SW7070207_HISTORICAL FILE_20070430

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW_ 7QD%
DOC TYPE
❑ CURRENT PERMIT
❑ APPROVED PLANS
HISTORICAL FILE
COMPLIANCE EVALUATION INSPECTION
DOC DATE
'ge
YYYYMMDD

Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Richard Miller
R.C. Miller Group, LLC
P.O. Box 51
Aydlett, NC 27916
RE: Stormwater Management Permit Application #SW7070207
Colingwood Group Development
Dare County
Dear Mr. Miller:
Alan W. Klimek, P.E. Director
Division of Water Quality
April 30, 2007
This letter is in regard to the stormwater permit application received by this office on February 9, 2007
for the subject facility. Based on a preliminary review of the submitted plans and specifications along
with a site inspection, some items require additional information prior to review completion and permit
issuance. Please address the following:
Permit Application Form (SWU-101)
1. Receiving streams: As listed on SWU-101, page 2, item 6, drainage area 2 receiving stream
appears to be in error. Please correct the receiving stream and related information.
2. Total Project Area: The total project area, as listed in item SWU=101, page 2, item 6 and on the
plans, is 2.2 acres. SWU-I 01, item 3 and project narrative list 1.9 acres as the project area.
Please clarify.
3. Impervious Area: The project narrative states that the impermeable surfaces will be less than
30% overall and the plans list an overall impervious coverage of 27.7%. Item 6 should be
consistent with the narrative and plans. Please modify accordingly.
4. Initials: Please initial by hand those items listed in section VI.1.
Copies of SWU-101: Your application contained an original application form SWU-101. Please
include one copy in addition to the original. The copy will be returned to you, the permit holder,
along with a copy of the plans and the issued permit.
Supplement Forms (SWU-103) and Supporting Calculations
6. Soils: Under the soil report summary found on page 1 of each of the supplements,. please replace
"sand" with the soil types specified in the soils report.
North Carolina Division of Water Quality Washington Regional Office Phone [phone] FAX [phone]
Internet: h2o.ennstate.nc.us 943 Washington Square Mall, Washington, NC 27889
Customer Service
1-877-623-6748
An Equal Opportunity/Affirmative Action Employer— 50% Recycled/l 0%Post Consumer Paper
WAIICarolina
Naturally

Collingwood Group Development
Page 2
Basin Design: Please provide the required and provided basin storage volumes utilizing those
methods described in the Stormwater BMP Manual (http-//h2o enr state.nc us/su/PDF Files
/SW Documents/BMP Manual.PDF). Please employ the "Simple Method" as described by
Schueler (1987) and referenced in the BMP manual when calculating the design volume. An
example of the method is given on page 6 of section 4 of the manual. Please note also that
provided storage volume does not include volume beyond that at the level of the overflow.
Based on the above, the provided storage volume appears to be significantly less than three times
the required volume, as reported in the supplement and narrative.
By-pass: In accordance with T15A: 2H.1008 (d)(4), infiltration systems must be designed for
full by-pass. As indicated in your application, a system may not be required to provide full -
bypass when design volume significantly exceeds the required volume. Historically, significant
has been deemed as twice the required storage volume. Please demonstrate provided volume of
twice the required volume or incorporate full by-pass.
9. Initials: In Section III, the required items checklist should be initialed by the hand of the signing
authority.
10.. Operation and Maintenance: Sediment removal should be specified when sediment accumulates
to a level of 25% of the design depth. Please modify item IV A. accordingly.
11. Notary: The original signatures on page 3 should include notary certification.
Plans
12. Drainage Areas: Please clearly delineate both drainage areas on the plans.
13. Wetlands: As noted in the narrative and plan notes, 1870 ft2 of wetlands have been delineated on
site. Please include the wetlands on the full set of plans. Please also include a copy of the
referenced report by Coastal Area Permit Assistance and or submittals to the US Army Corp of
Engineers.
14. Fill: Please include notes regarding the amount and type of fill to be utilized on site.
15. Benchmark: Please locate the basin benchmarks on the plans.
Please provide an original and one copy of the application forms plus.two sets of signed and sealed
revised plan sheets, along with supporting documentation in addressing the above items.
The requested information must be submitted to this office within thirty days; that is prior to May 30,
2007. If you need additional time to submit this information, please mail or fax your request for a
time extension to this office at the letterhead address. Failure to do the above will result in the return
of your application as incomplete. Return of an incomplete application necessitates resubmittal of all
required items including the application fee.
Also, you should be aware that the Stormwater Rules require that the permit be issued prior to any
development activity. Construction without a permit is a violation of 15A NCAC 2H.1000 and North
Carolina General Statute 143-215.1 and may result in civil penalties of up to $10,000 per day.

Collingwood Group Development
Page 3
Please reference the application number on all correspondence. If you have any questions, feel free to
contact me at [phone].
Respectfully,
Treva L. Maxwell -Anderson
Environmental Engineer
Washington Regional Office
c: V/ Coastal Eng. & Surveying, Inc., Attn: Mitch Halloran
Dare County Planning / Inspections Office
Washington Regional Office

Dare County, North Carolina
17
wildlife. The native vegetation varies, depending on the
amount of exposure to salt spray. Saltmeadow
cordgrass and waxmyrtle are in areas affected by salt
spray. The areas at a greater distance from the ocean
spray support the less salt -tolerant grasses and sedges
as well as greenbrier, eastern baccharis, black willow,
redbay, three -square rush, cattail, sawgrass, blueberry,
wild olive, and Virginia creeper.
This soil is generally not used as cropland or
woodland because of exposure to salt spray, the hazard
of flooding, and the lack of adequate drainage outlets. It
generally is not used for urban or recreational
development because of wetness, the sandy texture,
and flooding.
The capability subclass is Vllw. No woodland
ordination symbol is assigned.
DuE-Dune land, 2 to 40 percent slopes. This
miscellaneous area consists of sand dunes on the
Outer Banks. The sand dunes are devoid of vegetative
cover and are subject to severe soil blowing and
shifting. They range in height from a few feet to more
than 100 feet. Some are elongated mounds, and others
are oval or crescent -shaped hills. The water table is at
a depth of more than 6 feet. Dune land is extremely
droughty.
Included in mapping are small areas of Newhan soils,
which have a vegetative cover on less than 15 percent
of the surface. .
The capability subclass is Vllle. No woodland
ordination symbol is assigned.
DwE—Dune land-Newhan complex, 2 to 40 percent
slopes. This map unit is on the Outer Banks. Most
areas lie parallel to the ocean. A typical area is about
60 percent Dune land and 35 percent.Newhan soil.
Areas are irregular in shape and range from 10 to 100
acres in size.
The Dune land is devoid of vegetation. It typically is
in the steeper areas. It consists of sandy material that is
subject to severe soil blowing and shifting with the wind.
Water moves very rapidly through the sand. The
capacity of the sand to hold water for plant growthis
very low.
The excessively drained Newhan soil supports salt -
tolerant vegetation, but plant -density varies. This soil is
in areas where slopes range from 2 to 30 percent.
Typically, the surface layer is light brownish gray fine
sand about 2 inches thick. The underlying material to a
depth of 80 inches is fine sand. It is light yellowish
brown in the upper part and very pile brown in the
lower part.
Permeability and the available water capacity are
very low in the Newhan soil. The soil is moderately acid
to mildly alkaline. It is exposed to varying amounts of
salt spray, depending on the proximity to the ocean.
The seasonal high water table is more than 6 feet
below the surface.
Included in mapping are Duckston and Corolla soils.
These included soils are in narrow depressions and
troughs between the foredunes. They make up about 5
percent of the map unit.
The Dune land and the Newhan soil are used mainly
as habitat for coastal wildlife and as open space. They
are not used as cropland or woodland because of
exposure to salt spray, extreme droughtiness, and very
rapid leaching of plant nutrients.
Windblown sand and the slope are the main
limitations affecting urban and recreational uses.
Structures and plants are likely to be either undermined
or covered by the sand. Plants also are subject to salt
spray. The Dune land and the Newhan soil should be
stabilized before they are used as homesites or
recreational areas. The Dune land can be stabilized
through a combination of structures and salt -tolerant
vegetation. Only the most drought -tolerant plants should
be used to stabilize these areas. American beachgrass,
panicgrass, and bitter panicum are suited to this
purpose. After the Dune land has been stabilized,
shrubs can be planted in areas protected from salt
spray. The adapted species are waxmyrtle, northern
bayberry, yaupon holly, and flameleaf sumac. The
shrubs provide a more permanent cover than the
grasses and also help to provide an environment in
which other native plants can become established.
The capability subclass assigned to the Newhan soil
is Vllls. No woodland ordination symbol is assigned to
this unit.
FrD—Fripp fine sand, 2 to 30 percent slopes. This
nearly level to steep, excessively drained soil is on
dune ridges on Roanoke Island and the sound side of
the Outer Banks. The soil generally is protected from
salt spray. Mapped areas are oblong and range from 5
to 1,000 acres in size.
Typically, the surface layer is grayish brown fine
sand about 4 inches thick. The underlying material to a
depth of 80 inches is fine sand. It is yellow in the upper
part and very pale brown in the lower part.
Permeability is rapid. The soil is strongly acid to
mildly alkaline throughout. The seasonal high water
table is more than 6 feet below the surface.
Included with this soil in mapping are small areas of
Conaby, Newhan, and Ousley soils. Conaby and Ousley
soils are in depressions and troughs. Newhan soils are
along the edges of the mapped areas. The included
soils make up about 10 percent of the map unit.
The Fripp soil supports a maritime forest of loblolly

18
pine, live oak; cherrybark oak, hickory, black cherry,
and eastern redcedar. The understory consists mainly
of American holly, waxmyrtle, yaupon holly, devilwood,
and muscadine grape. The sandy texture, droughtiness,
and the slope are the main limitations affecting
woodland.
This soil is not used as cropland because of
droughtiness and the rapid leaching of plant nutrients.
Moderately steep and steep slopes and seepage limit
the use of this soil for building site development and
sanitary facilities. Grading can create more favorabl&....
slopes for building, but it destroys the native vegetation
and causes severe soil blowing. Also; the duneridges::
should not be.graded because they provide protection
from ocean storms and improve .the -stability of the -
barrier islands. Soil blowing can, be controlled and.
stability increased by additional plantings of adapted'.
grasses and shrubs. The sandy texture and the
excessive slope are the main limitations affecting
recreational development.
The capability subclass is Vlls. Based on loblolly pine
as the indicator species, the woodland ordination
symbol is 6S.
HoA-Hobonny muck, 0 to 1 percent slopes,
frequently flooded. This nearly level, very poorly
drained soil generally is in marshes on Roanoke Island..
and the eastern shore of the mainland. It also is on the
sound side of the Outer Banks. Mapped areas are . :
irregular in shape and range from 10 to several hundred
acres in size.
Typically, the surface layer is very dark grayish
brown muck about 16 inches thick. Below this to a
depth of 72 inches is muck that is very dark grayish
brown in the upper part and dark gray in the lower part.
Permeability is moderate. The soil ranges from
extremely acid to strongly acid throughout the organic
layers. At least one of the organic layers is very
strongly acid or strongly acid. The mineral layers, if they
occur, are extremely acid to moderately acid: The
seasonal high water table is commonly at or slightly
above the surface. The soil is frequently flooded.for
very long periods.
Included with this soil in mapping are scattered areas
of Currituck soils, which have sandy sediments at a
depth of 16 to 51 inches. These soils are in landscape
positions similar to those of the Hobonny soil. They
make up about 10 percent of the map unit.
Most of the acreage of the Hobonny soil supports
natural vegetation and is used as habitat for wildlife.
The natural vegetation is primarily black needlerush, big
cordgrass, maidencane, sawgrass, and cattail (fig. 4).
This soil is not used for cropland, woodland, or urban
or recreational development because of excessive
Soil Survey
wetness, flooding, excess humus, low strength, and
exposure to salt water.
The capability subclass is Vllw. No woodland
ordination symbol is assigned. ..
HyA=Hyde loam, 0 to 2 percent slopes, rarely
flooded: -This nearly level, very poorly drained soil is on
broad flats on the mainland. It is mainly in the central
part of.the county, around; East Lake Community.
Mapped areas are irregular in'shape and range from 50
to 500'acies in size
Typically; the surface layer is 13 inches thick. It is
blackaoam irn the upper part and very dark gray loam in
the lower part: The subsoil is clay loam about 27 inches
thick. It grayish brown in the -upper part and dark
grayish brown in the lower part, The upper part of the
underlying material is gray fine sandy loam. The lower
part to a depth of 70 inches is light brownish gray loamy
fine sand.'
The organic matter content in the surface layer is
high. Permeability is moderately slow. The soil is
extremely acid to neutral. The seasonal high water table
is aVor near the surface. This soil is subject to rare
flooding.
Included with this soil in mapping are small areas of
the"clayey Cape Fear soils and the organic Ponzer soils
and small'areas of Roper soils, which have an organic
surface layer. The included soils are mostly in
landscape positions similar to those of the Hyde soil.
They are near the outer edge of the mapped areas.
They make up about 10 percent of the map unit
The Hyde soil is used mainly as woodland. In places
it is used as cropland.
In cultivated areas the principal crops are corn, small .
grain, and soybeans. Wetness and flooding are the
main limitations. Conservation tillage, cover crops, and
a cropping system that includes grasses and legumes
help to maintain tilth and crop production. Spring tillage
and fall harvest can be delayed because of wetness. A
scarcity of suitable outlets and the moderately slow
permeability limit the installation of drainage systems.
In areas of woodland, loblolly pine, red maple, green
ash, sweetgum, elm, pond pine, water oak, and willow
oak are the dominant species. The understory includes
mainly American holly, sweetbay, sourwood, reeds, and
southern waxmyrtle. Wetness and flooding are the main
limitations affecting woodland. Installation of a drainage
system and bedding of rows help to overcome the
excessive wetness. Using standard wheeled and
tracked equipment when the soil is wet results in deep
ruts, compacts the soil, and damages the roots of trees.
The use of equipment should be limited to dry periods
from midsummer through early fall, when the water
table is lowest.

Dare County, North Carolina
OsA=Osier fine sand, 0 to 2 percent slopes, rarely
flooded. This nearly level, poorly drained soil is on low
flats along the edge of freshwater marshes and in small
depressions on the sound side of the Outer Banks. The
soil is dominantly out of the salt -spray zone, and it
supports trees. Areas are irregular in shape and range
from 5 to 75 acres in size.
Typically, the surface layer is very dark grayish
brown fine sand 3 inches thick. The underlying material
to a depth of 80 inches is fine sand. It is light brownish
gray in the upper part and gray in the lower part.
Permeability is very rapid. The soil ranges from
extremely acid to moderately acid. The seasonal high
water table is at or near the surface. This soil is subject
to rare flooding for brief periods. It generally is
protected from salt spray and windblown sand.
Included with this soil in mapping are small areas of
Conaby, Duckston, and Ousley soils. Conaby and .
Duckston soils are in troughs and depressions. Ousley
soils are on small knolls. The included soils make up
about 10 percent of the map unit.
The Osier soil is used mainly as woodland. Loblolly
pine and water oak are the dominant species, but
sweetgum,'red maple, and blackgum also grow on this
soil. The most common understory plants are redbay,
greenbrier, and waxmyrtle. Wetness and flooding are
the main limitations affecting woodland. .
The Osier soil in Dare County is not used for
agricultural purposes because of wetness and flooding.
The main limitations affecting urban and recreational
uses are wetness, flooding, and the sandy texture. The
wetness can be reduced by installation of perforated
drain tile, drainage ditches, or a combination of the two
systems.
The capability subclass is Vw. Based on loblolly pine
as the indicator species, the woodland ordination
symbol is 9W.
OuB-Ousley fine sand, 0 to 5 percent slopes,
rarely flooded. This moderately well drained soil is on
low dunes near the sound side of the Outer Banks. It is
farther away from the ocean and out of the main salt -
spray zone. Areas are irregular in shape and range
from 5.to.135 acres in size.
. Typically, the surface layer is grayish. brown fine
sand about 3 inches thick. The underlying material to a
depth of 80 inches is fine sand. It is yellowish brown
and light olive brown in the upper part, dark grayish
brown in the.next part, and dark gray in the lower part.
Permeability is rapid. The soil is very strongly acid or
strongly acid. The seasonal high water table is 1.5 to
3.0 feet below the surface. This soil is subject to rare
flooding during hurricanes or exceptionally strong wind
tides.
23
Included with this soil in mapping are small areas of
Conaby, Corolla, and Osier soils. Conaby and Osier
soils are in the wetter troughs and depressional areas.
The nearly level Corolla soils are on the slightly higher,
nearly level parts of the landscape. The included soils
make up about 10 percent of the map unit.
The Ousley soil is used mainly as woodland. Loblolly
pine, live oak, water oak, and sweetgum are the
dominant species. The most common understory plants
are waxmyrtle, grapevine, persimmon, yaupon holly,
Virginia creeper, and blueberry. Wetness is the main
limitation affecting woodland.
This soil generally is not used as cropland, mainly
because of its location on the Outer Banks and the
wetness.
The main limitations affecting urban and recreational
uses are wetness, flooding, seepage, and the sandy
texture. The wetness can be reduced by installation of
perforated drain tile, drainage ditches, or a combination
of the two systems.
The capability subclass is Illw. Based an loblolly pine
as the indicator species, the woodland ordination
symbol is 8W.
PoA—Ponzer muck, 0 to 2 percent slopes; rarely
flooded. This nearly level, very poorly drained soil is
predominantly on.broad flats on the mainland. Small
areas; however, are on Roanoke Island. Mapped_ areas
are irregular in shape and range from 10 to 100 acres
in size.
Typically, the surface layer is black muck about 11
inches thick. Below this to a depth of 24 inches is very
dark brown muck. The upper part of the.underlying
material is dark grayish brown loam, the next part is
grayish brown loam, and the lower part to a depth of 72
inches is gray clay loam..
The surface. layer is highly decomposed organic
material. Permeability is slow to moderate. The organic
layers are extremely acid unless limed. The underlying
mineral layers range from extremely acid to mildly
alkaline. Logs, stumps, and fragments of wood are in
some areas. The seasonal high water table is at or. near,
the surface. This soil. is subject to rare flooding.
Included with this soil in mapping are scattered small
areas of Belhaven and Pungo soils. The included soils
are in landscape positions similar to those of the
Ponzer soil. They make up about 10 percent of the map
unit.
The Ponzer soil is used mainly as woodland. The
dominant native species are loblolly pine, pond pine,
red maple, sweetbay, and Altantic white cedar. The
understory includes loblolly pine, sweetbay, sweet
gallberry; bitter gallberry, sweet pepperbush, fetterbush
lyonia, waxmyrtle, and switchcane. Wetness, flooding,

M.
Soil
TABLE 16.--PHYSICAL AND CHEMICAL PROPERTIES OF THE SOILS
(The symbol < means less than; >'means more than. Entries under "Erosion factors--T" apply to the entire
profile. Entries under "Organic matter" apply only to the surface layer. Absence of an entry indicates
that'data were not available or were not estimated)
I I I I I I I I Erosion I
Soil -name and IDepthl Clay I Moist' (Permeability IAvailablel Soil (Shrink -swell I factors I Organic
map symbol I I. I bulk i I water Ireactionl potential I I I matter
1 I I density I (capacity I I I K I T I
I In I Pet I _g/cc I In/hr I -In/in I PH I- I
BaC -------------- 1 0-321 0-8 11.60-1.751 6.0-20 10.02-0.0614.5-6.5 ILOw---------- 10.101 5
Baymeade 132-461 8-26 11.45-1-.601 2.0-6.0 10.10-0.1414.5-6.5 (Low ---------- 10.101
146-801 0-12 11.60-1.751 6.0-20 10.02-0.1014.5-6.5 (Low ---------- 10.101
BeA*.
.Beaches
I II I i I I I I
BnD*:I I I
Beaches.
Newhan ---------- 1 0-801 <5 11.60-1.751 >20 1 .<0.05 15.6-7.8 ILow---------- 10.101 5
1 1 1 1 1 1 1 1 11
-BVA--------------- 1 0-381 --- 10.40-0.651 0.2-6.0 10.20-0.261. <4.5 (Low---------- I---- I ---
Belhaven 138-471 5-15 11.45-1.651 2.0-6.0 10.10-0.2413.6-5.5 Low ---------- 10.241
147-721 10-35 11.30-1.451 0.2-0.6 10.12-0.2013.6-6.5 ILow---------- 10.241
CaA-------------- 1 0-131 5-15 11.30-1.501 0.6-6.0 10.15-0.2214.5-6.5 (Low ---------- 10.1515
.Cape Pear - 113-481 35-60 11.25-1.401 '0.06-0.2 10.12-0.2213.6-6.0. (Moderate ----- 10.321
148-721 5-3011.40-1._701 ---I --- I -- I ------------- I ---- I
I I I I . I I I I I
CeA-------------- I 0-801 5-12 I1.45-1.601 >6.0 ID.D2-0.1015.6-8.4 ILow---------- 10.151 5
Carteret I I I I I I. - I- I I
I I .I I I I- I I I
CnA-------------- 1 0-141 --- 10.40-0.651 0.2-2.0 10.20-0.2613.6-5.5 (Low----------I----I---
Conaby 114-601 5-12 11.60-1.751 2.0-6.D 10.04-0.1013.675.5 (Low ---------- 10.101
I I I I I I I I I
COB -------------- 1 0-751 0-3 11.60-1.701 >20 10.01-0.0315.6-7.8 (Low ---------- 10.101 5
Corolla -
-
CrB*:.
Corolla --------- 1.0-751 0-3 11.60-1.701. >20 10.01-0.0315.6-7.8 ILow---------- 10.10) 5
Duckston -------- 1 0-8 1 0-4 11.60-1.701 >20. 10.02-0.0813.6-8.4 ILow------ ---- 10.101 5
1 8-B01 0-4 11.60-1.701 >20 10.02-0.0513.6-8.4 (Low ---------- 10.101
I I I I I' .I
CUA-------------- 1 0-171 10.25-0.401 0.6-6.0 10.25-0.3514.5-5.5 (Low ---------- I ---- 1 2
Currituck 117-401 --- 10.35-0.551 0.6-6.0 10.25-0.3513.6-5.5 ILow---------- I ---- 1
140-651 3-10 11.60-1.751 6.0-20 .10.04-0.0913.6-5.5- ILow---------- I ---- I
I . I I 'I I - I I . I 1
-DtA--------------- 1 0-8 1 0-4 11.60-1.701 >20 10.02-0.0813.6-8.4 ILow---------- 10.101 5
Duckston 1 8-801 0-4 11.6D-1.701 >20 10.02-0.0513.6-8.4 ILow---------- 10.101
I i I I I I I I I I
DUE* ------------- ,1 0-601 0-1 - 1 --- 1 >20 10.03-0.041 --- (Low ---------- 10.101 5 1
Dune land I
DwE*:
Dune land ------- 1 0-601 0-1 1 --- I >20 10.03-0.041 --- ILOw---------- 10.101 5 1
1 1 1 1 1 1 1 1 1 1 1
Newhan ---------- 1 0-801 <5 11.60-1.751 >20 1 "<0.05 15.6-7.8 -(Low ---------- 10.101 5 1
1 1 1 1 1 1 1 1 1 1
FrD -------------- 1 0-4 1 <5 11.30-1.701 6.0-20 10.02-0.0815.1-7.8 ILow---------- 10.101 5 1
Fripp 1 4-801 <5 11.30-1.701 6.0-20 10.01-0.0315.6-7.6 ILow---------- 10.101 1
I 1 1. 1 1 1 1 1 1 1
HoA-------------- j 0-161 --- 10.PD-0.651 0.6-6.0 10.20-0.2514.5-5.5 ILOw---------- I ---- I --- I
Hobonny 116-721 --- 10.46-0.701 0.6-2.0 10.20-0.2513.6-5.5 (Low ---------- 10.151 - 1
See footnote at end of table.
<.5
20-95
20-6D
<.5
<.1
<1
20-60.

Dare County, North Carolina.
TABLE 16.--PHySICAL AND CHEMICAL PROPERTIES OFTHE SOILS -Continued
map symbol r- I piny I . Moist
(Permeability (Available) Soil (Shrik-swe 11 I Erasion I
n
bulk
I density
1
I factors
I water Ireactionl potential I I
I Organic'
I In I-
Pat
Icapacity I I I K I T
I matter
I
-
g/ec
._ I
In/hr In/Sn I H
P I
HYA-------------- I 0-131
Hyde
5-18 1.
- 11.30-1.401
0.6-2
- I
I
.0 10.13-0.2013.6-5.5
Pct
--
I
113-401
140-701
18-35 IS.30-1.401
___ ___
0.2-0.6
IL -----------
10.15-0.2013.6-5.5 (Low------____10.171 5
3-10
1
___
.I ___ Io.431..
___
I
IcA______________1 0-121
Ica is
133-721
5-25 1 I
11.30-1.401
18-35 11.95-1.55
0.6-6.0
I ------------- I____I
I I
0.12-0.1813'. 6-5 .5 (Lew------____f0
I .
133-721
"2-10 (1.40-1.651
0.6-2.0
2.0-6.0
•17j 5
.10.14-0.2013.6-5.5 (Low-----_____ 10.281'
I 3-15
ToA-______-___ 1. 1
1
10.02-0.0513.E-5 .5 (Law------ ___ 10.171
1
1
I
---I 0-261
Sahns 113-261
4-12 11.60-1.751
19-35
2.0-6.0
I I (
10.06-0.1119 -5.5
1 '
126-721
2-35 11.40-1.601
[1.60-1.701
0.6-2.0
6.0-20
.5 (Low ----------
10.12-0.1514.5-5.5 (Law------___-10.241 5
241
,5-2
LeA----_-___ -_ I 1
I
10.03-0.0614.5-5.5 (Law-----_____10
10.101
I
('
Leon 'I 0-231
123-721
1-6 11.30-1.551
1-6 11.30-1.65,1
6.0-20
6.0-20
10.05-0.1013.6-5.5 ILow---------- 10.101
123-72
2-8 11.35-1.701
0.6-6.0
5
10.02-0.0513.6-5.5 ILow---------- 10.101
.5-4
Net -------- I I
'----
I I
10.10-0.2013.6-5.5 (Low------_ ---10 .15I
I
0-B01
Newhan ( I
<5 11.60-1.751
>20
_
I
1 <0.05 1 1 1 1
15.6-7.8 I'Lcw__________ 10.101
1
.
5
( <'.5
NhC*:
Newhan---------- I 0-801
<5 I1. 60-1. 751
I
> 20
1. <0.05
( '
Corolla------_ 0-751
0-3 . I1.'60-1.701
15.6-7.8 (Low-------__ 10.101 5.
I I ( -I
I <.5
i
>20
I
10.01-0.0315.E-7.a ILow
(
'1
---------- 10.10 5
I
Newhan- --------i o-eol
<s 11:60-1.751'
>20
I. i -i 1 I
'
I
'. Urban land. �.. I ( . .
1'. (
1.
- ..;
I:'. <0.05I5. 6-7.8 (Low__________ 10.101 5 I.
I,'.. ( ( I I
1
<.5 .
05A______________
Osier I p-3 1
1-10 11.35-1. 601
6.0-20
I
I I I(
10.03-0.1013.6-6.0.
13-801
2-5 11.40-1.601
>20
(Low ---------- 10.10, 5 1
" 0UB -------------- ( I
( I
10.02-0.0513.6-6.0 ILow------____ 10.051 1
2-5
Ousley 1 0-3 1
13-801
1-3 11.35-1.451
1-2 11.45-1.601
6.0-20
6.0-20
1 1 I
10.05-0.1014.5-5.5 (Low ------____I - I I
PaA___________
( 1
(0'. 02-0.0614.5-5.5 IL ------------ 5, .1
10.151
<,5
10-241
P Dozer 124-571
5-25 11.40-1.651 0.06-2.0
11.30-1.60j
I I I.
10.35-0.451 <9.5 (Law ------____I_' I I
-
0.2-2.0
157-721 --- 1 ___
(0.10-0.2413.E4.5 .1Low---------- 10.291-_- P
I
20-8'0 .
(
I
_ ILow____-____- I.
Psamments
PuA___- _-_-___-._.__:___ I 0-1
I
I
110-651
1I 0.35-O.fi0I 1Pu4o. 0-2-6
6.0
1 II
1I 0.20-0.26I 1I
<4.510.35-0.601 Mow ----------
'
35-60
.
..1 0.2-6.0
.2
III ----1
I165-721
10.20-0.261 <4.5 (Low------____1____1
40-90
I
10-131
I (
10.12-0.1813.E-7.3 Moderate--10.291Apo----------'___I
(
.---
---
Roper 113=181 -35
10.40-0.651 0.2-6.0
10.2Q-0.9fi13.6-S.S.(1.30-1.401 ILoa---------- '
02-0.6
18-3511.30-1.401 0.2-0.6
1----11
.-.2413.6-5.5 ILow---------- 10.431134-721
20-501-1
---
10.16-0.2413.6-7.8 Low-----___-_10.431I I
I
13.6-7.8 1
_____________(--I( I.
I
..
r See description of .the
map unit for composition and
I
behavior characteristics
-
of the map unit.

MapQuest: Maps
Page 1 of 1
Kill Devil Hills NC
Us
Notes:
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This map is informational only. No representation is made or warranty given as to its content. User assumes all
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http://www.mapquest.com/maps/print.adp?mapdata=5u7zQrYT8FC 1 JN2cxtKNbttJOQO1... 4/25/2007

1
Coastal
NCDENR
DWQ
Washington Regional Office
934 Washington Square
Washington, NC 27889
& SURVEYING, INC.
RE: Stormwater Mang. Permit Application #S W7070207
Colingwood Group Development
Dear Treva Maxwell -Anderson:
5/22/07
MAY 2 5 2007
Thank you for your stormwater review and comments letter dated 30 April 2007
regarding the Colingwood Group Development. As per you request for additional
information and specifications, the Stormwater Management Plans and Stonnwater
Calculations have been revised and are enclosed.
The following pertains to your comment list and how the comments were addressed and
where the addressed changes or revisions occur.
Permit Application Form (swu-101):
1) Receiving stream classification has been revised on sheet 2, item #6 for drainage
area #2.
2) Total project area after acquiring additional property is 2.19 acres and is reflective
of that area in the stormwater narrative, on the plans and on the swu-101 form.
3) Impervious area number has been changed in the stormwater narrative and on the
swu-101 form, pg. 2, item number 4 to reflect the 27.7% coverage.
4) All hand scribe initials are present on both the swu-101 & swu-103 forms.
5) Two (2) swu-101 forms with original signatures are enclosed_.
Supplement Forms (swu-103) and supporting calculations:
6) Soil Classification has been revised to read "SANDY LOAM" on both enclosed
swu-103 forms.
7) Two sheets are enclosed with volume calculations for each basin using the simple
method technique.
8) Per the aforementioned volume cale's, each basin has more that 2-times the
required storage and therefore no by-pass device is required or proposed.
9) All hand scribe initials are present on both the swu-101 & swu-103 forms.
P.O. Box 1129 • 934 W. Kitty Hawk Rd. * Kitty Hawk, NC 27949 • [phone] • Fax. [phone]

10) Sediment accumulate calc's have been revised on both swu-103 forms for each
proposed basin as per the 25% design depth.
11) Notary has signed and stamped both swu-103 forms for each proposed basin.
Plans:
12) Drainage areas are delineated on the I Ix17 inch post development drainage plan
in the drainage report. The areas are in color and easily distinguished.
13) Wetlands report, plan and letter of correspondence is enclosed. The ACE has still
not signed off on the fill permit as there is still a moratorium in effect on filling
wetlands per Coastal Area Permit Assistance. Being that the pocket of wetlands
is small and isolated and is that of just vegetation, it is very probable that we will
get this permit but until the moratorium is lifted, no permits will be issued. For a
more in-depth clarification on this matter please call Dennis Hawthorne,
owner/operator of Coastal Area Permit Assistance at 252 599 1040.
14) A soil backfill note is provided on the plan specifying soil type and
characteristics.
15) A site benchmark is scheduled to be set at elevation 10.00 in the existing oak tree
which is marked to remain at the southeast corner of recombined lot 14 and as
delineated on the plans.
Enclosed in the package being sent to you will be the signed original applications and 2
sets of the plans signed and sealed along with the revised version of the stormwater
calculations and enclosed plans which is also signed and sealed.
It is the intent that the additional information Coastal, Engineering & Surveying, Inc
submits will supersede the original documents and that part of the original package which
has not been changed or modified will still be an integral part of this submission and
should be used in conjunction with the updated material.
If you should have questions, comments or concerns please do not hesitate to call me as
soon as possible as we are most eager to expedite the review process any we can.
It has been a pleasure discussing the project with you and I really appreciate you patents
and courtesy. I look forward to talking with you in the future.
Sincerely
o,Q
Mitch Halloran
Project Manager

SW 70^/0.2- D % F on- `(ice,
FINANCIAL RESPONSIBILITY/OWNERSHIP FORM
SEDIMENTATION POLLUTION CONTROL ACT
No person may initiate any land -disturbing activity on one or more acres as covered by the Act before this
form and an acceptable erosion and sedimentation control plan have been completed and approved by the
Land Quality Section, N.C. Department of Environment and Natural Resources. (Please type or print and, if
the question is not applicable or the e-mail and/or fax information unavailable, place N/A in the blank.)
Part A.
1. Project Name Colinmwood Group Development
FEB 14 2007
2. Location of land -disturbing activity: County Dare City or Township Atlantic TwsD. ®tAyVQ-WAR(
Highway/Street Colinawood Lane Latitude 036°00'26.70"N Longitude 075042'24.50"W ��CC VV
3. Approximate date land -disturbing activity will commence: January 2007
4. Purpose of development (residential, commercial, industrial, institutional, etc.): residential
5. Total acreage disturbed or uncovered (including off -site borrow and waste areas): 3
6. Amount of fee enclosed: $ 150.00 . The application fee of $50.00 per acre (rounded
up to the next acre) is assessed without a ceiling amount (Example: a 9-acre application fee is $450).
7. Has an erosion and sediment control plan been filed? Yes No Enclosed X
8. Person to contact should erosion and sediment control issues arise during land -disturbing activity:
Name Mitchell Halloran E-mail Address Mitcht5CoastalES.com
Telephone [phone] Cell # [phone] Fax # [phone]
9. Landowner(s) of Record (attach accompanied page to list additional owners):
R.C. Miller Group, LLC
Name
P.O. Box 51
Current Mailing Address
A dv lett. NC
City State
[phone] [phone]
Telephone Fax Number
902 W. 3`° Street
Current Street Address
27916 Kill Devil Hills, NC 27948
Zip City State Zip
10. Deed Book No. 1690 Page No. 3 Provide a copy of the most current deed.
Part B.
Person(s), or firm(s) who are financially responsible for the land -disturbing activity (Provide a
comprehensive list of all responsible parties on an attached sheet):
R.C. Miller GrouD. LLC
Name
P.O. Box 51
Current Mailing Address
Avdlett, NC 27916
City State Zip
Telephone [phone]
Address
Fax Number [phone]
4lj':Liiti' 3EC2X9A8_
ill "'cGIONALZRICE

2. (a) If the Financially Responsible Party is not a resident of North Carolina, give name and street address
of the designated North Carolina Agent:
Name
Current Mailing Address
City State Zip
E-mail Address
Current Street Address
City State Zip
Telephone Fax Number
(b) If the Financially Responsible Party is a Partnership or other person engaging in business under an
assumed name, attach a copy of the Certificate of Assumed Name. If the Financially Responsible
Party is a Corporation, give name and street address of the Registered Agent:
Name of Registered Agent E-mail Address
Current Mailing Address Current Street Address
City State Zip City State Zip
Telephone Fax Number
The above information is true and correct to the best of my knowledge and belief and was provided
by me under oath (This form must be signed by the Financially Responsible Person if an individual
or his attorney -in -fact, or if not an individual, by an officer, director, partner, or registered agent with
the authority to execute instruments for the Financially Responsible. Person). I agree to provide
corrected information should there by any change in the information provided herein.
chard Miller President
print name Title or Authority
SignatOte Datel
I, �1 �' • ,9Ja Notary` Public of the County of l ,.A-Yd 1+1A
Statebf orth Carolina, hereby certify that �t lal'r-� I �} appeared
personally before me this day and being duly swom acknowledged that the above form was
executed by him.
Witness my hand"and`notarial seal,
this 2Q k,Vl of j �Ltn��tly �� 20 �-7
Noty
My commission expires

http://www. secretary. state. nc. us/Corporations/Corp. aspx?Piteml d=7...
North Carolina
Elaine F. Marshall DEPARTMENT OF THE
Secretary SECRETARY of STATE
Corporations
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PO Box 29622 Raleigh, NC 27626-0622 [phone]
Date: 2/12/2007
Click here to:
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7_Print apre-populated Annual Report Form I Annual Report
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Corporation Names
Name Name Type
INC RC Miller Group, Legal
LLC
Limited Liability Company Information
SOSID:
Status:
Date Formed
Citizenship:
State of Inc.:
Duration:
Registered Agent
Agent Name:
Registered Office
Address:
Registered Mailing
Address:
Principal Office
Address:
Principal Mailing
Address:
0804085
Current -Active
9/22/2005
Domestic
NC
Perpetual
Miller, Richard C., Sr.
139 Sandy Lane
Aydlett NC 27916
P.O. Box 51
Aydlett NC 27916
139 Sandy Lane
Aydlett NC 27916
P.O. Box 51
Aydlett NC 27916
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North Carolina Secretary of State
Page 1 of 1
North Carolina
Elaine E Marshall DEPARTMENT OF THE
Secretary SECRETARYOFSTATE
CORPORATIONS
Corporations Home
Search By Corporate Name
Search For New Corporation
Search By Registered Agent
Important Notice
Corporations FAQ
Tobacco Manufacturers
Dissolution Reports
Non -Profit Reports
Verify Certification
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2001 Bill Summaries
1999 Senate Bills
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Report I
Corporation Names
rName Name Type
NC R C Miller Group, LLC Legal
Limited Liability Company Information
SOSID:
0804085
Status:
Current -Active
Date Formed:
9/22/2005
Citizenship:
Domestic
State of Inc.:
NC
Duration:
Perpetual
Registered Agent
Agent Name:
Registered Office Address:
Registered Mailing Address:
Principal Office Address
Principal Mailing Address:
Miller. Richard C.. Sr.
139 Sandy Lane
Aydlett NC 27916
P.O. Box 51
Aydlett INC 27916
139 Sandy Lane
Aydlett NC 27916
P.O. Box 51
Aydlett INC 27916
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http://www.secretary.state.nc.us/corporations/Corp.aspx?Pitcmld=7825831 7/6/2007

TO : Mitch Halloran, Project Manager, Coastal Engineering & Surveying, Inc.
SUBJECT : Colingwood Group Development, Jurisdictional Welland Impacts
DATE: February 14, 2007
This correspondence concerns anticipated wetland impacts at the above referenced site at Colingwood Lane & Colington
Road in Dare County.
Currently, I am in the process of obtaining an official wetland jurisdictional determination from the U. S. Army Corps of
Engineers (USACE) concerning this site. Due to a current Supreme Court Case as you are aware, the Wilmington District
Office of the USACE is still currently under a moratorium of completing official Jurisdictional Determinations (JD's) for
isolated wetland areas that do not abut or are adjacent to Section 10 Waters. In the interest of completing the storm water
planning & permitting process, it is hoped that the following information will assist your office with the NCDWQ Stormwater
review of this site until an official USACE JD has been made & can be provided to you. As you are aware, the USACE
has been under this moratorium since mid June 2006. This moratorium has created a significant hardship for the property
owners & in the interest of time, it is hoped this information will assist in the proposed subdivision & stormwater permit
review.
The USACE has been on site & has given a "verbal" approval of the wetlands as depicted on the plat dated
June 13, 2006, CAD File P497- Wetlands. On June 22, 2006 the USACE Regulatory Specialist Tom Steffens accepted a
copy of the Welland Data Report prepared,by me for this site. This report shows that 1,870 sf (0.043 A,) of USACE
jurisdictional wetlands are present on the site. This report included copies of the above referenced plat to be signed by
the USACE.
The 1.91 acre site previously consisted of two parcels, of which a portion of one has been re -combined as part of the
current subdivision proposal. An existing ditch runs west to east along the back property line of the site. The wetlands
delineated are located at the eastern end of this ditch & consist of predominately plant species routinely located along
ditch areas including Pinus taeda (Loblolly Pine), Liquidambar styraciflua (Sweet Gum), Salix caroliniana (Coastal Plain
Willow), & Typha latifolia (Cattail).
As a reference, if this correspondence is provided to another party, it is requested that you include a copy of the above
referenced plat for this project, showing the wetland areas as verbally recognized by the USACE on June 22, 2006.
As referenced above, it not known at this time when an official JD from the USACE will be received. Once I do receive
notification, I will provide you with this information at my earliest opportunity. If you need additional information, please
call me at 25r-599-1040.
Denis. Hawthorn
Coastal Area Permit Assistance
cc: 0. M. Management, LLC
Richard Miller
CoantaL Area Permit 4b Ll tame
CAMA E \VatLanA Area Permit Aasbtanca. CnvironmantaL 4 ax manta.\Vatl and DaUnaatiorm
4-IaLping Property Ownera, Managa Davatopmant Mth Caaatal Conearvation In Mind
252. 599. 1040 / 252.441 .1555

{I/�. T.iiaz d 252 5�:. c� ©
�� : 1JS (tLiL J(iil?�13�C�34f�/k(, 0r't�Zg'�trJhii�h
Plats: 3 copies each, all have to be stamped and signed by a registered surveyor.
Data Sheets: Wetland and upland or either depending on scenario. ,
A copy of the Letter of Permission giving the Corps permission to enter the property.
This is very important for liability reasons on both the consultant and the Corps part.
A sheet of paper with the following info on it will greatly increase the processing time
and subsequent delivery of your signed plats.
Name and current address of property owner with contact telephone number`;i.''
Location and description of the property in question: street address, county,
nearest SR intersection, Block #, Lot #, etc. 2"!)u {?;;:UOG ; - /44 X Cr i
" 0 CO LI�I �-1 �t% j� !
A quad map or tax map indicating the property boundries.
Property PIN# 967ScIk*:�;S7;"7 J�
Coordinates: Lat/Lon, preferably'd'ecimal degrees to 6 places.
Who flagged it and the date/s it was flagged ba4 i J i S J 01, %NJ '
What day it was shown to the Corp representative:
Jv�iL= 22., 2006
6,22•06
`Co 1-1
R)Dn cz= vcxlG : S 9,-,-
Pmkscz - JOIF"(iJ2N -Cl-l-i 5
12� JiMMY 0DXT

ROUTINE WETLAND DETERMINATION .
(1987 COE Wetlands Determination Manual)
. DA3"d FcabkH
Project / Site: C
Applicant / Own
Investigator:
Date: 4 • l Z•
County: DlIye•
Do normal circumstances exist on the site? Yes No Community ID:
41
Is the site significantly disturbed (Atypical situation)? Yes No Tr. -insect ID: fI'
Is the area a potential problem area? Yes No ,c Plot ID:
(explain on reverse if needed)
VEGETATION
i
Dominant Plant species Stratum Indicator
1. P11J'US r7-t.-_0A . 6 /7 - ULY..
2. l /OI//QAr-1A¢2 577-V,7 6 (
'. $ GIYC�r 6faA i�7 /`fi(5'r1/ ?-
5. i91.L'Fi VIA 5CJl 41)1 ,VS V FZC i,y f-
3. TT 4 (ATitoL 4 f��'c o6U
7, CCI,'nU', 013k-
3.
Dominant Plant species Stratum Indicator
9.
10.
i
i
12.
13. .
14.
15.
16.
i
?ercent of Dominant Species that are OBL, FACW, or FAC excluding FAC-). 7 / Vo
remarks: tfyprZopPJTIC /1':Crl°E JS Pj)r11''AkrVG/Lo�%r�JC�✓G2—H 2r✓fZr_= v�
-IYDROLOGY
_ Recorded Data (Describe In Remarks):
_ Stream, Lake, or Tide Gauge
Aerial Photographs
Other
No Recorded Data Available
:field Observations:
Wetland Hydrology Indicators
Primary Indicators:
_ Inundated
Saturated in Upper 12"
_ Water Marks
_ Drift Lines .
_ Sediment Deposits
Drainage Patterns in Wetlands
(Depth of Surface Water. f (•) Secondary Indicators:
- Oxidized Roots Channels in Upper
Depth to Free Water in Pit: �i (in.) _ Water -Stained Leaves
a _ Local Soil Survey Data
Depth to Saturated Soil: 2 (in.) _ FAC-Neutral Test
Other (Explain in Remarks)
remarks: N+�O�R�Lr t'trft

F
Map Unit Name Fj"�0rig .;, G O4- LmIGv Ta `>i'i=��,
(Series and Phase): FP, p:p R , E -ti Drai age Cla sP007- c( �
Taxonomy (Subgroup), 9 n � p- , a s ; IConfirm Mapped Type? Yes_
Profile Description:
-
Depth
Matrix Colors Mottle Colors
Mottle
Texture,
(inches) Horizon
(Munsell Moist) (Munsell Moist)
Abundance/Contrast
Structure
i L'?T�
hFu�'�
C1?yuni
°
9
t fv- S
I�A1%4� (eqv
d
tea ffG Uf
rq�J
i
Syrvt—RA
��('
ail
,
Hydric Soil Indicators:
_ Histosol Concretions
_ Histic Epipedon High Organic Content in Surface Layer in
_ Sulfidic Odor Organic Streaking in Sandy Soils
_Aquic Moisture Regime ,Listed On Local Hydric Soils List — fM
Reducing Conditions Listed on National Hydric Soils List L
Gleyed or Law-Chroma.Colors -_Other(Explain in Remarks)
Remarks: �q ld :[' 4 •a< v-'a _ E.'blfi:9�
WETLAND DETERMINATION
Hydrophytic Vegetation Present? Yes , No— Is the Sampling Point ' 4
Wetland Hydrology Present? Yes ii No Within a Wetland? Yes�X Nb
Hydric Soils Present? Yes X . No
Remarks:
DkTA- PT t5 11A A '44i E,A4)—DE&'Q-Sii5CJU J r

ROUTINE WETLAND DETERMINATION .
(1987 COE Wetlands Determination Manual)
DA-117A F420 t
Protect / Site: ec-LI Date: (2. 200
Applicant /O� cr 71(l� (jQ f11L�I iL iLi�k)lOf '( ��'tl�C( � , C County: ip e•
State: f
Investigator: 171t il` `+11 ttF = r`i
Do normal circumstances exist on the site? Yes No Community ID: U
Is the site significantly disturbed (Atypical situation)? Yes No__f, Transect ID: /?
Is the area a potential problem area? Yes No Plot ID:
(explain on reverse if needed)
i
VEGETATION
Dominant Plant Species Stratum Indicator I Dominant Plant Species Stratum
7. Ni%I C+ ifVQ Fgg&
8. VALCtti!ur�t`ohs t16oSJ�l
ash-
I tJ
9. 1�0-AA N01/SMILA,/
10.'
CS a
A,--U
11.
r 5 s`l
P
12.
13.
FINcui 4-
14.
PAc
15.
s
1 At.v-
16.
Percent of Dominant Species that are OBL, FACW, or FAC excluding FAC-). �� �%>
Remarks: li D2api{� tEL '4jE(s ' ic.# 1 ` kk: 'c ,t : S't j f orst iAtl St "i w S r !,
HYDROLOGY
_ Recorded Data (Describe In Remarks)
_ Stream, Lake, or Tide Gauge
_ Aerial Photographs
Other
No Recorded Data Available
Field Observations:
Depth of Surface Water. a(u C (in.)
Depth to Free Water in Pit:"(
Depth to Saturated Soil:
Wetland Hydrology Indicators
Primary Indicators:
_ Inundated
_Saturated in Upper 12"
_ Water Marks
_ Drift Lines
_ Sediment Deposits
_ Drainage Patterns in Wetlands
Secondary Indicators:
_ Oxidized Roots Channels in Upper 1
_ Water -Stained Leaves
_ Local Soil Survey Data
_ FAC-Neutral Test
_ Other (Explain in Remarks)
Remarks: aEa . CF(�
go R� Ortu4S1L 1I aUt( u� � i

Map Unit Name����
(Series and Phase): t' 1 P Drainage Class: -
(l oItL LidC0:T1z-:9 Tt�.PL
Taxonomy (Subgroup)Confirm Mapped Type? Yes_ No
Profile Description:
Depth Matrix Colors Mottle Colors Mottle 'Texture, Concretions,
(inches) Horizon (Munseff Moist) (Munsell Moist) Abundance/Contrast Structure etc.
.3 1- 1'J'` V[k salt. r _ P01-111
B.e.iPn�aed .✓
i
ii �r-��n�I
4-6 i� s v jL *t D/iQfC [ALL('?J/F, i f'�r"�' /(1r,9 G!/ ;.✓T//dTF� iFr' '(aI
sqq
6- 1 DAW, r� ,,, WiTttRI! Scams NaCp7r�S h�? y —Grp,
6'0Yk 6/1
Hydric Soil Indicators:
_ Histosol Concretions
Epipedon _ High Organic Content in Surface Layer in Sandy So
Is
_Histic
Sulfidic Odor _Organic Streaking in Sandy Soiis
_Aquic Moisture Regime Listed On Local Hydric Soils List t4 I aCLwSS='
_ Reducing Conditions fisted on National Hydric Soils List Sil=(F'tiF
Gleyed or L ow-Chroma- Colors Other (Explain in Remarks) l*l
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Remarks:
I
i
WETLAND DETERMINATION
Hydrophytic Vegetation Present? Yes _ No Is the Sampling Point
Wetland Hydrology Present? Yes _ No N Within a Wetland? Yes_ No
Hydric Soils Present? Yes _ _ No
I
Remarks:
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Projection is UTM Zone 18 NAD83 Datum_-
http://www.topozone.comlprint.asp?z=18&n=3985136&e=436219&u=7&datum=nad83

June 20, 2006
Re: 0 Colington Rd & 117 Colingwood Ln
KDH, NC 27948
Pin# 987306375976 & 987306374829
The owners of the above referenced property have authorized Dennis Hawthom to act as
an agent in relations to obtaining the proper environmental permits for the above i
Property By signing below, the property owner also authorizes representatives of the
Army Corps of Engineers to visit the site.
At- mnter Uroup, LLC
Manager
961

NC
0
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Parcels
Rec PIN PARCEL ADDRESS I OWNERl JOWNER2FSUBDIVISIO
1 1987306375976 018767098 10 COLINGTON RD I CROW, TANYA TILLETT I 1COLINGWOOD
http://daregis.darenc.com/servledcom.esri.esrimap.Esrimap?ServiceName=lare&ClientV...

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STORMWATER MANAGEMENT REPORT
Prepared For
COLINGWOOD GROUP DEVELOPMENT
Located at intersection of
COLINGTON ROAD & COLINGWOOD LANE
DARE COUNTY - TOWN OF KILL DEVIL HILLS (OUTSIDE)
Prepared By:
COASTAL ENGINEERING & SURVEYING
29 January 2007
Rev: 22 May 2007

POST -DEVELOPMENT
STORMWA TER DRAINAGE PLAN
Prepared For
COL/NGWOOD GROUP DEVELOPMENT
Located at intersection of
COLINGTON ROAD & COLINGWOOD LANE
DARE COUNTY - TOWN OF KILL DEVIL HILLS (OUTSIDE)
Prepared By:
COASTAL ENGINEERING & SURVEYING
29 January 2007
Rev: 22 May 2007

CONTENTS
Narrative...........................................................................
Post -Development Stormwater Calculations
1.5" across site for Quality Management Storm Event
3.6" across site for 1 Year Storm Event
Percolation test results for infiltration rate
Design calculations for stormwater sewer outlet culvert
Design calculations for Swale discharge velocity
EXHIBITS / PLANS
Dare County Soil Characteristics and Soil Map No. 3...........
Plan To Accompany Stormwater Calculations Post -Development Conditions .....
I
Approved Date:
Pro ession6l EnE ineer

NARRATIVE
INTRODUCTION
This report presents stormwater management analysis calculations for the proposed construction
for Colingwood Group Development Site. This report illustrates storm water management
practices in accordance to The North Carolina Stormwater Best Management Practices.for a Dry
Infiltration Basin.
EXISTING SITE CONDITIONS
The project is situated outside the Town of Kill Devil Hills, Dare County, North Carolina and is
located approximately 3.6 miles west of (U.S. roue 158) Groatan Highway on Colington Road.
The property is bordered to the north by Colingwood Lane and to the east by Colington Road, to
the west by the residential subdivisions known as "Colington Harbor — Section X" and to the
south by the residential subdivision known as "Colingwood —Phase I"..
The property consists of two parcels, amounting to 2.19+1- acres, which currently is
undeveloped. The subject parcels were found to be located in FEMA Flood Zones "AE"per Map
Panel No. 375348 0114D, dated April 2, 1993.
Soil characteristics for the property are "FrD" (Fripp) and "OuB" (Ousley) per the Soil Survey
for Dare County. Soil characteristics show that the seasonal high water table is greater than 6
feet below existing ground elevations for the aforementioned soils but on -site soil test bore's and
monitoring well have found the seasonal high water table to be at approximately 3 feet below the
existing ground grade excluding areas where topographic elevations are ridged. Both on -site soil
classifications have infiltration rates typical for sandy soils and per Coastal Engineering's on -
site percolation tests conducted on December 19, 2006 Infiltration rates exceed 2-112" per
minute on average per 3 different tests per 3 on -site test holes at targeted locations pending
proposed BMP locations. The soil test borings resulted in soil data characteristics similarly
consistent with the Dare County Soil Survey and,for the purpose of storm water calculations, the
hydrologic soils group "B" was used for pre/post development analysis.
The northwesterly section of the subject site is predominately exposed sand with sporadic
vegetation with some shrubs, bushes and grass traversing to the center of the parcel. Most of the
parcel's perimeter excluding northwesterly lands along Colingwood Lane is thick with vegetation
especially the lands adjoining the right of way of Colington Road. This area is wooded with
mostly conifer trees and has a dense undergrowth ofshrubs, bushes, weeds and various grasses.
The subject parcel has various topographic features,from relatively flat areas in the middle of the
site to valleys and ridges in the southeasterly portion of the property. Some isolated pockets of
low areas which have been classified as 404 wetlands as delineated by Coastal Area Permit
Assistance in August of 2006, pending US.A.E. jurisdiction determination, are the areas where

stormwater is conveved to and collected at. These areas are on -site and on adjoining lands and
have no outlet to down slope stormwater conveyance, relying only on infiltration to relieve
stormwater surges.
PROPOSED SITE CONDITIONS
The Colingwood Group Development site improvements are 12 residential units of 960 sf each
with paved driveways able to park at least (2) vehicles and the proposed 20 ft. wide pave
roadway which is about 460 If long. The property shall be developed for an impervious
coverage of 27.7% and shall employ storm water management facilities which regulate post
development off -site storm water discharge to that of less than or equal to pre -development
storm water discharge. Proposed on -site infiltration basins will assist in regulating post -
development storm water off -site discharge management as well as provide stormwater quality
treatment as required by the State of'North Carolina.
The Colingwood Group Development will utilize grass swales, which will convey storm water
from impervious areas to (2) BMP Infiltration Basins. The quality management of storm water
will be by means of ground filtration through infiltration. The BMP Infiltration Basin will be
designed in compliance with the North Carolina Stormwater Best Management Practices and will
the requirements for 85% TSS Pollutant removal. To achieve the 85% TSS Pollutant removal
other BMP applications will assist the Infiltration Basin in water quality management. Grass
Swales and Grass Filter Strips will provide secondary BMP assistance in water quality.
Per North Carolina State BMP Infiltration Basin design regulations, stormwater events above
that of quality management shall be diverted away from infiltration basins, bypassing the BMP
and directed to the overflow devises but because the proposed infiltration basins are able to store
3 times the quality management quantity without releasing stormwater through overflow devices,
no diverted stormwater bypass devices are proposed. Quality management is designed to
manage a 1.5 (Type II 24-hr. rainfall) inch precipitation event across the proposed impervious
areas.
Stormwater Management for the Colingwood Group Development has been designed to reduce
the post development stormwater discharge flowsfrom the pre development flows. Per on -site
percolation test preformed by Coastal Engineering in December of 2006, infiltration rates are
approximately 60+ inches per hour. For design purposed a conservative safety factor restriction
on the tested infiltration rate is engaged, making the infiltration design rate for the proposed
BMP bfiltration Basin io be 30 inches per hour or 0.5 inches per minute.
The results of the calculations included in the Stormwater Management report prepared by
Coastal Engineering and Surveying, Inc., demonstrates that the proposed post development off -
site stormwater discharge is minimal and is significantly reduced from the pre -development off -
site stormwater discharge in all storm events.
(See chart for pre/post storm water discharge analysis)

Pre -Development
Off -Site Stormwater
Discharge
Post -Development
Off -Site Stormwater
Discharge
1-Year 0.24 C.F.S. 1-Year 0.00 C.F.S.
2-Year 0.52 C.F.S.
10-Year 1.72 C.F.S.
25-Year 2.42 C.F.S.
50-Year 3.24 C.F.S.
METHODOLOGY
2-Year 0.00 C.F.S.
10-Year 0.00 C.F.S.
25-Year 0.00 C.F.S.
50-Year 3.16 C.F.S.
The Storm Water calculations jor this project were performed using Hydrocad, a computer aided design
program for modeling stormwater runoff. This computer design program is based primarily on hydrology
techniques developed by the Soil Conservation Service (SCS) for Urban Hydrology for Small Watersheds
(TR-55) combined with standard hydraulic equations.
EROSIONAND SEDIMENT CONTROL
In order to effectively control erosion and sediment deposition it is important to provide the
necessary controls in the proper sequence of construction. Erosion and Sediment control
practices and installation details are depicted on the Erosion and Sediment Plan prepared by
Coastal Engineering, Inc. and consist of maintaining the perimeter controls throughout
construction. Perimeter protection (as required) will be in the form of silt fencing.

QUALITY MANAGEMENT STORMWATER CALCULATIONS
(1.5"Across Site)
Prepared For
COLINGWOOD GROUP DEVELOPMENT
Located at intersection of
COLINGTON ROAD & COLINGWOOD LANE
DARE COUNTY - TOWN OF KILL DEVIL HILLS (OUTSIDE)
Prepared By. -
COASTAL ENGINEERING & SURVEYING
29 January 2007
Rev: 22 May 2007

POST DEV REV 52107 Type 11 24-hr Rainfall= 1. 50" (Quality Mang. Event)
Prepared by COASTAL ENGINEERING & SURVEYING
HydroCAD® 6.00 s/n 000490 © 1986-2001 Applied Microcomputer Systems 5/22/2007
Subcatchment 1S: POST DEV
Runoff = 0.58 cfs @ 12.05 hrs, Volume= 0.038 of
Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-60.00 hrs, dt= 0.05 hrs
Type II 24-hr Rainfall=1.50"
Area (sf) CN
Y'IYV
11,520
VV
98
vlxVF 1 Ixlv"VvI l
PROP ROOFTOPS
10,918
98
PROP ROAD
41,664
68
PERVIOUS AREAS
68,842
80
Weighted Average
Tc Length S
Capacity Description
0.2
22
0.0680
1.9
Sheet Flow, OVER DRIVEWAY UNIT 3
Smooth surfaces n= 0.011 P2= 4.40"
0.7
23
0.0066
0.6
Shallow Concentrated Flow, IN R/W SWALE
Short Grass Pasture Kv= 7.0 fps
0.1
10
0.0070
1.7
Shallow Concentrated Flow, DRIVEWAY UNIT 2
Paved Kv= 20.3 fps
0.8 .
26
0.0063
0.6
Shallow Concentrated Flow, R/W SWALE
Short Grass Pasture Kv= 7.0 fps
0.2
40
0.0050
3.7
4.57 Circular Channel (pipe), 15" RCP CULVERT
Diam= 15.0" Area= 1.2 sf Perim= 3.9' r= 0.31' n= 0.013
1.2
29
0.0033
0.4
Shallow Concentrated Flow, R/W SWALE
Short Grass Pasture Kv= 7.0 fps
0.1
22
0.0050
3.7
4.57 Circular Channel (pipe), 15" RCP CULVERT
Diam= 15.0" Area= 1.2 sf Perim= 3.9' r- 0.31' n= 0.013
5.8
188
0.0060
0.5
Shallow Concentrated Flow, GRASS SWALE
Short Grass Pasture Kv= 7.0 fps
1.5
28
0.0020
0.3
Shallow Concentrated Flow, FILTER STRIP
Short Grass Pasture Kv= 7.0 fps

POST DEV REV 52107 Type // 24-hr Rainfall= 1. 50" (Quality Mang. Event)
Prepared by COASTAL ENGINEERING & SURVEYING
HydroCAD® 6.00 s/n 000490 © 1986-2001 Applied Microcomputer Systems 5/22/2007
T
w
U
O
M
Subcatchment 1S: POST DEV
Hydrograph Plot
Time (hours)
p Runoff

POST DEV REV 52107 Type 11 24-hr Rainfall= 1. 50" (Quality Mang. Event)
Prepared by COASTAL ENGINEERING & SURVEYING
HydroCADO 6.00 s/n 000490 © 1986-2001 Applied Microcomputer Systems 5/22/2007
Subcatchment 2S: POST DEV #2
Runoff = 0.00 cfs @ 12.89 hrs, Volume= 0.003 of
Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-60.00 hrs, dt= 0.05 hrs
Type II 24-hr Rainfall=1.50"
Area (sf) CN
Tc Length Slope Velocity Capacity Description
27.8 523 0.0020 0.3 Shallow Concentrated Flow, R/W SWALE
Short Grass Pasture Kv= 7.0 fps
0.2 46 0.0050 3.7 4.57 Circular Channel (pipe), 15" RCP CULVERT
Diam= 15.0" Area= 1.2 sf Perim= 3.9' r= 0.31' n= 0.013
4.9 185 0.0080 0.6 Shallow Concentrated Flow, R/W SWALE
Short Grass Pasture Kv= 7.0 fos
32.9 754 Total
Subcatchment 2S: POST DEV #2
Hydrograph Plot
Time (hours)
E Runoff

POST DEV REV 52107 Type 11 24-hr Rainfall= 1. 50" (Quality Mang. Event)
Prepared by COASTAL ENGINEERING & SURVEYING
HydroCAD@ 6.00 s/n 000490 @ 1986-2001 Applied Microcomputer Systems 5/22/2007
Pond 1P: BMP INFILTRATION BASIN #1
Inflow =
0.58 cfs @
12.05 hrs,
Volume=
0.038 of
Outflow =
0.48 cfs @
12.10 hrs,
Volume=
0.038 af, Atten= 16%,
Lag= 3.4 min
Discarded =
0.48 cfs @
12.10 hrs,
Volume=
0.038 of
Primary =
0.00 cfs @
5.00 hrs,
Volume=
0.000 of
Routing by Stor-Ind method, Time Span= 5.00-60.00
hrs, dt=
0.05 hrs
Peak Elev= 6.58'
Storage= 116 cf
Plug -Flow detention time= 4.0 min calculated for 0.038 of (100%
of inflow)
Storage and wetted areas determined by Irregular sections
Elevation
Surf.Area
Perim.
Inc.Store
Cum.Store
Wet.Area
(feet)
(sq-ft)
(feet)
(cubic -feet)
(cubic -feet)
(sq-ft)
6.50
0
0.0
0
0
0
7.00
4,236
273.0✓
706
706
5,931
8.00
5,108
297.0--
4,665
5,371
7,057
8.40
6,109
330.0
2,240
7,612✓
8,708
9.00
8,826
831.0
4,456
12,067
54,996
9.50
12,569
955.0
5,321
17,388
72,625
Discarded OutFlow (Free Discharge)
t-2=Exfiltration
Primary OutFlow (Free Discharge)
t-1=Broad-Crested Rectangular Weir
M
Invert Outlet
1 Primary 8.40' 13.0' long Broad -Crested Rectangular Weir
Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60
Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63
2 Discarded 0.00' 0.041667 fDm Exfiltration over entire Surface area

POST DEV REV 52107 Type /I 24-hr Rainfall= 1. 50" (Quality Mang. Event)
Prepared by COASTAL ENGINEERING & SURVEYING
HydroCADO 6.00 s/n 000490 © 1986-2001 Applied Microcomputer Systems 5/22/2007
LL
Pond 1 P: BMP INFILTRATION BASIN #1
Hydrograph Plot
Time (hours)
❑ Inflow
❑ Outflow
O Discarded
p Primary

POST DEV REV 52107 Type 11 24-hr Rainfall=1.50" (Quality Mang. Event)
Prepared by COASTAL ENGINEERING & SURVEYING
HydroCAD® 6.00 s/n 000490 © 1986-2001 Applied Microcomputer Systems 5/22/2007
Pond 2P: BMP INFILTRATION BASIN #2
Inflow =
0.00 cfs @
12.89 hrs, Volume=
0.003 of
Outflow =
0.00 cfs @
12.90 hrs, Volume=
0.003 af, Atten= 0%,
Lag= 0.9 min
Discarded =
0.00 cfs @
12.90 hrs, Volume=
0.003 of
Primary =
0.00 cfs @
5.00 hrs, Volume=
0.000 of
Routing by Stor-Ind
method, Time Span= 5.00-60.00 hrs, dt= 0.05 hrs
Peak Elev= 7.00'
Storage= 0 cf
Plug -Flow detention time= 0.8 min
calculated for 0.003 of (100% of inflow)
Storage and wetted areas determined by Irregular sections
Elevation
Surf.Area
Perim. Inc.Store
Cum.Store
Wet.Area
(feet)
(sq-ft)
(feet) (cubic -feet)
(cubic -feet)
(sq-ft)
7.00
0
0.0 0
0
0
7.10
891 '
159.0 30
30
2,012
7.30
1,134
604.0 202
232
29,031
7.45
3,700
935.0 344
576
69,569
Discarded OutFlow (Free Discharge)
L3=Exfiltration
Primary OutFlow (Free Discharge)
L1=Culvert
L2=Orifice/Grate
# Routing Invert Outlet Devices
1 Primary 4.70' 15.0" x 64.0' long Culvert Ke= 0.500
Outlet Invert= 4.54' S= 0.0025 '/' n= 0.012 Cc= 0.900
2 Device 1 7.40' 18.0" Horiz. Orifice/Grate Limited to weir flow C= 0.600
3 Discarded 0.00' 0.041670 fpm Exfiltration over entire Surface area

POST DEV REV 52107 Type // 24-hr Rainfall= 1.50" (Quality Mang. Event)
Prepared by COASTAL ENGINEERING & SURVEYING
HvdroCAD@ 6.00 s/n 000490 @ 1986-2001 ADDlied Microcomputer Svsterns 5/22/2007
KIM MIM
oil
3
4 16 18 20 22 24 26 28 30 32 34 36
Time (hours)

1 YEAR STORM EVENT STORMWATER CALCULATIONS
(3.6"Across Site)
Prepared For
COL/NGWOOD GROUP DEVELOPMENT
Located at intersection of
COLINGTON ROAD & COLINGWOOD LANE
DARE COUNTY - TOWN OF KILL DEVIL HILLS (OUTSIDE)
Prepared By. -
COASTAL ENGINEERING & SURVEYING
29 January 2007
Rev: 22 May 2007

POST DEV REV 52107 Type 11 24-hr Rainfall=3.60" (1 Year Storm Event)
Prepared by COASTAL ENGINEERING & SURVEYING
HydroCAD® 6.00 s/n 000490 © 1986-2001 Applied Microcomputer Systems 5/22/2007
Subcatchment 1S: POST DEV
Runoff = 4.02 cfs @ 12.03 hrs, Volume= 0.226 of
Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-60.00 hrs, dt= 0.05 hrs
Type II 24-hr Rainfall=3.60"
Area (sf)
CN
Description
4,740
98
PROP DRIVEWAY
11,520
98
PROP ROOFTOPS
10,918
98
PROP ROAD
41,664
68
PERVIOUS AREAS
68,842
80
Weighted Average
Tc
_ (min)
Length
(feet)
Slope
(ft/ft)
Velocity
(ft/sec)
Capacity
(cfs)
Description
0.2
22
0.0680
1.9
Sheet Flow, OVER DRIVEWAY UNIT 3
Smooth surfaces n= 0.011 P2= 4.40"
0.7
23
0.0066
0.6
Shallow Concentrated Flow, IN R/W SWALE
Short Grass Pasture Kv= 7.0 fps
0.1
10
0.0070
1.7
Shallow Concentrated Flow, DRIVEWAY UNIT 2
Paved Kv= 20.3 fps
0.8
26
0.0063
0.6
Shallow Concentrated Flow, R/W SWALE
Short Grass Pasture Kv= 7.0 fps
0.2
40
0.0050
3.7
4.57
Circular Channel (pipe), 15" RCP CULVERT
Diam= 15.0" Area= 1.2 sf Perim= 3.9' r= 0.31' n= 0.013
1.2
29
0.0033
0.4
Shallow Concentrated Flow, R/W SWALE
Short Grass Pasture Kv= 7.0 fps
0.1
22
0.0050
3.7
4.57
Circular Channel (pipe), 15" RCP CULVERT
Diam= 15.0" Area= 1.2 sf Perim= 3.9' r= 0.31' n= 0.013
5.8
188
0.0060
0.5
Shallow Concentrated Flow, GRASS SWALE
Short Grass Pasture Kv= 7.0 fps
1.5
28
0.0020
0.3
Shallow Concentrated Flow, FILTER STRIP
Short Grass Pasture Kv= 7.0 fos
10.6 388 Total

POST DEV REV 52107 Type 11 24-hr Rainfall=3.60" (1 Year Storm Event)
Prepared by COASTAL ENGINEERING & SURVEYING
Subcatchment 1S: POST DEV
Hydrograph Plot
p Runoff
Time (hours)

POST DEV REV 52107 Type 11 24-hr Rainfall=3.60" (1 Year Storm Event)
Prepared by COASTAL ENGINEERING & SURVEYING
HydroCADO 6.00 s/n 000490 @ 1986-2001 Applied Microcomputer Systems 5/22/2007
Subcatchment 2S: POST DEV #2
Runoff = 0.38 cfs @ 12.31 hrs, Volume= 0.044 of
Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-60.00 hrs, dt= 0.05 hrs
Type II 24-hr Rainfall=3.60"
11 68 PERVIOUS AREAS
Tc Length Slope Velocity Capacity Description
27.8 523 0.0020 0.3 Shallow Concentrated Flow, R/W SWALE
Short Grass Pasture Kv= 7.0 fps
0.2 46 0.0050 3.7 4.57 Circular Channel (pipe), 15" RCP CULVERT
Diam= 15.0" Area= 1.2 sf Perim= 3.9' r= 0.31' n= 0.013
4.9 185 0.0080 0.6 Shallow Concentrated Flow, R/W SWALE
Short Grass Pasture Kv= 7.0 fos
32.9 754 Total
Subcatchment 2S: POST DEV #2
Hydrograph Plot
Time (hours)
p Runoff

POST DEV REV 52107 Type 11 24-hr Rainfall=3.60" (1 Year Storm Event)
Prepared by COASTAL ENGINEERING & SURVEYING
HydroCAD@ 6.00 s/n 000490 @ 1986-2001 Applied Microcomputer Systems 5/22/2007
Pond 1P: BMP INFILTRATION BASIN #1
Inflow =
4.02 cfs @
12.03 hrs,
Volume=
0.226 of
Outflow =
2.97 cfs @
12.10 hrs,
Volume=
0.226 af, Atten= 26%, Lag= 4.6 min
Discarded =
2.97 cfs @
12.10 hrs,
Volume=
0.226 of
Primary =
0.00 cfs @
5.00 hrs,
Volume=
0.000 of
Routing by Stor-Ind
method, Time Span= 5.00-60.00
hrs,
dt= 0.05 hrs
Peak Elev= 7.05' Storage= 955 cf
Plug -Flow detention time= 4.2 min calculated for 0.226 of (100% of inflow)
Storage and wetted areas determined by Irregular sections
Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area
(feet) (so-ft) (feet) (cubic -feet) (cubic -feet) (so-ft)
6.50
0
0.0
0
0
0
7.00
4,236
273.0
706
706
5,931
8.00
5,108
297.0
4,665
5,371
7,057
8.40
6,109
330.0
2,240
7,612
8,708
9.00
8,826
831.0
4,456
12,067
54,996
9.50
12,569
955.0
5,321
17,388
72,625
Discarded OutFlow (Free Discharge)
L2=Exfiltration
Primary OutFlow (Free Discharge)
L1=Broad-Crested Rectangular Weir
# Routing
1 Primary
2 Discarded
Invert Outlet Devices
8.40' 13.0'
Head
Coef.
0.00' 0.041
0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60
;h) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63
m Exfiltration over entire Surface area

POST DEV REV 52107 Type 11 24-hr Rainfall=3.60" (1 Year Storm Event)
Prepared by COASTAL ENGINEERING & SURVEYING
Inflow
O Outflow
Discarded
O Primary
18 20 22 24 26 28 30 32 34 3E
Time (hours)

POST DEV REV 52107 Type 11 24-hr Rainfall=3.60" (1 Year Storm Event)
Prepared by COASTAL ENGINEERING & SURVEYING
HydroCADO 6.00 s/n 000490 @ 1986-2001 Applied Microcomputer Systems 5/22/2007
Pond 2P: BMP INFILTRATION BASIN #2
Inflow =
0.38 cfs @
12.31 hrs,
Volume=
0.044 of
Outflow =
0.38 cfs @
12.33 hrs,
Volume=
0.044 af, Atten= 0%, Lag= 0.8 min
Discarded =
0.38 cfs @
12.33 hrs,
Volume=
0.044 of
Primary =
0.00 cfs @
5.00 hrs,
Volume=
0.000 of
Routing by Stor-Ind method, Time Span= 5.00-60.00 hrs, dt= 0.05 hrs
Peak Elev= 7.06' Storage= 18 cf
Plug -Flow detention time= 0.8 min calculated for 0.044 of (100% of inflow)
Storage and wetted areas determined by Irregular sections
Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area
(feet) (so-ft) (feet) (cubic -feet) (cubic -feet) (so-ft)
7.10
891
159.0
30
30
2,012
7.30
1,134
604.0
202
232
29,031
7.45
3,700
935.0
344
576
69,569
Discarded OutFlow (Free Discharge)
t-3=Exfiltration
Primary OutFlow (Free Discharge)
t-1=Culvert
t-2=Orifice/Grate
# Routing
1 Primary
2 Device 1
3 Discarded
Invert Outlet Devices
4.70' 15.0" x 64.0' long Culvert Ke= 0.500
Outlet Invert= 4.54' S= 0.0025 '/' n= 0.012 Cc= 0.900
7.40' 18.0" Horiz. Orifice/Grate Limited to weir flow C= 0.600
0.00' 0.041670 fpm Exfiltration over entire Surface area

POST DEV REV 52107 Type // 24-hr Rainfall=3.60" (I Year Storm Event)
Prepared by COASTAL ENGINEERING & SURVEYING
0.42-- 0
0.4=
0.38:
0.36--
0.34
0.32=
0.3-
0.28
0.26--
JT 0.244
0.22.
3: 0.2J
0
FL 0 . 18
0.16-
0.14=
0.121
0.1
0 08
0.106 .
0.04 .
Time (hours)
El Inflow
0 Outflow
0 Discarded
0 Primary

Design Calculations for Stormwater Basin Storage
via Simple Method
Prepared For
COLINGWOOD GROUP DEVELOPMENT
Located at intersection of
COLINGTON ROAD & COLINGWOOD LANE
DARE COUNTY - TOWN OF KILL DEVIL HILLS (OUTSIDE)
Prepared By:
COASTAL ENGINEERING & SURVEYING
22 May 2007

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