drawings.pdf

SITE MAP

SCHEDULE OF ITEMS

TYPICAL DIVERSION CHANNEL

(incidental to pay item # 15713)

Road C/L

Sand bags, sheet piling, or both to provide temporary dam

Note:

Earthen dams will not be allowed to block existing stream during construction of diversion channels on this project.

Exist. culvert to be removed

Stream

Variable Width

2:1 Slope 2:1 Slope

Fabric liner

Sand bags or rocks to hold fabric liner in place

Note:

Width of channel shall be wide enough to prevent flooding and erosion during peak water flows.

Preferably as wide as the existing channel.

Variable Depth

Constructed diversion channel (can be constructed on either side of stream)

High water surface

Construction Notes

1) CONSTRUCTION SPECIFICATIONS: Standard Specification for Construction of Roads and Bridges on Federal Highway Projects, FP-03 U.S. Customary Units, shall apply to this contract.

2) Minor amounts of clearing and grubbing are required for culvert replacement. Limbs, logs, & stumps may be scattered outside the clearing limits. This work shall be considered incidental to Pay Item 20304-Removal.

3) Maintenance for traffic will be the responsibility of the Contractor. Road closures will be accompanied by road detours in accordance with the Manual of Uniform Traffic Control Devices guidelines. This work shall be considered incidental to Pay Item 15101-Mobilization.

4) Contractor shall not construct these projects during abnormally high flows.

5) The Engineer shall be notified of any road closures one week prior.

6) Contractor is responsible for properly disposing of old culverts off of Forest Service lands.

7) Install culvert in locations as staked by the engineer. Bedding and pipe placement shall be approved by the engineer before backfilling begins.

8) Reconstruction of the subgrade shall be required before placing surfacing material and shall be considered incidental to Pay Item 20407. No excavated materials shall be wasted outside of the clearing limits unless Approved by the Engineer.

9) All select borrow material shall be a silt and sand mixture and meet the standard of FP-03 Subsection 704.07.

10) Riprap shall be embedded into the embankment such that the final surface of riprap will be flush with surrounding embankment.

11) Seed mixture: 55% oats, 25% virginia wild rye (elymus virginicus) or canada wild rye (elymus canadensis), 10% slender wheatgrass (elymus trachycalus), 10% Native Forb Mixture, provided by U.S. Forest Service native seed reserve.

Seeding Rates: Oats = 15 pounds per acre All others = 10 pounds per acre

12) Apply Seed, Fertilizer, and Erosion Control Mat in all disturbed areas of the project.

0.02 FT/FT

2:1 Slope

TYPICAL ROAD CROSS SECTION

26' Finished Width

C/L 14' 14'

0.02 FT/FT

24' Finished Width

13' 13'

2:1 slope

6" (COMPACTED DEPTH) CRUSHED

GRAVEL SURFACE COURSE

BLEND SLOPE TO

MATCH TOP OF

HEADWALL

BLEND SLOPE TO

MATCH TOP OF

HEADWALL

C/L

EROSION

CONTROL

TYPICAL SILT FENCE

CULVERT PLAN VIEW

SIZE: 16'-6" SPAN X 6'8" RISE X 31.5' LONG ALUMINUM BOX CULVERT

HS-25 LOADING, MIN. COVER = 1.4', MAX. COVER = 4.0'

WITH FULL INVERT, ALUMINUM HEADWALL & WING WALL PANELS

BOX CULVERT CROSS SECTION

HS-25 LOADING, MIN. COVER = 1.4', MAX. COVER = 4.0'

WITH FULL INVERT, ALUMINUM HEADWALL & WING WALL PANELS

BOX CULVERT PROFILE

HS-25 LOADING, MIN. COVER = 1.4', MAX. COVER = 4.0'

WITH FULL INVERT, ALUMINUM HEADWALL & WING WALL PANELS

2' TOE WALL PLATE,

PROTECTION FROM

UNDERMINING.

NEW ROAD SURFACE ELEV. = 101.32'.

SUBGRADE ELEV. = 100.82'

SURFACE COURSE = 6" COMPACTED CRUSHED GRAVEL

EXIST. ROAD SURFACE

ELEV. = 99.63'

HEADWALL AND

WING WALL

PANELS

EMBEDDED INTO

GROUND

EXISTING CULVERT PIPE

AND HEADWALL TO BE

REMOVED

CLASS 4 RIP RAP - EXTENDS

5' OUT FROM WING WALLS

AND END OF PIPE.

S ta

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24" ENTRENCHMENT

INTO GROUND

SELECT BORROW

HEADWALL CAP

Anchor Rod

END

PANEL

END

PANEL

CENTER PANEL

WING WALL

ELBOW

CAP

REINFORCING

RIB

WALE BEAM

BOX CULVERT INSTALLATION

HS-25 LOADING, MIN. COVER = 1.4', MAX. COVER = 4.0'

WITH FULL INVERT, ALUMINUM HEADWALL & WING WALL PANELS

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ANCHOR ROD

ATTACHMENT

FIELD DRILL HOLE

IN RIB

ANCHOR ROD

HEADWALL

CAP

ALUMINUM BRACING ASSEMBLY

CORRUGATED HEADWALL

REINFORCING RIB

HOLES TO BE

FIELD DRILLED

Corrugated Crown Plate

Note:

1) Reverse crown rib for proper anchor rod attachment plate orientation.

2) No splice plates are used for the reinforcing ribs attached to the corrugated headwall.

3) Reinforcing rib at each end of structure must be oriented such that the headwall can be placed behind them as shown.

HEADWALL BRACING

SUPPLEMENTAL PLATE

9" X 21

2 " CORRUGATED INVERT

ALUMINUM RECEIVING

CHANNEL

CORRUGATED SHELL

GEOTEXTILE Fabric

REINFORCING RIB

SCALLOPED

CLOSURE

PLATE

ALUMINUM TOEWALL

CULVERT SPAN WIDTH = 16' - 6"

ALUMINUM FULL INVERT

FULL INVERT WIDTH

ALUM. SCALLOP PLATE

CULVERT SHELL CROSS

SECTION

4" Bolts @ 191

4" o.c.

9" x 21 2 " Corrugated Invert

24"

4"

58"

Scallop Plate Clips Toewall

BENT TOEWALL

16' - 6"

5' - 11" Approx. Area = 98.3 Sq. Ft.

9" x 21 2" Corrugated Shell

Crown Rib (spacing per manufacturer's recommendations)

Haunch Rib (spacing per manufacturer's recommendations)

Splice (per manufacturer's recommendations)

CROWN RIB

ELBOW CAP

DEADMAN

ANCHORS

HEADWALL

CAP

TRUE CAP LENGTH TO BE

SPECIFIED FOR EACH

WINGWALL

PLAN VIEW AT

TOP OF

HEADWALL

CAP

CORNER PANEL

4'-9" TYP.

WING PANEL

4'-6" TYP.

30Á

ANCHOR RODS

(# AND LOCATION

SPECIFIED BY

MANUFACTURER)

NOTES:

1) Pay item 60202 includes all hardware, bolts, brackets, bracing, rods, deadman anchors, caps, headwalls, corner panels, and wing panels required by the manufacturer for assembly.

2) All panels shall be fabricated from aluminum structural plate as specified in ASTM B 746.

3) Headwalls are for vertical orientation only.

4) If side slope is flatter that 2:1, a double tie-back assembly is required for each deadman.

5) Standard headwalls are shown. HS-25 wheel loads must be kept a minimum distance of 36" from the wall face. Special headwall packages can be fabricated to meet other loading requirements.

6) All headwall panels must be trenched into the existing ground. If a stable rock foundation is encountered, the panels may be trimmed and placed into a cement - grouted keyway.

7) Headwall caps must be field drilled and bolted to the headwall panels.

8) Wingwall angles and slopes shall verified by contractor.

CL OF BOX CULVERT

HEADWALL & WINGWALL DETAILS

STANDARD DETAILS

18' Finished Width

C/L

10' 10'

Sand cover material is incidental to Pay Item 20407

16' Finished Width

C/L

9' 9'

CULVERT DETAIL DRAWINGS