Log_012910.pdf

DESCRIPTION OF WORK:

NAME TRAIL#-MP WORK

MOFFETT 430-2.2 REMOVE EXISTING TWO LOG BRIDGE. CONSTRUCT SINGLE LOG BRIDGE WITH ONE NATIVE RAIL.

JACKPOT 492-1.0 REMOVE EXISTING SINGLE LOG BRIDGE. CONSTRUCT SINGLE LOG BRIDGE WITH TWO NATIVE RAILS.

LINNEY 499-0.4 CONSTRUCT SINGLE LOG BRIDGE WITH TWO NATIVE RAILS.

OAK GROVE 528-7.6 REMOVE EXISTING TWO LOG BRIDGE. CONSTRUCT SINGLE LOG BRIDGE WITH TWO NATIVE RAILS.

BATH HOUSE 544-1.4 REMOVE EXISTING TWO LOG BRIDGE. CONSTRUCT TWO LOG BRIDGE WITH TWO NATIVE RAILS.

UNDERHILL #1 683-0.25 REMOVE EXISTING TWO LOG BRIDGE. CONSTRUCT SINGLE LOG BRIDGE WITH TWO NATIVE RAILS.

UNDERHILL #2 683A-0.01 REMOVE EXISTING TWO LOG BRIDGE. CONSTRUCT SINGLE LOG BRIDGE WITH TWO NATIVE RAILS.

INDIAN HENRY 699-0.1 REMOVE EXISTING SINGLE LOG BRIDGE. CONSTRUCT SINGLE LOG BRIDGE WITH TWO LUMBER RAILS.

TAG 723-1.8 REMOVE EXISTING TWO LOG BRIDGE. CONSTRUCT SINGLE LOG BRIDGE WITH TWO NATIVE RAILS.

BIGHORN 742-1.2 REMOVE EXISTING SINGLE LOG BRIDGE. CONSTRUCT SINGLE LOG BRIDGE WITH TWO NATIVE RAILS.

ROLLING RIFFLE 742-1.78 REMOVE EXISTING SINGLE LOG BRIDGE. CONSTRUCT SINGLE LOG BRIDGE WITH TWO NATIVE RAILS.

NEW BRIDGE DETAILS: SEE TYPICAL PROFILE

NAME SA

(FT.)

ABUT.

A

SB

(FT.)

ABUT.

B

H

(FT.)

W

(IN)

RAIL(S) RAIL

TYPE

STRINGERS ES

(FT.)

ELEV.

(FT)

DESIGN

LOAD(PSF)

D(IN.)

(MIN. GRP 2)

MOFFETT 0 STEP 2 STEP 3 12 1 NATIVE 1 16 3400 220 18

JACKPOT 2 STEP 2 STEP 6.5 24 2 NATIVE 1 43 3080 185 26

LINNEY 0 STEP 0 STEP * 24 2 NATIVE 1 58 2600 150 30

OAK GROVE 5 BULKHEAD 4 BULKHEAD 6 24 2 NATIVE 1 65 3250 200 30 (GRP 1)

BATH HOUSE 2 BULKHEAD 1 BULKHEAD 3.5 48 2 NATIVE 2 35 2250 160 21

UNDERHILL #1 4 BULKHEAD 1 STEP 4 24 2 NATIVE 1 26 3250 125 18

UNDERHILL #2 4 STEP 4 STEP 3 24 2 NATIVE 1 23 3250 125 18

INDIAN HENRY 0 STEP 0 STEP 5 24 2 LUMBER 1 38 1250 85 20

TAG 7 STEP 2.5 STEP 6 24 2 NATIVE 1 39 1500 85 20

BIGHORN 3 STEP 0 BULKHEAD 8 24 2 NATIVE 1 42 1650 85 21

ROLLING RIFFLE 0 STEP 2 BULKHEAD 5 24 2 NATIVE 1 33 1750 85 18

*SEE BRIDGE SITE NOTES

BRIDGE SITE NOTES:

MOFFETT: ACCESS TO MOFFETT WILL REQUIRE ENTRY INTO BULL RUN WATERSHED BY SPECIAL ARRANGEMENT

JACKPOT: ABUTMENT A&B: REMOVE OLD SILLS AND REBUILD PROTECTION WITH RIVER ROCK.

LINNEY: ABUTMENT A: ON ROCK SHELF. ABUTMENT B: CONSTRUCT MASONRY SILL APPROXIMATELY FOUR FEET HIGH.

(H)-BOTTOM OF STRINGER SHALL BE AT OR ABOVE EXISTING ABUTMENT B SILL ELEVATION.

BATH HOUSE: ABUTMENT A: PUSH ONE LARGE ROCK AGAINST BACK FOR PROTECTION. BRIDGE GRADE APPROXIMATELY 1%.

INDIAN HENRY: USE EXISTING CONCRETE SILLS.

TAG: ABUTMENT A&B: LEAVE OLD SILL IN PLACE FOR BANK PROTECTION. BRIDGE GRADE APPROXIMATELY 2%.

GENERAL CONSTRUCTION NOTES:

DISPOSAL: EXISTING BRIDGE DISPOSAL SHALL BE ON THE FLOODPLAIN DOWNSTREAM OF THE BRIDGE OR AS DIRECTED BY CO.

ALL TREATED WOOD MATERIAL SHALL BE REMOVED FROM NATIONAL FOREST LAND.

ABUTMENTS: CEDAR SILLS SHALL BE CUT FROM DOWNED LOGS OUTSIDE OF RIPARIAN AREAS OR BROUGHT IN FROM OFF FOREST.

SILL MATERIAL SHALL BE APPROVED BY CO BEFORE CUTTING.

SPAN: ESTIMATED SPAN LENGTHS LISTED ARE +-2 FEET AND DO NOT INCLUDE DISTANCE FROM CENTER LINE OF ABUTMENT TO END OF LOG.

SPAN LENGTHS OUTSIDE OF THIS TOLERANCE WILL REQUIRE PRE-APPROVAL BY CO.

BRIDGES SHALL BE CONSTRUCTED AT 0% GRADE UNLESS NOTED BELOW.

STRINGERS: ESTIMATED MID-SPAN DIAMETER IS MEASURED INSIDE BARK. ALL LOGS WILL BE PEELED BEFORE MOVING TO BRIDGE SITE.

PRIORITY FOR STRINGER SPECIES WILL BE 1) DOUGLAS FIR, 2) WESTERN RED CEDAR, 3) WESTERN LARCH.

CANDIDATE STRINGERS HAVE BEEN IDENTIFIED, WILL BE MARKED, AND ARE WITHIN 500 FEET OF EACH SITE.

STRINGERS SHALL BE APPROVED BY CO BEFORE CUTTING.

NATIVE RAIL: NATIVE RAIL MATERIAL IS ESTIMATED TO BE AVAILABLE WITHIN 1 MILE OF EACH BRIDGE SITE.

NATIVE RAIL MATERIAL SHALL BE APPROVED BY CO BEFORE CUTTING.