7 of 7 Salem Stormwater Drawings_Addendum A.pdf

NTS

NTS

NTS

NTS

SEE FILTER SOCK DETAIL FOR

SEDIMENT CONTROL

STAKE

STAKE

SEE DETAIL C4 FOR

FILTER SOCK FOR

SEDIMENT CONTROL

SEE DETAIL C4 FOR

FILTER SOCK FOR

SEDIMENT CONTROL

SOIL/SEDIMENT

STOCKPILE AREA

SOIL/SEDIMENT

STOCKPILE AREA

NTS

SURFACE POND OUTLET

CONTROL STRUCTURE. SEE

SHEET CK501, DETAILS E8 & F1

4'-0"MIN.

2'-0"Ø

1"

1" 1-1

4"

2'-1 78"

7/8"

4"

AA

PLAN

SECTION A-A

FINISH

1"

2' - 2 34" 4"

4"

34-3/4"

4" 5 8"

2'-10 58"

FRAME & COVER

NOTE:

ALL CASTINGS SHALL

BE MANUFACTURED

FROM GRAY IRON

CONFORMING TO ASTM

A48 CLASS 35B

FRAME AND COVER

PRECAST REINFORCED CONCRETE

MANHOLE TO CONFORM TO ASTM

C - 478 CONCRETE OF 4000 PSI AT

28 DAYS

EXISTING GRADE

CONCRETE COLLAR

APPROVED GRADE RING

PIPE INVERT

MULTIPLES OF

2', 3', OR 4'

6" SCREENED GRAVEL

#4 @ 18"

EW MID-DEPTH

6" MIN.

6" (TYP.)

6" (TYP.)

Ø2'-2 34"

Ø2'- 0 18"

Ø2'-1 78"

FINISH

2'-0 18"

NTS

≤5' OF DEPTH

≥5' OF DEPTH

CONNECTING PIPE

TOPSOIL

GRASS

SUBGRADE

NOTES:

1. LIGHTLY ROLL OR COMPACT TOPSOIL TO 4" MINIMUM

2. COMPACT SUBGRADE TO A MIN. OF 85% PER ASTM D698

3. SEEDING

NTS

NTS

2" X 2" WOODEN STAKES PLACED 10.0' O.C.

FILTER SOCK (8", 9" OR 12")

WORK AREA PROTECTION AREA

SECTION - NATURAL GROUND AREAS

WORK AREA

FILTER SOCK (8", 12" OR 18")

CONCRETE BLOCK OR SANDBAG PLACED 10.0' O.C.

PAVEMENT SURFACE

PROTECTION AREA

SECTION - PAVEMENT AREAS

NOTES::

1. SOCK SIZE TO BE PER MANUFACTURER'S RECOMMENDATION FOR THE APPLICATION.

2. FILTER MATERIAL TO BE PER MANUFACTURER'S RECOMMENDATION FOR THE

APPLICATION.

3. COMPOST MATERIAL TO BE DISPERSED ON SITE, AS DETERMINED BY THE VA COR AFTER

SITE IS PERMANENTLY STABILIZED.

WORK AREA

WORK AREA

PROTECTION AREA

PROTECTION AREA

FILTER SOCK (8", 9" OR 12")

FILTER SOCK (8", 12" OR 18")

CONCRETE BLOCK OR SANDBANG PLACED 10.0' O.C. (TYP.)

2" X 2" WOODEN STAKES PLACED 10.0' O.C. (TYP.)

WATER FLO

W

FLO

W

PLAN - PAVEMENT AREASPLAN - NATURAL GROUND AREA

NTS

NOTE: SOIL STOCKPILE SHALL BE COVERED WITH A SECURED TARPAULIN WHEN NOT IN USE.

OVERFLOW

ELEVATION

FILTER

MATERIAL

`T

SECTION

THICKNESS (`T') = 2.25 x D50 RIPRAP SIZING - 6" (150mm) MIN.

`D

4.0 x

`D

MI

N.

PLAN

La = 4.5 x `D' MIN.

`D'=PIPE DIAMETER

0.5 X `D'

PIPE OUTLET PROTECTION SIZING TABLE

PIPE SIZE (IN) RIP RAP SIZING (D50) LENGTH(FT) WIDTH(FT)

6 3 2.5 2.0 12 5 5.0 4.0 15 6 6.25 5.0 18 8 7.5 6.0 24 10 10.0 8.0 30 12 13.0 10.0 36 14 15.0 12.0

NOTES:

1. 'La' = LENGTH OF APRON. DISTANCE 'La' SHALL BE OF SUFFICIENT

LENGTH TO DISSIPATE ENERGY.

2. APRON SHALL BE SET AT A ZERO GRADE AND ALIGNED STRAIGHT.

3. FILTER MATERIAL SHALL BE FILTER OR 6" (150mm) THICK MINIMUM

GRADED GRAVEL LAYER.

ROCK d50

50% SHALL BE LARGER

THAN 6" (150mm) MIN. DIA.

RECEIVING

ELEVATION

PIPE FLEXIBLE ADAPTOR COUPLING

NEW PIPE (MATERIAL VARIES)

S.S. TIE BAND

EXISTING PIPE (MATERIAL VARIES)

NOTES:

1. REMOVE WATERPROOFING FROM STRUCTURE BEFORE

APPLYING MORTAR. WATERPROOF AGAIN AFTER MORTAR HAS

SET.

2. EXISTING MANHOLE OR CATCH BASIN SHALL BE CORE-DRILLED

FOR PIPE INSTALLATION. IF PIPE DIAMETER IS SO LARGE THAT

CORE DRILLING IS PROHIBITED, THE CONTRACTOR MAY

SAW-CUT THE STRUCTURE TO CREATE PIPE OPENING. THE NEW

OPENING MUST THEN BE SEALED AND WATERTIGHT BOTH INSIDE

AND OUTSIDE THE STRUCTURE.

3. PIPES THAT REQUIRE A COUPLING CAN BE OF DIFFERENT SIZES

OR SIMILAR SIZES.

OUTLET CONTROL

STRUCTURE (OCS) GRATE ELEVATION

OCS-1

OCS-2

OCS-3

OCS-5

OCS-6

OCS-7

1097.0

1104.5

1104.5

1077.5 1070.5

1074.5

NEW PIPE TO EXISTING STRUCTURE STUB WITH DIFFERENT PIPE SIZING

NEW PIPE (MATERIAL VARIES)

PIPE FLEXIBLE ADAPTOR COUPLING

EXISTING PIPE STUB (MATERIAL VARIES)

S.S. TIE BAND

NEW PIPE TO EXISTING STRUCTURE STUB WITH SAME PIPE SIZING

NOTE:

ADAPTOR COUPLINGS ARE MADE

FROM PARTS SUCH AS A ONE

STEPPED MOULDED EPDM RUBBER

BODY WITH TWO DIFFERENT

DIAMATERS ON EACH SIDE AND TWO

STAINLESS STEEL CLAMP BANDS

WHICH WHEN TIGHTENED CREATE A

SECURE CONNECTION.

NOTE:

WHEN INSTALLING, SLIDE COUPLING

OVER THE PIPES AND USE A

SCREWDRIVER OR NUT DRIVER TO

TIGHTEN THE STEEL CLAMPS. MAKE

SURE TO NOT OVERTIGHTEN.

CHECK PIPES ARE ALIGNED. CLAMPS

SHOULD BE TIGHTENED TO THE

TORQUE OF 60 INCH-LBS.

Heavy Duty, Built Up Type Frame, Cascade Grate

D

24 1/4

29 1/4

D

32 3/4

24 1/4

NOTES:

- Dimensions are approximate & in inches

- Gray Iron, Class 35B

- Conforms to ASTM A48 / A48M-03 specifications

FRAME

HEIGHT

NTS

2.0

2.0

PLAN VIEW

BARREL SECTION

CONCENTRIC

CONE OR

TRUNCATED

CONE

BASE SECTION

SECTION VIEW

NOTE:

1. CASCADE GRATES SHALL BE INSTALLED ON GRADIENT OF

GUTTER IF PROFILE GRADE EXCEEDS 5%. GRATES SHALL BE

DEPRESSED 2" BELOW NORMAL GUTTER GRADE. PARALLEL

BAR GRATES SHALL BE INSTALLED ON A LEVEL GRADIENT.

2. THE CONTRACTOR SHALL SUBMIT BUOYANCY CALCULATIONS

TO VERIFY THE STRUCTURE'S RESISTANCE TO FLOTATION. IF

ANCHORING IS NEEDED FOR RESISTANCE TO FLOTATION, THE

CONTRACTOR SHALL FURNISH AND INSTALL ANCHORING

METHODS.

12" THICK 34" CRUSHED

STONE BASE

PRECAST CONCRETE BASE

SECTION WITH PIPE

OPENINGS AS APPROVED

BY THE ENGINEER.

ALL PIPES TO HAVE A

WATERTIGHT SEAL

FLEXIBLE SLEEVE CAST IN

PRECAST STRUCTURE TO

BE INTERFACE LOCK JOINT

OR EQUAL.

JOINTS OF WATERTIGHT CATCH

BASIN MUST MEET AASHTO

M1988.

SIDEWALL OF CATCH BASIN TO

BE BACKFILLED WITH

SELECT BACKFILL, AASHTO

M145 AS REVISED, CLASS A-3

OR BETTER.

CEMENT MORTAR (TYPE

II CEMENT) BRING TO

GRADE WITH BRICK WITH

A MIN. OF 1 COURSE AND

A MAX. OF 3 COURSES.

FRAME AND GRATE - EQUAL WITH

MAXIMUM OPENING SIZE OF 2 14 "

WHERE DEPTH OF COVER IS

NOT SUFFICIENT TO USE

CONCENTRIC OR

TRUNCATED CONE. A FLAT

TOP MAY BE USED.

NOTE:

WHERE THE CATCH BASIN IS

INSTALLED ADJACENT TO

BITUMINOUS CONCRETE OF TYPE V

SLOPED CURB. SET CENTERLINE OF

CATCH BASIN FRAME 1'-6" OFF FACE

OF CURB.

EXTERIOR OF STRUCTURE

SHALL BE TREATED WITH 2

COATS OF APPROVED DAMP

PROOF MATERIAL.

DESIGN NOTES:

1. ALL CONCRETE TO HAVE A MIN. OF

4,000 PSI COMPRESSIVE STRENGTH AT

28 DAYS.

2. DESIGN LOAD FOR H-20 WHEEL

LOAD.

3. CATCH BASIN TO CONFORM TO

ASTM-C478 SPECIFICATIONS.

4. REINFORCE TO 0.12 IN SQ./LF..

2.0 MI

N

18"

8"

2"

1"

BACK

VIEW

6"

9"

1 4"

FOR 1/2" BOLT

10"

11 14"

"3

8"

2 1 2"

SIDE

VIEW

PIPE

NOTE: ASSEMBLED WITH 1/2" DIA.

BY 5" HEX HEAD BRASS BOLT &

BRASS HEX NUT.

1 78"

TOP

VIEW

14"

HINGE

HINGE

R 4'-6 12"

CEMENT CASTING OF

CATCH BASIN

WALL

PIPE

CEMENT CASTING OF

CATCH BASIN WALL

R 1"

R 5/16"

CATCH BASIN

CONNECTION OUTLET

NTS

NOTE:

CASCADE GRATES SHALL BE INSTALLED ON GRADIENT OF GUTTER

IF PROFILE GRADE EXCEEDS 5%. GRATES SHALL BE DEPRESSED 2"

BELOW NORMAL GUTTER GRADE. PARALLEL BAR GRATES SHALL BE

INSTALLED ON A LEVEL GRADIENT.

CATCH BASIN HOOD

CATCH BASIN HOOD

NOTES::

1. THE CONTRACTOR SHALL SUBMIT BUOYANCY CALCULATIONS TO VERIFY THE

STRUCTURE'S RESISTANCE TO FLOTATION. IF ANCHORING IS NEEDED FOR RESISTANCE

TO FLOTATION, THE CONTRACTOR SHALL FURNISH AND INSTALL ANCHORING METHODS.

A

A

CK501

CIVIL DETAILS

Project Number

Building Number

Drawing Number

Project Title

Location

Issue Date Checked Drawn

Drawing Title

Approved:

VA FORM 08 - 6231

A

OFFICE OF

CONSTRUCTION

AND FACILITIES

MANAGEMENT

U.S. Department of Veterans Affairs

B

C

D

E

F

A

B

C

D

E

F

21 4 5 6 7 8 9 10

PhaseArchitect/Engineer of Record StampConsultant

321 4 5 6 7 8 9 10

Sprinkler Status

Correct Storm Water Drainage

1970 Roanoke Boulevard Salem, VA 24153-6404

658-23-108

01.28.2026 RBB KRS/PEH

100% FINAL DESIGN

# Revisions Date

Scientists I Engineers I Program Managers

Mabbett & Associates, Inc.

105 Central Street Stoneham, MA 02180-1248

T. 781-275-6050 www.mabbett.com

Mabbett

C

K d w g

Page of 59

1 ADDENDUM A - REVISION PER BIDDERS' QUESTIONS 9/30/2026

2016 ROAD & BRIDGE STANDARDS

NTS

2016 ROAD & BRIDGE STANDARDS

2016 ROAD & BRIDGE STANDARDS

MANHOLE OUTER

DIA.

INLET PIPE

OUTLET PIPE

SEE

DETAIL A

INSTALLED PLAN VIEW

DETAIL A

WEIR WALL

ANCHOR

SEE GENERAL

NOTES 1 & 5

B A

S E

S

E C

T I O

N

F

T

T

H R

O U

G H

F

T

WEIR (HEIGHT PER

PLANS) CAST INTO

BASE SECTION

GENERAL NOTES

1. STEEL REINFORCEMENT CONFORMS TO LATEST ASTM SPECIFICATION: ASTM A-615, GRADE 60 BLACK DEFORMED BARS ASTM

A-185 WELDED WIRE FABRIC 0.12 Sq. In./ Linear Ft. and 0.12 Sq. In. (Both Ways) Base Bottom

2. CONCRETE: fc = 4,000 psi @ 28 DAYS MINIMUM, TYPE III CEMENT

3. BUTYL RUBBER JOINT SEALANT PROVIDED CONFORMS TO ASTM C-990

4. HS-20 DESIGN LOADING

5. ONE POUR MONOLITHIC BASE SECTION

6. THE CONTRACTOR SHALL SUBMIT BUOYANCY CALCULATIONS TO VERIFY THE STRUCTURE'S RESISTANCE TO FLOTATION. IF

ANCHORING IS NEEDED FOR RESISTANCE TO FLOTATION, THE CONTRACTOR SHALL FURNISH AND INSTALL ANCHORING METHODS.

WEIR WALL

DETAIL B

MANHOLE

WALL

WEIR

WALL

ANCHORS

EQUAL EQUAL

4' 5"

4"

NTS

APPLY

TACK

COAT

2.

3.

4.

1.01.0

NOTES:

1. PAVEMENT TO BE BITUMINOUS CONCRETE LAID IN 2 COURSES.

2. 2" BITUMINOUS CONCRETE SURFACE COURSE

3. 3" BITUMINOUS CONCRETE BINDER COURSE

4. 8" BASE COURSE

5. 12" SUBBASE COURSE

6. ALL TRENCHES SHALL BE BACKFILLED AND TEMPORARILY PAVED OR STEEL PLATED AT

THE END OF EACH WORKING DAY.

7. BACKFILL MATERIAL TO BE PLACED IN 0.67' MAX. LIFTS AT 95% MODIFIED PROCTOR

COMPACTION.

SAW-CUT EXIST PAVE.

SAW-CUT EXIST PAVE.

SAW-CUT EXISTING PAVEMENT, APPLY TACK COAT, INFRARED JOINTS

AFTER PLACING PAVEMENT

DISTANCE AS REQUIRED

APPLY TACK COAT

5.

NTS

PAVEMENT EDGE.

FULL DEPTH SEVERANCE

WITH A SAW BLADE

CONCRETE PAVEMENT

NEW PORTLAND CEMENT

EXISTING CONCRETE

SEE NOTE 2

FULL-DEPTH SEVERANCE

WITH A SAW BLADE

NOTES:

1. PAVEMENT TO BE A MINIMUM 7" OF PORTLAND CEMENT CONCRETE WITH A MINIMUM 8"

OF AGGREGATE BASE COURSE. THE THICKNESS OF THE AGGREGATE BASE COURSE MAY

NEED TO BE INCREASED IF POOR SUBGRADE AND WEATHER CONDITIONS ARE ENCOUNTERED

DURING CONSTRUCTION.

2. REMOVE 8" OF EXISTING SUBBASE AND REPLACE WITH NEW SUBBASE AND COMPACT

TO 95% OF THE MODIFIED PROCTOR TEST RESULTS.

3. CONCRETE PAVEMENT SHALL MEET THE MINIMUM REQUIREMENTS OF VDOT

SPECIFICATION 214 AND 217.

4. USE S.S. SUPPORT CHAIRS FOR REBAR.

5. PAVED CONCRETE STRENGTH SHALL BE A MINIMUM OF 3,000 PSI.

9"

TYP

9"

TYP

MIN. PATCH WIDTH 4'-0"

1-1/4" STAINLESS STEEL

BAR - 18" LONG SPACING

- 18" O.C.

#4 REBAR AT 12" O.C.

E.W. AT MIDSPAN

EXISTING

CONCRETE

NTS

PAVEMENT EDGE.

FULL DEPTH SEVERANCE

WITH A SAW BLADE

CONCRETE PAVEMENT

NEW PORTLAND CEMENT

EXISTING CONCRETE

SEE NOTE 2

FULL DEPTH SEVERANCE

WITH A SAW BLADE

NOTES:

1. PAVEMENT TO BE A MINIMUM 5" OF PORTLAND CEMENT CONCRETE WITH A MINIMUM 6"

OF AGGREGATE BASE COURSE. THE THICKNESS OF THE AGGREGATE BASE COURSE MAY

NEED TO BE INCREASED IF POOR SUBGRADE AND WEATHER CONDITIONS ARE ENCOUNTERED

DURING CONSTRUCTION.

2. REMOVE 8" OF EXISTING SUBBASE AND REPLACE WITH NEW SUBBASE AND COMPACT

TO 95% OF THE MODIFIED PROCTOR TEST RESULTS.

3. CONCRETE PAVEMENT SHALL MEET THE MINIMUM REQUIREMENTS OF VDOT

SPECIFICATION 214 AND 217.

4. USE S.S. SUPPORT CHAIRS FOR REBAR.

5. PAVED CONCRETE STRENGTH SHALL BE A MINIMUM OF 3,000 PSI.

9"

TYP

9"

TYP

MIN. PATCH WIDTH 4'-0"

1-1/4" STAINLESS STEEL

BAR - 18" LONG SPACING

- 18" O.C.

W 2.9 X W 2.9

MESH WIRE

EXISTING

CONCRETE

NTS

RECOMMENDED MIN.

TRENCH WIDTH

PIPE DIA. MIN. TRENCH WIDTH

23" 26" 28" 30" 34" 39" 48" 56" 64" 80" 96"

6" 8" 10" 12" 15" 18"

24" 30" 36" 48" 60"

W = TRENCH WIDTH

D = PIPE DIAMETER

W

PIPE

INITIAL BACKFILL

SCREENED GRAVEL

TO BE PLACED AND

COMPACTED

SEPARATELY

SCREENED GRAVEL

EXISTING

SOIL

NOTES:

1. INITIAL BACKFILL & BEDDING MATERIAL SHALL BE CLASS I OR CLASS II.

2. ALL PIPE SYSTEMS SHALL BE INSTALLED IN ACCORDANCE WITH ASTM D2321 ,

"STANDARD PRACTICE FOR UNDERGROUND INSTALLATION OF THERMOPLASTIC

PIPE FOR SEWERS AND OTHER GRAVITY-FLOW APPLICATIONS."

3. REFER TO SPECIFICATIONS 31 20 11 AND 33 40 00 FOR ADDITIONAL

INFORMATION.

4. 6" MIN. IF LEDGE IS ENCOUNTERED, THEN PROVIDE TO THE EXTENT OF OVER

BLOW.

FINAL BACKFILL PLACED AND

COMPACTED TO 95% IN 8" LAYERS

6" + 1/2D

2 D HAUNCHING AREA

6" BEDDING AREA

D

EXCAVATION DEPTH VARIES WITH

SOIL CONDITIONS. SEE NOTE 4.

NTS

NOTES:

1. PREPARE SOIL BEFORE INSTALLING BLANKETS, INCLUDING APPLICATION OF LIME, FERTILIZER, AND SEED. NOTE: WHEN USING CELL-O-SEED DO NOT SEED PREPARED AREA. CELL-O-SEED MUST BE INSTALLED WITH PAPER SIDE DOWN.

2. BEGIN AT THE TOP OF THE SLOPE BY ANCHORING THE BLANKET IN 6" DEEP X 6" WIDE TRENCH. BACKFILL AND COMPACT

THE TRENCH AFTER STAPLING.

3. ROLL THE BLANKETS (A) DOWN OR (B) HORIZONTALLY ACROSS THE SLOPE.

4. THE EDGES OF PARALLEL BLANKETS MUST BE STAPLED WITH APPROXIMATELY 2" OVERLAP. REFER TO GENERAL STAPLE PATTERN GUIDE FOR CORRECT STAPLE PATTERN RECOMMENDATIONS FOR SLOPE INSTALLATIONS.

5. WHEN BLANKETS MUST BE SPLICED DOWN THE SLOPE, PLACE BLANKETS END OVER END (SHINGLE STYLE) WITH APPROXIMATELY 4" OVERLAP. STAPLE THROUGH OVERLAPPED AREA, APPROXIMATELY 12' APART.

6. EROSION CONTROL BLANKET FOR USE ON SLOPES SHALL BE A BIODEGRADABLE DOUBLE NET WOVEN BLANKET WITH JUTE NETTING AND COCONUT FIBER MATRIX SPECIFICALLY MANUFACTURED FOR THE PURPOSE (NORTH AMERICAN

GREEN) ERONET S150 OR APPROVED EQUAL.

7. ONCE PERMANENT STABALIZATION IS ACHIEVED, REMOVE ANY NON -BIODEGRADABLE MESH, IF USED.

3B

3A

NTS

NTS

2016 ROAD & BRIDGE STANDARDS

NTS

OUTLET CONTROL

STRUCTURE (OCS) WEIR ELEVATION

OCS-4

OCS-8

OCS-10

OCS-9

1067.5

979.2 1078.5

1078.5

A

NTS

TOPSOIL AND SEED

NOTES:

1. SEE UTILITY PLANS FOR PIPE SIZES.

2. ALL COVERS SHALL BE H-20 LOAD RATED MIN. IN HEAVY LOAD AREAS

PVC CLEANOUT COVER IN

LAWN AREAS (4" BELOW F.G.)

CAST IRON COVER W/ BRONZE

PLUG IN PAVED AREAS (FLUSH

W/ PVMNT.)

COMPACTED SUBGRADE OR

UNDISTURBED NATIVE SOIL

UNDER PAVEMENT/GRASS PAVERS (HEAVY LOAD AREAS)UNDER LAWN

PVC WYE (45º BEND)

DRAIN PIPE

D.I. RISER (30" DEEP) W/

NO-HUB COUPLING TO PVC

PIPE IN PAVED AREAS

SAND BEDDING (12" MIN.

SURROUND)

PVC RISER

PVC FITTING (45º BEND)

PVC PIPE

A

TEE WYE AND DOUBLE WYE ELBOW

NOTES:

1. REFER TO SPECIFICATION 33 40 00 FOR ADDITIONAL INFORMATION

NTS

A

CK502

CIVIL DETAILS

Project Number

Building Number

Drawing Number

Project Title

Location

Issue Date Checked Drawn

Drawing Title

Approved:

VA FORM 08 - 6231

A

OFFICE OF

CONSTRUCTION

AND FACILITIES

MANAGEMENT

U.S. Department of Veterans Affairs

B

C

D

E

F

A

B

C

D

E

F

21 4 5 6 7 8 9 10

PhaseArchitect/Engineer of Record StampConsultant

321 4 5 6 7 8 9 10

Sprinkler Status

Correct Storm Water Drainage

1970 Roanoke Boulevard Salem, VA 24153-6404

658-23-108

01.28.2026 RBB KRS/PEH

100% FINAL DESIGN

# Revisions Date

Scientists I Engineers I Program Managers

Mabbett & Associates, Inc.

105 Central Street Stoneham, MA 02180-1248

T. 781-275-6050 www.mabbett.com

Mabbett

C

K d w g

Page of 59

NTS

NTS

2016 ROAD & BRIDGE STANDARDS

2016 ROAD & BRIDGE STANDARDS

NTS

NTS

CATCHBASIN

GRATE

POLYPROPYLENE

BOOT

CATCHBASIN

FRAME

OPTIONAL

OVERFLOW

DUMP STRAPS

EXPANSION RESTRAINT

" NYLON ROPE 2"

FLAT WASHERS)

DUMP STRAPS

SILT SACK

CATCHBASIN GRATE

BAG DETAIL

CROSS

SECTION

NOTES:

1. INSPECT AT MINIMUM WEEKLY OR AFTER RAIN EVENT.

2. MAINTAIN AS NECESSARY.

3. REPLACE SILT SACKS ONCE THE BAG IS FILLED HALF WAY WITH DEBRIS.

4. DO NOT EMPTY SILT SACK CONTENTS INTO CATCH BASIN.

2016 ROAD & BRIDGE STANDARDS

2016 ROAD & BRIDGE STANDARDS

NTS

NOTES::

1. THE CONTRACTOR SHALL SUBMIT BUOYANCY CALCULATIONS TO VERIFY THE

STRUCTURE'S RESISTANCE TO FLOTATION. IF ANCHORING IS NEEDED FOR RESISTANCE

TO FLOTATION, THE CONTRACTOR SHALL FURNISH AND INSTALL ANCHORING METHODS.

A

CK503

CIVIL DETAILS

Project Number

Building Number

Drawing Number

Project Title

Location

Issue Date Checked Drawn

Drawing Title

Approved:

VA FORM 08 - 6231

A

OFFICE OF

CONSTRUCTION

AND FACILITIES

MANAGEMENT

U.S. Department of Veterans Affairs

B

C

D

E

F

A

B

C

D

E

F

21 4 5 6 7 8 9 10

PhaseArchitect/Engineer of Record StampConsultant

321 4 5 6 7 8 9 10

Sprinkler Status

Correct Storm Water Drainage

1970 Roanoke Boulevard Salem, VA 24153-6404

658-23-108

01.28.2026 RBB KRS/PEH

100% FINAL DESIGN

# Revisions Date

Scientists I Engineers I Program Managers

Mabbett & Associates, Inc.

105 Central Street Stoneham, MA 02180-1248

T. 781-275-6050 www.mabbett.com

Mabbett

C

K d w g

Page of 59

1 ADDENDUM A - REVISION PER BIDDERS' QUESTIONS 9/30/2026

A

NTS

NTS

NTS

COMPRESSIVE

ALUMINUM SLOT

RISER WITH 5 IN

WIDE GRATE

STRENGTH CONCRETE

1/8" RECESS INTO

FINISHED PAVEMENT

PAVEMENT

H

ID

BASE MATERIAL

AS SOIL BACKFILL

STABLE, UNDISTURBED

EARTH OR COMPACTED

FILL

Nominal

Diameter, ID, in.

Depth of Invert, H, in.

Minimum Maximum

9.00 30.00

11.00 32.00

13.00 34.00

15.50 48.00

18.75 51.00

22.00 54.00

28.75 60.00

35.00 66.00

41.25 72.00

NOTES:

1. BACKFILL DESIGN SHOULD BE USED FOR NON-VEHICULAR LOADS ONLY.

2. ENSURE CONCRETE BACKFILL IS PROPERLY KNIFED UNDER THE LIP OF

THE SLOT FOR PROPER DESIGN SUPPORT.

3. SURFACE PAVEMENT ADJOINING THE SLOT SHOULD BE A NON-EROSIVE

MATERIAL.

4. SITE ENGINEER TO PROVIDE SITE SPECIFIC BACKFILL DETAILS, SUCH AS

PAVEMENT TYPE.

5. SLOT RECESS IS NOT INCLUDED IN DEPTH OF INVERT TABLES.

6. PAVED CONCRETE STRENGTH SHALL BE A MINIMUM OF 3,000 PSI.

H. (SEE TABLE)

MIN. AND MAX. COVERAGE TO BE CONFIRMED WITH MANUFACTURER

SEE "H" VALUE ON TABLE BELOW

SEE GRADING AND UTILITY PLANS

SEE GRADING AND UTILITY PLANS

SEE TABLE BELOW

PER

MANUFACTURER

SPECIFICATIONS

PER

MANUFACTURER

SPECIFICATIONS

SEE TABLE

4. THE CONTRACTOR SHALL SUBMIT BUOYANCY CALCULATIONS TO VERIFY THE STRUCTURE'S RESISTANCE TO

FLOTATION. IF ANCHORING IS NEEDED FOR RESISTANCE TO FLOTATION, THE CONTRACTOR SHALL FURNISH

AND INSTALL ANCHORING METHODS.

STANDARD GRATE INFORMATION

OPEN AREA,

SQ IN

37.44

NOTES:

1. ALL DIMENSIONS ARE FOR REFERENCE ONLY

2. GRATE MEETS HS-25 LOAD RATING PER AASHTO M306-10

3. THE SIZE OF OPENINGS MEET THE REQUIREMENTS OF THE

AMERICAN DISABILITY ACT, AS STATED IN FEDERAL REGISTER

PART III, DEPARTMENT OF JUSTICE, 28 CFR PART 36

Ø 1.00 in

Ø 0.41 in THRU 0.50 in

0.50 in

OPEN AREA, %

39.5

2.00 in

1.72 in

0.81 in

1.12 in

NOTE: ALL DIMENSIONS

ARE ± 1/2 FOOT.

4.81 in

19.69 in

NTS

2016 ROAD & BRIDGE STANDARDS

2016 ROAD & BRIDGE STANDARDS

NTS

PER MANUFACTURER'S RECOMMENDATIONS

MIN. AND MAX. COVERAGE TO BE CONFIRMED WITH MANUFACTURER

SEE GRADING AND UTILITY PLANS

SEE GRADING AND UTILITY PLANS

SEE EARTHWORK

SPECIFICATIONS

PER MANUFACTURER

SPECIFICATIONS

PER MANUFACTURER

SPECIFICATIONS

H. (SEE TABLE)

SEE TABLE

SEE "H" VALUE ON TABLE BELOW

SEE TABLE BELOW

4. THE CONTRACTOR SHALL SUBMIT BUOYANCY CALCULATIONS TO VERIFY THE STRUCTURE'S RESISTANCE TO

FLOTATION. IF ANCHORING IS NEEDED FOR RESISTANCE TO FLOTATION, THE CONTRACTOR SHALL FURNISH

AND INSTALL ANCHORING METHODS.

MANUFACTURER

A

A

CK504

CIVIL DETAILS

Project Number

Building Number

Drawing Number

Project Title

Location

Issue Date Checked Drawn

Drawing Title

Approved:

VA FORM 08 - 6231

A

OFFICE OF

CONSTRUCTION

AND FACILITIES

MANAGEMENT

U.S. Department of Veterans Affairs

B

C

D

E

F

A

B

C

D

E

F

21 4 5 6 7 8 9 10

PhaseArchitect/Engineer of Record StampConsultant

321 4 5 6 7 8 9 10

Sprinkler Status

Correct Storm Water Drainage

1970 Roanoke Boulevard Salem, VA 24153-6404

658-23-108

01.28.2026 RBB KRS/PEH

100% FINAL DESIGN

# Revisions Date

Scientists I Engineers I Program Managers

Mabbett & Associates, Inc.

105 Central Street Stoneham, MA 02180-1248

T. 781-275-6050 www.mabbett.com

Mabbett

C

K d w g

Page of 59

1 ADDENDUM A - REVISION PER BIDDERS' QUESTIONS 9/30/2026

STRUCTURE NAME INTERNAL HEIGHT "H"

(FT)

SIS-1

SIS-2A

7.0

3.0

CHAMBER TOTAL

STORAGE (CF)

30,561

5,187 22,295

19,452

2.5 2,077

SYSTEM INVERT

ELEVATION

1063.0

977.5 1074.0

1078.5

SIS-2B

SIS-3A

SIS-3B

7.0

7.0

977.5

STRUCTURE NAME INTERNAL HEIGHT "H"

(FT)

SDS-3 6.0

CHAMBER TOTAL

STORAGE (CF)

8,600

SYSTEM INVERT

ELEVATION

983.5

NEW DUCTILE IRON PIPE

COUPLING/PUSH ON JOINT

EXISTING PIPE

EXISTING WATER MAIN

MECHANICAL JOINT GATE VALVE & JOINTS

CAST IRON VALVE BOX

2-8" X 4" X 16" CONCRETE BLOCKS

WATER MAIN

TAPPING SLEEVE

MECHANICAL JOINTS

NEW DUCTILE

IRON PIPE

ACCESS TUBE

MASONRY RING

MECHANICAL JOINT

TAPPING GATE VALVE

VALVE BOX AND COVER

FINISHED GRADE

COUPLING MECHANICAL JOINT

A

SPACER

A

0.75

B

B

SECTION A-A SECTION B-B

0.125

0.125

EX. WATER PIPE

PROP. WATER PIPE

EX./PROP. GRADE

3 F T

MI

N.

C

OV

ER

3 F T

MI

N.

C

OV

ER

NEW DUCTILE IRON PIPE

EXISTING/PROPOSED GRADE

PROPOSED DRAINAGE PIPE

PROPOSED WATER, ELECTRICAL

OR COMMUNICATION INTERSECTING

UTILITY SECTION TO BE RELOCATED.

REFER TO CU101 TO CU112 SHEETS.

MI

N.

O F

1.5 F

T

VE

RT

IC

AL

CL

EA

RA

NC

E

BACKFILL

NOTES:

1. ASSUMED WORKING PRESSURE = 200 LB/IN^2

2. ASSUMED ALLOWABLE SOIL BEARING PRESSURE = 1,200 LB/FT^2

3. ALL BEARING SURFACES TO BE CARRIED TO UNDISTURBED GROUND

4. CONCRETE TO BE 3000 PSI MIN.

5. BLOCKS THICKNESS SHALL EQUAL PIPE DIAMETER PLUS 4" (A VALUE)

6. IN AREAS WHERE NOT ENOUGH SPACE IS AVAILABLE FOR THRUST BLOCK INSTALLATION, THE

CONTRACTOR SHALL PROVIDE MECHANICAL JOINT RESTRAINTS AS A SUBSTITUTE TO CONCRETE

THRUST BLOCKS

7. REFER TO SPECIFICATION 33 10 00 FOR ADDITIONAL DETAILS

X

X

X

X

BENDS

TEES

SECTION X-X CAPS

6"

W

W

6"

W/2 W/2

L

L

L

W

A

I N

L

PIPE SIZE 22.5° 45° 90°

TEE, WYE, DEAD END

L W

AREA

(SF)

L W

AREA

(SF)

L W

AREA

(SF)

L W

AREA

(SF)

8" 24" 20" 3.3 24" 39" 6.4 24" 72" 11.8 24" 51" 8.4

10" 26" 29" 5.1 26" 56" 10 26" 103" 18.5 26" 73" 13.1

SOIL TYPE: *ASSUMED TO BE DENSE FINE TO COARSE SAND (θ = 35°) TO BE CONFIRMED PER

CONTRACTOR'S GEOTECHNICAL INVESTIGATION

NTS

4" 20" 6"

0.8

20" 12"

1.6 20"

22" 3.0

20" 16"

2.1

6"

22" 13"

1.8

22" 24"

3.6 22"

44" 6.7

22" 31"

4.7

A

CK505

CIVIL DETAILS

Project Number

Building Number

Drawing Number

Project Title

Location

Issue Date Checked Drawn

Drawing Title

Approved:

VA FORM 08 - 6231

A

OFFICE OF

CONSTRUCTION

AND FACILITIES

MANAGEMENT

U.S. Department of Veterans Affairs

B

C

D

E

F

A

B

C

D

E

F

21 4 5 6 7 8 9 10

PhaseArchitect/Engineer of Record StampConsultant

321 4 5 6 7 8 9 10

Sprinkler Status

Correct Storm Water Drainage

1970 Roanoke Boulevard Salem, VA 24153-6404

658-23-108

01.28.2026 RBB KRS/PEH

100% FINAL DESIGN

# Revisions Date

Scientists I Engineers I Program Managers

Mabbett & Associates, Inc.

105 Central Street Stoneham, MA 02180-1248

T. 781-275-6050 www.mabbett.com

Mabbett

C

K d w g

Page of 59