20140843 Ver 1_Stormwater Site Plans_20151212

SW 1
12-1-14 evise
storm water
5-11-15 Revise
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COUNTY: HAYW❑❑D
❑WNSHIP:
AYNESVILLE
WATERSHED:
FRENCH BROAD
SCALE:
1"-50'

C-
F71
RGY DISSIPAT❑R
PROPOSED
15" CULVERTALE N
INV IN 2578.5' OUT
0.5% SLOPE 0.5% SLOPE
INV ❑ U T 2575J-'------ ONNECT To 15'
CULVERT
JJKAINAGE AREA #2 ELEV 257U9 DE
1,20 ACRES t
C=0,95
STORM WATER 3'X6,5'
❑X'STORM
t
�BI❑RETENTION
WATER
#2
TOP EL 2584.5'
EMERGENCY OUTFALL 2584'Lip-WATER
C A (acres) I (in/hr) Q (cfs)
V (fps)
2&3
CUF
BOTTOM EL 2578'
4
0.95 1.07 6.56 1 6.7 1
5.4 15" outlet
STORM WATER MEASURES DRAINAGE AREA #2
GRASSED BI❑RETENTION
STORM WATER CUR CUT TOP ELEVATION 2585
EMERGENCY OVERFLOW ELEV 2584
BOTTOM ELEVATION 2583,25
BOTTOM ELEVATION STONE/UNDERRAIN LAYER 2579.95
STORM WATER MEASURES DRAINAGE AREA #1 VERIFIED SHWT 2570.8
GRASSED BI❑RETENTION
WITH EMERGENCY OVERFLOW STRUCTURE TO
LEVEL SPREADER/VEGETATIVE FILTER STRIP OUTLET TO CONNECT TO 24" CULVERT AND SHEET FLO
TOP ELEVATION 2585 ACROSS WETLAND
EMERGENCY OVERFLOW ELEVATION 2584
BOTTOM ELEVATION 2583,25 DISCHARGE INTO THE WETLAND USED FOR A MEANS OF
BOTTOM ELEVATION STONE/UNDERRAIN LAYER 2579,95 SUSTAINING THE VITALITY OF THE WETLAND
VERIFIED SHWT 2573.6
J I UKI1 W(-) I LK (-)KL(-) :RJ
GRASSED BIORETENTION
TOP ELEVATION 2585
EMERGENCY OVERFLOW ELEV 2584
BOTTOM ELEVATION 2583,25
BOTTOM ELEVATION STONE/UNDERDRAIN LAYER 2579.95
VERIFIED SHWT 2567.7
OUTLET TO CONNECT TO 24" CULVERT AND SHEET FLOW
ACROSS WETLAND
DISCHARGE INTO THE WETLAND USED FOR A MEANS OF
SUSTAINING THE VITALITY OF THE WETLAND
GENERAL NOTES
USE CLASS "B' CONCRETE THROUGHOUT
PROVIDE ALL CATCH BASINS OVER 3'-6" IN
DEPTH WITH STEPS 12" ON CENTER
FOR 8'-0' IN HEIGHT OR LESS USE 6" WALLS
AND BOTTOM SLAB. OVER 8'-0" TO 16'-0" IN
HEIGHT USE 8" WALLS AND BOTTOM SLAB.
ADJUST QUANTITIES ACCORDINGLY.
�3.0�
OUTLET DETAIL_
Bioretention Notes:
1. Soil media shall be uniform and free of stones.
2. Test the media after placement for the actual
drainage rate,
The soil media should be as follows:
Mix; 85-88% Sand
8-12% Fines
3-5% Organic
3. Cover the area with Fescue or Bluegrass sod.
4. Phophorus Indes CP Index) of soil media shall be
between 10-30, P -Index = 10 recommended. Test
soil after placement for the actual P Index and
treat soil as needed,
5. Soil infiltration rate shall be minimum 1.0 in/hr.
Test soil after placement.
6. Install 2-4" under drains beneath each of the
bioretention cells, Slope under drains to
acheive a 0,5" per foot slope. Pipe material shall
be either Schedule 40 or SDR 35 smooth wall
PVC pipe.
7. Six clean outs provided per basin at pipe
junctions or elbows.
iTAPER CURB TO EXISTING GROUND
DRAINAGE AREA/ #4/
1,07 ACRES /QQf
C=0,95 STORM WATER ! �'
BI❑RETENTI❑N #4
TOP ELEV 2584.5
EMERGENCY OVERFLOW
ELEV 2584.0
BOTTOM ELEV 2577.25
7.25
/
/
0.5
EXISTING GROUND 420
T^^ ^F FILL
GROUND LINE
=T--= -- --} 11 f3= COMPACT AFTER
/ �/ _ PIPE IS PLACED
o / CURB TRANSITI❑N DETAILPRIOR TO
-4- PLACEMENT OF FILL
I.D./6 MIN. D. + 3'
NOT LESS THAN 6'
`PROPOSED 15" CULVERT
INV IN 2580
INV OUT 2579.5
y0
o STORM WATER 3'X6,5' BOX'
1\
TOP EL 2584.5'
EMERGENCY OUTFALL 2584'
BOTTOM EL 2578'
❑NSTRUCT 4'X2'
TOP ELEV 2587
4 /
/
STORM WATER MEASURE DRAINAGE AREA #4 )K
q GRASSED BI❑RETENTI❑N WITH EMERGENCY OVERFLOW
AND SUPPLEMENTAL LEVEL SPREADER/VEGETATIVE
FILTER STRIP
TOP ELEVATI❑N 2585
\ EMERGENCY OVERFLOW ELEVATI❑N 2584
BOTTOM ELEVATI❑N 2583,25
\
BOTTOM ELEVATI❑N ST❑NE/UNDERRAIN LAYER 25793
VERIFIED SHWT 2577.4
'ERGENCY OVERFLOW
TLET
PROFILE VIEW
OVERFLOW STRUCTURE
DRAINAGE AREA #1
BASIN WIDTH VARIES
ELEVATI❑N VIEW
FLOW FROM DRAINAGE AR
2585
2583.2`.
2579.9`.
LEVEL SPREADER u
7.25
I.D./6 MIN.
NOT LESS THAN 6'
�' PER FOOT
BUT NOT LESS THAN 12'
NOR MORE THAN 24'
NORMAL EARTH FOUNDATION
UNSUITABLE MATERIAL FOUNDATION
GROUND LINE
1PACT AFTER
E IS PLACED
'RI❑R TO
aCEMENT OF FILL
-NIrTNIPPPTN1F F,�,RPTf
GENERAL NOTES:
I,D. = THE MAXIMUM HORIZONTAL INSIDE DIAMETER DIMENSION
O.D. = THE MAXIMUM HORIZONTAL OUTSIDE DIAMETER DIMENSION
H = THE FILL HEIGHT MEASURED VERTICALLY AT ANY POINT
ALONG THE PIPE FROM THE TOP OF THE PIPE TO THE TOP
OF THE EMBANKMENT AT THAT POINT.
D❑ NOT OPERATE HEAVY EQUIPMENT OVER ANY PIPE CULVERT
UNTIL THE PIPE CULVERT HAS BEEN PROPERLY BACKFILLED AND
COVERED WITH AT LEAST 3 FEET OF APPROVED MATERIAL.
LOOSELY PLACED SELECT MATERIAL CLASS III OR CLASS II, TYPE 1
FOR PIPE BEDDING. LEAVE SECTION DIRECTLY BENEATH PIPE
UNCOMPACTED AS PIPE SEATING AND BACKFILL WILL ACCOMPLISH
COMPACTION.
--------------- SPRINGLINE ❑ F PIPE
SELECT BACKFILL MATERIAL CLASS III OR CLASS II, BELOW
EJ SPRINGLINE
® APPROVED SUITABLE LOCAL MATERIAL ABOVE SPRINGLINE
O UNDISTURBED EARTH MATERIAL
>cQx�x SELECT MATERIAL CLASS V OR VI FOR FOUNDATION CONDITIONING,
ENCAPSULATE WITH ENGINEERING FABRIC
DUE TO SEASONAL HIGH WATER TABLE
FOR BASIN #4
SOIL MEDIA IS 1' 8' IN DEPTH
#57 STONE IS 8" IN DEPTH (2" ABOVE AND BELOW)
ASPHALT PAVEMENT OVERFLOW 2585
e
0.5 �. 1
2584
ENERGY DISSIPATER
0.75 2583.25
8' GRAVEL
SHWT
2.0 MIN
BI❑RETENTI❑N CROSS SECTI❑N
FILL
I•I�I � 2578
�3.0 - - - - - - -
15" OUTLET CULVERT - - -
EXISTING GROUND ELEVATI❑N
EMERGENCY OVERFLOW CROSS SECTI❑N DETAIL
DRAINAGE AREA #2 & #3 ENERGY DISSIPATER
AS REQUIRED ❑N PLAN
SW 2
12-1-14 Revised storm
water
5-11-15 evise storm
water
9-12-15 Revised storm
water
12-3-15 Correct ponol
deth
1 -1 -15 Add notE #
remove weir
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COUNTY: HAYW❑❑D
OWNSHIP:
AYNESVILLE
WATERSHED:
FRENCH BROAD
SCALE:
INSERTS: 1"=30'
10yr
Drainage
5 min
Outlet
Area
C A (acres) I (in/hr) Q (cfs)
V (fps)
2&3
0.95 2.06 6.56 12.8
4.1 24" outlet
4
0.95 1.07 6.56 1 6.7 1
5.4 15" outlet
FILL
I•I�I � 2578
�3.0 - - - - - - -
15" OUTLET CULVERT - - -
EXISTING GROUND ELEVATI❑N
EMERGENCY OVERFLOW CROSS SECTI❑N DETAIL
DRAINAGE AREA #2 & #3 ENERGY DISSIPATER
AS REQUIRED ❑N PLAN
SW 2
12-1-14 Revised storm
water
5-11-15 evise storm
water
9-12-15 Revised storm
water
12-3-15 Correct ponol
deth
1 -1 -15 Add notE #
remove weir
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COUNTY: HAYW❑❑D
OWNSHIP:
AYNESVILLE
WATERSHED:
FRENCH BROAD
SCALE:
INSERTS: 1"=30'

OVERFLOW ELEVATION
ECEIVING ELEVATION
obdD
Ddb ° 8
ro ro Qdo
/i
//
THICKNESS Cd') = I.5 X MAX ROCK DIAMETER - 6" MIN
SECTI❑N A -A
�V p z
V rororo b roro�� v'0 '0 E7
ROCK d50
� 50% SHALL BE LARGER THAN P
01Cd 6' MIN DIA X
ob00 6b �c
05 X D MI La=6 x D MIN
A
PLAN
NOTES
1. La -LENGTH OF APRON DISTANCE La SHALL BE OF SUFFICIENT LENGTH TO DISSIPATE
ENERGY
2. APRON SHALL BE SET AT ZERO GRADE AND ALIGNED STRAIGHT,
3. FILTER MATERIAL SHALL BE FILTER FABRIC OR 6' THICK MINIMUM GRADED GRAVEL LAYER,
PIPE
CULVERT SIZE 15 18 24 30
(I N)
ENER❑Y DISSIPAT❑R AT PIPE OUTLET
)KUSE WITH ALL PIPE OUTLETS
z
Q
0
z 151.
w
TOP ELEV 8585 J TOP ELEV 2584
BOTTOM ELEV 25816 BOTTOM ELEV 258025
EXTEND 24' CULVERT 192'
Q - --
33
19 2
- - 1 �-
INLET CULVERT
BIO5
RETENTION #2 ELEV 25733
- OUTLET INTO WETLAND
ELEV 2574
INLET CULVERT
BIFIRETENTION #3 ELEV 2574'7i
10,0
X1.0 �t ❑4" CULVERT ELEVATI❑N DETAIL_
1.0
0.5
1.0
0.5 I-- . 5 a a 5
�2,OV
LEVEE SPREADER DETAIL_
GABION BASKET WALL
Description
30 I
#57 STONE [-4.
BLIND SWALE
- FROM BMP
. , . 6,67 �,�I/���_--� �� ►_
LEVEL
SPREADER
VEGETATED FILTER STRIP
VEGETATIVE FILTER STRIP/LEVEL
SPREADER CROSS SECTION
Construct a gabion basket wall to the dimensions shown on the
plans.
Materials
Galvanized steel baskets ASTM standard A1057/A1057M
Washed Stone ASTM C615/C615M
Rip Rap ASTM C615/C615M
Construction Methods
Grade a 5' wide area for the foundation stone. Place 6-8" of
washed stone as the wall foundation. Construct baskets to a
dimension of 4 feet wide by 5 feet deep by the specified length.
Fill baskets with 6" nominal size rip rap; arranging the rip rap to
minimize voids. Secure the baskets with galvanized steel wire.
Stack baskets to the specified height offsetting each subsequent
row by 1 %Z '. Backfill with 6" of stone.
Peak Flow Calculations
1 year 24 hour storm
Q=C)KI)KA
Drainage
Area
C
I (in/hr)
A (acres)
�Q(cfs)
Pre Development
3.33
15 0.25 6.2
0
1
0.35
APRON WIDTH
S.0
6,0
8
10
<ET�
1.2
0.045
3
0.35
APRON LENGTH
750
9
12
15
CET)
1.07
0.040
5
0.35
RIP RAP STONE
6
6
6
6
THICKNESS CINE
2629
1 0.95
0.107
0.99
SYNTHETIC
4
6
10
16
FILTER
0.107
0.86
0.087
4 0.95
BLANKET CSY)
1.07
0.109
5 0.95
0.107
0.75
0.076
11
ED:z
z
Q
0
z 151.
w
TOP ELEV 8585 J TOP ELEV 2584
BOTTOM ELEV 25816 BOTTOM ELEV 258025
EXTEND 24' CULVERT 192'
Q - --
33
19 2
- - 1 �-
INLET CULVERT
BIO5
RETENTION #2 ELEV 25733
- OUTLET INTO WETLAND
ELEV 2574
INLET CULVERT
BIFIRETENTION #3 ELEV 2574'7i
10,0
X1.0 �t ❑4" CULVERT ELEVATI❑N DETAIL_
1.0
0.5
1.0
0.5 I-- . 5 a a 5
�2,OV
LEVEE SPREADER DETAIL_
GABION BASKET WALL
Description
30 I
#57 STONE [-4.
BLIND SWALE
- FROM BMP
. , . 6,67 �,�I/���_--� �� ►_
LEVEL
SPREADER
VEGETATED FILTER STRIP
VEGETATIVE FILTER STRIP/LEVEL
SPREADER CROSS SECTION
Construct a gabion basket wall to the dimensions shown on the
plans.
Materials
Galvanized steel baskets ASTM standard A1057/A1057M
Washed Stone ASTM C615/C615M
Rip Rap ASTM C615/C615M
Construction Methods
Grade a 5' wide area for the foundation stone. Place 6-8" of
washed stone as the wall foundation. Construct baskets to a
dimension of 4 feet wide by 5 feet deep by the specified length.
Fill baskets with 6" nominal size rip rap; arranging the rip rap to
minimize voids. Secure the baskets with galvanized steel wire.
Stack baskets to the specified height offsetting each subsequent
row by 1 %Z '. Backfill with 6" of stone.
Peak Flow Calculations
1 year 24 hour storm
Q=C)KI)KA
Drainage
Area
C
I (in/hr)
A (acres)
�Q(cfs)
Pre Development
3.33
15 0.25 6.2
0
1
0.35
0.107
0.99
0.037
2
0.35
0.107
1.2
0.045
3
0.35
0.107
0.86
0.032
4
0.35
0.107
1.07
0.040
5
0.35
0.107
0.75
0.028
Post Development
1
1.07
2629
1 0.95
0.107
0.99
0.101
2 0.95
0.107
1.2
0.122
3 0.95
0.107
0.86
0.087
4 0.95
0.107
1.07
0.109
5 0.95
0.107
0.75
0.076
Runoff Volume Calcu(ations:
Rv=0.05+0,9)KIa
V=3630wRdwRvwA
Emergency Outlet Q
Q=CwwLwH^1,5
Tx 6.5' box
Cw L crest
H (ft) Q (cfs)
3.33 8
0.3 4.4
Overflow Structure
3.33
15 0.25 6.2
Bioretention
ENERGY
DISSIPATER
NOTES:
1. THE T❑PS❑IL IN THE VEGETATIVE FILTER STRIP MUST BE
AMENDED WITH LIME AND ORGANIC MATTER. SELECT GRASSES
FROM STABILIZATI❑N TABLE ON SHEET SW -3.
2. ENERGY DISSIPATER AT BASIN #1 IS OVERSIZED TO
UNIFORMLY CONNECT TO LEVEL SPREADER.
3. PR❑VIDE AN IMPERVI❑US FILTER BARRIER UNDER BASINS
WHERE THE SHWT IS WITHIN 2 FEET OF THE BOTTOM
ELEVATI❑N,
Stage Storage Volume Calculation Table
Drainage Area
Elevation
Surface Area (sf)
Incremental Volume (cf)
Cumulative Volume (cf)
1
less than 2583.25
operating volume
0
0
0
2583.25
3283
0
0
3728
2584
4256
2827
2827
over 2585
2585
5300
4778
7605
0.86
over 2585
freeboard
0
7605
Drainage Area Elevation
Surface Area (sf)
Incremental Volume (cf)
Cumulative Volume (cf)
2 less than 2583.25
operatingvolume
0
0
2583.25
4518
0
0
2584
5422
3728
3728
2585
6398
5910
9638
over 2585
freeboard
0
9638
Drainage Area Elevation
Surface Area (sf)
Incremental Volume (cf)
Cumulative Volume (cf)
3 less than 2583.25
operating volume
0
0
2583.25
3452
0
0
2584
4375
2935
2935
2585
5371
4873
7808
over 2585
freeboard
0
7808
Drainage Area Elevation
Surface Area (sf)
Incremental Volume (cf)
Cumulative Volume (cf)
4 less than 2583.25
operating volume
0
0
2583.25
3626
0
0
2584
4472
3037
3037
2585
5389
4931
7967
over2585
freeboard
0
7967
Drainage
Area
la
Rv
Rd
A (acres)
V (cu ft)
Ponding
Depth,
inches
Required
Surface
Area
1
0.81
0.78
1
0.99
2812
9
3749
2
0.84
0.80
1
1.2
3506
9
4674
3
0.86
0.83
1
0.86
2580
9
3440
4
0.70
0.68
1
1.07
2629
9
3506
)Ksoil type DsC, Dillslooro Loam
Underdrain
Q Bioretention Cell Q=2.6E-5)KKA H/L
Drawdown =Ponding V/Q
Stabilization Requirements:
4.0
4rj Al 0.5
BLIND SWALE DETAIL
Stabilization for this project shall comply with the time frame guidelines as
specified by the NCG-010000 general construction permit effective August 3,
2011 issued by the North Carolina Department of Environment and Natural
Resources Division of Water Quality. Temporary or permanent ground cover
stabilization shall occur within 7 calendar days from the last land -disturbing
activity, with the following exceptions in which temporary or permanent ground
cover shall be provided in 14 calendar days from the last land -disturbing activity:
• Slopes between 2:1 and 3:1, with a slope length of 10 ft. or less
• Slopes 3:1 or flatter, with a slope of length of 50 ft. or less
• Slopes 4:1 or flatter
SEEDING AND MULCHING:
The kinds of seed and fertilizer, and the rates of application of seed, fertilizer, and
limestone, shall be as stated below.
During periods of overlapping dates, the kind
of seed to be used shall be determined. All rates are in pounds per acre.
August 1 - June 1
May 1 - September 1
100# Tall Fescue
100# Tall Fescue
15# Kentucky Bluegrass
15# Kentucky Bluegrass
30# Hard Fescue
30# Hard Fescue
25# Rye Grain
10# German or Browntop
Millet
2
500# Fertilizer
500# Fertilizer
4000# Limestone
4000# Limestone
Approved Tall Fescue Cultivars
2nd Millennium; Duster; Magellan; Rendition; Avenger; Endeavor; Masterpiece;
Scorpion; Barlexas; Escalade; Matador; Shelby; Barlexas II; Falcon II, IFI, IV &
V; Matador GT; Signia Barrera; Fidelity; Millennium; Silverstar; Barrington;
Finesse II; Montauk; Southern Choice 11; Biltmore; Firebird; Mustang 3; Stetson;
Bingo; Focus; Olympic Gold; Tarheel; Bravo; Grande II; Padre; Titan Ltd;
Cayenne; Greenkeeper; Paraiso; Titanium; Chapel Hill; Greystone; Picasso;
Tomahawk; Chesapeake; Inferno; Piedmont; Tacer; Constitution; Justice; Pure
Gold; Trooper; Chipper; Jaguar 3; Prospect; Turbo Coronado; Kalahari; Quest;
Ultimate; Coyote; Kentucky 31; Rebel Exeda; Watchdog; Davinci; Kitty Hawk;
Rebel Sentry; Wolfpack; Dynasty; Kitty Hawk 2000; Regiment 11; Dominion;
Lexington; Rembrandt
Approved Kentucky Bluegrass Cultivars:
Alpine; Bariris; Envicta; Rugby; Apollo; Bedazzled; Impact; Rugby II; Arcadia;
Bordeaux; Kenblue; Showcase; Arrow; Champagne; Midnight; Sonoma; Award;
Chicago II; Midnight II
Approved Hard Fescue Cultivars:
Chariot; Nordic; Rhino; Warwick; Firefly; Oxford; Scaldis II; Heron; Reliant II;
Spartan II; Minotaur; Reliant IV; Stonehenge
Fertilizer shall be 10-20-20 analysis. A different analysis of fertilizer may be
used provided the 1-2-2 ratio is maintained and the rate of application adjusted to
provide the same amount of plant food as a 10-20-20 analysis and as directed.
TEMPORARY SEEDING:
Fertilizer shall be the same analysis as specified for Seeding and Mulching and
applied at the rate of 400 pounds and seeded at the rate of 50 pounds per acre.
German Millet, or Browntop Millet shall be used in summer months and rye grain
during the remainder of the year. The Engineer will determine the exact dates for
using each kind of seed.
FERTILIZER TOPDRESSING:
Fertilizer used for topdressing shall be 16-8-8 grade and shall be applied at the
rate of 500 pounds per acre. A different analysis of fertilizer may be used
provided the 2-1-1 ratio is maintained and the rate of application adjusted to
provide the same amount of plant food as 16-8-8 analysis and as directed.
SUPPLEMENTAL SEEDING:
The kinds of seed and proportions shall be the same as specified for Seeding and
Mulching, and the rate of application may vary from 25# to 75# per acre. The
actual rate per acre will be determined prior to the time of topdressing and the
Contractor will be notified in writing of the rate per acre, total quantity needed,
and areas on which to apply the supplemental seed. Minimum tillage equipment,
consisting of a sod seeder shall be used for incorporating seed into the soil as to
prevent disturbance of existing vegetation. A clodbuster (ball and chain) may be
used where degree of slope prevents the use of a sod seeder.
MOWING:
The minimum mowing height on this project shall be six inches.
Drainage
Area
Ksat*
(in/hr)
Provided
SA, A
Height of
water
above
gravel, H
Thicknes
s of Soil
Layer, L
Q=2.3E-5*KA
H/L, x 10%
safety factor S
C
n
Diameter
of single
pipe, in
Numberof
Cleanouts,
1/1000sf
Ponding Drawdown
Volume, cf , t hours
1
1
4256
2.75
2
0.15
0.005
0.011
4
4
5675
11
2
1
5422
2.75
2
0.19
0.005
0.011
4
5
7229
11
3
1
4375
2.75
2
0.15
0.005
0.011
4
4
5833
11
4
1
5389
2.75
2
0.19
0.005
0.011
4
5
7185
11
CENTER of
ROADWAY
9 9'
PARKING PARKING
LOT n/I t I. OT
-77 7
CD) ® 0%
STATI❑NS 0+00 TO 2+00
CENTER OF
ROADWAY
5'T_ 2.5' 9' 9'
NATURAL
GROUND/GRASS
5 '
© A B D 0�
GRASS
SHOULDER
STATIONS 2+00 TO 4+75
CENTER OF
ROADWAY
9' g
GRASS GRASS
SHOULDER
SHOULDER
Y In
/ft 1
O D D
STATIONS 4+75 TO 6+70
CONSTRUCTION SCHEDULE
1. Obtain Erosion Control Permit and other applicable permits prior to the start of grading.
2. Install rain gauge in an accessible area. Dedicate a log book to record rain events and weekly inspections.
3. Maintain the temporary gravel construction entrance from phase I.
4. Stake area around remaining wetland for perimeter protection fence.
3. Manually install a perimeter protection fence around the delineated wetland. No equipment is allowed
within the wetland boundary that is not to be disturbed.
4. Install silt fence at all locations shown on plan sheet. Silt fence shall be manually installed along the
outside of the 10 foot wetland buffer.
5. Layout the areas for the construction of the temporary skimmer basins.
6. Construct the temporary skimmer basins to the appropriate dimensions. Construct the baffles in the
temporary skimmer basins.
7. Establish temporary cover according to stabilization table schedule and the seeding schedule on ECP 2.
8. Seed, fertilize and mulch all exposed areas using the seeding schedule included on ECP2, adjusting to the
schedule for the season. All disturbed areas should be treated with ground cover within 7 to 14 calendar
days of completion of grading activities according to the stabilization table on ECP 2.
9. Once grading is complete, install temporary silt fence around permanent drainage easement.
10. Stabilize drainage area #2 and #3 prior to construction of the dry detention basin. Construct storm
water basins and outlet structures.
11. Seed and fert
ilize areas. Stabilize drainage area #1 and #4 prior to construction of the bioretention cell.
12. Construct bioretention cell. Cover with sod as specified.
13. Re -seed and fertilize areas as needed.
14. Once vegetation has been established, remove all temporary erosion control devices.
8.0
l.o
4rj ql +_
OVERFLOW DITCH
Use with Drainage Area #4
SW 3
ROADwnY �cHEDui �
U
EX1SIING GROUND
A
3 SE 9.58
C
GABION BASKET WALL
B
8" ]-19,OB
D
12" ABC
CENTER of
ROADWAY
9 9'
PARKING PARKING
LOT n/I t I. OT
-77 7
CD) ® 0%
STATI❑NS 0+00 TO 2+00
CENTER OF
ROADWAY
5'T_ 2.5' 9' 9'
NATURAL
GROUND/GRASS
5 '
© A B D 0�
GRASS
SHOULDER
STATIONS 2+00 TO 4+75
CENTER OF
ROADWAY
9' g
GRASS GRASS
SHOULDER
SHOULDER
Y In
/ft 1
O D D
STATIONS 4+75 TO 6+70
CONSTRUCTION SCHEDULE
1. Obtain Erosion Control Permit and other applicable permits prior to the start of grading.
2. Install rain gauge in an accessible area. Dedicate a log book to record rain events and weekly inspections.
3. Maintain the temporary gravel construction entrance from phase I.
4. Stake area around remaining wetland for perimeter protection fence.
3. Manually install a perimeter protection fence around the delineated wetland. No equipment is allowed
within the wetland boundary that is not to be disturbed.
4. Install silt fence at all locations shown on plan sheet. Silt fence shall be manually installed along the
outside of the 10 foot wetland buffer.
5. Layout the areas for the construction of the temporary skimmer basins.
6. Construct the temporary skimmer basins to the appropriate dimensions. Construct the baffles in the
temporary skimmer basins.
7. Establish temporary cover according to stabilization table schedule and the seeding schedule on ECP 2.
8. Seed, fertilize and mulch all exposed areas using the seeding schedule included on ECP2, adjusting to the
schedule for the season. All disturbed areas should be treated with ground cover within 7 to 14 calendar
days of completion of grading activities according to the stabilization table on ECP 2.
9. Once grading is complete, install temporary silt fence around permanent drainage easement.
10. Stabilize drainage area #2 and #3 prior to construction of the dry detention basin. Construct storm
water basins and outlet structures.
11. Seed and fert
ilize areas. Stabilize drainage area #1 and #4 prior to construction of the bioretention cell.
12. Construct bioretention cell. Cover with sod as specified.
13. Re -seed and fertilize areas as needed.
14. Once vegetation has been established, remove all temporary erosion control devices.
8.0
l.o
4rj ql +_
OVERFLOW DITCH
Use with Drainage Area #4
SW 3
7-12-15 ADD
PIPE DETAIL
9-12-15 REVISE
TYPE OF CONTROL
& ELEVATIONS
12-3-15 Revise
tables
12-12-15 Remove
weir
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COUNTY: HAYW❑❑D
OWNSHIP;
AYNESVILLE
WATERSHED
FRENCH BROAD
SCALE
INSERTS 1"=30'