. To calculate acreage, multiply length X width, then divide by 43,560.
Stream Impact
Number
(indicate on ma)
Stream Name
Type of Impact
Perennial or
Intermittent? Average
Stream Width
Before Im act Impact
Length
(linear feet) Area of
Impact
(acres)
NA
Total Stream Impact (by length and acreage)
5. Individually list all open water impacts (including lakes, ponds, estuaries, sounds, Atlantic
Ocean and any other water of the U.S.). Open water impacts include, but are not limited to
fill, excavation, dredging, flooding, drainage, bulkheads, etc.
Open Water Impact
Name of Waterbody Type of Waterbody Area of
Site Number (if applicable) Type of Impact (lake, pond, estuary, sound, bay, Impact
(indicate on ma) ocean, etc.) (acres)
NA
Total Open Water Impact (acres)
Page 8 of 12
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6. List the cumulative impact to all Waters of the U.S. resulting from the project:
Stream Impact (acres): NA
Wetland Impact (acres): 0.0260
Open Water Impact (acres): NA
Total Impact to Waters of the U.S. (acres) 0.0260
Total Stream Impact (linear feet): NA
7. Isolated Waters
Do any isolated waters exist on the property? ^ Yes ®No
Describe all impacts to isolated waters, and include the type of water (wetland or stream) and
the size of the proposed impact (acres or linear feet). Please note that this section only applies
to waters that have specifically been determined to be isolated by the USACE.
8. Pond Creation
If construction of a pond is proposed, associated wetland and stream impacts should be
included above in the wetland and stream impact sections. Also, the proposed pond should be
described here and illustrated on any maps included with this application.
Pond to be created in (check all that apply): ^ uplands ^ stream ^ wetlands
Describe the method of construction (e.g., dam embankment, excavation, installation of
draw-down valve or spillway, etc.): NA
Proposed use or purpose of pond (e.g., livestock watering, irrigation, aesthetic, trout pond,
local stormwater requirement, etc.): NA
Current land use in the vicinity of the pond: NA
Size of watershed draining to pond: NA Expected pond surface area: NA
VII. Impact Justification (Avoidance and Minimization)
Specifically describe measures taken to avoid the proposed impacts. It may be useful to provide
information related to site constraints such as topography, building ordinances, accessibility, and
financial viability of the project. The applicant may attach drawings of alternative, lower-impact
site layouts, and explain why these design options were not feasible. Also discuss how impacts
were minimized once the desired site plan was developed. If applicable, discuss construction
techniques to be followed during construction to reduce impacts. Roadway wetland crossings
have been avoided and minimized by crossing at the narrowest widths and reducing pavement
sections at the crossing areas. Sub-agueous utilities will be located within these fill areas to
eliminate additional impacts Alterative designs were proposed. See narrative for further details.
VIII. Mitigation
DWQ - In accordance with 15A NCAC 2H .0500, mitigation may be required by the NC
Division of Water Quality for projects involving greater than or equal to one acre of impacts to
freshwater wetlands or greater than or equal to 150 linear feet of total impacts to perennial
streams.
Page 9 of 12
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USACE - In accordance with the Final Notice of Issuance and Modification of Nationwide
Permits, published in the Federal Register on January 15, 2002, mitigation will be required when
necessary to ensure that adverse effects to the aquatic environment are minimal. Factors
including size and type of proposed impact and function and relative value of the impacted
aquatic resource will be considered in determining acceptability of appropriate and practicable
mitigation as proposed. Examples of mitigation that may be appropriate and practicable include,
but are not limited to: reducing the size of the project; establishing and maintaining wetland
and/or upland vegetated buffers to protect open waters such as streams; and replacing losses of
aquatic resource functions and values by creating, restoring, enhancing, or preserving similar
functions and values, preferable in the same watershed.
If mitigation is required for this project, a copy of the mitigation plan must be attached in order
for USACE or DWQ to consider the application complete for processing. Any application
lacking a required mitigation plan or NCEEP concurrence shall be placed on hold as incomplete.
An applicant may also choose to review the current guidelines for stream restoration in DWQ's
Draft Technical Guide for Stream Work in North Carolina, available at
http://h2o.enr.state.nc.us/ncwetlands/strm~ide.html.
1. Provide a brief description of the proposed mitigation plan. The description should provide as
much information as possible, including, but not limited to: site location (attach directions
and/or map, if offsite), affected stream and river basin, type and amount (acreage/linear feet)
of mitigation proposed (restoration, enhancement, creation, or preservation), a plan view,
preservation mechanism (e.g., deed restrictions, conservation easement, etc.), and a
description of the current site conditions and proposed method of construction. Please attach
a separate sheet if more space is needed.
Excludin_g the 0 0260 acres of wetlands to be disturbed, the remaining wetlands will remain
at a 2.1 ratio preserved through a home owners association. The owner proposes payment
into the NC Ecosystem Enhancement Program. See narrative for further details.
2. Mitigation may also be made by payment into the North Carolina Ecosystem Enhancement
Program (NCEEP). Please note it is the applicant's responsibility to contact the NCEEP at
(919) 715-0476 to determine availability, and written approval from the NCEEP indicating
that they are will to accept payment for the mitigation must be attached to this form. For
additional information regarding the application process for the NCEEP, check the NCEEP
website at http://h2o.enr.state.nc.us/wrp/index.htm. If use of the NCEEP is proposed, please
check the appropriate box on page five and provide the following information:
Amount of stream mitigation requested (linear feet): NA
Amount of buffer mitigation requested (square feet): NA
Amount of Riparian wetland mitigation requested (acres): NA
Amount ofNon-riparian wetland mitigation requested (acres): see narrative for further details
Amount of Coastal wetland mitigation requested (acres): NA
Page 10 of 12
~~ ~~~~
IX. Environmental Documentation (required by DWQ)
1. Does the project involve an expenditure of public (federal/state/local) funds or the use of
public (federal/state) land? Yes ^No
2. If yes, does the project require preparation of an environmental document pursuant to the
requirements of the National or North Carolina Environmental Policy Act (NEPA/SEPA)?
Note: If you are not sure whether a NEPA/SEPA document is required, call the SEPA
coordinator at (919) 733-5083 to review current thresholds for environmental documentation.
Yes ^ No ^
3. If yes, has the document review been finalized by the State Clearinghouse? If so, please
attach a copy of the NEPA or SEPA final approval letter. Yes ^ No ^
X. Proposed Impacts on Riparian and Watershed Buffers (required by DWQ)
It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to
required state and local buffers associated with the project. The applicant must also provide
justification for these impacts in Section VII above. All proposed impacts must be listed herein,
and must be clearly identifiable on the accompanying site plan. All buffers must be shown on a
map, whether or not impacts are proposed to the buffers. Correspondence from the DWQ
Regional Office may be included as appropriate. Photographs may also be included at the
applicant's discretion.
1. Will the project impact protected riparian buffers identified within 15A NCAC 2B .0233
(Meuse), 15A NCAC 2B .0259 (Tar-Pamlico), 15A NCAC 02B .0243 (Catawba) 15A NCAC
2B .0250 (Randleman Rules and Water Supply Buffer Requirements), or other (please
identify )? Yes ^ No
2. If"yes", identify the square feet and acreage of impact to each zone of the riparian buffers. If
buffer mitigation is required calculate the required amount of mitigation by applying the
buffer multipliers.
Zone* Impact Multiplier Required
(s uare feet) Miti ation
1 NA 3 (2 for Catawba) NA
2 NA 1.5 NA
Total NA NA
* Zone 1 extends out 30 feet perpendicular from the top of the near bank of channel; Zone 2 extends an
additiona120 feet from the edge of Zone 1.
3. If buffer mitigation is required, please discuss what type of mitigation is proposed (i.e.,
Donation of Property, Riparian Buffer Restoration /Enhancement, or Payment into the
Riparian Buffer Restoration Fund). Please attach all appropriate information as identified
within 1 SA NCAC 2B .0242 or .0244, or .0260. NA
Page 11 of 12
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XI. Stormwater (required by DWQ) ~~ ~ t ~ ~ C ~t~
Describe impervious acreage (existing and proposed) versus total acreage on the site. Discuss
Stormwater controls proposed in order to protect surface waters and wetlands downstream from
the property. If percent impervious surface exceeds 20%, please provide calculations
demonstrating total proposed impervious level. No existing impervious area. Proposed (4.25 AC)
impervious area versus total acreage on the site (64.62 AC) is 6.58% impervious coverage.
Infiltration trenches will be employed to treat the Stormwater. See narrative for further details.
XII. Sewage Disposal (required by DWQ)
Clearly detail the ultimate treatment methods and disposition (non-discharge or discharge) of
wastewater generated from the proposed project, or available capacity of the subject facility.
Wastewater will be disposed of via force main and rg avity sewer line to an existing_public
wastewater system.
XIII. Violations (required by DWQ)
Is this site in violation of DWQ Wetland Rules (15A NCAC 2H .0500) or any Buffer Rules?
Yes ^No
Is this anafter-the-fact permit application? Yes ^No
XIV. Cumulative Impacts (required by DWQ)
Will this project (based on past and reasonably anticipated future impacts) result in additional
development, which could impact nearby downstream water quality? Yes ^ No
If yes, please submit a qualitative or quantitative cumulative impact analysis in accordance with
the most recent North Carolina Division of Water Quality policy posted on our website at
http://h2o.enr.state.nc.us/ncwetlands. If no, please provide a short narrative description:
XV. Other Circumstances (Optional):
It is the applicant's responsibility to submit the application sufficiently in advance of desired
construction dates to allow processing time for these permits. However, an applicant may choose
to list constraints associated with construction or sequencing that may impose limits on work
schedules (e.g., draw-down schedules for lakes, dates associated with Endangered and
Threatened Species, accessibility problems, or other issues outside of the applicant's control).
Construction seckuencing has been coordinated with NCDOT for improvements on SR 1100
River Road. An expeditious review would coordinate these efforts.
Applicant/Agent's Signature Date
(Agent's signature is valid only if an authorization letter from the applicant is provided.)
Page 12 of 12
o ~ - 13 2~~1
NATIONWIDE PERMIT 14
DESIGN NARRATIVE
WATERMARK LANDING
New Hanover County, NC
Cape Fear Township
McKim & Creed Project #04005-0003
March 7, 2007
Prepared for:
Stowmac, LLC
Post Office Box 3234
Wilmington, NC 28406
(910) 792-1123
Prepared by:
v l~~Ia[M~C:IZ~~ED
v
243 North Front Street
Wilmington, NC 28401
(910) 343-1048
WATERMARK LANDING
New Hanover County, NC
Cape Fear Township
McKim & Creed Project #04005-0003
January 10, 2007
Table of Contents
DESIGN NARRATIVE
Existing Site
Proposed Improvements
Avoidance and Minimization
Maintenance
ATTACHMENT 1 -BUILT UPON CALCULATIONS (no revisions since August 14,
2006)
ATTACHMENT 2 -MODEL DECLARATION OF RESTRICTIONS
ATTACHMENT 3 - EEP IN-LIEU REQUEST FORM
ATTACHMENT 4 -CONSTRUCTION PLANS (Revised March 7, 2007)
Page i
WATERMARK LANDING
New Hanover County, NC
Cape Fear Township
McKim & Creed Project #04005-0003
January 10, 2007
DESIGN NARRATIVE
Existing Site
Stowmac, LLC owns a 64.62 acre tract of land, located in New Hanover County at the 8400
River Road (SR 1100), approximately 3.5 miles south of the intersection of River Road (SR
1100) and Sanders Road (SR 1187).
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The existing site is undeveloped and sparsely to moderately wooded with undisturbed upland
and wetland areas with mature trees and under story growth.
The New Hanover County SCS Soil Survey indicates that the predominate soil within the project
limits site is Kureb sand (Kr). The remainder of the property boundary contains Leon sand (Le),
Borrow pits (Bp), Lynn Haven fine sand (Ly), and Dorovan soils (DO). All of these soil types
have well drained soils that have a sand and fine sand surtace layer and a sand, fine sandy
loam, and loamy fine sand subsoil or underlying layer; on uplands. The seasonal high water
table is greater than 6 ft below grade.
Page 1
Figure 1 -Site Vicinity Map
The proposed project area discharges to Cape Fear River. Cape Fear River is within the Cape
Fear River Basin and is classified SC. The classification is dated 08/09/81 and the stream index
number is 18-(71). Wetlands and Coastal Marsh are located within the property boundary;
these areas will be excluded and protected from construction activity.
Prooosed Improvements
The proposed development of this 64.62 acre tract of land will be for 33 duplex residential
homes with an average lot size approximately 0.10 acres. To provide a safe finished floor
elevation, the existing uplands will be built above the 100-year flood elevation (10.0 ft) and
protected with the installation of treated timber bulkheads. The bulkheads will prevent a
sufficient amount of impact to the wetlands and prevent any future accidental disturbances.
The improvements will consist of the clearing and grubbing, wall installation, bridge installation,
cross drainage piping, fill material, roadway and utilities construction.
The project is being pursued as high density. Wetlands have been excluded from the
impervious area percentage calculation. The impervious area is based on the total property
minus the wetland area. The impervious area will be 66,644 sf of roadways, a 12,685 sf
clubhouse, 31,680 sf of driveways, and 33-lots totaling 74,280 sf, making the total built upon
area 185,289 sf, 62.8% of the 294,900 sf drainage area.
To further diminish the adverse environmental effects on surface water quality resulting from
development, stormwater will be treated via infiltration trenches. To maximize the stormwater
runoff treatment and avert possible erosion, roof drains shall tie into the infiltration trenches. As
a comparison to ponds, infiltration trenches BMPs reduce adverse effects of changes in land
use on the aquatic environment. Emergency overflow devices will be set at the 50-yr event in
each individual system. Both the county stormwater regulations and state stormwater
regulations will be accommodated. NCDENR has issued stormwater Permit No. SW8 060630
and New Hanover County has returned Approved drawings with signatures.
Several design concepts have implemented throughout the project history. The project has
been designed and constructed to avoid and minimize adverse effects to waters of the US to
the maximum extent practicable at the project site. Given the limited uplands, options were
limited.
Avoidance and Minimization
The infrastructure has been carefully designed to limit the wetland impacts. The utility trench
will not be constructed with extensive gravel layers of backfill, creating a french drain effect.
The sewer line will be in the center of the roadway. The waterline will be will 5 ft from the edge
of pavement. The force main, where applicable, will be on the opposite side of the roadway, 5
ft from the edge of pavement. The utilities will be within the roadway right-of-way. The width of
the fill is limited to the minimum necessary for a safe crossing. The right-of-way width has been
reduced from 50 ft to 40 ft, to further reduce wetland impacts. While the roads have been
designed to meet NCDOT specifications and New Hanover County requirements they will be
privately dedicated. To further limit wetland impacts, interconnectivity and cul-de-sac lengths
were not obtainable based on the site characteristics. Emergency vehicle "hammer-heads" are
provided in lieu of cul-de-sacs.
Of the 64.62-acre tract of land, 51.13 acres of wetlands are on the property. Two areas of
wetlands totaling 0.0260 acres will be permanently impacted as a consequence of
development. An additional 0.0099 acres will be temporarily impacted during construction. The
Page 2
wetland disturbance is a requirement for roadway and utility crossings. The home owners
association will be responsible for the preservation of the wetlands. A preservation document
from the USACE website will be prepared by an attorney and recorded. The document for
reference is attached. Designating an exact location of preservation is impracticable as the
county also has open space requirements which must be considered. This is discussed in
more detail below. Due to the inability to designate a specific preservation area, the owner
would like to request full payment in-lieu. Further, the existing characteristics of the site prevent
neither on-site restoration nor creation will be an option. The owner proposes payment into the
NC Ecosystem Enhancement Program at a 2:1 ratio. A request for full payment in-lieu has
been submitted and is currently under review.
The impacted areas that are designated as wetlands are typically dry. Culverts will be installed
to provide equalization of the wetlands during sufficient storm events. The stream cross section
will be placed to its original grade and elevation. The ends of the pipes will be flush with
bulkheads with a flared end sections. The flared end sections provide a more smooth transition
of water movement. To promote the safe passage of fish and other aquatic organisms, the
pipes will be buried 20 percent of the culvert diameter. The 20 percent burial will limit the
disruption of the necessary life-cycle movements of those species of aquatic life indigenous to
the water body, including those species that normally migrate through the area. Due to the
negligible flow and to prevent further disturbance, rip rap will not be used. Orange safety
fencing will be installed along the wetland perimeters which are within 100 ft of construction
activities. Details, cross sections, and blowups can be found on sheets CN-101.
The temporary impacts will occur as the bulkheads are being installed. This includes temporary
construction mats (e.g., timber, steel, geotextile) used during construction and removed upon
completion of the work. Temporary silt fence will be installed as erosion control measures. Silt
fencing will be used as noted on the plans and as needed. The length of proposed silt fence
does exceed the 100 ftper'/4 acre of disturbed area criteria. To restore the temporary impacts,
the areas will be backfilled with 6 inches to 12 inches of topsoil taken from the disturbed area.
The areas will be restored to preconstruction contours and elevation. Temporary cleared
wetland areas shall be re-vegetated to the maximum extent practicable with native species of
canopy, shrub, and herbaceous species. Fescue grass shall not be used.
New Hanover County implements an open space policy for new residential developments. To
accommodate the needs of the requirements, the development will install a walking
trail/boardwalk. The boardwalk will be built of pretreated wood with spaces between the
walking planks. The boardwalk will be 6' wide, and elevated approximately 3' above the
existing grade. A detail is located on Plan Sheet 7, CG-501. The boardwalk will be constructed
without the use of heavy machinery, and will not require discharge of fill material into the
wetlands. The boardwalk will be constructed by manpower and the use of hand tools. No
permanent impacts will occur and further permits will not be required to accommodate the
boardwalk. The boardwalk will be part of the home owners association to maintain.
To avoid further wetland impacts, the uplands off Skipjack Trail will be connected via bridge
with pilings. The pilings will be placed on the uplands surrounded by bulkheads, the bridge will
span from one upland to the neighboring upland. Utility line construction will be attached to the
underside of the bridge structure. The bottom of the bridge will be approximately 6 ft above the
water surface, providing more than adequate space for the utilities of three residential units.
The construction of utilities in this area will not impact the wetlands in any manner. Several
discussions and site visits have taken place with representatives of the Division of Coastal
Management. To install a bridge, the DCM will require a CAMA Minor Permit. The area of
concern will not be impacted by culverts, fill, or any other permanent impacts. Construction
Page 3
activities will not commence until a copy of the approved CAMA permit is furnished to USACE
and NCDENR. Attached is a proposal from Steadfast Bridges, which provides construction
details
To further diminish the adverse environmental effects on surface water quality resulting from
development, stormwater will be treated via infiltration trenches. To maximize the stormwater
runoff treatment and avert possible erosion, roof drains shall tie into the infiltration trenches. As
a comparison to ponds, infiltration trenches BMPs reduce adverse effects of changes in land
use on the aquatic environment. Emergency overflow devices will be set at the 50-yr event in
each individual system. Both the county stormwater regulations and state stormwater
regulations will be accommodated. NCDENR has issued stormwater Permit No. SW8 060630
and New Hanover County has returned Approved drawings with signatures.
New Hanover County strictly enforces their 75 ft COD Buffer regulation. New Hanover County
will allow road crossings if no other alternative can be provided. The revised roadway connects
Marada Way and Lanyards End through the 75 ft COD Buffer. New Hanover County does not
favor the idea of placing a road in this area. However, New Hanover County is giving this
crossing consideration.
To maximize the use of the land available on the property, McKim & Creed, PA has explored
various options to limit wetland disturbance and abide by New Hanover County regulations. Of
the 64.62-acre tract of land, 51.13 acres of wetlands are on the property. Two areas of
wetlands totaling 0.0260 acres will be permanently impacted as a consequence of development
(0.05% of the total wetlands).
Maintenance
Sediment will be removed from the infiltration system annually or when the depth in the unit is
reduced to 75% of the original design depth. A benchmark shall be established in each
individual infiltration system. The system shall be restored to the original design depth without
over excavating. Removed sediment shall be hauled offsite. To ensure public safety, the
bulkhead retaining wall shall be inspected and maintained annually and after a sufficient storm
event. Upon completion of construction and the establishment of stabilizing ground cover, the
property owner shall be responsible for site maintenance.
Page 4
ATTACHMENT 1 -BUILT UPON CALCULATIONS
(no revisions since August 14, 2006}
ATTACHMENT 2 -MODEL DECLARATION OF RESTRICTIONS
ATTACHMENT 3 - EEP IN-LIEU REQUEST FORM
ATTACHMENT 4 -CONSTRUCTION PLANS
(Revised March 7, 2007)