NCC215547_Site Plan or Location Map_20211007

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Note:
Contractor shall insure that he and all his workers (contractors,
subcontractors and other site personnel) do not damage construction
stakes or other measures used in laying out the project whether by
the Engineer or another entity including those under the employ of the
contractor. Contractor shall cause his workers to observe and verify
to the fullest extent practicable that stakes, other measures and grades
are, or appear to be, accurate and correct, and immediately, but prior
to any associated work, notify the staking entity of any potential conflict,
error or question regarding the work. The Engineer shall not be responsible
if all of the above measures are not strictly adhered to. The Engineer shall
not be responsible where due to damage, his staking can not be verified.
For critical or costly components of the work, where the contractor believes
that staking may not be. preserved, the contractor shall request the staking
entity to place staking in an area where its preservation can be insured.
4 r 373 L m w;
137 � r
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- ` 250 r
Skimmer Sediment Basin Chart
Sediment
Disturbed
Q10
Required
Volume Actual Volume Required Surface
Actual Surface
General
Top Dimension
(ft)
Qd
Skimmer
Orifice
Td
Basin
Area (Acres)
(CFS)
(Cubic Yards) (Cubic Yards) Area(sf)
Area (sf)
(Length
x Width x
Depth
(cf/Day)
Size (in)
Dia. (in)
(Days)
#1
3.7
8.0
247
250 2,600
2,700
901L
x 30'W x
2.5'D
2,250
4
1.7
3
#2
3.7
8.0
247
250 2,600
2,700
90'L
x 301W x
2.5'D
2,250
4
1.7
3
#3
3.9
8.4
260
264 2,730
2,852
92'L
x 31'W x
2.5'D
2,376
4
1.8
3
Q10=CiA
Orifice Dia. (in)= Qd/{2310* H)
C=0.25
Qd=dewatering rate=V/td (Cf/Day)
tc=5 min
V=Volume (Cf)
i10=-7.2
in/hr.
td-Draw Down Time (Days=3)
H=0.333 ft For 4" Skimmer
Design Notes:
1. Side slopes from top of bank down to inside bottom of basin are to be 2:1
2. Side slopes from top of bank to ex ground are to be no steeper than 3:1
3. Skimmers shall be Faircloth Skimmers or approved equal
4. 325 sf minimum surface area per cfs of Q10 peak inflow
5. 66.7 cy minimum volume per acre of disturbed area
6. Upon complete restabilization of all disturbed areas, and approval by Engineer and NCDENR-LQS,
remove sediment basin and regrade swale, fertilize, seed and mulch.
7. Field install Diversion Ditches as needed to ensure positive drainage towards upper ends of sediment basin.
Swale Calculations Chart
Area
Q10 Side- Channel V10
V10
�•
Section
(acres)
(cfs) Slope Slope(%) (bare)(fps)
(grassed)(fps)
1 - 1
2 - 2
3.7
7.6
8.0 3:1 0.1% 1.7
16.4 3:1 0.10 2.0
0.8
1.0
Q=ciA
Friction Factors
C=0.3
'10=7.2
in/hr.
n=0.02 Bare Earth
n=0.05 Grass
v=1.49 R 2/3 s 1/2
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Maintenance Plan:
1. All erosion and sedimentation control devices shall be checked for stability and operation
following every runoff -producing rainfall event and in no case less than once every week Any
needed repairs will be made immediately to maintain all devices in the operating conditions
intended.
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2. Sediment shall be removed from behind silt fence when it accumulates to a depth of six inches.
3. Sediment shall be removed from the inlet protection devices when storage capacity has been
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approximately 50% filled.
4. Any sediment tracked onto adjacent pavement shall be removed immediately.
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5. A maintenance log of all erosion control inspections and maintenance performed shall be kept
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onsite at all times.
6. Any sedimentation that occurs into the offsite stormwater drainage network shall be removed
immediately to prevent the stormwater device from sediment accumulation.
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General Notes
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1. Topographic information was created from a combination of Lidar elevation data obtained from the
N.C. flood mapping program, and ground topographic survey by "tidewater Associates, Inc. on,
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NAVD'88 Datum. Lidar contour lines are not adjusted to match ground shots.
2. Boundary information taken from an actual survey by Tidewater Associates, Inc. on 9-24-2020.
3. Development area is wooded.
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4. All easements to be drainage and utility at dimensions shown, unless otherwise noted.
5. There are no Areas of Environmental Concern (AEC) as defined by Coastal Area Management Act (CAMA) on
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this site.
6. No wetland delineation prepared for this site.
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7. Stormwater from this project drains to an unnamed tributary to Pasture &ranch which is classified as SA;HQW.
8. For additional information, see plan and profile and detail sheets.
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9. This site is not affected by any special flood hazard per FEMA CPN #370340 5346 J, (Onslow County)
effective November 3, 2005.
10. The purpose of this plan is to dear and clean debris for future development.
Soil stockpiles shall be encompassed by silt fence and maintain a minimum slope of 3:1, if left for more than 14
days, temporary seeding to be added to stockpile.
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Legend:
BG - Below Ground
CMF - Concrete Monument Found
CP - Control Point
D.B. - Deed Book
E - Easting
Elev. - Elevation
Ex. - Existing
IPF - Iron Pipe Found
ISF - Iron Stake Found
M.B. - Map Book
N - Northing
Pg. - Page
R/W - Right-of-way
558 - Skimmer Sediment Basin
CL - Clearing Limits
CL sf - Clearing Limits / Silt Fence
--�- --41; - - Existing Contour
- Existing Ditch/Swale
... ... ... --- - Proposed Swale
- - - . • - • - - - - - - Wetlands Line
- Woodsline
Erosion and Sedimentation Control Notes:
1. Clearing or grading operations shall begin at low points of outfall release or other locations where
sediment control measures are shown on the plan and the sediment control devices (sediment
traps, silt fences, etc.) shall be installed before or simultaneously with the disturbance of any
area draining to the device.
2. Sediment control devices and structures shall be installed, maintained and amended as needed to
provide effective control of accelerated erosion and sedimentation until the contributing
watersheds are stabilized.
3. Requirements for materials handling shall follow rules set forth in NCG01, Part II. Section F.
4. Self -Inspection, record keeping, and reporting, shall follow rules set forth in NC601, Part III,
Sections A, B, and C.
5. Construction sequence:
A. Notify Engineer, owner and Land Quality Section prior to beginning construction.
B. Install stabilized construction entrance at all points of access.
C, Limits of clearing will be as shown. Owner may lessen the amount to clear. Confirm prior to
start of work. Silt fence shall be installed at the down slope edge of clearing immediately
after a lot is cleared. Silt fence shall be maintained until the lot is stabilized completely.
Silt fences are shown based on topographic information in the locations expected to be needed
to trap sediment prior to entering down slope areas. Actual locations of installation shall be
adjusted to the actual physical on site topography. That is, where silt fence is not shown on
the plan but the actual topography reflects a downward slope, silt fence shall be installed.
Where the actual topography reflects an upward slope silt fence is not required.
D. Clear d grub entire area within the clearing limits as shown.
E. Strip topsoil & stockpile for later use.
F. Construct sediment traps and rock check dams where shown. Construct drainage swales. Install
storm drainage piping.
G. Immediately seed, mulch and install temporary liners to swales where shown.
H. Maintain erosion control measures as needed to assure full functionability.
I. Reseed and mulch shoulders and swales. Install liners on all swales.
J. Provide ground stabilization (Temporary or Permanent) on perimeter areas and slopes greater
than 3.1 within 7 days following the completion of any phase of grading or construction; and 14
days for all other areas internal to the project
6. Seeding Specifications:
Apply lime and fertilizer and work into 4 - 6 inches of soil. Seed mixture shall be distributed
uniformly and covered with a clean straw mulch. All mulch shall be crimped or asphalt tacked to
hold in place, Material and application rates as follows, and are generally considered minimums.
*Mulch rate to be doubled if crimped`
Material Application Rate
Lime 3000 lbs. ac.
Fertilizer (10-10-10) 750 lbs./ac.
Mulch 2 tons/ac.
Asphalt Tack 435 gal./ac. (Max)
Permanent Seeding
Common Bermu a
(Unhulled Sept. 1 - April 1) 100 lbs./ac.
(Hulled April 1 - Sept. 1) 75 lbs./ac.
"Rebel" Fescue 50 lbs./ac.
Rye Grain (Sept. 1 - April 1 only) 50 lbs./ac.
German Millet (April 1 - Sept. 1 only) 50 lbs./ac.
Temporary Seeding
Dec. 1 - April 1
Kobe Lespedeza 50 lbs./ac.
Rye Grain 120 lbs./ac.
April 15 - Aug. 15
German Millet 40 lbs./ac.
Aug. 15 - Dec. 30
Rye Grain 120 lbs./ac.
7. Once all areas have been stabilized, contractor is to remove temporary erosion control measures,
regrade, dr mulch to restabilize these areas.
8. For additional requirements, see the approved erosion and sedimentation permit.
9. All ditches are 3:1 ditches to be approximately 24 inches deep to provide surface
drainage and connection to future stormwater ponds for sediment storage.
CA . ••.iROZ4
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'cam SEAL 9r;
34978 _=
A
EROSION AND SEDIMENTATION CONTROL PLAN
PEYTONS RIDGE
SECTION 9
White Oak / Swansboro Twp, Onslow Co, North Carolina
Owner / Developer:
South State Development, LLC
121 Garnet Lane
Jacksonville, North Carolina 285"
DATE: 09/07/2021
GRAPHIC SCALE: 1"=200'
0 100 200 400 600
SCALE:1"-200' FEET
TIDEWATER ASSOCIATES, INC.
Consulting Engineers - Land Surveyors - Land Planners
Jacksonville, North Carolina
P.O. Box 976 - 306 New Bridge Street - 28540
Phone (910) 4SS-2414 - www.TidewaterENC.com
Firm License Number: F-0108
Field Boole NIA
Dish Name: Aced #2967
Filename: Peyton 9 - ESC Plan dwg KNW Sheet 1 of 2
Job No.: S200108-n50
EsG 1961