Gagarin Place - Drainage Plan Set.pdf

PDF 4 MB Posted Sep 10, 2026

Attached to: Litchfield Housing Trust - Gagarin Place - Drainage Upgrades
Solicitation number: 38898
Issued by: Middlesex County, Connecticut

About this file

Written by GovTribe AI · Sep 11, 2026

This document is a comprehensive Drainage Plan Set prepared by Hrica Associates LLC for the Litchfield Housing Trust in Litchfield, Connecticut, consisting of three sheets detailing drainage infrastructure upgrades at Gagarin Place. The project encompasses the design and construction specifications for a complete stormwater management system including proposed PVC roof drains (4-inch and 6-inch), catch basins with silt sacs, trench drains, swales lined with 3-inch rock, lawn drains, and associated appurtenances. The plan incorporates elevation data, pipe sizing calculations, invert elevations, and drainage flow directions across multiple residential properties (numbered 3, 16, 18, 20, 22, and 24 Gagarin Place). The project includes erosion and sediment control measures such as erosion control blankets, geosynthetic silt fence, temporary seeding, topsoiling, riprap specifications, and construction entrance requirements. A pre-bid meeting is scheduled for September 22, 2026 at 10:00 AM at #20 Gagarin Place, with bids due by 2:00 PM on October 8, 2026, to be opened publicly at the Office of the First Selectman, 74 West Street, Litchfield, Connecticut.

The drainage plan incorporates detailed construction specifications referencing the 2024 Connecticut Guidelines for Soil Erosion and Sediment Control and Connecticut DOT standards for materials including cast iron H-20 rated catch basin grates, SDR-35 PVC pipe, HDPE pipe, and various stone materials graded to specifications. The plan specifies temporary construction phase erosion controls such as silt sacs, filter fabric protection for lawn drains, and construction entrance anti-tracking pads, with maintenance and inspection protocols required throughout the project. No bid fee is required for submission. The scope of work addresses stormwater drainage concerns across the residential development with particular attention to grade stabilization, wetlands protection (noting a 100-foot regulated area), and compatibility with existing wells and utilities shown on the site plan.

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Other files

File	Type	Posted
38898_Oct_27_26_solicitation_doc.pdf	PDF	Sep 10, 2026
Bid Package - Drainage - Gagarin Place - Sept 2026.pdf	PDF	Sep 10, 2026
38898_Oct_19_26_solicitation_doc.pdf	PDF	Sep 10, 2026
38898_Sep_11_26_solicitation_doc.pdf	PDF	Sep 10, 2026
38898_Oct_23_26_solicitation_doc.pdf	PDF	Sep 10, 2026

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AutoCAD SHX Text N/F LITCHFIELD FARMS, INC. VOL. 269 / PG. 457 VOL. 269 / PG. 457 VOL. 156 / PG. 41

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IPIPE FOUND

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PLACE

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GAGARIN

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(PRIVATE ROAD)

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#3 GAGARIN PLACE EXT.

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#16 GAGARIN PLACE

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GAGARIN

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#18 GAGARIN PLACE

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#20 GAGARIN PLACE

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#22 GAGARIN PLACE

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#24 GAGARIN PLACE

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AutoCAD SHX Text

EX. WELL

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AutoCAD SHX Text

EX. WELL

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AutoCAD SHX Text

EX. WELL

AutoCAD SHX Text EX. CCB TF = 1085.83 (2) 4" PVC (NORTH) INV. IN (BOTH)= 1082.43 4" PVC (WEST) INV. IN= 1082.23 4" PVC (EAST) INV. IN= 1082.63 12" HDPE INV. OUT= 1081.73 BOTTOM ELEV. = 1079.33 SUMP= 2.4'

AutoCAD SHX Text EX. CCB TF=1082.97 4" PVC (EAST) INV. IN= 1079.47 (3) 6" PVC (WEST) INV. IN= 1078.97±12" HDPE INV. OUT= 1078.47 BOTTOM ELEV.= 1076.47 SUMP= 2.0'

AutoCAD SHX Text EX. CCB TF=1090.88 4" PVC (EAST) INV. IN= 1087.88 6" PVC (WEST) INV. IN= 1087.88 12" HDPE INV. OUT= 1087.48 BOTTOM ELEV.= 1086.38 SUMP= 1.1'

AutoCAD SHX Text EX. LAWN DRAIN (24") TF=1087.75 4" PVC (EAST) INV. IN= 1085.75 4" PVC (WEST) INV. IN= 1086.55 12" HDPE INV. IN= 1085.55 12" HDPE INV. OUT= 1085.25 BOTTOM ELEV.= 1084.85 SUMP= 0.4'

AutoCAD SHX Text

EX. LAWN DRAIN (12") TF=1087.8 4" PVC OUT = 1087.1 BOTTOM ELEV.= 1085.5

AutoCAD SHX Text EX. LAWN DRAIN (12"x12") TF=1088.54 4" PVC OUT = 1087.94 BOTTOM ELEV.= 1087.54

AutoCAD SHX Text W

AutoCAD SHX Text

EX. WELL

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AutoCAD SHX Text PROP. 12" LAWN DRAIN TF = 1086.1 4" RD INV. IN = 1085.4 (BOTH) 4" INV. OUT = 1085.2

AutoCAD SHX Text

HIGH POINT 1086+6

AutoCAD SHX Text EX. LAWN DRAIN TO BE LOWERED 6" TF = 1087.3 TRENCH DRAIN INV. IN = 1086.6 4" PVC OUT = 1086.5 BOTTOM ELEV. = 1085.0

AutoCAD SHX Text

BERM ELEVATION TO BE RAISED TO 1092.5

AutoCAD SHX Text 1092+5

AutoCAD SHX Text

3' WIDE BASE

AutoCAD SHX Text 1088+5

AutoCAD SHX Text 1088+4

AutoCAD SHX Text

HP 1088+3

AutoCAD SHX Text 1088+6

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PROP. DS

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EX. DS TO BE ELIMINATED AND ROOF GUTTER PITCH DIRECTION TO BE REVERSED

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EX. DS TO BE ELIMINATED AND ROOF GUTTER PITCH DIRECTION TO BE REVERSED

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PROP. DS

AutoCAD SHX Text EXISTING SWALE TO BE RESHAPED AS SHOWN (1.5' WIDE, 6" DEEP) & TO BE LINED WITH 3" ROCK

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PROP. INV. = 1082.0

AutoCAD SHX Text EXISTING SWALE TO BE RESHAPED AS SHOWN (3' WIDE BASE, 1' DEEP) & TO BE LINED WITH 3" ROCK

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EX. DS TO BE ELIMINATED AND ROOF GUTTER PITCH DIRECTION TO BE REVERSED

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PROP. RD

AutoCAD SHX Text EXISTING MODIFIED RIPRAP TO BE REMOVED AND REPLACED WITH 3" ROCK WITH KNOCKOUTS CLEAR FOR STORMWATER FLOW

AutoCAD SHX Text EXISTING SWALE TO BE RESHAPED AS SHOWN (1.5' WIDE, 6" DEEP) & TO BE LINED WITH 3" ROCK

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EX. DS TO BE ELIMINATED AND ROOF GUTTER PITCH DIRECTION TO BE REVERSED

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EX. DS TO BE ELIMINATED AND ROOF GUTTER PITCH DIRECTION TO BE REVERSED

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PROP. DS

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PROP. DS

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INV. = 1079.5

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PROP. 4" PVC RD (TYP.)

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PROP. 6" PVC TRUNK LINE

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PROP. 4" PVC RD

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PROP. 4" PVC RD

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PROP. 4" PVC RD

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PROP. 6" PVC TRUNK LINE

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PROP. 4" PVC RD

AutoCAD SHX Text L=12'±

AutoCAD SHX Text L=10'±

AutoCAD SHX Text L=56'±

AutoCAD SHX Text L=14'±

AutoCAD SHX Text L=74'±

AutoCAD SHX Text L=12'±

AutoCAD SHX Text 6'±

AutoCAD SHX Text L=80'±

AutoCAD SHX Text 6'±

AutoCAD SHX Text L=55'±

AutoCAD SHX Text L=32'±

AutoCAD SHX Text 3'±

AutoCAD SHX Text L=26'±

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PROP. 4" PVC RD

AutoCAD SHX Text L=10'±

AutoCAD SHX Text L=12'±

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PROP. 4" PERF. PVC TRENCH DRAIN L=50'

AutoCAD SHX Text L=12'±

AutoCAD SHX Text L=16'±

AutoCAD SHX Text L=45'±

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EX. PORCH

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EX. PORCH

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EX. PORCH

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EX. PORCH

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EX. PORCH

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EX. GRAVEL DRIVEWAY

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EX. GRAVEL DRIVEWAY

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EX. GRAVEL DRIVEWAY

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EX. GRAVEL DRIVEWAY

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EX. GRAVEL DRIVEWAY

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EX. BIT. SIDEWALK

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EX. BIT. SIDEWALK

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EX. BIT. SIDEWALK

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EX. BIT. SIDEWALK

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EX. BIT. SIDEWALK

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EX. BIT. SIDEWALK

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EX. BIT. SIDEWALK

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EX. BIT. SIDEWALK

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EX. BIT. SIDEWALK

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EX. BIT. SIDEWALK

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EX. ELECTRICAL UTILITIES

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EX. ELECTRICAL UTILITIES

AutoCAD SHX Text EXISTING MODIFIED RIPRAP TO BE REMOVED AND REPLACED WITH 3" ROCK. EXISTING KNOCKOUT TO BE CLEAR FOR STORMWATER FLOW

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PROP. 6" SWALE

AutoCAD SHX Text 1087+5

AutoCAD SHX Text 1088.2

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GRADE TO DRAIN

AutoCAD SHX Text 1088+5

AutoCAD SHX Text 1088+2

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GRADE TO DRAIN

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EX. SHED

AutoCAD SHX Text 1088.4

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EX. SHED

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EX. SHED

AutoCAD SHX Text

EX. SHED

AutoCAD SHX Text

EX. SHED

AutoCAD SHX Text 1086.7

AutoCAD SHX Text 1086.4

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PROP. INV. = 1084.4

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PROP. INV. = 1083.6

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EX. LAWN DRAIN (12") TF=1085.83 4" PVC OUT = 1085.23 BOTTOM ELEV.= 1083.43

AutoCAD SHX Text EX. LAWN DRAIN (12"x12") TF=1086.16 4" PVC IN = 1085.46 4" PVC OUT = 1085.41 BOTTOM ELEV.= 1085.16

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PROP. INV. = 1085.5

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(KNOCKOUTS TO BE CLEARED OF RIPRAP AND DEBRIS)

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EX. WELL

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EXISTING RIPRAP (EX. RR)(TYP.)

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EX. RR

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EX. RR

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EX. RR

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EX. ELECTRICAL UTILITIES

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EX. RR

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PROP. CLEANOUT INV. = 1087.1

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EX. PATIO

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AC PAD

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AC PAD

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AC PAD

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AC PAD

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AC PAD

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EX. PATIO

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EX. PATIO

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EX. PATIO

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EX. PATIO

AutoCAD SHX Text L=8'±

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PROP. 4" PVC RD (TYP.)

AutoCAD SHX Text L=16'±

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PROP. 6" PVC TRUNK LINE

AutoCAD SHX Text L=2'±

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PROP. 4" PVC RD

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BERM

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BERM

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BERM

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EXISTING MODIFIED RIPRAP TO BE REMOVED

AutoCAD SHX Text 2.3%

AutoCAD SHX Text 3.0%

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SWALE TO BE RESHAPED AND LINED WITH 3" ROCK

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ELEV. = 1086.9

AutoCAD SHX Text L=21'±

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PROP. 4" PVC RD

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APPROX. LOCATION OF EX. WETLAND RECHARGE UNIT (GWR)(TYP.)

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4" PVC

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4" PVC

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GWR

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GWR

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GWR

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GWR

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GWR

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GWR

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PROPERTY LINE

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LEASE LINE

AutoCAD SHX Text 1091+5

AutoCAD SHX Text 1091+7

AutoCAD SHX Text

AutoCAD SHX Text 1091+0

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GRADE TO DRAIN

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GRADE TO DRAIN

AutoCAD SHX Text ALL GRADING SHALL DRAIN STORMWATER AWAY FROM BUILDINGS TOWARDS EXISTING OR PROPOSED DRAINAGE STRUCTURES AS SHOWN

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GRADE SO THAT EX. LAWN DRAIN IS LOW POINT

AutoCAD SHX Text EXISTING MODIFIED RIPRAP TO BE REMOVED AND REPLACED WITH 3" ROCK WITH KNOCKOUTS CLEAR FOR STORMWATER FLOW

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EX. MAILBOX

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PROP INV. (FROM #18)= 1086.6 (FROM #20)= 1085.9

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100' WETLANDS REGULATED AREA

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WETLANDS AREA

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WETLANDS AREA

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100' WETLANDS REGULATED AREA

AutoCAD SHX Text EX. CCB TF=1085.10 4" PVC (EAST) INV. IN= 1082.80 4" PVC (WEST) INV. IN= 1082.80 12" HDPE INV. OUT= 1082.60 BOTTOM ELEV.= 1079.10 SUMP= 3.5'

AutoCAD SHX Text

C1 OF 3

AutoCAD SHX Text Surveyors

AutoCAD SHX Text Hrica Associates LLC

AutoCAD SHX Text 860-567-0491 (facsimile)

AutoCAD SHX Text 860-567-2112 (business)

AutoCAD SHX Text hricaassociates@optonline.net

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SHEET #:

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SCALE:

AutoCAD SHX Text 1"=20 ft.

AutoCAD SHX Text 11-0365

AutoCAD SHX Text 110365

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PROJECT #:

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DRAWING:

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CHECKED BY:

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DRAWN BY:

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KSH

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TJS

AutoCAD SHX Text 09/08/2026

AutoCAD SHX Text Kenneth S. Hrica, PE,RLS

AutoCAD SHX Text Engineers

AutoCAD SHX Text Litchfield, Connecticut 06759

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DATE:

AutoCAD SHX Text 44 Maple View Trail

AutoCAD SHX Text P.O. Box 1861

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MAP #:

AutoCAD SHX Text e-mail:

AutoCAD SHX Text

LITCHFIELD HOUSING TRUST, INC.

AutoCAD SHX Text

LITCHFIELD, CONNECTICUT

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TORRINGTON ROAD

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GAGARIN PLACE

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INCHES

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TC#3-15

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MAGNETIC JUNE 2012

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TRUE NORTH

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LEGEND

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PROPERTY LINE

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EXISTING IRON PIN OR PIPE

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EXISTING CONTOUR

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PROPOSED CONTOUR

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EXISTING SPOT ELEVATION

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PROPOSED SPOT ELEVATION

AutoCAD SHX Text 311.5

AutoCAD SHX Text 311+5

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CATCH BASIN

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DRAINAGE PLAN

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TRENCH DRAIN CLEANOUT DETAIL

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3'- 0" MIN.

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PIPE

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END OF

AutoCAD SHX Text 7"

AutoCAD SHX Text

4"%%C PVC 45%%D

AutoCAD SHX Text N.T.S.

AutoCAD SHX Text

FLOW

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PVC WYE

AutoCAD SHX Text 4"%%C x 4"%%C

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SWEEP ELBOW

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REQUIRED

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LENGTH AS

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OR CRUSHED STONE

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3/4" SCREENED GRAVEL

AutoCAD SHX Text 6"

AutoCAD SHX Text 3"%%p

AutoCAD SHX Text 9"

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FRAME & COVER

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CAST IRON

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FINISHED GRADE

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CURTAIN DRAIN

AutoCAD SHX Text

4"%%C SDR35 PVC

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PVC PIPE

AutoCAD SHX Text 4"%%c SDR35

AutoCAD SHX Text

FILTER FABRIC LAYER

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1 " BROKEN STONE14" BROKEN STONE

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4" PERF SDR-35 PVC

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TRENCH DRAIN DETAIL

AutoCAD SHX Text N.T.S.

AutoCAD SHX Text

12" LAWN DRAIN

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SDR-35 SEWER

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ULTRA-RIB PVC

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CORRUGATED POLYETHYLENE

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A-2000 CORRUGATED PVC

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FOR:

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CAST IRON H-20

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RATED GRATE

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DOT RATING

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SLAB REQUIRED

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4" THRU 12"

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INLET AND OUTLET

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OUTLETS WITH

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VARIOUS TYPES OF

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WITH A BLACK PAINT

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NO ADDITIONAL CONCRETE

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H-20 RATED PVC BODY;

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ADAPTORS AVAILABLE

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WATERTIGHT ADAPTORS

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GRATE HAS H-20 (HEAVY TRAFFIC)

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QUALITY: MATERIAL SHALL

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CONFORM TO ASTM A48 - CLASS 30B

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PAINT: CASTINGS ARE FURNISHED

AutoCAD SHX Text 3"

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OVERALL HEIGHT 10'

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RECOMMENDED

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*(1) MAXIMUM

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VARIABLE OVERALL HEIGHT *(1)

AutoCAD SHX Text 3"

AutoCAD SHX Text 12"

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UP TO 10"

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MOUNTED ON ANY

AutoCAD SHX Text ANGLE 0%%d TO 359%%d

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ADAPTORS CAN BE

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VARIES

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EXISTING ROOF DOWN SPOUT

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AutoCAD SHX Text W

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WELL

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LEASE LINE

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PROPOSED PVC ROOF DRAIN

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(LENGTH AS SHOWN)

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PVC RD

AutoCAD SHX Text L=X'%%P

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BERM ELEV. = 1092.5

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1' THICK LAYER OF 3" STONE

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3:1 SLOPE TO LAWN AREA

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TF ELEV. = 1090.8

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3' WIDE, 1' DEEP SWALE

AutoCAD SHX Text N.T.S.

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%%USWALE DETAIL

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NOTE: EXISTING TRENCH DRAIN UNDER SWALE TO REMAIN UNDISTURBED

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FILTER FABRIC

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GRADE SWALE TO MATCH EXISTING BASIN KNOCKOUTS

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EXISTING CATCH BASIN TO REMAIN

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NOT VALID WITHOUT ORIGINAL SEAL

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FLAGGED WETLANDS

N/F LITCHFIELD FARMS, INC. VOL. 269 / PG. 457 VOL. 269 / PG. 457 VOL. 156 / PG. 41

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IPIPE FOUND

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PLACE

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GAGARIN

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(PRIVATE ROAD)

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#3 GAGARIN PLACE EXT.

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#16 GAGARIN PLACE

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GAGARIN

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#18 GAGARIN PLACE

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#20 GAGARIN PLACE

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#22 GAGARIN PLACE

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#24 GAGARIN PLACE

AutoCAD SHX Text W

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EX. WELL

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AutoCAD SHX Text

EX. WELL

AutoCAD SHX Text W

AutoCAD SHX Text

EX. WELL

AutoCAD SHX Text W

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EX. WELL

AutoCAD SHX Text

HIGH POINT 1086+6

AutoCAD SHX Text 1092+5

AutoCAD SHX Text

3' WIDE BASE

AutoCAD SHX Text 1088+5

AutoCAD SHX Text 1088+4

AutoCAD SHX Text

HP 1088+3

AutoCAD SHX Text 1088+6

AutoCAD SHX Text

EX. PORCH

AutoCAD SHX Text

EX. PORCH

AutoCAD SHX Text

EX. PORCH

AutoCAD SHX Text

EX. PORCH

AutoCAD SHX Text

EX. PORCH

AutoCAD SHX Text

EX. GRAVEL DRIVEWAY

AutoCAD SHX Text

EX. GRAVEL DRIVEWAY

AutoCAD SHX Text

EX. GRAVEL DRIVEWAY

AutoCAD SHX Text

EX. GRAVEL DRIVEWAY

AutoCAD SHX Text

EX. GRAVEL DRIVEWAY

AutoCAD SHX Text

EX. BIT. SIDEWALK

AutoCAD SHX Text

EX. BIT. SIDEWALK

AutoCAD SHX Text

EX. BIT. SIDEWALK

AutoCAD SHX Text

EX. BIT. SIDEWALK

AutoCAD SHX Text

EX. BIT. SIDEWALK

AutoCAD SHX Text

EX. BIT. SIDEWALK

AutoCAD SHX Text

EX. BIT. SIDEWALK

AutoCAD SHX Text

EX. BIT. SIDEWALK

AutoCAD SHX Text

EX. BIT. SIDEWALK

AutoCAD SHX Text

EX. BIT. SIDEWALK

AutoCAD SHX Text

EX. ELECTRICAL UTILITIES

AutoCAD SHX Text

EX. ELECTRICAL UTILITIES

AutoCAD SHX Text

PROP. 6" SWALE

AutoCAD SHX Text 1087+5

AutoCAD SHX Text 1088.2

AutoCAD SHX Text

GRADE TO DRAIN

AutoCAD SHX Text 1088+5

AutoCAD SHX Text 1088+2

AutoCAD SHX Text

GRADE TO DRAIN

AutoCAD SHX Text

EX. SHED

AutoCAD SHX Text 1088.4

AutoCAD SHX Text

EX. SHED

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EX. SHED

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EX. SHED

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EX. SHED

AutoCAD SHX Text 1086.7

AutoCAD SHX Text 1086.4

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AutoCAD SHX Text W

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EX. WELL

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EXISTING RIPRAP (EX. RR)(TYP.)

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EX. RR

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EX. RR

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EX. RR

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EX. ELECTRICAL UTILITIES

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EX. RR

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EX. PATIO

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AC PAD

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AC PAD

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AC PAD

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AC PAD

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AC PAD

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EX. PATIO

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EX. PATIO

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EX. PATIO

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EX. PATIO

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BERM

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BERM

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BERM

AutoCAD SHX Text 2.3%

AutoCAD SHX Text 3.0%

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ELEV. = 1086.9

AutoCAD SHX Text L=21'±

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APPROX. LOCATION OF EX. WETLAND RECHARGE UNIT (GWR)(TYP.)

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GWR

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GWR

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GWR

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GWR

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GWR

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GWR

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PROPERTY LINE

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LEASE LINE

AutoCAD SHX Text 1091+5

AutoCAD SHX Text 1091+7

AutoCAD SHX Text

AutoCAD SHX Text 1091+0

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GRADE TO DRAIN

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GRADE TO DRAIN

AutoCAD SHX Text

EX. MAILBOX

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(SS)

AutoCAD SHX Text CATCH BASINS TO BE EQUIPPED WITH A SILT SAC (SS)(TYP.) CAPTURE DEVICE (OR EQUAL) DURING CONSTRUCTION AND LAWN DRAINS TO BE FITTED WITH A TEMPORARY LOW-PERMITTIVITY FILTER FABRIC (FF)(TYP) (SEE DETAILS)

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LANDLOK S2 EROSION CONTROL BLANKET (ECB) (OR EQUAL)

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ECB

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ECB

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ECB

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ECB

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ECB

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(SS)

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(SS)

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(SS)

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(FF)

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(FF)

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(FF)

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(FF)

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(FF)

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(MS)

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(PS)

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(TO)

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(MS)

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(PS)

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(TO)

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(MS)

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(PS)

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(TO)

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(MS)

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(PS)

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(TO)

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(MS)

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(PS)

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(TO)

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(RR)

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(RR)

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(RR)

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(RR)

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(RR)

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(RR)

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(MS)

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(TS)

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TOPSOIL STOCKPILE

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50' ANTI-TRACKING PAD CONSTRUCTION ENTRANCE

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(CE)

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REPAIR PAVEMENT DAMAGE (IF ANY OCCURS DURING CONSTRUCTION)

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(FF)

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CAST IRON H-20

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RATED GRATE

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DOT RATING

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WITH A BLACK PAINT

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GRATE HAS H-20 (HEAVY TRAFFIC)

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QUALITY: MATERIAL SHALL

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CONFORM TO ASTM A48 - CLASS 30B

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PAINT: CASTINGS ARE FURNISHED

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C2 OF 3

AutoCAD SHX Text Surveyors

AutoCAD SHX Text Hrica Associates LLC

AutoCAD SHX Text 860-567-0491 (facsimile)

AutoCAD SHX Text 860-567-2112 (business)

AutoCAD SHX Text hricaassociates@optonline.net

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SHEET #:

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SCALE:

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AutoCAD SHX Text 11-0365

AutoCAD SHX Text 110365

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PROJECT #:

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DRAWING:

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CHECKED BY:

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DRAWN BY:

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KSH

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TJS

AutoCAD SHX Text 09/08/2026

AutoCAD SHX Text Kenneth S. Hrica, PE,RLS

AutoCAD SHX Text Engineers

AutoCAD SHX Text Litchfield, Connecticut 06759

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DATE:

AutoCAD SHX Text 44 Maple View Trail

AutoCAD SHX Text P.O. Box 1861

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MAP #:

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LITCHFIELD HOUSING TRUST, INC.

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LITCHFIELD, CONNECTICUT

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TORRINGTON ROAD

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GAGARIN PLACE

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INCHES

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TC#3-15

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MAGNETIC JUNE 2012

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TRUE NORTH

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LEGEND

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PROPERTY LINE

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EXISTING IRON PIN OR PIPE

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EXISTING CONTOUR

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PROPOSED CONTOUR

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EXISTING SPOT ELEVATION

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PROPOSED SPOT ELEVATION

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CATCH BASIN

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EXISTING ROOF DOWN SPOUT

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WELL

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LEASE LINE

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PROPOSED PVC ROOF DRAIN

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(LENGTH AS SHOWN)

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PVC RD

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EROSION & SEDIMENT CONTROL PLAN

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SILTSACK

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SPECIFICATIONS

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NOTE: THE SILTSACK WILL BE MANUFACTURED FROM A WOVEN POLYPROPYLENE

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FABRIC THAT MEETS OR EXCEEDS THE FOLLOWING SPECIFICATIONS.

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REGULAR FLOW SILTSACK

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(FOR AREAS OF LOW TO MODERATE PRECIPITATION AND RUN-OFF)

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PROPERTIES TEST METHOD UNITS

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GRAB TENSILE STRENGTH

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GRAB TENSILE ELONGATION

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PUNCTURE

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MULLEN BURST

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TRAPEZOID TEAR

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UV RESISTANCE

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APPARENT OPENING SIZE

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FLOW RATE

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PERMITTIVITY

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HI-FLOW SILTSACK

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(FOR AREAS OF MODERATE TO HEAVY PRECIPITATION AND RUN-OFF)

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ASTM D-4632

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ASTM D-4632

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ASTM D-4833

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ASTM D-3786

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ASTM D-4533

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ASTM D-4355

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ASTM D-4751

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ASTM D-4491

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ASTM D-4491

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300 LBS

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120 LBS

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800 PSI

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120 LBS

AutoCAD SHX Text 80 %

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40 US SIEVE

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40 GAL/MIN/SQ FT

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0.55 SEC -1

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OIL-ABSORBANT SILTSACK

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(FOR AREAS WHERE THERE IS A CONCERN FOR OIL RUN-OFF OR SPILLS)

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DEPENDING ON YOUR PARTICULAR APPLICATION, THE SILTSACK CAN BE MADE FROM

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EITHER ONE OF THE ABOVE FABRICS WITH AN OIL-ABSORBANT PILLOW INSERT OR,

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MADE COMPLETELY FROM AN OIL-ABSORBANT SILTSACK , WITH A WOVEN PILLOW INSERT.

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1.5 SEC -1

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200 GAL/MIN/SQ FT

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20 US SIEVE

AutoCAD SHX Text 90 %

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45 LBS

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420 PSI

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135 LBS

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265 LBS

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ASTM D-4491

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ASTM D-4491

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ASTM D-4751

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ASTM D-4355

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ASTM D-4533

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ASTM D-3786

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ASTM D-4833

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ASTM D-4632

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ASTM D-4632

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PERMITTIVITY

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FLOW RATE

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APPARENT OPENING SIZE

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UV RESISTANCE

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TRAPEZOID TEAR

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MULLEN BURST

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PUNCTURE

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GRAB TENSILE ELONGATION

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GRAB TENSILE STRENGTH

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PROPERTIES TEST METHOD UNITS

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FOAM

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CURB OPENING

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1" REBAR FOR BAG REMOVAL FROM INLET (REBAR NOT INCLUDED)

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DUMP LOOPS (REBAR NOT INCLUDED)

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OPTIONAL OVERFLOW

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EXPANSION RESTRAINT

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SILTSACK CATCH BASIN SEDIMENT CAPTURE DEVICE

AutoCAD SHX Text -HANGING FRAME UNDER-THE-GRATE INSTALLATION -MODIFY CATCH BASIN FRAME AS NECESSARY

AutoCAD SHX Text TEMPORARY HIGH PERMITTIVITY FILTER FABRIC TO BE USED UNDER THE FRAME OF EXISTING AND PROPOSED LAWN DRAINS DURING CONSTRUCTION TO FILTER SEDIMENT FROM STORMWATER

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LAWN DRAIN FILTER FABRIC PROTECTION DETAIL

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SRW PRODUCTS SRW NW4 HIGH-PERMITTIVITY WOVEN GEOTEXTILE FILTER FABRIC (OR EQUAL)

AutoCAD SHX Text 12"

AutoCAD SHX Text N.T.S.

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SLOPE STABILIZATION DETAIL

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LANDLOK S2 EROSION CONTROL BLANKET (ECB)

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OR EQUIVALENT

AutoCAD SHX Text SPECIFICATIONS SITE PREPARATION AND INSTALLATION -PREPARE THE SURFACE, REMOVING PROTRUDING OBJECTS AND INSTALL TEMPORARY EROSION CONTROL BLANKETS IN ACCORDANCE WITH THE MANUFACTURER'S RECOMMENDATION. ENSURE THAT THE ORIENTATION AND ANCHORING OF THE BLANKET IS APPROPRIATE FOR THE SITE. -THE BLANKET CAN BE LAID OVER AREAS WHERE SPRIGGED GRASS SEEDLINGS HAVE BEEN INSERTED INTO THE SOIL. WHERE LANDSCAPE PLANTINGS ARE PLANNED, LAY THE BLANKET FIRST AND THEN PLANT THROUGH THE BLANKET IN ACCORDANCE WITH LANDSCAPE PLANTING MEASURE. -INSPECT THE INSTALLATION TO INSURE THAT ALL LAP JOINTS ARE SECURE, ALL EDGES ARE PROPERLY ANCHORED AND ALL STAKING OR STAPLING PATTERNS FOLLOW MANUFACTURER'S RECOMMENDATIONS. MATERIALS TEMPORARY EROSION CONTROL BLANKETS SHALL BE COMPOSED OF FIBERS AND/OR FILAMENTS THAT: AND/OR FILAMENTS THAT: -ARE BIODEGRADABLE OR PHOTODEGRADABLE WITHIN TWO YEARS BUT WITHOUT SUBSTANTIAL DEGRADATION OVER THE PERIOD OF INTENDED USAGE. (FIVE MONTHS MAXIMUM) -ARE MECHANICALLY, STRUCTURALLY AND CHEMICALLY BOUND TOGETHER TO FORM A CONTINUOUS MATRIX OF EVEN THICKNESS AND DISTRIBUTION THAT RESIST RAINDROP SPLASH AND WHEN USED WITH SEEDINGS ALLOWS VEGETATION TO PENETRATE THE BLANKET. -ARE OF SUFFICIENT STRUCTURAL STRENGTH TO WITHSTAND STRETCHING OR MOVEMENT BY WIND OR WATER WHEN INSTALLED IN ACCORDANCE WITH THE MANUFACTURER'S RECOMMENDATIONS. -ARE FREE OF ANY SUBSTANCE TOXIC TO PLANT GROWTH AND UNPROTECTED HUMAN SKIN OR WHICH INTERFERES WITH SEED GERMINATION. -CONTAIN NO CONTAMINANTS THAT POLLUTE THE AIR OR WATERS OF THE STATE WHEN PROPERLY APPLIED AND PROVIDE EITHER 80%-90% SOIL COVERAGE WHEN USED AS A SUBSTITUTE FOR MULCH FOR SEED OR 100% INITIAL SOIL COVERAGE WHEN USED AS A SUBSTITUTE FOR TEMPORARY SOIL INITIAL SOIL COVERAGE WHEN USED AS A SUBSTITUTE FOR TEMPORARY SOIL PROTECTION MEASURE. APPLICATION -ON DISTRIBUTED SOILS WHERE SLOPES ARE 2:1 OR FLATTER -WHERE WIND AND TRAFFIC GENERATED AIR FLOW MAY DISLODGE STANDARD, UNARMORED MULCHES -MAY BE USED AS A SUBSTITUTE FOR TEMPORARY SOIL PROTECTION -MAY BE USED AS A SUBSTITUTE FOR MULCH FOR SEED MAINTENANCE -INSPECT TEMPORARY EROSION CONTROL BLANKETS AT LEAST ONCE A WEEK AND WITHIN 24 HOURS OF THE END OF A STORM WITH A RAINFALL AMOUNT OF 0.5 INCH OR GREATER FOR FAILURES. BLANKET FAILURE HAS OCCURRED WHEN (1) SOILS AND/OR SEED HAVE WASHED AWAY FROM BENEATH THE BLANKET AND THE SOIL SURFACE CAN BE EXPECTED TO CONTINUE TO ERODE AT AN ACCELERATED RATE, AND/OR (2) THE BLANKET HAS BECOME DISLODGED FROM THE SOIL SURFACE OR IS TORN. -IF WASHOUTS OR BREAKOUTS OCCUR, RE-INSTALL THE BLANKET AFTER RE-GRADING AND RE-SEEDING, ENSURING THAT BLANKET INSTALLATION STILL MEETS STILL MEETS DESIGN SPECIFICATIONS. WHEN REPETITIVE FAILURE OCCUR AT THE SAME LOCATION, REVIEW CONDITIONS AND LIMITATION FOR USE AND DETERMINE IF DIVERSIONS, STONE CHECK DAMS OR OTHER MEASURE ARE NEEDED TO REDUCE FAILURE RATE. -WHEN USED AS A SUBSTITUTE FOR MULCH FOR SEED, CONTINUE TO INSPECT AS REQUIRED BY THE SEEDING MEASURE. WHEN USED AS A SUBSTITUTE FOR INSPECT AS REQUIRED BY THE SEEDING MEASURE. WHEN USED AS A SUBSTITUTE FOR TEMPORARY SOIL PROTECTION CONTINUE TO INSPECT UNTIL IT IS REPLACED BY OTHER EROSION CONTROL MEASURES OR UNTIL WORK RESUMES.

AutoCAD SHX Text 6"

AutoCAD SHX Text 12"

AutoCAD SHX Text 4"

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30' MAX.

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TEMPORARY SEEDING

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(TS)

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GUIDELINES.

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FOR PROPER USAGE, INSTALLATION AND MAINTENANCE

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DEP BULLETIN 34

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SOIL EROSION AND SEDIMENT CONTROL

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REFER TO: 2024 CONNECTICUT GUIDELINES FOR

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MULCH FOR SEED

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PERMANENT SEEDING

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TOP SOILING

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3" STONE RIP RAP

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(MS)

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(PS)

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(TO)

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(RR)

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SOIL EROSION AND SEDIMENT CONTROL MEASURES

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(ECB)

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EROSION CONTROL BLANKET (SEE DETAIL)

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(CE)

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CONSTRUCTION ENTRANCE (SEE DETAIL ON SHEET C3)

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NOT VALID WITHOUT ORIGINAL SEAL

EROSION CONTROL BLANKET

C3 OF 3

AutoCAD SHX Text Surveyors

AutoCAD SHX Text Hrica Associates LLC

AutoCAD SHX Text 860-567-0491 (facsimile)

AutoCAD SHX Text 860-567-2112 (business)

AutoCAD SHX Text hricaassociates@optonline.net

AutoCAD SHX Text

SHEET #:

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SCALE:

AutoCAD SHX Text N/A

AutoCAD SHX Text 11-0365

AutoCAD SHX Text 110365

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PROJECT #:

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DRAWING:

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CHECKED BY:

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DRAWN BY:

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KSH

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TJS

AutoCAD SHX Text Kenneth S. Hrica, PE,RLS

AutoCAD SHX Text Engineers

AutoCAD SHX Text Litchfield, Connecticut 06759

AutoCAD SHX Text

DATE:

AutoCAD SHX Text 44 Maple View Trail

AutoCAD SHX Text P.O. Box 1861

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MAP #:

AutoCAD SHX Text e-mail:

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CONTROL NARRATIVE

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INCHES

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EROSION & SEDIMENT

AutoCAD SHX Text 09/08/2026

AutoCAD SHX Text REFER TO 2024 CONNECTICUT GUIDELINES FOR SOIL EROSION AND SEDIMENT CONTROL FOR ADDITIONAL INFORMATION ON THE SEDIMENT AND EROSION CONTROL MEASURES SHOWN

AutoCAD SHX Text SPECIFICATIONS MATERIALS MULCH FOR SEED, INCLUDING TACKIFIERS AND NETTINGS USED TO ANCHOR MUCH, SHALL BE: BIODEGRADABLE OR PHOTO-DEGRADABLE WITHIN 2 YEARS BUT WITHOUT SUBSTANTIAL DEGRADATION OVER A PERIOD OF 6 WEEKS, FREE OF CONTAMINANTS THAT POLLUTE THE AIR OR WATERS OF THE STATE WHEN PROPERLY APPLIED, FREE OF FOREIGN MATERIAL, COARSE STEMS AND ANY SUBSTANCE TOXIC TO PLANT GROWTH OR WHICH INTERFERES WITH SEED GERMINATION, AND CAPABLE OF BEING APPLIED EVENLY SUCH THAT IT PROVIDES 80%-95% SOIL COVERAGE AND STILL ADHERES TO THE SOIL SURFACE, DOES NOT SLIP ON SLOPES WHEN IT RAINS OR IS WATERED, DOES NOT BLOW OFF SITE, DISSIPATES RAINDROP SPLASH, HOLDS SOIL MOISTURE, MODERATES SOIL TEMPERATURES AND DOES NOT INTERFERE WITH SEED GROWTH. TYPES OF MULCHES WITHIN THIS SPECIFICATION INCLUDE, BUT ARE NOT LIMITED TO. STRAW: CUT AND DRIED STEMS OF HERBACEOUS PLANTS, SUCH AS WHEAT BARLEY, CEREAL RYE, OR BROOM. THE AVERAGE STEM LENGTH SHOULD NOT BE LESS THAN 4 INCHES. STRAW THAT CAN BE WINDBLOWN SHOULD BE ANCHORED TO HOLD IT IN PLACE. CELLULOSE FIBER: FIBER ORIGIN IS EITHER VIRGIN WOOD, POST-INDUSTRIAL/PRE-CONSUMER WOOD OR POST CONSUMER WOOD COMPLYING WITH MATERIALS SPECIFICATION (COLLECTIVELY REFERRED TO AS "WOOD FIBER"), NEWSPAPER, KRAFT PAPER, CARDBOARD (COLLECTIVELY REFERRED TO AS "PAPER FIBER") OR A COMBINATION OF WOOD AND PAPER FIBER. PAPER FIBER, IN PARTICULAR, SHALL NOT CONTAIN BORON, WHICH INHIBITS SEED GERMINATION. TACKIFIERS WITHIN THIS SPECIFICATION INCLUDE, BUT ARE NOT LIMITED TO: WATER SOLUBLE MATERIALS THAT CAUSE MULCH PARTICLES TO ADHERE TO ONE ANOTHER. EMULSIFIED ASPHALT IS SPECIFICALLY PROHIBITED FOR USE AS TACKIFIERS DUE TO ITS POTENTIAL FOR CAUSING WATER POLLUTION FOLLOWING ITS APPLICATION. NETTINGS WITH THIS SPECIFICATION INCLUDE, BUT ARE NOT LIMITED TO: PREFABRICATED OPENWORK FABRICS MADE OF CELLULOSE CORDS, ROPES, THREADS, OR BIODEGRADABLE SYNTHETIC MATERIAL THAT IS WOVEN, KNOTTED OR MOLDED IN SUCH A MANNER THAT IT HOLDS MULCH IN PLACE UNTIL VEGETATION GROWTH IS SUFFICIENT TO STABILIZE THE SOIL. GENERALLY USED IN AREAS WHERE NO MOWING IS PLANNED. EXAMPLES OF NETTING ARE TOBACCO NETTING (USED WHERE FLOWS ARE NOT CONCENTRATED) AND JUTE NETTING (TYPICALLY USED IN DRAINAGE WAYS). WHERE MULCH ANCHORING IS REQUIRED A TEMPORARY EROSION CONTROL BLANKET MAY BE USED. APPLICATION TIMING: APPLIED IMMEDIATELY FOLLOWING SEEDING. SOME CELLULOSE FIBER MAY BE APPLIED WITH SEED TO ASSIST IN MARKING WHERE SEED HAS BEEN SPRAYED, BUT EXPECT TO APPLY A SECOND APPLICATION OF CELLULOSE FIBER TO MEET THE REQUIREMENTS OF MULCH FOR SEED. SPREADING: MULCH MATERIAL SHALL BE SPREAD UNIFORMLY BY HAND OR MACHINE RESULTING IN 80%-95% COVERAGE OF THE DISTURBED SOIL WHEN SEEDING WITHIN THE RECOMMENDED SEEDING DATES. APPLICATIONS THAT ARE UNEVEN CAN RESULT IN EXCESSIVE MULCH SMOTHERING THE GERMINATING SEEDS. FOR HAY OR STRAW ANTICIPATE AN APPLICATION RATE OF 2 TONS PER ACRE. FOR CELLULOSE FIBER FOLLOW MANUFACTURER'S RECOMMENDED APPLICATION RATES TO PROVIDE 80%-95% COVERAGE. WHEN SEEDING OUTSIDE THE RECOMMENDED SEEDING DATES, INCREASE MULCH APPLICATION RATE TO PROVIDE BETWEEN 95%-100% COVERAGE OF THE DISTURBED SOIL. FOR HAY OR STRAW ANTICIPATE AN APPLICATION RATE OF 2.5 TO 3 TONS PER ACRE. WHEN SPREADING HAY MULCH BY HAND, DIVIDE THE AREA TO BE MULCHED INTO APPROXIMATELY 1,000 SQUARE FEET AND PLACE 1.5-2 BALES OF HAY IN EACH SECTION TO FACILITATE UNIFORM DISTRIBUTION. FOR CELLULOSE FIBER MULCH, EXPECT SEVERAL SPRAY PASSES TO ATTAIN ADEQUATE COVERAGE, TO ELIMINATE SHADOWING, AND TO AVOID SLIPPAGE (SIMILAR TO SPRAYING WITH PAINT). ANCHORING: WHEN NEEDED, MULCH ANCHORING IS APPLIED EITHER WITH THE MULCH AS WITH CELLULOSE FIBER OR APPLIED IMMEDIATELY FOLLOWING MULCH APPLICATION. EXCEPT THE NEED FOR MULCH ANCHORING ALONG THE SHOULDERS OF ACTIVELY TRAVELED ROADS, HILL TOPS AND LONG OPEN SLOPES NOT PROTECTED BY WIND BREAKS. WHEN USING NETTING, THE MOST CRITICAL ASPECT IS TO ENSURE THAT THE NETTING MAINTAINS SUBSTANTIAL CONTACT WITH THE UNDERLYING MULCH AND THE MULCH, IN TURN, MAINTAINS CONTINUOUS CONTACT WITH THE SOIL SURFACE. MAINTENANCE INSPECT MULCHED AREAS AT LEAST ONCE A WEEK AND WITHIN 24 HOURS OF THE END OF A STORM WITH A RAINFALL AMOUNT OF 0.5 INCH OR GREATER UNTIL THE GRASS HAS GERMINATED TO DETERMINE MAINTENANCE NEEDS WHERE MULCH HAS BEEN MOVED OR WHERE SOIL EROSION HAS OCCURRED, DETERMINE THE CAUSE OF THE FAILURE. IF IT WAS THE RESULT OF WIND, THEN REPAIR EROSION DAMAGE (IF ANY), RE-APPLY MULCH (AND SEED AS NEEDED) AND CONSIDER APPLYING A NETTING OR TACKIFIERS. IF MULCH FAILURE WAS CAUSED BY CONCENTRATING WATER, INSTALL ADDITIONAL MEASURES TO CONTROL WATER AND SEDIMENT MOVEMENT, REPAIR EROSION DAMAGE, RE-APPLY MULCH AND CONSIDER APPLYING A NETTING OR TACKIFIERS OR USE THE TEMPORARY EROSION CONTROL BLANKET MEASURE. ONCE GRASS HAS GERMINATED, INSPECTIONS SHOULD CONTINUE AS REQUIRED BY TEMPORARY SEEDING AND PERMANENT SEEDING.

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FROM THE DESIGN PROCEDURE. A WELL-GRADED MIXTURE AS USED

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HEREIN IS DEFINED AS A MIXTURE COMPOSED PRIMARILY OF THE

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LARGER STONE SIZES BUT WITH A SUFFICIENT MIXTURE OF OTHER

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SIZES TO FILL THE PROGRESSIVELY SMALLER VOIDS BETWEEN THE

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STONES. THE DIAMETER OF THE LARGEST STONE SIZE IN SUCH A

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MIXTURE SHALL BE 1.5 TIMES THE D-50 SIZE.

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THE MAXIMUM STONE DIAMETER BUT NOT LESS THAN 12 INCHES.

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WEATHERING. THE ROCK FRAGMENTS SHALL BE ANGULAR IN SHAPE.

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SHALL BE OF SUCH QUALITY THAT IT WILL NOT DISINTEGRATE ON

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EQUAL TO THE MAXIMUM DEPTH OF FLOW OR TO A POINT WHERE

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VEGETATION CAN BE ESTABLISHED TO ADEQUATELY PROTECT THE

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THE GRADIENT OF THE SLOPE BEING STABILIZED.

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A FILTER BLANKET IS A LAYER OF MATERIAL PLACED BETWEEN THE

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RIPRAP AND THE UNDERLYING SOIL SURFACE TO PREVENT SOIL

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ALWAYS BE PROVIDED WHERE SEEPAGE FROM UNDERGROUND SOURCES

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SHALL BE COMPACTED TO A DENSITY APPROXIMATING THAT OF THE

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OTHER OBJECTIONABLE MATERIAL SHALL BE REMOVED.

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AFTER SLOPE PREPARATION. FOR GRANULAR FILTERS THE STONE

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WHERE MORE THAN ONE LAYER OF FILTER MATERIAL IS USED, THE

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LAYER OF GRAVEL SHALL BE USED TO PREVENT DAMAGE TO THE

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MATERIAL, PROTECTION FROM ULTRAVIOLET RAYS AND TO PROVIDE

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OF THE FILTER. THE RIPRAP SHOULD BE PLACED TO ITS FULL SO THAT IT

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DUMPING OF SUCCESSIVE LOADS DURING FINAL PLACING, OR BY A

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PLUS OR MINUS 1/4 OF THE SPECIFIED THICKNESS.

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ONCE A RIPRAP INSTALLATION HAS BEEN COMPLETED, IT SHOULD

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THE MINIMUM THICKNESS OF THE RIPRAP LAYER SHALL BE 1.5 TIMES

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INDIVIDUAL ROCK FRAGMENTS SHALL BE DENSE, SOUND AND FREE FROM

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CRACKS, SEAMS AND OTHER DEFECTS CONDUCIVE TO ACCELERATED

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THE LEAST DIMENSION OF A INDIVIDUAL ROCK FRAGMENT SHALL BE NOT

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LESS THAN ONE-THIRD THE GREATEST DIMENSION OF FRAGMENT. THE STONE

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EXPOSURE TO WATER OR WEATHERING, BE CHEMICALLY STABLE,

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RIPRAP SHALL EXTEND UP THE BANKS OF THE CHANNEL TO A HEIGHT

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THE RIPRAP SIZE TO BE USED IN A CHANNEL BEND SHALL EXTEND

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UPSTREAM FROM THE POINT OF CURVATURE AND DOWNSTREAM FROM THE

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POINT OF TANGENCY A DISTANCE OF AT LEAST 5 TIMES THE CHANNEL

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BOTTOM WIDTH. THE RIPRAP SHALL EXTEND ACROSS THE BOTTOM AND

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WHERE RIPRAP IS USED ONLY FOR BANK PROTECTION AND DOES NOT

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EXTEND ACROSS THE BOTTOM OF THE CHANNEL, RIPRAP SHALL BE KEYED

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INTO THE BOTTOM OF THE CHANNEL TO A MINIMUM DEPTH EQUAL TO 1.5

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TIMES MAXIMUM SIZE STONE AND SHALL EXTEND ACROSS THE BOTTOM OF

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RIPRAP FOR SLOPE STABILIZATION SHALL BE DESIGNED SO THAT THE

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NATURAL ANGLE OF REPOSE OF THE STONE MIXTURE IS GREATER THAN

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A FILTER BLANKET CAN BE EITHER A GRANULAR STONE LAYER OR A

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GEOTEXTILE FILTER FABRIC. FILTER BLANKETS OR BEDDING SHOULD

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THEATENS THE STABILITY OF THE RIPRAP.

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THE SUBGRADE FOR THE RIPRAP OR FILTER SHALL BE PREPARED TO THE

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REQUIRED LINES AND GRADES. ANY FILL REQUIRED IN THE SUBGRADE

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SURROUNDING UNDISTURBED MATERIAL. BRUSH, TREES, STUMPS AND

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PLACEMENT OF THE FILTER BLANKET SHOULD BE DONE IMMEDIATELY

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SHOULD BE SPREAD IN A UNIFORM LAYER TO THE SPECIFIED DEPTH.

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LAYERS SHOULD BE SPREAD SO THAT THERE IS MINIMAL MIXING OF THE

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FOR FABRIC FILTERS, THE MATERIAL SHOULD BE PLACED DIRECTLY ON

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THE PREPARED SLOPE. THE EDGES OF THE SHEETS SHOULD OVERLAP BY

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AT LEAST 12 INCHES. EITHER ANCHOR PINS OR WIRE STAPLES CAN BE

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USED. ANCHOR PINS, 15 INCHES LONG, SHOULD BE SPACED EVERY 3

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FEET ALONG THE OVERLAP. ELEVEN GAUGE WIRE STAPLES, 6 TO 10

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INCHES LONG WITH A 2 TO 6 INCH SPREAD CAN ALSO BE USED AT 3

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FOOT SPACING. THE UPPER END OF THE FABRIC SHOULD BE BURIED A

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MINIMUM OF 12 INCHES DEEP. THE LOWER END SHOULD BE TOED IN.

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CARE SHOULD BE TAKEN NOT TO DAMAGE THE FABRIC WHEN PLACING THE

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RIPRAP. IF DAMAGE OCCURS, THAT SHEET SHOULD BE REMOVED AND

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REPLACED. FOR LARGE STONE, 12 INCHES OR GREATER, A 4-INCH

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PLACEMENT OF RIPRAP SHOULD FOLLOW IMMEDIATELY AFTER PLACEMENT

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COURSE THICKNESSPRODUCES A DENSE WELL-GRADED MASS OF STONE WITH

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A MINIMUM OF VOIDS.THE DESIRED DISTRIBUTION OF STONES THROUGHOUT THE

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MASS MAY BE OBTAINED BY SELECTIVE LOADING AT THE QUARRY, CONTROLLED

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COMBINATION OF THESE METHODS. THE RIPRAP SHOULD NOT BE

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PLACED BY DUMPING INTO CHUTES OR SIMILAR METHODS WHICH ARE

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LIKELY TO CAUSE SEGREGATION OF THE VARIOUS STONE SIZES. CARE

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SHOULD BE TAKEN NOT TO DISLODGE THE UNDERLYING MATERIAL WHEN

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THE FINISHED SLOPE SHOULD BE FREE OF POCKETS OF SMALL STONE OR

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CLUSTERS OF LARGE STONES. HAND PLACING MAY BE NECESSARY TO

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ACHIEVE THE REQUIRED GRADES AND A GOOD DISTRIBUTION OF STONE

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SIZES. FINAL THICKNESS OF THE RIPRAP BLANKET SHOULD BE WITHIN

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INSPECTED PERIODICALLY TO DETERMINE IF HIGH FLOWS HAVE CAUSED

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SCOUR BENEATH THE RIPRAP OR DISLODGED ANY OF THE STONE.

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PERIODIC REMOVAL OF LARGE TREES MAY BE REQUIRED TO INSURE

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REQUIRE VERY LITTLE MAINTENANCE. IT SHOULD, HOWEVER, BE

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- MAINTENANCE

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PLACING THE STONES.

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INTERFACIAL CONTACT.

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- STONE PLACEMENT

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INSTALLATION REQUIREMENTS

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- SUBGRADE PREPARATION

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- FILTER BLANKET

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LAYERS.

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THE CHANNEL THE SAME DISTANCE.

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- RIPRAP FOR SLOPE STABILIZATION

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MOVEMENT INTO OR THROUGH THE RIPRAP.

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- FILTER BLANKETS

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- RIPRAP FOR CHANNEL STABILIZATION

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UP BOTH SIDES OF THE CHANNEL.

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AND SHALL BE SUITABLE IN ALL OTHER RESPECTS FOR THE PURPOSE

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CHANNEL.

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- THICKNESS

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- QUALITY OF STONE

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(RR) RIP RAP

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STANDARD RIPRAP: THIS MATERIAL SHALL CONFORM TO THE CONN DOT

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SPECIFICATIONS FOR RIPRAP AND THE FOLLOWING REQUIREMENTS:

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SPALLS AND STONES LESS THAN 6 INCHES IN SIZE.

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STONE SIZE PERCENT OF THE MASS

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18" OR OVER 0

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10" TO 18" 30-50

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6" TO 10" 30-50

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4" TO 6" 20-30

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2" TO 4" 10-20

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LESS THAN 2" 0-10

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MODIFIED RIPRAP: THIS MATERIAL SHALL CONFORM TO THE FOLLOWING

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STONE SIZE PERCENT OF THE MASS

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10" OR OVER 0

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6" TO 10" 20-50

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2" TO 4" 30-40

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1" TO 2" 10-20

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LESS THAN 1" 0-10

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4" TO 6" 30-60

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NOT MORE THAN 15 PERCENT OF THE RIPRAP SHALL BE SCATTERED

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NO STONE SHALL BE LARGER THAN 30 INCHES IN SIZE, AND AT LEAST

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75 PERCENT OF THE MASS SHALL BE STONES AT LEAST 15 INCHES IN

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INTERMEDIATE RIPRAP: THIS MATERIAL SHALL CONFORM TO THE FOLLOWING

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THE RIPRAP SHALL BE COMPOSED OF A WELL-GRADED MIXTURE DOWN TO

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THE ONE-INCH SIZE PARTICLE SUCH THAT 50 PERCENT OF THE MIXTURE

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BY WEIGHT SHALL BE LARGER THAN THE D-50 SIZE AS DETERMINED

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GRADATION:

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DESIGN CRITERIA

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- GRADATION

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SIZE.

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GRADATION:

AutoCAD SHX Text d50 = 1.25 FEET or 15 INCHES

AutoCAD SHX Text d50 = 0.67 FEET or 8 INCHES

AutoCAD SHX Text d50 = 0.42 FEET or 5 INCHES

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INTENDED. THE BULK SPECIFIC GRAVITY (SATURATED SURFACE-DRY BASIS)

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OF THE INDIVIDUAL STONES SHALL BE AT LEAST 2.65.

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NOTE: D.O.T. STANDARD SPECIFICATIONS DO NOT ACCEPT

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ROUNDED STONE OR BROKEN CONCRETE FOR RIPRAP.

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AND REPLACE THE DAMAGED SHEET. FOR LARGE STONE, 12 INCHES OR

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TAKE CARE NOT TO DAMAGE THE FABRIC. IF DAMAGED OCCURS, REMOVE

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PLACING THE STONES. WHEN PLACING RIPRAP ON A GEOTEXTILE

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TAKE CARE NOT TO DISLODGE THE UNDERLYING MATERIAL WHEN

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GREATER, USE A 6 INCH LAYER OF FILTER OR BEDDING MATERIAL

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TO PREVENT DAMAGE TO THE MATERIAL OF THE PUNCTURE.

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THE INTEGRITY OF THE RIPRAP PROTECTION. REPAIR IMMEDIATELY

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UPON OBSERVED FAILURE.

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THE SIDE SLOPES OF ALL STOCKPILES SHALL NOT EXCEED 2 TO 1

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A SEDIMENT BARRIER OF GEOSYNTHETIC SILT FENCE SHALL SURROUND

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TEMPORARY SEEDING OF STOCKPILES SHALL BE COMPLETED WITHIN 30

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BEFORE TOPSOILING, ESTABLISH NEEDED EROSION AND SEDIMENT

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CONTROL MEASURES SUCH AS DIVERSIONS, GRADE STABILIZATION

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STRUCTURES, WATERWAYS, SILT FENCE AND SEDIMENT BASINS.

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PREVIOUSLY ESTABLISHED GRADES ON THE AREAS TO BE TOPSOILED

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SHALL BE MAINTAINED ACCORDING TO THE APPROVED PLAN.

AutoCAD SHX Text WHERE THE pH OF THE SUBSOIL IS 6.0 OR LESS, GROUND

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AGRICULTURAL LIMESTONE SHALL BE SPREAD IN ACCORDANCE WITH THE

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SOIL TEST OR THE VEGETATIVE ESTABLISHMENT PRACTICE BEING USED.

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AFTER THE AREA TO BE TOPSOILED HAVE BEEN BROUGHT TO GRADE, AND

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IMMEDIATELY PRIOR TO SPREADING THE TOPSOIL, THE SUBGRADE SHALL

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BE LOOSENED BY DISCING SCARIFYING OR TRACKING TO A DEPTH OF

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AT LEAST 4 INCHES TO ENSURE BONDING OF THE TOPSOIL AND SUBSOIL.

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TOPSOIL SHALL NOT BE PLACED WHILE IN A FROZEN OR MUDDY

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CONDITION, WHEN THE SUBGRADE IS EXCESSIVELY WET, OR IN A

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CONDITION THAT MAY OTHERWISE BE DETRIMENTAL TO PROPER GRADING

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OR PROPOSED SODDING OR SEEDING. THE TOPSOIL SHALL BE

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UNIFORMLY DISTRIBUTED TO A MINIMUM COMPACTED DEPTH OF 4

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INCHES. ANY IRREGULARITIES IN THE SURFACE RESULTING FROM

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TOPSOILING OR OTHER OPERATIONS SHALL BE CORRECTED IN ORDER TO

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PREVENT THE FORMATION OF DEPRESSIONS OR WATER POCKETS.

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IT IS NECESSARY TO COMPACT THE TOPSOIL ENOUGH TO ENSURE GOOD

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CONTACT WITH THE UNDERLYING SOIL AND TO OBTAIN A UNIFORM FIRM

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SEEDBED FOR THE ESTABLISHMENT OF A HIGH MAINTENANCE TURF.

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HOWEVER, UNDUE COMPACTION IS TO BE AVOIDED AS IT INCREASES

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RUNOFF VELOCITY AND VOLUME, AND PREVENTS SEED GERMINATION.

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PERMANENT SEEDINGS OR SOD WILL NOT BE ESTABLISHED IN TOPSOIL

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THAT HAS BEEN TREATED WITH HERBICIDES WHICH WOULD INHIBIT

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GRASS GROWTH. TOPSOIL SO TREATED WILL BE STOCKPILED FOR ONE

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YEAR TO ALLOW BREAKDOWN OF HERBICIDE RESIDUES OR TOPSOIL WILL

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BE COVERED WITH 6 INCHES OF UNTREATED TOPSOIL TO SERVE AS A

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DAYS OF THE FORMATION OF THE STOCKPILE, IN ACCORDANCE WITH THE

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- TOPSOIL AND HERBICIDES

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SEEDBED.

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- SIDE SLOPES

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- SEDIMENT BARRIER

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- TEMPORARY SEEDING

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- SITE PREPARATION

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- GRADING

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- LIMING

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- BONDING

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- APPLYING TOPSOIL

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THESE MEASURES MUST BE MAINTAINED DURING TOPSOILING.

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TEMPORARY VEGETATIVE COVER MEASURE.

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SHALL RESULT.

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(TO) TOPSOILING

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SITE INVESTIGATIONS SHALL BE MADE TO DETERMINE IF THERE IS

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SUFFICIENT TOPSOIL OF GOOD QUALITY TO JUSTIFY STRIPPING. HIGH

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QUALITY TOPSOIL SHALL BE FRIABLE AND LOAMY (LOAM, SANDY LOAM,

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SILT LOAM, SANDY CLAY LOAM, CLAY LOAM). OTHER SOIL TYPES WITH

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HIGH ORGANIC CONTENT MAY BE FOUND SUITABLE AFTER TESTING. IT

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SHALL BE FREE OF DEBRIS, TRASH, STUMPS, ROCKS, ROOTS, AND

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NOXIOUS WEEDS. IT SHALL GIVE EVIDENCE OF BEING ABLE TO

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SUPPORT HEALTHY VEGETATION. IT SHALL CONTAIN NO SUBSTANCE

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THAT IS POTENTIALLY TOXIC TO PLANT GROWTH.

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ALL TOPSOIL SHALL BE TESTED BY A RECOGNIZED LABORATORY FOR THE

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FOLLOWING AND SHALL MEET THE REQUIREMENTS GIVEN:

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CONTAINING NOT LESS THAN 6% AND NOT MORE THAN 20% ORGANIC

AutoCAD SHX Text pH RANGE SHALL BE 6.0-7.5. IF pH IS LESS THAN 6.0, LIME

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SHALL BE ADDED IN ACCORDANCE WITH THE

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RECOMMENDATIONS OF THE VEGETATIVE ESTABLISHMENT

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SOLUBLE SALTS SHALL NOT EXCEED 500 PPM.

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IF ADDITIONAL OFF-SITE TOPSOIL IS NEEDED, IT MUST MEET THE

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STRIPPING SHALL BE CONFINED TO THE IMMEDIATE CONSTRUCTION

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AREA. A 4 TO 6 INCH STRIPPING DEPTH IS COMMON, BUT DEPTH MAY

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VARY DEPENDING ON THE PARTICULAR SOIL. ALL PERIMETER DIKES,

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BASINS, AND OTHER SEDIMENT CONTROLS SHALL BE IN PLACE PRIOR TO

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-TOPSOIL SHALL BE STOCKPILED IN SUCH A MANNER THAT NATURAL

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DRAINAGE IS NOT OBSTRUCTED AND NO OFF-SITE SEDIMENT DAMAGE

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- STRIPPING

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- STOCKPILING

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PRACTICE BEING USED.

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STANDARDS STATED ABOVE.

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STRIPPING.

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MATTER AS DETERMINED BY LOSS-ON-IGNITION OF OVEN DRIED

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- MATERIALS

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SAMPLES DRIED AT 105 DEGREES CENTIGRADE.

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-TOPSOIL STOCKPILES NEED TO BE LOCATED AWAY FROM ALL

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CONSTRUCTION ACTIVITIES.

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ALL TOPSOIL STOCKPILES.

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(GSF) GEOSYNTHETIC SILT FENCE

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SEDIMENT BARRIERS

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SPECIFICATIONS

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GEOTEXTILE SILT FENCING MINIMUM REQUIREMENTS

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PHYSICAL PROPERTY TEST METHOD MINIMUM

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REQUIREMENT

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FILTERING EFFICIENCY ASTM 5141 75

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% (MIN)

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GRAB TENSILE STRENGTH (LBS.) ASTM D4632 100 LBS.

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ELONGATION @ FAILURE ASTM D4632 15

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MULLEN BURST STRENGTH ASTM D3786 250 PSI

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PUNCTURE STRENGTH ASTM 4833 50 LBS.

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APPARENT OPENING SIZE ASTM D4751 NO LESS THAN 0.90MM

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AND NO GREATER THAN

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0.60 MM

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FLOW RATE ASTM D4491 0.2 GAL/FT2/MIN

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PERMATIVITY ASTM D4491 0.05 SEC. -1 (MIN)

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ULTRAVIOLET RADIATION

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STABILITY

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% ASTM-D4355 70

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% AFTER 500 HOURS

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OF EXPOSURE (MIN)

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GEOTEXTILE SILT FENCE SLOPE/ LENGTH LIMITATIONS

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SLOPE STEEPNESS 1 SLOPE LENGTH AND WING SPACING

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5:1 OR FLATTER 100 FEET

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3:1 TO 5:1 75 FEET

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2:1 TO 3:1 50 FEET

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MATERIALS

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GEOTEXTILE FABRIC: SHALL BE A PERVIOUS SHEET OF POLYPROPYLENE, NYLON,

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POLYESTER, ETHYLENE OR SIMILAR FILAMENTS AND SHALL BE CERTIFIED BY THE

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MANUFACTURER OR SUPPLIER AS CONFORMING TO THE REQUIREMENTS SHOWN. THE

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GEOTEXTILE SHALL BE NON-ROTTING, ACID AND ALKALI RESISTANT AND HAVE

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SUFFICIENT STRENGTH AND PERMEABILITY FOR THE PURPOSE INTENDED, INCLUDING

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HANDLING AND BACKFILLING OPERATIONS. FILAMENTS IN THE GEOTEXTILE SHALL BE

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RESISTANT TO ABSORPTION. THE FILAMENT NETWORK MUST BE DIMENSIONALLY

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STABLE AND RESISTANT TO DE-LAMINATION. THE GEOTEXTILE SHALL BE FREE OF

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ANY CHEMICAL TREATMENT OR COATING THAT WILL REDUCE ITS PERMEABILITY. THE

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GEOTEXTILE SHALL ALSO BE FREE OF ANY FLAWS OR DEFECTS WHICH WILL ALTER ITS

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PHYSICAL PROPERTIES. TORN OR PUNCTURED GEOTEXTILES SHALL NOT BE USED.

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SUPPORTING POSTS: SHALL BE AT LEAST 42 INCHES LONG MADE OF EITHER 1.5

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INCH SQUARE HARDWOOD STAKES OR STEEL POSTS WITH PROJECTIONS FOR

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FASTENING THE GEOTEXTILE POSSESSING A MINIMUM STRENGTH OF 0.5 POUND PER

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LINEAR FOOT.

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PLACEMENT ON THE LANDSCAPE

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LOCATE 5-10 FEET DOWN GRADIENT FROM THE TOE OF THE

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SLOPE, GENERALLY ON THE CONTOUR WITH MAINTENANCE AND SEDIMENT REMOVAL

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REQUIREMENTS IN MIND. WHEN THE CONTOUR CANNOT BE FOLLOWED INSTALL THE

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FENCE SUCH THAT PERPENDICULAR WINGS ARE CREATED TO BREAK THE VELOCITY OF

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WATER FLOWING ALONG THE FENCE.

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SWALES: LOCATE "U" SHAPE ACROSS SWALE SUCH THAT THE BOTTOM OF BOTH

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ENDS OF THE FENCE ARE HIGHER THAN THE TOP OF THE LOWEST SECTION OF THE

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FENCE.

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CATCH BASINS IN SWALE ON SLOPES: LOCATE 2 "U" SHAPES ACROSS SWALE

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AS ABOVE: ONE IMMEDIATELY UP SLOPE FROM THE CATCH BASIN AND THE OTHER

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IMMEDIATELY DOWN SLOPE FROM THE CATCH BASIN.

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CATCH BASINS IN DEPRESSIONS: ENCIRCLE ENTIRE CATCH BASIN.

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CULVERT INLETS: LOCATE IN "U" SHAPES APPROXIMATELY 6 FEET FROM THE

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File details come from the government source that posted it. Updated Sep 11, 2026.