S01 12FPC326B0004 Attachment 2 DRAWINGS G Street EWP Design_Complete_4.27.26_Edited.pdf

DRAWINGS PREPARED UNDER THE AUTHORITY OF

THE EMERGENCY WATERSHED PROTECTION ACT

BY THE NATURAL RESOURCES CONSERVATION SERVICE

OF THE UNITED STATES DEPARTMENT OF AGRICULTURE

THUNDERHILL RUN - G STREET SITE

MINERAL COUNTY, WEST VIRGINIA

INDEX TO DRAWINGS

SHEET DESCRIPTION

1 COVER SHEET

2 CONSTRUCTION NOTES AND QUANTITIES

3 SITE MAP

4 TYPICAL 7.5' GABION WALL DETAILS

5 TYPICAL 7.5' GABION WALL COUNTERFORT DETAILS

6 TYPICAL GABION BASKET DETAILS

7 TYPICAL FOUNDATION PREPARATION ON SHALLOW BEDROCK DETAILS

8 TYPICAL FOUNDATION PREPARATION ON ROCK RIPRAP DETAILS

9 TYPICAL CHANNEL BOTTOM CONFIGURATION

10 TYPICAL GROUTED ROCK RIPRAP SECTION & DETAILS

CALL

BEFORE YOU DIG

STOP

1-800-245-4848 www.muwv.org

MISS UTILITY OF

WEST VIRGINIA, INC.

IT'S THE LAW!

K E N T U C K Y

O H I O

V I R G

I N I A

P E N N S Y L V A N I A

M A R Y L A N D

JOB APPROVAL

CLASS - V

KEYSER

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SITE LOCATION

39° 26' 41" N 78° 59' 18" W

SITE LOCATION

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LOCATION MAP

AutoCAD SHX Text WV-ENG-46 USDA-NRCS USDA-NRCS 1/77 (Rev. 11-04) UTILITY NOTIFICATION

AutoCAD SHX Text "The Natural Resources Conservation Service make no representation as to the existence or non-existence of any utilities at the construction site. Shown on these construction drawings are those utilities which have been identified. It is the responsibility of the landowners or operators and contractors to assure themselves that no hazard exists or damage will occur to utilities."

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126116

G

AS

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AS

24'

18'

54' 12'

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39° 26' 41" N 78° 59' 18" WFeet

0 40 80

STREAM THALWEG

THUNDERHILL RUN

~6' BOTTOM WIDTH

HOUSE

G STREET

(3) 7.5' COUNTERFORTS

WALL

STA: 0+00 - 0+54

7.5' GABION WALL

(SEE DETAIL SHEET 4)

STAGING

AREA

LIMITS OF

CONSTRUCTION

SIDEWALK(S)

DO NOT DISTURB

GARAGE

ST

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WALL (DO NOT DISTURB)

WALL

*PEDESTRIAN BRIDGE WITH

GAS LINE ATTACHED

DO NOT DISTURB

*DRIVEWAY BRIDGE WITH

CONCRETE ABUTMENTS

PROHIBITED ACCESS FOR

CONSTRUCTION EQUIPMENT

CONCRET

E

DRIV

EW

AY

FENCE

DO NOT DISTURB

PIPES

WATERLINES RUNNING

UNDER BRIDGE

UP

UP

MH

MH MH

FIRE HYDRANT

DO NOT DISTURB

UP

OVERHEAD

ELECTRIC LINE

MH - MANHOLE COVER LOCATION

UP - UTILITY POLE LOCATION

ACCESS LOCATION

(NOT ON BRIDGE)

WELL BUILDING

DO NOT DISTURB

3' GROUTED ROCK RIPRAP

4' HIGH, 2' EMBED @ 2:1

KEYS PER COR ONSITE

(SEE DETAIL SHEET 10)

5' GROUTED ROCK RIPRAP

4' HIGH, 2' EMBED @ 2:1

KEYS PER COR ONSITE

(SEE DETAIL SHEET 10)

* BRIDGE ABUTMENTS SHALL BE

PROTECTED DURING INSTALLATION

OF GROUTED ROCK RIPRAP.

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5.5' 9.5

6°

TYPICAL GABION WALL 7.5 FEET HIGH

Geotextile

Provide Positive

Drainage

Excavation Limits, Backfill With Existing On-Site Earthfill & Rockfill Materials After Gabion Installation (See Construction Specifications

23 - Earthfill & 25 - Rockfill)

Finished Grade Stream Bottom See Typical Channel Bottom Configuration

Sheet 9

2' Min.

2' Min. Embedment or to Bedrock, Whichever is Less

If Bedrock is Less than Two Feet, then See Foundation Preparation on Shallow

Bedrock (Sheet 7)

3'x3'x6'

4.5'x3'x12'

1.5'x3'x6' 1.5'

1.5'

1' Minimum

0.63'

Excavation Limits, Backfill After Gabion

Installation Notes:

1. Refer to sheet 2 for estimated quantities.

2. After the foundation is excavated, NRCS representative shall determine if foundation preparation treatment will be required and type. See conditional foundation preparation details on sheets 7 and 8.

3. The contractor shall only excavate the amount of foundation needed to install the bottom layer of gabion wall intended to place per manufacturer's recommendations during the same workday.

4. Backfill behind each layer of gabions as the layers progress vertically. Backfill materials shall be approved and be free of trash, concrete, woody debris, etc. Conserve suitable materials for final grading and seeding operations.

NOT TO SCALE

1' Min. Backfill Topsoil on Top of Gabion

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NOT TO SCALE

6'

12'

9'

9'

TYPICAL COUNTERFORT DETAILS 7.5 FT. GABION WALL

NOT TO SCALE

Counterfort

3' 7.5'

3'x3'x6'

4.5'x3'x12'

1.5'x3'x6'

1.5'x3'x9'

3'x3'x12'

3'x3'x9' 3'x3'x6'

3'x3'x6'

3'x3'x6'

3'x3'x6'

3'

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1/3 H

1/3 H

1/3 H

1/3 L 1/3 L

1/3 L 1/3 W

1/3 W 1/3 W

INTERIOR SUPPORT DETAIL

TIERED BASKET TO BASKET

LACING PLAN

VERTICAL EDGE

5" 5" WIRE DOUBLED

BACK AND TWISTED

LACING DETAIL

12' BASKET

VERTICAL EDGE

TOP EDGE

TOP EDGE

6' BASKET

12' BASKET

TOP EDGE

TOP EDGE

VERTICAL EDGE

ADJACENT BASKET TO BASKET

LACING PLAN

BASKET LIDBASKET LID

DIAPHRAGM

DIAPHRAGM

VERTICAL EDGE

CONSTRUCTION NOTES

1. Each vertical seam shall be laced prior to setting basket in place and prior to lacing to adjoining baskets.

2. Each basket shall be laced to the adjoining basket at all vertical edges and horizontal edges.

3. Each diaphragm shall be laced to the lid of the basket after closing. Diaphragm shall be laced along all sides.

4. All lacing shall be done with 13.5 gauge wire using the two, one, two, looping procedure as shown in the lacing detail.

5. All wire shall be tightly laced and the ends of the lacing wire shall be doubled back and twisted not less than three turns around itself in a length not greater than one inch.

6. Install according to manufacturers recommendations.

7. Gabion basket length may vary from typical layer diagram where applicable to stagger seam with layer below as approved by the NRCS representative.

NOT TO SCALE

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Bedrock

Plan View of Gabions & Rebar/Drillhole Pattern

1' Max

Varies

Profile View of Proposed Gabions with Rebar Spacing

1' Max

1' Min to 1.5' Max

1' Min to 1.5' Max Typical Each Side

Section View of Proposed Gabions with Rebar Spacing

Maximum Angle of Rebar/Drillhole Pattern

15°'

Back of BasketFront of Basket

Bedrock

Bedrock

Vertical No. 10 Rebar

Max Tilt of Rebar/Drillhole

Back of BasketFront of Basket BackfillStreamside

0' to 2' Max

Stream Bottom

0' to 2.0' Max

Note:

1. Drill holes for Rebar shall be 13

8 " diameter. The use of epoxy or non-shrink grout is not required. The rebar shall be driven by hammer to the required depth without bending.

2. Care shall be taken by the contractor to prevent damage to the rebar during gabion filling operations.

3. Different gabion bottom basket configurations will require additional rebar by repeating the pattern shown. Quantities on Sheet 2 based on bottom width x length.

4. Final pattern and spacing to be directed by NRCS representative in the field.

Foundation Preparation Payment Limits

Varies

Varies

Stream Bottom

1.25'No. 10 Rebar Typical

1.25' 1.25'

No. 10 Rebar Typical

2.5' Max.

1.25'

2.5' Max.

2.5' Max. 2.5' Max.

Foundation Preparation Payment Limits

4.5' Min.

2.5'

1.5'

Varies

2.5'

No. 10 Rebar

~1.5'

~2.5'

FOUNDATION PREPARATION on SHALLOW BEDROCK (Use When Bedrock is Less than Two Feet From Stream Bottom)

Conditional

1' Min to 1.5' Max

1.5'

2.5'

NOT TO SCALE

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7.5'

9.5

6°

Section - Gabion Wall

Geotextile

Provide Positive

Drainage

Finished Grade Stream Bottom

NRCS Representative Will Determine Depth of Rock Riprap in the Field

Depth of Rock Assumed for Foundation = 3' For Quantity Estimates

Foundation Preparation Payment Limits

( Width = Bottom Gabion Layer Width + 6', Depth = 3')

Rock Riprap Foundation Preparation 6"-18" Gradation

3' Min.

NRCS Representative will determine distance based on actual site conditions. Assumed

3' for quantities on Sheet 2.

Geotextile

Excavation Limits, Backfill After Gabion Installation

Excavation Limits, Backfill After Gabion

Installation

1.5'

1.5'

0.62'

Not to Scale

2'

Foundation Preparation Rock Riprap Conditional

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Notes:

1. Final location of subchannel to be located in the field by the NRCS representative. The subchannel shall be transitioned as necessary to meet existing grades at the upstream and downstream site extents.

2. Subchannels are not required for bedrock streambeds.

3. Use material from the required excavations and/or approved fill from offsite to reconstruct streambanks as necessary. Seed and mulch per construction specification 6, Seeding, Sprigging and Mulching.

4. Actual gabion configuration and height may vary.

7.5'

1/3 BW

(See Site Plan)

Provide Positive Drainage

~21

~1

~1

Final Stream Bottom Shall be Rough & Irregular Provide Positive Drainage Toward Subchannel Deposition (Varies)

Existing Ground

Subchannel

Bottom Width = 6'

NOT TO SCALE

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EXISTING

GROUND

EXCAVATION

LIMITS

2' KEY DEPTH

MATCH GABION KEY

CHANNEL BOTTOM

GEOTEXTILE

TYPICAL GROUTED ROCK RIPRAP SECTION

BEDROCK

2'- 6" EQUAL EQUAL

#10 x 4' REBAR 5' C.C MAX.

DRILL 1-3/8" DIA HOLE INTO BEDROCK.

EPOXY OR GROUT NOT REQUIRED.

2' OF 12" D50 ROCK RIPRAP PLACED WITH

VOIDS FOR GROUT PLACEMENT . FOR DETAILS,

SEE CONSTRUCTION SPECIFICATION 62.

1' MIN. OF TOPSOIL ON GEOTEXTILE

OVER TOP OF RIPRAP. PROVIDE

POSITIVE DRAINAGE.

1'

KEY INSTALLATION SHALL BE

IDENTIFIED IN FIELD BY COR TO

AVOID ISSUES WITH EXISTING

STRUCTURES & GABIONS.

4.5'

FLOW

OR

BEGINNING/END OF ROCK

RIPRAP STABILIZATION

PLAN - RIPRAP KEY

GEOTEXTILERIPRAP BLANKET

ROCK RIPRAP WITH GROUT

TOP OF ROCK RIPRAP SLOPE

TOE OF ROCK RIPRAP SLOPE

INSTALL ALONG SLOPE FROM

THE TOE OF EXCAVATION TO

TOP OF ROCK RIPRAP.

TYP.

RIPRAP KEY

4'

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