S01 Attachment 2 Drawings.pdf

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Kanawha County

UTILITY NOTIFICATION

"The Natural Resources Conservation Service makes 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 contractor(s) to assure themselves that no hazard exists or damage will occur to utilities."

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Sheet List Table Sheet Number Sheet Title

1 Cover Sheet 2 Quantities and Construction Notes 3 Location Map 4 Plan View 5 7.5' Gabion Typical Section 6 4.5' Gabion Typical Section 7 Gabion Details 8 Foundation Preparation on Shallow Bedrock 9 Gabion Typical Section with Riprap Foundation

10 Typical Channel Bottom Configuration

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%%ULOCATION MAP

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JOB APPROVAL

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CLASS V

AutoCAD SHX Text DRAWINGS PREPARED UNDER THE AUTHORITY OF THE EMERGENCY WATERSHED PROTECTION ACT by the Natural Resources Conservation Natural Resources Conservation Service of the United States Department of the United States Department United States Department of Agriculture Little Creek EWP Little Creek Church Kanawha County, West Virginia

AutoCAD SHX Text 2023 EWP STREAMBANK STABILIZATION KANAWHA County, West Virginia County, West Virginia LITTLE CREEK CHURCH COVER SHEET

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* The area required for overlaps is not included in the quantity for geotextile.

Little Creek Church 7.5' Wall 76 NA 80 As

Needed 360 120 154 Little Creek Church

4.5' Wall 22 NA 10.5 As Needed 63 32 54

TOTAL 98 NA 90.5 As Needed 423 152 208

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10CONSTRUCTION NOTES

1. Call 811 to locate utilities prior to mobilization and excavation.

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

3. 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 the start of work.

4. Soil 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.

5. Provide sub-channel as shown on Typical Channel Bottom Configuration, sheet 10, drawings.

6. 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.

7. Required pollution control measures shall be installed as needed in accordance with Pollution Control Specification 5.

8. Site access shall be off the main road and shall be in accordance with all West Virginia Department of Highways rules and guidelines. The contractor shall provide signage and flagmen for traffic control as required.

9. 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 in the field. Floodplains will not be allowed as waste areas under any circumstances. Waste areas shall be seeded according to construction specification 6, Seeding, Sprigging and Mulching.

10. The contractor shall provide approved fill as required to complete the work.

11. All debris within work limits shall be disposed of off-site in an approved landfill. The contractor shall be responsible for the landfill tipping fees.

12. All drain pipes encountered in the embankment shall be extended through the riprap and/or gabions with the same pipe material or better to the face of the slope or baskets.

13. Drainage pipes 12" diameter and larger shall be encased in a minimum of 6" of concrete when passing through rock riprap.

Concrete shall have a minimum compressive strength of 2500 psi.

14. The contractor shall maintain the cleanliness of public and private roads impacted by hauling operations during the duration of the work.

15. Starting location of baskets will be marked in the field.

16. Reshape stream banks at the upstream and downstream ends of gabion walls to transition to baskets as directed by NRCS representative.

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AutoCAD SHX Text Table of Estimated Quantities

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AutoCAD SHX Text Gabion Geotextile SY*

AutoCAD SHX Text Riprap Tons

AutoCAD SHX Text Gabions CY

AutoCAD SHX Text Earth Fill CY

AutoCAD SHX Text Foundation Prep Shallow Bedrock SF

AutoCAD SHX Text Foundation Prep Rock Riprap Tns

AutoCAD SHX Text Foundation Prep Geotextile SY

2023 EWP STREAMBANK STABILIZATION KANAWHA County, West Virginia County, West Virginia LITTLE CREEK CHURCH QUANTITIES AND CONSTRUCTION NOTES

Little Creek Church 38.19151°, -81.50369°

21.0' of Gabions 4.5' High

Private Bridges Do Not Disturb

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Utility Pole

Little Creek Church

Manhole

4" PVC Drain Line

60' of Gabions 7.5' High

Obstruction Removal Approximately 125 CY

16.0'

Remaining Section of Sidewalk to be Removed to

Facilitate Gabion Installation

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Feet 0 2000 4000

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2023 EWP STREAMBANK STABILIZATION KANAWHA County, West Virginia County, West Virginia LITTLE CREEK CHURCH LOCATION MAP

21.0' of Gabions 4.5' High

Private Bridges Do Not Disturb

Li ttl e Cr ee k

Utility Pole

Little Creek Church

Manhole

4" PVC Drain Line

G

G G

W

W

60' of Gabions 7.5' High

Obstruction Removal Approximately 125 CY

16.0'

Remaining Section of Sidewalk to be Removed to

Facilitate Gabion Installation

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LEGEND

Construction Limits Toe of Stream Bank Water Line Sewer Line Gas Line Electric Line

*Features in this legend may or may not be present in the drawing.

E E E

W W W S S S G G G

Little Creek Plan View N38.19151° W81.50369°

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Feet 1:360.001

60300 15

Chain Link Fence to be Removed by Landowner

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2023 EWP STREAMBANK STABILIZATION KANAWHA County, West Virginia County, West Virginia LITTLE CREEK CHURCH PLAN VIEW

5.5' 9.5

6°

Geotextile

Provide Positive

Drainage

Finished Grade Stream Bottom

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

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

Bedrock ( Rebar Anchoring Detail)

3'x3'

1.5'

1.5'

1' Minimum

7"

Excavation Limits, Backfill After Gabion

Installation

3'x1.5'

7.5' GABION WALL WITH VERTICAL FRONT FACE

LITTLE CREEK CHURCH

SEE PLAN VIEW

(Not to Scale)

Excavation Limits Backfill After Gabion Installation

Top Row May Need to be Removed in Situations Where Stream Bottom Prevents Embedment

2.0' Min.

Wrap Top of Baskets with Geotextile and Cover with Top Soil when Top of Wall is Low Enough to Still Provide Positive Drainage

Finished Grade

1.5'x3'

6'x3'

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1. See typical channel bottom configuration sheet 10

2. Refer to sheet 2 for estimated quantities

3. After the foundation is excavated, NRCS representative will determine required foundation treatment. See foundation details on other sheets.

4. The foundation shall not be excavated unless the bottom row can be completely installed within 24 hrs.

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2023 EWP STREAMBANK STABILIZATION KANAWHA County, West Virginia County, West Virginia LITTLE CREEK CHURCH 7.5' GABION TYPICAL SECTION

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1'

9.5

6°

TYPICAL GABION WALL 4.5 FEET HIGH

Provide Positive

Drainage

Finished Grade Stream Bottom

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

(Rebar Anchoring Detail)

1' Minimum

0.5' Geotextile

Excavation Limits, Backfill After Gabion Installation

Excavation Limits Backfill Each Gabion Row as Each Row is Completed

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1. See typical channel bottom configuration sheet 10

2. Refer to sheet 2 for estimated quantities

3. After the foundation is excavated, NRCS representative will determine required foundation treatment. See foundation details on other sheets.

4. The foundation shall not be excavated unless the bottom row can be completely installed within 24 hrs.

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2023 EWP STREAMBANK STABILIZATION KANAWHA County, West Virginia County, West Virginia LITTLE CREEK CHURCH 4.5' GABION TYPICAL SECTION

3'

4.5'

6'

Layer 1

Layer 2

Layer 3

Layer 3 Layer 2 Layer 1

6' 4.5' 3'

Fr on t F ac e

Fr on t F ac e

Fr on t F ac e

6' 4.5' 3'

12' 12' 12'

6x3x1.5

6x3x3

7.5' Wall as Example

3' Wall Base6' Wall Base9' Wall Base

Gabion Wall Base Layout No Scale

Gabion Wall Isometric No Scale

12x4.5x3

(1 2, 9, or

)x

3x 1.

5'

(1 2, or

)x

4.

5x

3'

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

LACING DETAIL

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.

5" 5"

Wire Doubled Back and Twisted

Horizontal Edge

Vertical Seam

Horizontal Edge

6x3x3'

6x3x3'

6x3x3'

6x3x3'

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2023 EWP STREAMBANK STABILIZATION KANAWHA County, West Virginia County, West Virginia LITTLE CREEK CHURCH GABION DETAILS

Bedrock

Foot Print of Planned Gabions & Rebar/Drillhole Pattern

1' Max

Varies

Front Face of Proposed Gabions with Rebar Spacing

1' Max

1' Min to 1.5' Max

1' Min to 1.5' Max Typical Each Side

Side 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

Notes:

1. Drill holes for Rebar shall be 1 3/8" 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.

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 Limits4.5'

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)

(No Scale)

1' Min to 1.5' Max

1.5'

2.5'

Note: Final pattern and spacing to be directed by NRCS technician in the field.

Finished Grade

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2023 EWP STREAMBANK STABILIZATION KANAWHA County, West Virginia County, West Virginia LITTLE CREEK CHURCH FOUNDATION PREPARATION ON SHALLOW BEDROCK

5.5'

Provide Positive

Drainage

Finished Grade Stream Bottom

7"

Gabion Section on Riprap Foundation

Depth of Rock of Foundation to be Determined by NRCS Representative in Field. Max Depth of 3'.

12' Foundation Preparation

Payment Limits

Rock Riprap Foundation Preparation 6"-18" Gradation

3' Min.

Geotextile

Excavation Limits, Backfill After Gabion

Installation

3' Min.

Fill Voids on Surface of Riprap with Gabion Stone to Provide Smooth Surface for Gabions

Excavation Limits

2.0'

Finished Grade

9.5

6°

1 1.5'

1.5'

3'x1.5'

Top Row May Need to be Removed in Situations Where Stream Bottom

Prevents Embedment

Wrap Top of Baskets with Geotextile and Cover with Top Soil when Top of Wall is Low Enough to Still Provide Positive Drainage

6'x3'

3'x3' 1.5'x3'

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Notes:

1. See typical channel bottom configuration sheet.

2. Refer to Sheet 2 for estimated quantities.

3. Actual gabion configuration may vary.

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2023 EWP STREAMBANK STABILIZATION KANAWHA County, West Virginia County, West Virginia LITTLE CREEK CHURCH GABION TYPICAL SECTION WITH RIPRAP FOUNDATION

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.

Varies

3 BW

~ 1

(See Site Plan)

Provide Positive Drainage

~2

~1

~1

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

Existing Groundline

Subchannel

Bottom Width (BW)

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2023 EWP STREAMBANK STABILIZATION KANAWHA County, West Virginia County, West Virginia LITTLE CREEK CHURCH TYPICAL CHANNEL BOTTOM CONFIGURATION