Bull_Creek_Site_7_Drawings.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

SHEET

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2.

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4.

INDEX

CONTENTS

Cover

McDowell

Construction Notes and Quantities Lacing Details (All Sites) Typical Channel Bottom Configuration Site 7 Location Map Site 7 Plan Map Typical 9 Ft. Gabion Section

UTILITY NOTIFICATION

Site 7

County, West June 2015

(All Sites)

"The Natural Resources Conservation Service makes no representation as to the existence or non-existence of any utilities at the construction site. Sholfll on these construction drawings are those utilities which have been identified. It is the responsibility of the contractor(s) to assure themselves that no hazard exists or damage will occur to utilities.•

Know what's below.

Call before you dig.

McDOWELL COUN'

Virginia

Pl•RSYLV•RIA

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LOCATION MAP

JOB APPROVAL

CLASS IV

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GABION NOTES

1. Gabions shall be keyed a minimum of 1.5 feet into the bottom of existing stream if not resting on bedrock.

2. Excavation prior to gabion placement shall be limited to the minimum amount necessary to perform the work and assure a stable excavation site.

3. Material from the required excavation shall be used for required earthfill behind gabions.

4. Additional material may be needed for backfill. Material must be approved for use.

5. Backfill shall be placed at ends of gabions to form a smooth transition from gabions to original ground.

6. All angles and curves in the gabions shall be as per manufacturer's recommendation and shall provide a continuous structure.

7. Final lines and grades will be determined in the field by the NRCS Representative at the time of construction.

4. Any drain pipes encountered in the work shall be extended through the gabions using schedule 40 pipe of the same diameter. The pipe shall extend to the face of gabion wall and shall be connected to existing pipe with flexible dresser couplings secured with clamps.

5. ne-ins to existing walls may require saw cutting and/or hand work to achieve a neat, workmanlike appearance.

No gaps shall be left between existing walls and planned gabion baskets. Hand placement of field or gabion stone and bonding with Sakrete or approved equivalent may be necessary as approved by the engineer.

6. NRCS will mark limits of work in the field.

CONSTRUCTION NOTES

1. Access roads shall be restored to pre-construction condition or better.

2. All fences removed and/or damaged as a result of the contractor's operations shall be restored to a condition equal to or better than they existed before start of work.

3. Soil in locations compacted as a result of construction operations shall be loosened for a depth of 6-inches below the compacted soil layer and re-graded to blend with existing ground.

4. Provide sub-channel as shown on "[xpjcal Channel Bottom Configuration drawing.

5. While working in the stream all efforts will be made to reduce downstream impacts including keeping the excavator tracks elevated above flowing water. A diversion berm shall be established at the top of each stream access point to minimize surface water from flowing toward the stream.

6. Site access shall be off the main road and shall be in accordance with all West Virginia Department of Highways rules and guidelines.

Table of Quantities Site Geotextile S.Y. * Gabion Baskets C.Y.**

7 BB 90

• The area required for overlaps is not included in the quantity for geotextile. Geotextile is subsidiary to wire mesh gabions.

** Gabion quantity may vary due to changes during construction.

7. Excess material from the excavation & obstruction removal shall be wasted off-site in accordance with all local, state, & federal regulations and as approved by the NRCS representative.

8. Trash, tires, & woody debris within the work limits shell be disposed of off-site in en approved landfill.

The contractor shall be responsible for the landfill tipping fees.

9. Crossing private bridges is prohibited.

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BASKET LID

DIAPHRAGM

6' BASKET

"""'" - I I . ,,, TOP EDGE EDGE

TOP EDGE I ...,,.

VERTICAL

EDGE

VERTICAL EDGE

TOP EDGE

VERTICAL EDGE

TIERED BASKET TD BASKET

LACING PLAN

CONSTRUCTION NOTES

1. Eo.ch vertlco.l seo.M sho.ll be Lo.cecl prior to setting bo.sket In plo.ce o.ncl prior to lo.clng to o.cljolnlng bo.skets.

2. Eo.ch bo.sket sho.ll be Lo.cecl to the o.cljolnlng bo.sket

o. t o.ll vertlco.L eclges o.ncl horlzonto.l eclges.

3. Eo.ch cllo.phro.gl"I sho.ll loe lo.cecl to the llcl of the loo.sket o.fter closing. Dlo.phro.gl"I sho.ll loe lo.cecl o.ll slcles.

4. All lo.clng sho.ll loe clone with 13.5 go.uge wire using the two, one, two, looping proceclure o.s shown In the lo.clng cleto.11.

5. All wire sho.ll be tightly lo.cecl o.ncl the encls of the lo.clng wire sho.ll loe olouloleol bo.cl< o.nol twlstecl not less tho.n three turns o.rouncl ltsel f In o. length not greo. ter tho.n one Inch.

6. lnsto.ll o.ccorcllng to Mo.nufo.cturers recoMMenclo.tlons.

VERTICAL EDGE

INTERIOR

BASKET

ADJACENT BASKET TD BASKET

LACING PLAN

5' 5' \./IRE DOUBLED

BACK AND T\./ISTED

DETAIL LACING DETAIL

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APPROXIMATE J

EXISTING GROUNDLINE ___./ \

I

RECONSTRUCTED STREAMBANK, USE

DEPOSITION REMOVED FROM STREAM,

SEED AND MULCH.

NOTES:

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L1/3 BWJ

SUB-CHANNEL

BOTTOM WIDTH (BW)

(SEE SITE PLAN)

FINAL STREAM BOTTOM SHALL

BE ROUGH AND IRREGULAR

1. FINAL LOCATION OF SUB-CHANNEL TO BE LOCATED IN THE FIELD BY ENGINEER. TYPICALLY NEAR MIDDLE OF STREAM BOTTOM, BUT SHIFTED AWAY FROM TOE OF RESTORED STREAMBANK. LENGTH OF SUBCHANNEL IS EQUAL TO

EXTENTS OF UPSTREAM & DOWNSTREAM CONSTRUCTION LIMITS.

2. SUB-CHANNELS ARE NOT REQUIRED FOR BEDROCK STREAMBEDS.

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United States Department of

Nat I Agriculture

C ura Resou onservation srces. erv1ce

Designed LS --- Drawn LS ---==---- Checked SW --=---- Approved SW

United States Department of Agriculture

Natural Resources Conservation Service

2015 EWP STREAMBANK STABILIZATION

McDowell County. West Virginia

Site 7 Plan View

D•igned-"LS=------...

t"!!"'-"""!'!--1

Drawn LS 06/15 Drawing Name checked ..... sw--..... ___ a_u .... 1 ..... s 1-!!!!'!!!'!!!!!"!!"!!!"!!!'!-I

Approved SW 06/15 T/T/IS 3.-«J 1t1 Sheet 6 of 7

1 Rottom , I Cbnnne TllPiCQ t ••see ±ion Shee Configure

3 1x 3 1

GABI ON

---- PROVIDE POSITIVE

DRAINAGE

BACKFILL

LIMITS

9 Ft.

**FINAL I STREAM

WIDTH = 22'

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__ J __ 1 I EXCAVATION ,/ I LIMITS I

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3'x 3'

GABI ON

3'x 1.5'

GABI ON

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FINISH I GRADE

STREAM BOTTOM *SLOPE WILL BE STEEPER

AT HOUSE CORNER

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L -_ _J..rf.O-Ff:" ~INIMUM 2 Ft.

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1.5 Ft. MINIMUM OR TO

BEDROCK. WHICHEVER

IS LESS REFER SHEET 2 FOR QUANTITIES

TYPICAL GABION WALL 9 FEET HIGH

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