HomeMy WebLinkAboutSG_PINNEY_09_18_26REFERENCE HYDROCAD (HYDRAULIC & HYDROLOGIC) MODELING RESULTS PRESENTED WITH THESE PLANS
APP
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ESC-1
10.32-AC
KnA PaC
PhB
PhB
PaC
KnA
CfB
PaC
PhB
PaC
CfB
CfB
KnA
KnA
KnA
PaCDP-1
Existing Subcatchment - 1 (ESC-1)
Existing Site Conditions - Area = 449,606 SF (10.32-AC)
Surface Conditions & Soils:
50.0% PaC, Hyrdologic Soil Group (HSG) A
50.0% KnA, CfB Hydrologic Soil Group (HSG) C
Runoff Curve Number = 30, Brush/Weeds/Grass, HSG A Soils
Runoff Curve Number = 65, Brush/Weeds/Grass, HSG C Soils
Runoff Curve Number = 98, Paved Parking and Roofs
Overland Stormwater Runoff - Longest Flowpath = 814 lf +/-
Sheet Flow, Dense Grass - 100 lf @ S = 1.0% avg.
Shallow Concentrated Flow, Grassed Waterway - 714 lf @ S = 3.2% avg.
To Design Point 1 - (DP 1)
EXISTING SUBCATCHMENT (As of 2020)
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N 82°20'00" W 317.60'N 80°25'00" W 323.12'
BARN
WELL
R/
W
BARN
"FILL SITE"
WELL
"FILL SITE"
"TREE CLUSTERS"
87
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89
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0
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0
87
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EXISTING MILLINGS
29,000-CF
STONE STOCKPILE
RECYCLING STORGE
CONCRETE
Tem
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Cont
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15
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W
EXISTING PILES
OF WOODY DEBRIS
(TO BE REMOVED)
TOPSOIL STOCKPILE
AND SCREENINGS AREA
19,504-SF
EXISTING FILL AREA
29,750-SF
FUTURE
FILL STAGE
AREA 5
18,387-SF
FUTURE
FILL STAGE
AREA 1
5,320-SF
FUTURE
FILL STAGE
AREA 2
10,105-SF
FUTURE
FILL STAGE
AREA 3
15,829-SF
FUTURE
FILL STAGE
AREA 4
16,472-SF
Longes
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2020 AREA OF
DISTURBANCE
112,145-SF (2.57-AC)
"PRESERVE EXISTING
TREE CLUSTERS"
"PRESERVE EXISTING
TREE CLUSTERS"
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TOP OF BANK
74 73
75
Broadcrested Weir
8'L x 4'W x 1'D
4"-8" Stone Size
Inv. El. 75.50'
Drains naturally toward
Peruville R.O.W.
swale. (DP-1)
DATE:
SCALE:
DRAWN:
JOB:
SHEET:
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1" = 50'
SDG
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SEPT 18, 2026
REFERENCE HYDROCAD (HYDRAULIC & HYDROLOGIC) MODELING RESULTS PRESENTED WITH THESE PLANS
APP
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76
74
73
72
71
70
69
68
R/
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68
PSC-1
10.32-AC
KnA PaC
PhB
PhB
PaC
KnA
CfB
PaC
PhB
PaC
CfB
CfB
KnA
KnA
KnA
PaCDP-1
PROPOSED SUBCATCHMENT (2026)
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.
N 82°20'00" W 317.60'N 80°25'00" W 323.12'
WELL
R/
W
WELL
"TREE CLUSTERS"
Fi
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82
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80
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78
.
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Tem
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Cont
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15
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W
PR
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N.Y.S. ROUTE 34B - PERUVILLE ROAD
PRESENT CENTERLINE
CENTERLINE
INTERSECTION
N 82°20'00" W 317.60'
N 80°25'00" W 323.12'
S 79°45'35" E 379.71' TOTAL
O.H
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.
O.
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.
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O.H.
O.H.
O.H.
O.H.
O.H.
BARN
DUPLEX
DUPLEX DUPLEX
DUPLEX
WELL
WELL
WELL
ASPHALT DRIVE
FOUND
R/W
R/
W
R/
W
HOOP
GRAVEL DRIVE
S
1
0
°
3
4
'
5
9
"
W
4
7
0
.
2
8
'
N 85°18'46" W 235.57
'
N
1
6
°
3
2
'
1
7
"
W
1
9
5
.
3
9
'
N 72°59'59"
W
5
8
4
.
9
6
'
PIN
SET
PIN
SET
PIN
SET
PIN
SET
(207.17' P TO P)
49.0'
±
"BUNKS"
BARN
TITLE INFORMATION
PINNEY PROPERTIES, LLC
P/O INSTRUMENT NO. 592955-003
TAX MAP PARCEL 30.-1-28.212
TOTAL 26.94 ACRES NET TO
ROAD RIGHT OF WAY
LIMIT OF DISTURBANCE
SDM RENTAL INC. (R.O.)
2022-06094
30.-1-28.214
EXISTING
NO
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T
H
P
E
R
M
A
P
R
E
F
E
R
E
N
C
E
N
O
.
1
"BUNKS"
"SAND"
"GABION"
"#2 STONE"
"SCREENED
"BANK RUN"
"MIX"
"SHOT R
O
C
K
"
"LARGE CONCRETE"
"CRUSH
"LARGE ASPHALT"
"ASPHALT MILLINGS"
CONCRETE""CRUSH
GRAVEL"
"TOP SOIL"
"CRUSH
LIMESTONE"
"NATIVE
CRUSH"
"#1 STONE"
GRAVEL"
POND
TOP OF BANK
3.25% SLOPE
6.
5
%
S
L
O
P
E
1.5%
S
L
O
P
E
2.3% S
L
O
P
E
1.5%
S
L
O
P
E
2.8% SLOPE
2.5% SLOPE
1.0% SLOPE
4.0% S
L
O
P
E
"BAN
K
R
U
N
"
"B
A
N
K
R
U
N
"
"TREES"
"TALL GRASS"
"TALL GRASS"
"TALL GRASS"
"TALL GRASS"
"TALL GRASS"
"TALL GRASS"
"TALL GRASS"
PaC
2026 AREA OF
DISTURBANCE
214,843-SF (4.93-AC)
74 73
75
Proposed Subcatchment - 1 (PSC-1)
Proposed Site Conditions - Area = 449,606 SF (10.32-AC)
Surface Conditions & Soils:
50.0% PaC, Hyrdologic Soil Group (HSG) A
50.0% KnA, CfB Hydrologic Soil Group (HSG) C
Runoff Curve Number = 30, Brush/Weeds/Grass, HSG A Soils
Runoff Curve Number = 65, Brush/Weeds/Grass, HSG C Soils
Runoff Curve Number = 98, Paved Parking and Roofs
Overland Stormwater Runoff - Longest Flowpath = 923 lf +/-
Sheet Flow, Dense Grass - 100 lf @ S = 1.0% avg.
Shallow Concentrated Flow, Unpaved - 823 lf @ S = 1.8% avg.
To Design Point 1 - (DP 1)
Longest Flo
w
p
a
t
h
72
Broadcrested Weir
8'L x 4'W x 1'D
4"-8" Stone Size
Inv. El. 75.50'
Drains naturally toward
Peruville R.O.W.
swale. (DP-1)
Increase volume of basin by
adding an additional
foot to volume.
Basin floor = 12,395-SF
w/8:1 slope
Hydraulic Runoff Modeling Results
1 Yr (2.00")10 Yr (3.41")100 Yr (5.85")
Existing 0.00 cfs (0.00 af)0.00 cfs (0.00 af)6.12 cfs (0.770 af)
Proposed 0.00 cfs (0.00 af)0.00 cfs (0.00 af)5.64 cfs (0.946 af)
DATE:
SCALE:
DRAWN:
JOB:
SHEET:
No
.
Da
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De
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1
3
0
9
2
6
0
7
4
2
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-
1
9
1
9
SY
M
.
1" = 50'
SDG
S-2
PI
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(T
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(
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6
)
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SEPT 18, 2026
5. STOCKPILES, BORROW AREAS AND SPOIL AREAS SHALL BE SHOWN ON THE PLANS AND
3. FILL MATERIAL SHALL BE FREE OF FROZEN PARTICLES, BRUSH, ROOTS,
SOD, OR OTHER FOREIGN OR OTHER OBJECTIONABLE MATERIALS
SHALL BE SUBJECT TO THE PROVISIONS OF THIS STANDARD AND SPECIFICATION.
ACCORDANCE WITH THE STANDARD AND SPECIFICATION FOR SUBSURFACE DRAIN
4. SEEPS OR SPRINGS ENCOUNTERED DURING CONSTRUCTION SHALL BE HANDLED IN
THAT WOULD INTERFERE WITH OR PREVENT CONSTRUCTION OF
2. ALL FILL TO BE PLACED AND COMPACTED IN LAYERS NOT TO EXCEED 9 INCHES
SUPPORT BUILDINGS, STRUCTURES AND CONDUITS, ETC. SHALL BE COMPACTED
1. ALL FILLS SHALL BE COMPACTED AS REQUIRED TO REDUCE EROSION, SLIPPAGE,
IN ACCORDANCE WITH LOCAL REQUIREMENTS OR CODES.
SETTLEMENT, SUBSIDENCE OR OTHER RELATED PROBLEMS. FILL INTENDED TO
OR OTHER APPROVED METHOD.
SATISFACTORY FILLS.
IN THICKNESS.
1. PHYSICALLY MARK LIMITS OF LAND DISTURBANCE ON THE SITE WITH
TAPE, SIGNS, OR ORANGE CONSTRUCTION FENCE, SO THAT WORKERS CAN
SEE THE AREAS TO BE PROTECTED.
2. DIVERT OFF-SITE RUNOFF FROM HIGHLY ERODIBLE SOILS AND STEEP
SLOPES TO STABLE AREAS.
3. CLEAR ONLY WHAT IS REQUIRED FOR IMMEDIATE CONSTRUCTION
ACTIVITY. LARGE PROJECTS SHOULD BE CLEARED AND GRADED AS
CONSTRUCTION PROGRESSES. AREAS EXCEEDING TWO ACRES IN SIZE
SHOULD NOT BE DISTURBED WITHOUT A SEQUENCING PLAN THAT REQUIRES
PRACTICES TO BE INSTALLED AND THE SOIL STABILIZED, AS DISTURBANCE
BEYOND THE TWO ACRES CONTINUES. MASS CLEARINGS AND GRADING OF
ENTIRE SITE SHOULD BE AVOIDED.
4. RESTABILIZE DISTURBED AREAS AS SOON AS POSSIBLE AFTER
CONSTRUCTION IS COMPLETED. ON SITES GREATER THAN TWO ACRES IN
SIZE, WAITING UNTIL ALL DISTURBED AREAS ARE READY FOR SEEDING IS
UNACCEPTABLE. FOURTEEN DAYS SHALL BE THE MAXIMUM EXPOSURE
PERIOD. MAINTENANCE MUST BE PERFORMED AS NECESSARY TO ENSURE
CONTINUED STABILIZATION. EXCEPT AS NOTED BELOW, ALL SITES SHALL BE
SEEDED AND STABILIZED WITH EROSION CONTROL MATERIALS, SUCH AS
STRAW MULCH, JUTE MESH, OR EXCELSIOR, INCLUDING AREAS WHERE
CONSTRUCTION HAS BEEN SUSPENDED OR SECTIONS COMPLETED:
A. FOR ACTIVE CONSTRUCTION AREAS SUCH AS BORROW OR
STOCKPILE AREAS, ROADWAY IMPROVEMENTS AND AREAS WITHIN 50 FT.
OF A BUILDING UNDER CONSTRUCTION, A PERIMETER SEDIMENT CONTROL
SYSTEM CONSISTING, FOR EXAMPLE, SILT FENCING, SHALL BE INSTALLED
AND MAINTAINED TO CONTAIN SOIL. EXPOSED DISTURBED AREAS
ADJACENT TO A CONVEYANCE THAT PROVIDES RAPID OFF-SITE DISCHARGE
OF SEDIMENT, SUCH AS A CUT SLOPE AT AN ENTRANCE, SHALL BE
COVERED WITH PLASTIC OR, GEOTEXTILE FABRIC TO PREVENT SOIL LOSS
UNTIL IT CAN BE STABILIZED. STABILIZED CONSTRUCTION ENTRANCES WILL
BE MAINTAINED TO CONTROL VEHICLE TRACKING MATERIAL OFF-SITE.
B. ON THE CUT SIDE OF ROADS, DITCHES SHALL BE STABILIZED
IMMEDIATELY WITH ROCK RIP-RAP OR OTHER NON-ERODIBLE LINERS (EG.
ROLLED EROSION PRODUCTS), OR WHERE APPROPRIATE, VEGETATIVE
MEASURES SUCH AS SOD.
C. PERMANENT SEEDING SHOULD OPTIMALLY BE UNDERTAKEN IN THE
SPRING FROM MARCH THROUGH MAY, AND IN LATE SUMMER AND EARLY
FALL FROM SEPTEMBER TO OCTOBER 15. DURING THE PEAK SUMMER
MONTHS AND IN THE FALL AFTER OCTOBER 15, WHEN SEEDING IS FOUND
TO BE IMPRACTICABLE, AN APPROPRIATE TEMPORARY MULCH SHALL BE
APPLIED. PERMANENT SEEDING MAY BE UNDERTAKEN DURING THE SUMMER
IF PLANS PROVIDE FOR ADEQUATE WATERING. TEMPORARY SEEDING WITH
RYE CAN BE UTILIZED THROUGH NOVEMBER.
D. ALL SLOPES STEEPER THAN 3:1 (H:V), OR 33.3%, AS WELL AS
PERIMETER DIKES, SEDIMENT BASINS AND TRAPS, AND EMBANKMENTS
SHALL, UPON COMPLETION, BE IMMEDIATELY STABILIZED WITH SOD, SEED
AND ANCHORED STRAW MULCH, OR OTHER APPROVED STABILIZATION
MEASURES. AREAS OUTSIDE OF THE PERIMETER SEDIMENT CONTROL
SYSTEM SHALL NOT BE DISTURBED. MAINTENANCE SHALL BE PERFORMED
AS NECESSARY TO ENSURE CONTINUED STABILIZATION.
E. TEMPORARY SEDIMENT TRAPPING DEVICES SHALL NOT BE
REMOVED UNTIL PERMANENT STABILIZATION IS ESTABLISHED IN ALL
CONTIRBUTORY DRAINAGE AREAS. SIMILARLY, STABILIZATION SHALL BE
ESTABLISHED PRIOR TO CONVERTING SEDIMENT TRAPS/BASINS INTO
PERMANENT (POST-CONSTRUCTION) STORMWATER MANAGEMENT
PRACTICES.
5. IF TEMPORARY WORK ROADS OR HAUL ROADS CROSS STREAM
CHANNELS, ADEQUATE WATERWAY OPENINGS SHALL BE CONSTRUCTED
USING SPANS, CULVERTS, WASHED ROCK BACKFILL, OR OTHER
ACCEPTABLE, CLEAN METHODS THAT WILL ENSURE THAT ROAD
CONSTRUCTION AND THEIR USE DO NOT RESULT IN TURBIDITY AND
SEDIMENT DOWNSTREAM. ALL CROSSING ACTIVITIES AND APPURTENANCES
ON STREAMS REGULATED BY ARTICLE 15 OF THE ENVIRONMENTAL
CONSERVATION LAW SHALL BE IN COMPLIANCE WITH A PERMIT ISSUED
PURSUANT TO ARTICLE 15 OF THE ECL.
6. MAKE SURE THAT ALL CONTRACTORS AND SUB-CONTRACTORS
UNDERSTAND THE ESC PLAN AND SIGN THE CERTIFICATION STATEMENT
REQUIRED BY NYSDEC GP.
7. DESIGNATE RESPONSIBLITY FOR THE ESC PLAN TO ONE INDIVIDUAL.
THIS PERSON SHALL BE NAMED IN THE NOTICE OF INTENT.
8. AN ESC PLAN INSPECTION PROGRAM MEETING THE REQUIREMENTS OF
THE NYSDEC GP, IS NECESSARY TO DETERMINE WHEN ESC MEASURES NEED
MAINTENANCE OR REPAIR. PAY PARTICULAR ATTENTION TO INSPECTIONS
REQUIRED AFTER RAINFALL. THE INSPECTION PROGRAM SHALL ALSO STATE
THE COMPLETION OF IDENTIFIED REPAIR AND MAINTENANCE ITEMS.
9. IF CONSTRUCTION ACTIVITIES CONTINUE DURING WINTER, ACCESS
POINTS SHOULD BE ENLARGED AND STABILIZED TO PROVIDE FOR SNOW
STOCKPILING. IN ADDITION SNOW MANAGEMENT PLAN SHOULD BE
PREPARED WITH ADEQUATE STORAGE AND CONTROL OF MELTWATER. A
MINIMUM 25 FOOT BUFFER SHALL BE MAINTAINED FROM PERIMETER
CONTROLS SUCH AS SILT FENCING. KEEP DRAINAGE STRUCTURES OPEN
AND FREE OF SNOW AND ICE DAMS. INSPECTION AND MAINTENANCE ARE
NECESSARY TO ENSURE THE FUNCTION OF THESE PRACTICES DURING
RUNOFF EVENTS.
EXCERPTS FROM NYS STANDARDS AND SPECIFICATIONS FOR EROSION AND SEDIMENT CONTROL
NOVEMBER 2016
GENERAL NOTES
NYS STANDARDS AND SPECIFICATIONS FOR EROSION
AND SEDMIMENT CONTROL, NOVEMBER 2016
LAND GRADING
SPECIFICATIONS
TOP SOILING
SPECIFICATIONS
1. PRESERVE EXISTING TOPSOIL IN PLACE WHERE POSSIBLE, THEREBY
REDUCING THE NEED FOR ADDED TOPSOIL.
2. AS NEEDED, INSTALL EROSION CONTROL PRACTICES SUCH AS
DIVERSIONS, CHANNELS, SEDIMENT TRAPS, AND STABILIZING MEASURES,
OR MAINTAIN IF ALREADY INSTALLED.
3. COMPLETE ROUGH GRADING AND FINAL GRADE, ALLOWING FOR DEPTH
OF TOPSOIL TO BE ADDED.
4. SCARIFY ALL COMPACT, SLOWLY PERMEABLE, MEDIUM AND FINE
TEXTURED SUBSOIL AREAS. SCARIFY AT APPROXIMATELY RIGHT ANGLES TO
THE SLOPE DIRECTION IN SOIL AREAS THAT ARE STEEPER THAN 5%. AREAS
THAT HAVE BEEN OVERLY COMPACTED SHALL BE DECOMPACTED TO A
MINIMUM DEPTH OF 12-INCHES WITH A DEEP RIPPER OR CHISEL PLOW
PRIOR TO TOPSOILING.
5. REMOVE REFUSE, WOODY PLANT PARTS, STONES OVER 3-INCHES IN
DIAMETER, AND OTHER LITTER.
6. TOPSOIL SHALL HAVE AT LEAST 6% BY WEIGHT OF FINE TEXTURED
STABLE ORGANIC MATERIAL, AND NO GREATER THAN 20%. MUCK SOIL
SHALL NOT BE CONSIDERED TOPSOIL.
7. TOPSOIL SHALL HAVE NOT LESS THAN 20% FINE TEXTURED MATERIAL
(PASSING THE NO. 200 SIEVE) AND NOT MORE THAN 15% CLAY.
8. TOPSOIL TREATED WITH SOIL STERILANTS OR HERBICIDES SHALL BE SO
IDENTIFIED TO THE PURCHASER.
9. TOPSOIL SHALL BE RELATIVELY FREE OF STONES OVER 1 1/2-INCHES IN
DIAMETER, TRASH, NOXIOUS WEEDS SUCH AS NUT SEDGE AND
QUACKGRASS, AND WILL HAVE LESS THAN 10% GRAVEL.
10. TOPSOIL CONTAINING SOLUBLE SALTS GREATER THAN 500 PARTS PER
MILLION SHALL NOT BE USED.
11. TOPSOIL SHALL BE DISTRIBUTED TO A UNIFORM DEPTH OVER THE
AREA. IT SHALL NOT BE PLACED WHEN IT IS PARTIALLY FROZEN, MUDDY, OR
ON FROZEN SLOPES OR OVER ICE, SNOW, OR STANDING WATER PUDDLES.
12. TOPSOIL PLACED AND GRADED ON SLOPES STEEPER THAN 5% SHALL
BE PROMPTLY FERTILIZED, SEEDED, MULCHED, AND STABILIZED BY
"TRACKING" WITH SUITABLE EQUIPMENT.
SECTION VIEW
MIRAFI 100X, STABILINKA T140N, OR APPROVED EQUIVALENT.
1. WOVEN WIRE FENCE TO BE FASTENED SECURELY TO FENCE POSTS WITH WIRE TIES
OR STAPLES. POSTS SHALL BE STEEL EITHER "T" OR "U" TYPE OR HARDWOOD.
LAPPED BY SIX INCHES AND FOLDED. FILTER CLOTH SHALL BE EITHER FILTER X,
3. WHEN TWO SECTIONS OF FILTER CLOTH ADJOIN EACH OTHER THEY SHALL BE OVER-
2. FILTER CLOTH TO BE TO BE FASTENED SECURELY TO WOVEN WIRE
FENCE SHALL BE WOVEN WIRE, 12 1/2 GAUGE, 6" MAXIMUM MESH OPENING.
FENCE WITH TIES SPACED EVERY 24" AT TOP AND MID SECTION.
4. PREFABRICATED UNITS SHALL BE GEOFAB, ENVIROFENCE, OR APPROVED EQUIVALENT.
5. MAINTENANCE SHALL BE PERFORMED AS NEEDED AND MATERIAL REMOVED WHEN
10' MAX. C. TO C.
WOVEN WIRE FENCE
(MIN. 14 1/2 GAUGE
W/ MAX. 6" MESH
SPACING)
CONSTRUCTION SPECIFICATIONS
"BULGES" DEVELOP IN THE SILT FENCE.
WOVEN WIRE FENCE (MIN. 14 1/2
GAUGE W/ MAX. 6" MESH SPACING)
WITH FILTER CLOTH
FLO
W
PERSPECTIVE VIEW
COMPACTED SOIL
36" MIN. FENCE POST
EMBED FILTER CLOTH
A MIN. OF 6" IN GROUND.
FLO
W
FLOW
SILT FENCE
UNDISTURBED GROUND
HEIGHT OF FILTER
= 16" MIN.
36" MIN. LENGTH FENCE
POSTS DRIVEN MIN. 16"
INTO GROUND.
20"MIN.
16"MIN.
8" MIN.
4"
SYMBOL
PROFILE
NOT TO SCALE
SAME ELEVATION
1. STONE WILL BE PLACED ON A FILTER FABRIC FOUNDATION TO THE LINES,
2. SET SPACING OF CHECK DAMS TO ASSUME THAT THE ELEVATIONS OF THE CREST
OF THE DOWNSTREAM DAM IS AT THE SAME ELEVATION OF THE TOE OF THE
3. EXTEND THE STONE A MINIMUM OF 1.5 FEET BEYOND THE DITCH BANKS TO
4. PROTECT THE CHANNEL DOWNSTREAM OF THE LOWEST CHECK DAM FROM SCOUR
AND EROSION WITH STONE OR LINER AS APPROPRIATE.
5. ENSURE THAT CHANNEL APPURTENANCES SUCH AS CULVERT ENTRANCES BELOW
CHECK DAMS ARE NOT SUBJECT TO DAMAGE OR BLOCKAGE FROM DISPLACED STONE.
CONSTRUCTION SPECIFICATIONS
9"MIN.
SECTION A-A
NOT TO SCALE
GRADES AND LOCATIONS SHOWN IN THE PLAN.
PREVENT CUTTING AROUND THE DAM.
MAXIMUM DRAINAGE AREA 2 ACRES.
CUTOFF TRENCH
18" WIDE
6" DEEP
UPSTREAM DAM.
FILTER
FABRIC
MIN.
1.5'
FILTER FABRIC
CUTOFF TRENCH
DESIGN BOTTOM
SPACING VARIES
DEPENDING ON
CHANNEL SLOPE
B
TOE
B
SLOPE
X
24" MAX
@ CENTER
CHECK DAM SYMBOL
SLOPE (FT/FT)
H (Ft)
1
SECTION B-B
NOT TO SCALE
X =
H
2
1
2
1
1
1
1
18"
A
A
24" MAX
@ CENTER
6"
CREST
SYMBOL
CONSTRUCTION SPECIFICATIONS
GRASSED/VEGETATED
SWALE G
PLAN VIEW
NOT TO SCALE
NEED NOT BE COMPACTED
POSITIVE DRAINAGE
18"MIN.
EXISTING
GROUND
18"MIN.
2'MIN.
SUFFICIENT GRADE TO DRAIN
CROSS SECTION
NOT TO SCALE
2'MIN.
FLOW
SLOPE
SEDIMENT & EROSION CONTROL MEASURES
TYPICAL
N.T.S.
DIV
E
R
S
I
O
N
DIV
E
R
S
I
O
N
SIL
T
F
E
N
C
E
SIL
T
F
E
N
C
E
D
D
D
D
BU
I
L
D
I
N
G
ST
O
C
K
P
I
L
E
OR
U
T
I
L
I
T
Y
EX
C
A
V
A
T
I
O
N
ST
A
B
I
L
I
Z
E
D
CO
N
S
T
R
U
C
T
I
O
N
EN
T
R
A
N
C
E
GRASSED/VEGETATED SWALE
1.DRAINAGE AREA SHALL BE LESS THAN 5 ACRES.
2.HEIGHT SHALL BE NO LESS THAN 18-INCHES FROM BOTTOM OF SWALE
TO TOP OF DIKE EVENLY DIVIDED BETWEEN DIKE HEIGHT AND SWALE
DEPTH.
3.BOTTOM WIDTH OF DIKE SHALL BE NO LESS THAN 2-FEET.
4.WIDTH OF SWALE SHALL BE NO LESS THAN 2-FEET.
5.SWALE SHALL HAVE POSITIVE DRAINAGE TO AN ADEQUATELY STABILIZED
OUTLET TO AN UNDISTURBED AREA. MAXIMUM ALLOWABLE GRADE NOT
TO EXCEED 8%.
6.THE DISTURBED AREA OF THE DIKE AND SWALE SHALL BE STABILIZED
WITHIN 7 DAYS OF INSTALLATION, IN ACCORDANCE WITH THE STANDARD
SPECIFICATIONS FOR TEMPORARY SWALES.
7.DIVERTED RUNOFF FROM A DISTURBED OR EXPOSED UPLAND AREA
SHALL BE CONVEYED TO A SEDIMENT TRAPPING DEVICE SUCH AS A
TRAP, BASIN, OR TO AN AREA PROTECTED BY ANY OF THESE PRACTICES
.
8.PERIODIC INSPECTION AND REQUIRED MAINTENANCE MUST BE PROVIDED
AFTER EACH RAIN EVENT.
MATERIAL
STOCKPILING
TEMPORARY CHECK DAMS
REMOVE AFTER 80% GERMINATION
SEE SITE PLAN
SYMBOL
CONSTRUCTION SPECIFICATIONS
DIVERSION SWALE
SECTION AS REQUIRED TO MEET THE CRITERIA SPECIFIED HEREIN, AND BE FREE OF
SHALL BE REMOVED AND DISPOSED OF SO AS NOT TO INTERFERE WITH THE
2. THE DIVERSION SHALL BE EXCAVATED OR SHAPED TO LINE, GRADE, AND CROSS
1. ALL TREES, BRUSH, STUMPS, OBSTRUCTIONS, AND OTHER OBJECTIONABLE MATERIAL
A. FOR DESIGN VELOCITIES OF LESS THAN 3.5 FT. PER. SEC., SEEDING AND
5. STABILIZATION SHALL BE DONE ACCORDING TO THE APPROPRIATE STANDARD
DISPOSED OF SO THAT IT WILL NOT INTERFERE WITH THE FUNCTIONING OF THE
4. ALL EARTH REMOVED AND NOT NEEDED IN CONSTRUCTION SHALL BE SPREAD OR
3. FILLS SHALL BE COMPACTED AS NEEDED TO PREVENT UNEQUAL SETTLEMENT THAT
BANK PROJECTIONS OR OTHER IRREGULARITIES WHICH WILL IMPEDE NORMAL FLOW.
DIVERSION OF THE WATER UNTIL THE VEGETATION IS ESTABLISHED.
EXCELSIOR MATTING OR WITH SEEDING AND MULCHING INCLUDING TEMPORARY
SHALL BE STABILIZED WITH SOD, WITH SEEDING PROTECTED BY JUTE OR
ENTERING THE DIVERSION DURING THE ESTABLISHMENT OF THE VEGETATION.
DIVERSIONS OR OTHER MEANS SHOULD BE USED TO PREVENT WATER FROM
IT IS RECOMMENDED THAT, WHEN CONDITIONS PERMIT, TEMPORARY
MULCHING MAY BE USED FOR THE ESTABLISHMENT OF THE VEGETATION.
PROPER FUNCTIONING OF THE DIVERSION.
DIVERSION.
B. FOR DESIGN VELOCITIES OF MORE THAN 3.5 FT. PER. SEC., THE DIVERSION
AND SPECIFICATIONS FOR VEGETATIVE PRACTICES.
WOULD CAUSE DAMAGE IN THE COMPLETE DIVERSION.
D
PARABOLIC CROSS-SECTION
TRAPEZOIDAL CROSS-SECTION
Z
1
WIDTH
Z
1D
b 4'MIN.
FREEBOARD
T
T/2
D
D/4
FREEBOARD
4'MIN.
WIDTH
1.FOR RESIDENTIAL CONSTRUCTION, ONE SPECIFIC AREA ON EACH LOT
SHALL BE DESIGNATED FOR TEMPORARY STOCKPILING OF TOPSOIL AND
ALL OTHER CONSTRUCTION MATERIALS CONTAINING FINES THAT CAN BE
MOVED BY RUNOFF. THIS AREA SHALL BE AS SMALL AS PRACTICABLE
.
2.STOCK PILES WILL HAVE DOWN HILL SIDE PERIMETER SILT FENCING
PROTECTION. REFERENCE SILT FENCE DETAILS THESE PLANS.
3.STOCK PILES WILL BE SEEDED AND MULCHED IF ANTICPATED TO BE LEFT
IN PLACE 14-DAYS OR MORE. REFERENCE DETAIL SHEET NOTES AND
SPECIFICATIONS THIS PLANT SET AND STORMWATER POLLUTION
PREVENTION PLAN (SWPPP) ACCOMPANYING THIS PLAN SET.
4.SILT FENCE AND OTHER TEMPORARY CONTROL MEASURES SHALL BE IN
PLACE BEFORE STOCKPILING OF MATERIALS.
CONSTRUCTION
SCE
SYMBOL
EXISTING PAVEMENT
STABILIZED
ENTRANCE
(OPTIONABLE)
MOUNTABLE BERM
12
'
M
I
N
.
GROUND
EXISTING
6" MIN.FILTER CLOTH
3'
12' MIN.
50' MIN.
50' MIN.
PAVEMENT
EXISTING
10
'
M
I
N
.
5:1
10
'
M
I
N
.
CONSTRUCTION SPECIFICATIONS
BE SUBJECT TO THE APPROVAL OF THE APPROPRIATE AUTHORITIES.
10. TEMPORARY CONSTRUCTION ENTRANCES, EXITS AND TEMPORARY ACCESS SHALL
9. PERIODIC INSPECTION AND NEEDED MAINTENANCE SHALL BE PROVIDED AFTER
WITH STONE AND WHICH DRAINS INTO AN APPROVED SEDIMENT TRAPPINGS
8. WHEN WASHING IS REQUIRED, IT SHALL BE DONE ON AN AREA STABILIZED
ONTO PUBLIC RIGHTS-OF-WAY MUST BE REMOVED IMMEDIATELY.
RIGHTS-OF-WAY. ALL SEDIMENT SPILLED, DROPPED, WASHED OR TRACTED
WHICH WILL PREVENT TRACKING OR FLOWING OF SEDIMENT ONTO PUBLIC
7. MAINTENANCE - THE ENTRANCE SHALL BE MAINTAINED IN A CONDITION
PIPING IS IMPRACTICAL, A MOUNTABLE BERM WITH 5:1 SLOPES WILL BE
CONSTRUCTION ENTRANCES SHALL BE PIPED ACROSS THE ENTRANCE. IF
6. SURFACE WATER - ALL SURFACE WATER FLOWING OR DIVERTED TOWARD
5. FILTER CLOTH - WILL BE PLACED OVER THE ENTIRE AREA PRIOR TO PLACING
AT POINTS WHERE INGRESS OR EGRESS OCCURS. TWENTY-FOUR (24) FOOT
4. WIDTH - TWELVE (12) FOOT MIN. BUT NOT LESS THAN THE FULL WIDTH
3. THICKNESS - NOT LESS THAN SIX (6) INCHES.
LOT WHERE A 30 FOOT MIN. LENGTH WOULD APPLY).
2. LENGTH - NOT LESS THAN 50 FEET (EXCEPT ON A SINGLE RESIDENCE
1. STONE SIZE - USE 2" STONE OR RECLAIMED OR RECYCLED CONCRETE
IF SINGLE ENTRANCE TO SITE.
EQUIVALENT.
EACH RAIN.
DEVICE.
PERMITTED.
OF STONE.
1. THE WASHOUT FACILITY SHOULD BE SIZED TO CONTAIN SOLIDS, WASHWATER AND RAINFALL
2. WASHWATER SHALL BE ESTIMATED AT 7 GALLONS PER CHUTE AND 50 GALLONS PER HOPPER
OF CONCRETE PUMP TRUCK AND/OR DISCHARGING DRUM.
3. THE MINIMUM SIZE SHALL BE 8' X 8' AT THE BOTTOM AND 2' DEEP. IF EXCAVATED, THE SIDE
4. LOCATE THE FACILITY A MINIMUM OF 100' FROM DRAINAGE SWALES, STORM DRAIN INLETS,
WETALANDS, STREAMS AND OTHER SURFACE WATERS. PREVENT SURFACE WATER FROM ENTERING THE
CONSTRUCTION SPECIFICATIONS
AND SIZED TO ALLOW FOR THE EVAPORATION OF THE WASHWATER AND RAINFALL.
SLOPES SHALL BNE 2 HORIZONTAL : 1 VERTICAL.
CONCRETE WASHOUT
STRUCTURE EXCEPT FOR THE ACCESS ROAD.
5. PROVIDE APPROPRIATE ACCESS WITH A GRAVEL ACCESS ROAD SLOPED DOWN TO STRUCTURE.
6. SIGNS SHALL BE PLACED TO DIRECT DRIVERS TO THE FACILITY AFTER THEIR LOAD IS DISCHARGED.
1. INSPECT ALL FACILITIES DAILY. REPAIR ALL DAMAGED OR LEAKING WASHOUT STATIONS IMMEDIATELY.
THE LINER SHALL BE PLASTIC SHEETING WITH A MIN. THICKNESS OF 10 MILS WITH NO HOLES OR TEARS.
ANCHOR THE LINER TO THE TOP OF THE PIT WITH AN EARTHEN BERM, SAND BAGS, STONE, ETC.
MAINTENANCE
2. PUMP OUT ANY ACCUMULATED RAINWATER OVER HARDENED CONCRETE.
3. ACCUMULATED HARDENED MATERIAL SHALL BE REMOVED WHEN 75% OF THE STORAGE CAPACITY OF
THE STRUCTURE IS FILLED.
4. DISPOSE OF HARDENED MATERIAL OFF-SITE IN A C/D LANDFILL. ON-SITE DISPOSAL IS ACCEPTABLE
IF IT HAS BEEN APPORVED AND ACCEPTED AS PART OF THE SWPPP.
5. REPLACE THE PLASTIC LINER WITH EACH CLEANING OF WASHOUT FACILITY.
6. INSPECT THE PROJECT SITE FREQUENTLY TO ENSURE THAT NO CONCRETE DISCHARGES ARE TAKING
PLACE IN NON-DESIGNATED AREAS.
DESIGN CRITERIA
DATE:
SCALE:
DRAWN:
JOB:
SHEET:
No
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SEPT 18, 2026
(T
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