HomeMy WebLinkAbout20021159 Ver 2_More Info Received_20070904T~AI,TON ENGINEFRIN
8/23/07
Joanne Steenhuis
Division of Water Quality
127 Cardinal Drive Extension
Wilmington, NC 28405-3845
Joanne: Pr'o~ #' 0 Zl ~ 5 5
r~f~Y°"~r~Eiv
REr~iVED
The following items are a response to the request for additional information.
1. Enclosed are the revised pages 8, 9, and 11 of the PCN that reflect the revised impacts.
2. The restoration plan for the buffer is enclosed and the drawing is also located on the plan.
3. The overall plan is enclosed and is cross-hatched to depict the original wetland fill,
proposed wetland fill, restored utility easement, and wetlands that are to be placed in a
conservation easement.
4. Across section is depicted on the plan that represents all areas of fill. The areas are
basically the same elevation.
5. Enclosed is the information that the USACE requested.
Sincerely,
~--- ~ %~
Adrian L. Moon
Walton Engineering
Q~c~~ae~~
SEP 4 - 2007
nw:Nr~ - w,ar~,~ cwauTY
'WETLANDS A«D ST(>f~+yYATIIt gHgNCH
Tel: 91.0-259-4800 PO Box 895, Burgaw, North Carolina, 28425 I'ax: 910-259-1779
SEP 4
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Site Location Map - `uu~
Reproduction of USGS UCw~ - WATER Uiipl.f7 Y
Oceanaire , S. Shore Dr vi enAr~°sab°srorr~aygr~s~,avc~
Topsail Quadrangle (1970)
Figure Penner County, rvc Surf City, NC
7.5 Minute Series (Topographic)
~ WAL7(~N ENGINEERINCj
WA L TON EN ~INEERIN
Oceanaire Wetland Restoration Plan
Target:
Restore the wetland biological communities, soil conditions, and hydrology on .08 acres of
404 regulated wetlands that have been impacted, due to site activities, to a transitional
condition conducive to a probable recovery to a their original condition to the extent possible.
Restoration Area Benchmarks:
Reestablishment and maintenance of the water table within 12 inches of the soil surface for at
least 12% of the growing season.
Restoration of hydrophytic vegetation as defined as dominance of greater than 50% of species
with wetland indicator status wetter than FAC.
Site Location and Description:
Oceanaire is located 1.8 miles south of the intersection of Hwy 50 and Hwy 210, on Hwy 50
in the town of Surf City in Pender County. Oceanaire is a 6.56 acre planned low-density
(with no curb or gutter) residential development that drains into the Intercoastal Waterway
(stream classification- SA).
According to the published Soil Survey of Pender County, NC, the soils is mapped as
Newhan-Corolla complex.
Areas targeted for restoration include the utility easement(Conservation Easement II) located
within 10 feet of the Road R/W for lots 9, 10, 11, 12, 13, and the pump station area.
Restoration Strategies:
Hydrologic Restoration
Soil structure will normally be restored over time by natural ecological processes. In order to
accelerate re-development of soil structure, restoration methods and equipment shall be
selected to minimize soil damage. The developer shall restore the disturbed 404 regulated
wetland areas to the pre-impacted surface grade. Restoring the pre-impacted grade should, in
turn, recreate the original topographic gradient. This should expedite the restoration of proper
hydrological characteristics of the pre-impacted site by creating the proper enviromnent for
redox conditions to occur within the upper horizons of a hydric soil.
Filled wetland areas will be graded to the pre-impacted surface grade. Simple topographic
measurements from adjacent, non-impacted areas will suffice to set base elevations for the
necessary grading.
Tel: 910-259-4800 PO Box 895; Burgaw, North Carolina, 28425 Fax: 910-259-1779
T'~ALTON .ENGINEFRIN
Original micro-topography shall be re-created to the extent possible. Ruts, stump holes and
any other mechanized disturbances shall be filled in and leveled, removing extreme field bed
or crowns using displaced soil. The re-graded surface shall be roughed over with a plow or
other equipment to re-create the micro-topography. Simple topographic measurements from
non-impacted areas will suffice to set base elevations for necessary grading. Silt fencing will
be added to protect the restored areas to prevent further disturbances and deposition of fill
material from erosion. Upland areas adjacent to restored wetlands will also be graded to a 3:
slope and seeded to prevent future deposition of fill material in the wetlands once the silt
fencing is removed.
Vegetative Restoration
Typical dominant plant species in the adjacent unaffected wetland areas are Polygonum
punctatum, Persea borbonia, Smilax bona-nox, Sci~puss spp, and Magnolia virginiana.
The restored grade and stabilization of the impacted area should create the potential for soil
redox conditions that are conducive for the growth of the typical vegetation of the non-
impacted, adjacent wetlands. The shrub and herb strata shall be allowed to re-establish
voluntarily, due to the potential seed source being in close proximity to the restoration sites.
Monitoring
A three year monitoring plan shall be implemented, utilizing photos and stem counts. The
report will be submitted in early April of each year.
3:1 ^lope (Vegetdtiv~e etdbiliuttion}
Gmde
F71rd W~tldnda
rbed Grode(4' elev. c
Nan-impacted W~etinnde
Typlaal Gnaw-Sectlan
This ie +~ tyRiatf croe~a-section found on
I ~ t s 9,1 x,11,12 ,13 ,14.16.17.
Tel: 910-259-4800 PO Box 895, Burgaw, North Carolina, 28425 Fax: 910-259-1779
1. Provide a written description of the proposed impacts: Small isolated pockets of 404
jurisdictional wetlands
2. Individually list wetland impacts. Types of impacts include, but are not limited to
mechanized clearing, grading, fill, excavation, flooding, ditching/drainage, etc. For dams,
se aratel list im acts due to both structure and floodin .
Wetland Impact
Site Number
(indicate on map)
Type of Impact T}ape of Wetland
(e.g., forested, marsh,
herbaceous, bog, etc.) ~cated within
100 year
Floodplain
( es/no) Distance to
Nearest
Stream
(linear feet) Area of
Impact
(acres)
1 Previous Permitted Fill Freshwater adjacent to salt yes 0 .311
2 Additional Fill Freshwater adjacent to salt yes 0 .174
Total Wetland Impact (acres) .485
3. List the total acreage (estimated) of all existing wetlands on the property: 1.8 ac
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 acrea e multi 1 len h X width, then divide b 43 560
Stream Impact
Number
indicate on ma
Stream Name
Type of Impact Perennial or
Intermittent? Average
Stream Width
Before Im act Impact ~
Len
(lineart) Area of
Im act
(a ces)
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, dred~in~, flooding. draina~e_ hulkheadr Pty
Open Water linpact
Name of Waterbody Type of Waterbody Area. of
Site Number (if applicable) Type of Impact (lake, pond, estuary, sound, bay, Impact
(indicate on map) ocean, etc.) (acres)
Page 8 of 13
Total Open Water Impact. (acres)
6. List the cumulative impact to all Waters of the U. S. resulting from the proiect:
Stream Im act acres
Wetland Im act (acres): .485
O en Water Impact (acres):
Total Im act to Waters of the U. S. (acres) .485
Total Stream Impact (linear feet):
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.):
Proposed use or purpose of pond (e.g., livestock watering, irrigation, aesthetic, trout pond,
local stormwater requirement, etc.):
Current land use in the vicinity of the pond:
Size of watershed draining to pond: Expected pond surface area:
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. See attached.
VIII. Mitigation
Page 9 of 13
Amount ofNon-riparian wetland mitigation requested (acres): 1 ac
Amount of Coastal wetland mitigation requested (acres):
IX.
X.
Environmental Documentation (required by DWQ)
Does the project involve an expenditure of public (federal/state/local) funds or the use of
public (federal/state) land? Yes ^ No
2. If yes, does the project require preparation of an environmental document pursuant to the
requirements of the National or North Carolina Environmental Policy Act (NEPA/SEPA)?
Note: If you are not sure whether a NEPA/SEPA document is required, call the SEPA
coordinator at (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 ^
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
(Neuse), 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
(s uare feet) Multiplier Required
Miti ation
1 3 (2 for Catawba)
2 1.5
Total
" [,one 1 extends out 3U feet perpendicular iiom 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
Page 11 of 13
Restrictive Covenants
"The areas shown on the recorded plat (Oceanaire Estates, date, and
recording data) as Conservation Easement I and Conservation
Easement II shall be maintained in perpetuity in their natural or
mitigated condition. No person or entity shall perform any of the
following activities on such preservation area:
a) Fill, grade, excavate or perform any other land disturbing
activities
b) Cut, mow, burn, remove, or harm any vegetation
c) Construct or place any roads, trails, walkways, buildings,
mobile homes, signs, utility poles or towers, or any other
permanent or temporary structures.
d) Drain or otherwise disrupt or alter the hydrology or drainage
ways of the conservation area
e) Dump or store soil, trash, or other waste
~ Graze or water animals, or use for any agricultural or
horticultural purpose
This covenant is intended to ensure continued compliance with the
mitigation condition of a Clean Water Act authorization issued by the
United States of America, U. S. Army Corps of Engineers, Wilmington
District, Action ID, and therefore may be enforced by the United States
of America. This covenant is to run with the land, and shall be binding
on the owner, and all parties claiming under it. Property owners cannot
amend or modify these restrictive covenants without the express written
consent of the U. S. Army Corps of Engineers, Wilmington District."
T~ALTOl~~ EN~11~~EERIN
Oceanaire Coastal Wetaand Restoration Plan
Target:
d
Restore the wetland biological communities, soil conditions, and hydrology on .~ acres of
404 regulated wetlands that have been impacted, due to site activities, to a transitional
condition conducive to a probable recovery to a their original condition to the extent possible.
Restoration Area Benchmarks:
Reestablishment and maintenance of the water table within 12 inches of the soil surface for at
least 12% of the growing season.
Restoration of hydrophytic vegetation as defined as dominance of greater than 50% of species
with wetland indicator status wetter than FAC.
Site Location and Description:
Oceanaire is located 1.8 miles south of the intersection of Hwy 50 and Hwy 210, on Hwy 50
in the town of Surf City in Pender County. Oceanaire is a 6.56 acre planned low-density
(with no curb or gutter) residential development that drains into the Intercoastal Waterway
(stream classification- SA).
According to the published Soil Survey of Pender County, NC, the soils is mapped as
Newhan-Corolla complex.
Restoration Strategies:
Hydrologic Restoration
Soil structure will normally be restored over time by natural ecological processes. In order to
accelerate re-development of soil structure, restoration methods and equipment shall be
selected to minimize soil damage. The developer shall restore the disturbed 404 regulated
wetland areas to the pre-impacted surface grade. Restoring the pre-impacted grade should, in
turn, recreate the original topographic gradient. This should expedite the restoration of proper
hydrological characteristics of the pre-impacted site by creating the proper environment for
redox conditions to occur within the upper horizons of a hydric soil.
Filled wetland areas will be graded to the pre-impacted surface grade. Simple topographic
measurements from adjacent, non-impacted areas will suffice to set base elevations for the
necessary grading.
Tel: 910-259-4800 PO Box 895, Burgaw, North Carolina, 28425 Fax: 910-259-1779
T~ALTON ~NC~INE JRI1~~G
Original micro-topography shall be re-created to the extent possible. Ruts, stump holes and
any other mechanized disturbances shall be filled in and leveled, removing ea~treme field bed
or crowns using displaced soil. The re-graded surface shall be roughed over with a plow or
other equipment to re-create the micro-topography. Simple topographic measurements from
non-impacted areas will suffice to set base elevations for necessary grading. Silt fencing will
be added to protect the restored areas to prevent further disturbances and deposition of fill
material from erosion.
Vegetative Restoration
For typical dominant plant species in the adjacent unaffected coastal wetland areas see the
attached list.
The restored grade and stabilization of the impacted area should create the potential for soil
redox conditions that are conducive for the growth of the typical vegetation of the non-
impacted, adjacent wetlands. The shrub and herb strata shall be allowed to re-establish
voluntarily, due to the potential seed source being in close proximity to the restoration sites.
CoQStai Wetlands
Restoration
A2 = 17n~ sf
~odstal Wetlands
Restoration ,;, ~
Al =fib f ~, ~, ~~~ ~~, ~~
~ ~~~ ~~~
~~ r~- ~~
Level Spreader
Tel: 910-259-4800 PO Box 895, Burgaw, North Carolina; 28425 Fax: 910-259-1779
Wetlands -Get to Know Them
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Page 1 of 3
Contact DCM CAMA Counties Search
Coastal Wetlands :: Get to Know Them
While Section 404 of the federal Clean Water Act regulates all types of wetlands, including coastal wetlands,
North Carolina's Coastal Area Management Act (CAMA) provides additional protection to coastal wetlands.
CAMA defines a coastal wetland as any marsh subject to regular or occasional flooding by wind or lunar tides.
These marshlands must contain some, but not necessarily all, of 10 particular wetland plants discussed below.
For the most part, it's easy to identify coastal wetlands. They generally are located adjacent to salty water, such
as a sound or other brackish water body. They are characterized by marsh grasses and rarely contain trees.
Although other non-coastal wetlands may be located adjacent to coastal wetlands, non-coastal wetlands are not
typically flooded by salty or brackish waters and are usually characterized by stands of trees or taller brush.
Coastal wetlands can be identified by determining if some of the following 10 plant species are present in the
marsh land area:
1. Spartina altemiflora: Salt Marsh Cordgrass (Smooth Cordgrass)
Salt marsh cordgrass is the most common plant and prime indicator of a coastal wetland. It forms 1-foot- to 8-
foot-tall meadows that grow just up to the open water's edge. Lush and green in the warmer months, salt marsh
cordgrass becomes golden-brown in the fall and dies back in the winter. Salt marsh cordgrass is frequently
flooded.
2. Juncus roemerianus:
Black Needlerush
Black needlerush has tall (3 to 5 feet) needle-like blades in shades of
dark green or gray with sharp blackish tips. It grows in the higher areas
of the marsh, or where salt water completely covers the land only during
unusually high tides. In these higher elevations of the marsh, needlerush
replaces cordgrass as the most common plant species.
3. Salicornia spp.: Glasswort
Glasswort is found throughout the
marsh, mixed in with cordgrass or on the mud flats. Glasswort grows low
to the ground (rarely over 2 feet tall) and has short fleshy green stubby
spikes extending from a main stem. Glasswort looks like long green pipe
cleaners attached to a long stem. Three species are found in coastal
marshes, and one turns pink in the fall.
4. Distichlis spicata: Salt (or Saike
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Grass
Salt grass is a short, green, wiry
grass that lives among the salt meadow grass above the high tide line.
5. Limonium spp.: Sea Lavender
Sea Lavender grows at the fringe of the upper intertidal marsh. The plant
looks delicate, with long, skinny leaves that sprout small stems as they
grow upward. These stems are covered with tiny purplish-white flowers in the summer and fall.
http://dcm2.enr.state.nc.us/Wetlands/know.htm 8/23/2007
- Wetlands -Get to Know Them
7.Cladium jamaicense: Saw Grass
Saw grass grows to about 6 or 7 feet tall, with long, slender, narrow leaves
that look like tall blades of grass. These leaves are stiff and tough, with tiny
saw teeth around the edges. The top of saw grass has many branches and
branchlets.
Hay)
8. Typha spp.: Cattail
Page 2 of 3
6. Scirpus spp.: Bulrush
With its roots immersed in the
mud or water, the bulrush grows
into large, thick colonies. The
plants can reach up to 10 feet tall,
and the tops are crowned with
spikelets.
Cattails are easily recognizable by their flower spikes, or cat tails. Cattail
spikes can grow up to a foot long and are densely packed with tiny brown
flowers. The cattail plant can grow to 10 feet tall. Cattails also commonly
grow outside coastal wetlands along freshwater ponds, lakes, rivers and
ditches.
9. Spartina patens: Salt Meadow Grass (or
Salt meadow hay is a low- to medium-height perennial wire-like grass, 1-foot- to 3-
feet-tall. It forms dense mats of plants just above the high tide line.
10. Spartina cynosuroides: Salt Reed or Giant
Cordgrass
Salt reed is a member of the same family as salt marsh cordgrass, and they
have similar features. As its name might suggest, this grass grows taller (up
to 10 feet) and thicker than Spartina altemitlora.
Photos courtesy University of Florida, IFAS, Center for Aquatic Plants
http://dcm2. enr. state.nc. us/Wetlands/know. htm 8/23/2007
(Gainesville).