1240LU24Q0043 Attachment 2 - Maps and Plans.pdf

DEPARTMENT OF AGRICULTURE FOREST SERVICE, REGION ONE

CONSTRUCTION PLANS FOR:

ROMBO CAMPGROUND SHORELINE STABILIZATION PROJECT

BITTERROOT NATIONAL FOREST

WEST FORK RANGER DISTRICT

RAVALLI COUNTY, MONTANA

INDEX TO SHEETS

No. DESCRIPTION

0 COVER PAGE

1 EXISTING CONDITIONS & SURVEY CONTROL

2 SITE ACCESS, STAGING, AND WORK ISOLATION PLAN

3 PLAN VIEW AND PROFILE

4 MATERIALS AND QUANTITIES

5 LARGE WOOD STRUCTURE DETAIL

6 VEGETATED WOOD MATRIX DETAILS

7 WILLOW TRENCH DETAIL

8 CROSS SECTIONS

9 BMP DETAILS

100 % DESIGN

GOVERNMENT FURNISHED ITEMS

BORROW SITE

WASTE SITE

LEGAL DESCRIPTION:

NW 1/4 S11, T1S R22W, P.M.,M

RAVALLI COUNTY, MONTANA

VICINITY MAP

SOUTHWESTERN MONTANA

FOREST ENGINEER

REVIEWED:

BITTERROOT NATIONAL FOREST

DATE

WEST FORK DISTRICT RANGER

RECOMMENDED:

BITTERROOT NATIONAL FOREST

FOREST SUPERVISOR

APPROVED:

DATE

DATE

BITTERROOT NATIONAL FOREST

REGION 1

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WYATT

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NATHAN M.

0+00

1+00 2+00 3+00

4+00

5+00

6+00 7+00

8+00

9+00

10+00

11+00

12+00

12+38

EXISTING SITE CONDITIONS

1" = 100'

CONTROL POINTS

POINT NUMBER EASTING NORTHING POINT ELEVATION RAW DESCRIPTION

100 749292.1150' 590088.5520' 4472.348' 5/8" REBAR WITH A 2" ALUMINUM

CAP MARKED "RDG"

101 748993.2320' 589681.2170' 4476.959' 5/8" REBAR WITH A 2" ALUMINUM

CAP MARKED "RDG"

PROJECT DATUM

THE PROJECT COORDINATES ARE BASED ON

THE FOLLOWING:

HORIZONTAL

PROJECTION: MONTANA STATE PLANE

HORIZONTAL

DATUM:

NAD83 (CORS96 2002.00)

UNITS: US SURVEY FEET

VERTICAL

DATUM:

NAVD88 (GEOID 9)

TOPOGRAPHY AND CROSS SECTION

GROUND LINES ARE BASED

ON SURVEY WORK PERFORMED BY RDG IN

OCTOBER 2022. LIDAR DATA WAS

ACQUIRED IN 2019 AND MERGED WITH RDG

GROUND SURVEY.

PLAN VIEW

IMAGE: MAXAR 2022

CONTROL

POINT 100

CONTROL

POINT 101

USDA FO

REST S

ERVICE

TO WEST FORK ROAD (473)

USDA FO

REST S

ERVICE

EXISTING ALIGNMENT

ROMBO CREEK CAMPGROUND ROAD

SITE PHOTO: A

A

B C

SITE PHOTO: B

SITE PHOTO: C

F l o w

CONSTRUCTION EXTENTS

WEST FORK

BITTERROOT RIVER

100 % DESIGN

Sheet: 1 of 9

Drawn By: LS

Designed By: NW

Drawing Checked: NW

Design Checked: MD

ROMBO CAMPGROUND

EXISTING CONDITIONS & SURVEY CONTROL

0+50

1+00

1+50

2+00

2+50 3+00 3+50 4+00 4+50

5+00

5+50

6+00

6+50

7+00

7+50

8+00

8+50

9+00

9+50

10+00

10+50

11+00

11+50

12+00

12+50

12+74

IMAGE: MAXAR 2022

USDA FO

REST S

ERVICE

TO WEST FORK ROAD (473)

USDA FO

REST S

ERVICE

ROMBO CREEK CAMPGROUND ROAD

F l o w

ISOLATED WORK AREA/

CONSTRUCTION EXTENTS

WEST FORK

BITTERROOT RIVER

ACCESS, STAGING AND WORK ISOLATION PLAN VIEW

1" = 100'

DIRECTIONS TO THE SITE: BEGIN AT THE TOWN OF DARBY, MONTANA. TRAVEL SOUTH ON US 93 FOR 4.4 MILES TO THE INTERSECTION OF STATE HIGHWAY 473 (WEST FORK ROAD). TRAVEL SOUTHWEST ON STATE HIGHWAY 473 (WEST FORK ROAD) FOR 17.9 MILES. TURN RIGHT (WEST) ON ROMBO CREEK CAMPGROUND ROAD AND

CONTINUE FOR 0.3 MILES TO THE PROJECT SITE.

TEMPORARY ACCESS ROADS IN THE CAMPGROUND WILL BE CONSTRUCTED TO FACILITATE THE SHORELINE STABILIZATION CONSTRUCTION. ALL TEMPORARY ACCESS ROADS WILL BE RECLAIMED AFTER USE.

ACCESS AND STAGING

NOTES: CONTRACTOR IS RESPONSIBLE FOR MAINTAINING ACCESS

ROADS AND TEMPORARY HAUL ROADS. EQUIPMENT AND

MAINTENANCE AREA TO BE STAGED MINIMUM 150' FROM RIVER.

CONTRACTOR IS RESPONSIBLE FOR RECLAIMING TEMPORARY

ACCESS ROADS PRIOR TO MOBILIZATION AWAY FROM SITE.

PLAN VIEW

LEGEND

SYMBOL

COFFER DAM

BYPASS

TEMPORARY ACCESS ROAD

STAGING AREA

WORK AREA ISOLATION PLAN

FLOW

TEMPORARY COFFER DAM

AND BYPASS CHANNEL

TEMPORARY ACCESS ROADS

TEMPORARY ACCESS ROADS

INSTALL TEMPORARY COFFER DAM AND EXCAVATE A 12 FT BY 2.5 FT BYPASS CHANNEL FROM STATION 5+60

TO STATION 9+40 AS SHOWN (SEE SHEET 9).

DEWATER ISOLATED WORK AREAS WITH A SUMP AND PUMP AS NECESSARY IF GROUND WATER IS PRESENT.

FLOW

FLO

W

RIVER CENTERLINE ALIGNMENT

FLOW

100 % DESIGN

Sheet: 2 of 9

Drawn By: LS

Designed By: NW

Drawing Checked: NW

Design Checked: MD

ROMBO CAMPGROUND

SITE ACCESS, STAGING, AND WORK ISOLATION

FLOW

STAGING AREA

0+20

0+40

0+60 0+80 1+00 1+20 1+40

1+60

1+80

2+00

2+20

2+40

2+60

2+80

3+00

3+20

3+40

3+60

3+80

4+00

4+13

5+00

5+50

6+00

6+50

7+00 7+50

8+00

8+50

9+00

9+50

10+00

-0.65%

4462'

4464'

4466'

4468'

4470'

4472'

4474'

4476'

4462'

4464'

4466'

4468'

4470'

4472'

4474'

4476'

5+

5+

5+

5+

5+

6+

6+

6+

6+

6+

7+

7+

7+

7+

7+

8+

8+

8+

8+

8+

9+

9+

9+

9+

9+

+0

+2

+4

+4

STRUCTURE LAYOUT

1" = 50'

STRUCTURE SCHEDULE

STATION

START

STATION

END BANK STRUCTURE

6+16 6+90 R VWM

6+90 7+20 R LWS

7+20 8+36 R VWM

8+36 8+66 R LWS

8+66 9+16 R VWM

PLAN VIEW

RIVER CENTERLINE ALIGNMENT

STRUCTURE LAYOUT

1" = 50'

PROFILE VIEW

RIGHT BANK FILL EXTENTS

TOP OF BANK PROFILE

EXISTING CHANNEL THALWEG PROFILE

Flow

IMAGE: MAXAR 2022

CONSTRUCTION EXTENTS

Flow

DETAIL LEGEND

SYMBOL DETAIL

SHEET #

LARGE WOOD STRUCTURE 5

VEGETATED WOOD MATRIX 6

WILLOW TRENCH 7

FLOODPLAIN FILL

WEST FORK

BITTERROOT RIVER

ACTIVE CHANNEL

STREAMBANK

ACTIVE CHANNEL

STREAMBANK

CHANNEL TOP OF BANK

ELEVATIONS

STATION

START

ELEVATIONS

(FT)

6+50 4472.5 6+70 4472.4 6+90 4472.3

CHANNEL TOP OF BANK

ELEVATIONS

STATION

START

ELEVATIONS

(FT)

7+10 4472.1 7+30 4472.0 7+50 4471.9

CHANNEL TOP OF BANK

ELEVATIONS

STATION

START

ELEVATIONS

(FT)

7+70 4471.7 7+90 4471.6 8+10 4471.5

CHANNEL TOP OF BANK

ELEVATIONS

STATION

START

ELEVATIONS

(FT)

8+30 4471.4 8+50 4471.2 8+70 4471.1

CHANNEL TOP OF BANK

ELEVATIONS

STATION

START

ELEVATIONS

(FT)

8+90 4471.0 9+10 4470.8 9+30 4470.7

SIDE CHANNEL

100 % DESIGN

Sheet: 3 of 9

Drawn By: LS

Designed By: NW

Drawing Checked: NW

Design Checked: MD

ROMBO CAMPGROUND

PLAN VIEW AND PROFILE

COFFER DAM ALIGNMENT

TEMPORARY COFFER DAM

AND BYPASS CHANNEL

STAGING AREA

TOTAL WOOD QUANTITIES

ITEM QUANTITY DIAMETER LENGTH ROOTWAD

CATEGORY 1 WOOD 30 10-12 IN 20 FT YES

CATEGORY 2 WOOD 740 4-6 IN 20 FT OPTIONAL

CATEGORY 3 WOOD 1,380 1-3 IN 8-10 FT OPTIONAL

WILLOW CUTTINGS 2,200 0.25-1.0 IN 6-8 FT NO

NOTE:

WOOD LENGTHS SHOWN WILL PRODUCE THE PROPER AMOUNT OF MATERIAL FOR

STRUCTURES WHEN SPLIT INTO APPROPRIATE SIZES DURING CONSTRUCTION. IT IS

CONTRACTOR'S RESPONSIBILITY TO CUT WOOD INTO APPROPRIATE SIZE LENGTHS TO FIT

STRUCTURE DIMENSIONS.

TOTAL ROCK QUANTITIES

ITEM QUANTITY (CY) GRADATION

STREAMBANK FILL 55 SIZE (IN) PERCENT

PASSING

12 95 10 80-90 8 60-75 5 45-55 2 30-40 1 20-25

0.08 10-15*

*A MINIMUM OF 10% OF MATERIAL SHALL BE RETAINED ON THE 0.08 INCH SCREEN

AND A MAXIMUM OF 20% OF THE MATERIAL SHALL BE RETAINED ON THE SCREEN.

TOTAL EARTHWORK QUANTITIES

ITEM QUANTITY (CY)

BYPASS CHANNEL* 200

CUT TO SUBGRADE 125

STREAMBANK FILL 55

FLOODPLAIN FILL 150

NET (IMPORTED BACKFILL) 80

*BYPASS CHANNEL VOLUME IS A CUT-FILL BALANCE.

VOLUME SHOWN FOR BIDDING PURPOSES.

NOTE:

ALL VOLUMES ARE NEATLINE, CONTRACTOR TO APPLY

EXPANSION FACTORS TO DETERMINE A MORE ACCURATE

BACKFILL VOLUME.

LARGE WOOD STRUCTURE QUANTITIES

ITEM QUANTITY (EA)

LARGE WOOD STRUCTURES 2

CATEGORY 1 WOOD 30

CATEGORY 2 WOOD 20

CATEGORY 3 WOOD 60

WILLOW CUTTINGS 400

VEGETATED WOOD MATRIX QUANTITIES

ITEM QUANTITY (LF)

VEGETATED WOOD MATRIX 240

CATEGORY 2 WOOD 720

CATEGORY 3 WOOD 1,200

WILLOW CUTTINGS 1,200

WILLOW TRENCH QUANTITIES

ITEM QUANTITY (LF)

WILLOW TRENCH 120

CATEGORY 3 WOOD 120

WILLOW CUTTINGS 600

100 % DESIGN

Sheet: 4 of 9

Drawn By: LS

Designed By: NW

Drawing Checked: NW

Design Checked: MD

MATERIALS AND QUANTITIES

LARGE WOOD STRUCTURE

MATERIAL SCHEDULE (PER STRUCTURE)

ITEM DIA. (IN) LENGTH (FT) ROOTWAD (Y/N) QTY.

STREAMBANK FILL 12" MINUS 15 CY

CATEGORY 1 WOOD 10"-12" 20 YES - 3 FT. DIA. MIN 14-16 EA

CATEGORY 2 WOOD 4"-6" 20 NO 8-10 EA

CATEGORY 3 WOOD 1"-3" 8-10 OPTIONAL 1-2 FT 30 EA

WILLOW CUTTINGS 0.25"-1.0" 6-8 NO 200 EA

EXAMPLE OF A LARGE WOOD STRUCTURE

PLAN VIEW

LARGE WOOD STRUCTURE

0' 2.5' 5'

100 % DESIGN

Sheet: 5 of 9

Drawn By: LS

Designed By: NW

Drawing Checked: NW

Design Checked: MD

ROMBO CAMPGROUND

LARGE WOOD STRUCTURE DETAIL

LARGE WOOD STRUCTURE

FLOODPLAIN

SECTION VIEW

STRUCTURE

DEPTH = 8'-10'

4' - 6' PROJECTION

EXISTING

GROUND

PROPOSED

TOP OF BANK

ROOTWAD LOG

(CATEGORY 1 WOOD)

BRUSH AND LIMBS

(CATEGORY 3 WOOD)

FOOTER LOG

(CATEGORY 2 WOOD)

~2.5'

(REFERENCE VWM)

NTS

SUBGRADE

EXCAVATION

FLOODPLAIN

STREAMBANK FILL

FINISH GRADE

FLOODPLAIN

BASEFLOW WIDTH = +/- 30'

BANKFULL WIDTH = +/- 100'

WILLOW

BUNDLE

CONSTRUCTION NOTES

1. CONSTRUCTION OF LARGE WOOD STRUCTURES WILL OCCUR BEFORE THE VEGETATED WOOD MATRIX BANK TREATMENTS ARE INSTALLED.

2. ANY CHANGES TO THE CONSTRUCTION SEQUENCE MUST BE APPROVED THE C.O.

GENERAL NOTES

1. EXCAVATE TO THE EXCAVATION LIMITS. EXCAVATED MATERIAL SHALL BE STOCKPILED ON THE FLOODPLAIN OUTSIDE OF THE IMMEDIATE WORK AREA.

2. INSTALL FOUR-FOOTER LOGS (CATEGORY 2 WOOD) AT THE BASE OF THE EXCAVATED TRENCH AT THE ORIENTATIONS NOTED IN PLAN VIEW. FOOTER LOGS SHALL PROJECT NO GREATER THAN 1 FT. BEYOND THE FINISH GRADE BANK LINE. EXPOSED ENDS OF FOOTER LOGS SHALL BE BROKEN/ROUGHENED SO AS TO APPEAR

NATURAL. SAWED ENDS OF FOOTER LOGS SHALL NOT BE EXPOSED.

3. INSTALL EIGHT ROOTWAD LOGS (CATEGORY 1 WOOD) INTERSECTING BOTH FOOTER LOGS AT THE ORIENTATION NOTED IN PLAN VIEW. THE UPSTREAM ROOTWAD SHALL NOT PROJECT INTO THE CHANNEL AND SHALL BE FLUSH WITH THE FINISHED BANK LINE. THE DOWNSTREAM ROOTWAD SHALL PROJECT NO GREATER THAN 4-6 FT.

BEYOND THE FINISHED BANK LINE.

4. BACKFILL TRENCH WITH STOCKPILED MATERIAL UP TO THE TOP OF THE FOOTER LOGS (CATEGORY 2 WOOD). BACKFILL SHALL BE BUCKET COMPACTED.

5. INSTALL A SECOND TIER OF FOUR-FOOTER LOG (CATEGORY 2 WOOD) FOOTER LOGS SHALL PROJECT NO GREATER THAN 1 FT. BEYOND THE FINISH GRADE BANK LINE.

EXPOSED ENDS OF FOOTER LOGS SHALL BE BROKEN/ROUGHENED SO AS TO APPEAR NATURAL. SAWED ENDS OF FOOTER LOGS SHALL NOT BE EXPOSED.

6. INSTALL SMALL WOOD AND BRUSH (CATEGORY 3 WOOD) AT APPROXIMATE 45° ANGLE TO ROOTWAD STEMS. BRUSH AND LIMBS SHALL PROJECT NO GREATER THAN 3

FT. BEYOND THE FINISHED BANK LINE.

7. INSTALL SIX TO SEVEN ROOTWAD LOGS (CATEGORY 1 WOOD) INTERSECTING THE LOWER TIER OF ROOTWADS AT THE ORIENTATION NOTED IN PLAN VIEW. THE

ROOTWADS SHALL PROJECT NO GREATER THAN 2 FT. BEYOND THE FINISHED BANK LINE.

8. INSTALL SMALL WOOD AND BRUSH (CATEGORY 3 WOOD) AND WILLOW CUTTINGS INTERWOVEN INTO WOOD MATRIX UP TO FINISHED GRADE. BRUSH, LIMBS, AND WILLOW CUTTINGS SHALL PROJECT NO GREATER THAN 4 FT. BEYOND THE FINISHED BANK LINE.

9. BACKFILL WOOD MATRIX WITH STREAMBED FILL UP TO FINISHED GRADE WITH STOCKPILED NATIVE MATERIAL. NO AREAS BEHIND THE FINISHED BANKLINE ARE TO BE

LEFT BELOW THE FINISHED GRADE.

10. INSTALL DEFLECTOR LOGS (CATEGORY 2 WOOD) AT APPROXIMATE 45° ANGLE TO ROOTWAD STEMS. DEFLECTOR LOGS SHALL BE HALF EMBEDDED IN THE FLOODPLAIN AND PROJECT NO GREATER THAN 4 FT. BEYOND THE FINISHED BANK LINE. EXPOSED ENDS OF FOOTER LOGS SHALL BE BROKEN/ROUGHENED SO AS TO APPEAR

NATURAL. SAWED ENDS OF FOOTER LOGS SHALL NOT BE EXPOSED.

STREAMBANK FILL

GRADATION

SIZE (IN) PERCENT

PASSING

12 95 10 80-90 8 60-75 5 45-55 2 30-40 1 20-25

0.08 10-15

EXCAVATION

LENGTH = 35'

WILLOW BUNDLE

EXCAVATION LIMITS

MINIMUM ROOTWAD

DIAMETER = 3'

ROOTWAD LOG

(CATEGORY 1 WOOD)

BRUSH AND LIMBS

(CATEGORY 3 WOOD)

FOOTER LOG

(CATEGORY 2 WOOD)

FINISHED GRADE BANKLINE

BANK KEY-IN

DISTANCE = 10-15'

MAXIMUM STRUCTURE

PROJECTION = 4' - 6'

AVERAGE STRUCTURE

LENGTH = +/-30'

F

LO

W

NOTES ON VEGETATED WOOD MATRIX INSTALLATION

1. CONSTRUCTION OF THE VEGETATED WOOD MATRIX WILL OCCUR AFTER THE

CHANNEL STREAMBED IS CONSTRUCTED AND IN CONJUNCTION WITH LWS.

2. IF VEGETATED WOOD MATRIX STRUCTURES ARE INSTALLED PRIOR TO OCTOBER

1, LEAVE BACK TRENCH UNFILLED AND COMPLETE STRUCTURE WHEN

DORMANT WILLOWS ARE AVAILABLE.

3. IT IS CONTRACTOR'S RESPONSIBILITY TO CUT WOOD INTO APPROPRIATE SIZE

LENGTHS TO FIT STRUCTURE DIMENSIONS.

GENERAL NOTES

1. EXCAVATE TO THE EXCAVATION LIMITS AS SHOWN. EXCAVATED MATERIAL

SHALL BE STOCKPILED OUTSIDE OF THE IMMEDIATE WORK AREA.

2. PREPARE THE BENCH OF THE STRUCTURE BY PLACING CHANNEL

STREAMBANK FILL ALLUVIUM FROM THE BASE OF THE EXCAVATION

DEPTH/BOTTOM OF EXCAVATION TO WITHIN 1.0 FT. MIN. THICKNESS.

3. CATEGORY 2 AND CATEGORY 3 WOOD, AND CHANNEL STREAMBANK

ALLUVIUM SHALL BE PLACED IN ALTERNATING LAYERS AND BUCKET

COMPACTED UP TO THE TOP OF BANK ELEVATION AS SHOWN BELOW IN THE

INSTALLATION SEQUENCE. PLACE SIX (6) FT TO EIGHT (8) FT. DORMANT

WILLOW CUTTINGS AT A DENSITY OF 5 PER LINEAR FT ALONG THE TOP OF

BANK LINE ELEVATION. WILLOW CUTTINGS SHALL SLOPE AT AN

APPROXIMATE 1:1 SLOPE AS SHOWN IN SECTION VIEW. STEMS MAY

OVERLAP. THE CUT ENDS SHALL BE PLACED AT THE BASE OF THE SLOPES

WITH THE UN-CUT ENDS EXTENDING BEYOND THE EDGE OF THE TRENCH SO

NO GREATER THAN ONE-THIRD OF THE TOTAL CUTTING LENGTH IS EXPOSED

BEYOND THE TOP OF BANK EDGE. WILLOW CUTTINGS SHOULD INTERCEPT THE

DESIGN TOP OF BANK LINE AS SHOWN IN STEP 5 OF THE INSTALLATION

SEQUENCE.

4. THE UPSTREAM AND DOWNSTREAM ENDS OF THE STRUCTURE SHALL

TRANSITION SMOOTHLY INTO ADJACENT STREAMBANK STRUCTURES TO

MINIMIZE EROSION, FLANKING, AND BANK FAILURE. STRUCTURE ENDS MAY

BE STABILIZED WITH ADDITIONAL CATEGORY 1 ROCK AS APPROVED BY C.O.

5. AFTER INSTALLATION OF THE VEGETATED WOOD MATRIX, BACKFILL THE

STRUCTURE WITH STOCKPILED MATERIAL TO FINISHED GRADE, AND BUCKET

COMPACT. NO AREAS BEHIND THE FINISHED BANKLINE ARE TO BE LEFT

BELOW FINISHED GRADE.

1" = 5'

STEP 1

PREPARE BENCH AT

CHANNEL BED ELEVATION

2:1

WILLOW TRENCH

(SEE SHEET 7)

1" = 3'

RECOMMENDED VEGETATED WOOD

MATRIX INSTALLATION SEQUENCE

SECTION VIEW

VEGETATED WOOD MATRIX

PLAN VIEW

STEP 2

PLACE CATEGORY 2 WOOD AT BED

ELEVATION AND BACKFILL

WITH ALLUVIUM

STEP 3

PLACE A LAYER OF CATEGORY 3

WOOD, BACKFILL WITH ALLUVIUM,

AND PRESS WITH BUCKET

STEP 4

PLACE A WINDROW OF ALLUVIUM

AND PRESS WITH BUCKET TO FORM

A POINT AT THE TOP OF BANK LINE

STEP 5

INSTALL WILLOWS AT TOP OF

BANK LINE AND BACKFILL WITH

NATIVE MATERIAL

VEGETATED WOOD MATRIX

MATERIAL SCHEDULE (PER

LINEAR FOOT)

ITEM DIA. (IN) QTY.

CATEGORY 2 WOOD 4"-6" 3

CATEGORY 3 WOOD 1"-3" 5

WILLOW CUTTINGS 0.25"-1.0" 5

STREAMBANK FILL 12" MINUS 0.1 CY

1" = 3'

1:1

WILLOW TRENCH

(SEE SHEET 7)

BACKFILL

STREAMBANK FILL

CATEGORY 3 WOOD

6' - 10'2' MAX PROTRUSION

4' - 8'

STREAMBED

WILLOW CUTTINGS

VEGETATED WOOD MATRIX

SECTION VIEW

BANKFULL

WATER SURFACE

BASEFLOW

WATER SURFACE

FI

N

IS

H

ED

T

O P

O F

BA

N

KL

IN

E

FINISHED GRADE

2:1

CATEGORY 2 WOOD

STREAMBANK FILL

GRADATION

SIZE (IN) PERCENT

PASSING

12 95 10 80-90 8 60-75 5 45-55 2 30-40 1 20-25

0.08 10-15

100 % DESIGN

Sheet: 6 of 9

Drawn By: LS

Designed By: NW

Drawing Checked: NW

Design Checked: MD

ROMBO CAMPGROUND

VEGETATED WOOD MATRIX DETAIL

DESIGN

CHANNEL

STREAMBANK

20°- 40°

INSTALL CATEGORY 2

WOOD AT VARYING

ANGLES FROM BANKLINE

EXAMPLE OF A CONSTRUCTED WILLOW TRENCH

1. WILLOW TRENCHES WILL BE CONSTRUCTED TO INCREASE FLOODPLAIN CONNECTIVITY, DISPERSE SURFACE FLOWS AND PROMOTE REVEGETATION.

CONSTRUCTION OF WILLOW TRENCHES WILL OCCUR AFTER WILLOWS HAVE ACHIEVED DORMANCY, TYPICALLY AFTER OCTOBER 15TH.

2. CONTRACTOR SHALL MARK AND C.O. SHALL APPROVE THE GENERAL CONSTRUCTION LOCATION FOR EACH WILLOW TRENCH PRIOR TO CONSTRUCTION.

WILLOW CUTTINGS

TRENCH EXCAVATED AND

BACKFILLED WITH

MATERIAL REMOVED TO

CREATE TRENCH

WILLOW CUTTINGS

TRENCH EXCAVATED AND

BACKFILLED WITH

MATERIAL REMOVED TO

CREATE TRENCH

FLOODPLAIN BACKFILL

OR EXISTING GROUND

FLOODPLAIN BACKFILL

OR EXISTING GROUND WILLOW TRENCHES

CONSTRUCTED AS LINEAR

FEATURES THAT MAY BE

CURVED OR STRAIGHT

FLOODPLAIN BACKFILL

APPROX. 5'

APPROX. 5'

FINISHED FLOODPLAIN SURFACE

GENERAL NOTES

EXTENDS LATERALLY THE

LENGTH OF THE STAKED

TREATMENT LOCATION

EXTENDS LATERALLY THE

LENGTH OF THE STAKED

TREATMENT LOCATION

1. WILLOW TRENCHES WILL BE CONSTRUCTED WITHIN THE FLOODPLAIN AT THE DIRECTION OF THE CO.

2. A TRENCH WILL BE CONSTRUCTED APPROXIMATELY 5' DEEP AND EXTEND THE LENGTH OF THE STAKED TREATMENT LOCATION. LIVE WILLOW CUTTINGS AND CATEGORY 3 WOOD WILL BE PLACED IN THE TRENCH SUCH THAT THEY ARE INTERMIXED AND ORIENTED AT A NEAR VERTICAL ANGLE.

3. THE TRENCH WILL THEN BE BACKFILLED WITH THE SAME MATERIAL REMOVED TO CREATE THE TRENCH AND SHOULD MATCH THE ELEVATION OF THE

SURROUNDING FLOODPLAIN GRADE.

NOTES ON WILLOW TRENCH INSTALLATION

EXAMPLE OF A WILOW TRENCH INSTALLATION

FINISHED FLOODPLAIN SURFACE

WILLOW TRENCH

SECTION VIEW

NTS

WILLOW TRENCH

PROFILE VIEW

NTS

VEGETATED BRUSH TRENCH

PLAN VIEW

NTS

WILLOW TRENCH MATERIAL SCHEDULE

(PER LINEAR FOOT)

ITEM DIA. (IN) QTY.

WILLOW CUTTINGS 0.25"-1.0" 5

CATEGORY 3 WOOD 1"-3" 1

100 % DESIGN

Sheet: 7 of 9

Drawn By: LS

Designed By: NW

Drawing Checked: NW

Design Checked: MD

WILLOW TRENCH DETAIL

EL

EV

AT

IO

N

ALIGNMENT OFFSET STATIONING

STATION 6+90

4466'

4468'

4470'

4472'

4474'

4476'

4466'

4468'

4470'

4472'

4474'

4476'

EL

EV

AT

IO

N

ALIGNMENT OFFSET STATIONING

STATION 7+10

4466'

4468'

4470'

4472'

4474'

4476'

4478'

4466'

4468'

4470'

4472'

4474'

4476'

4478'

EL

EV

AT

IO

N

ALIGNMENT OFFSET STATIONING

STATION 6+70

4468'

4470'

4472'

4474'

4476'

4478'

4468'

4470'

4472'

4474'

4476'

4478'

EL

EV

AT

IO

N

ALIGNMENT OFFSET STATIONING

STATION 7+30

4466'

4468'

4470'

4472'

4474'

4476'

4478'

4466'

4468'

4470'

4472'

4474'

4476'

4478'

EL

EV

AT

IO

N

ALIGNMENT OFFSET STATIONING

STATION 7+50

4466'

4468'

4470'

4472'

4474'

4476'

4478'

4466'

4468'

4470'

4472'

4474'

4476'

4478'

EL

EV

AT

IO

N

ALIGNMENT OFFSET STATIONING

STATION 7+70

4464'

4466'

4468'

4470'

4472'

4474'

4476'

4478'

4464'

4466'

4468'

4470'

4472'

4474'

4476'

4478'

EL

EV

AT

IO

N

ALIGNMENT OFFSET STATIONING

STATION 7+90

4464'

4466'

4468'

4470'

4472'

4474'

4476'

4478'

4464'

4466'

4468'

4470'

4472'

4474'

4476'

4478'

EL

EV

AT

IO

N

ALIGNMENT OFFSET STATIONING

STATION 8+10

4466'

4468'

4470'

4472'

4474'

4476'

4478'

4466'

4468'

4470'

4472'

4474'

4476'

4478'

EL

EV

AT

IO

N

ALIGNMENT OFFSET STATIONING

STATION 8+30

4466'

4468'

4470'

4472'

4474'

4476'

4478'

4466'

4468'

4470'

4472'

4474'

4476'

4478'

EL

EV

AT

IO

N

ALIGNMENT OFFSET STATIONING

STATION 8+50

4466'

4468'

4470'

4472'

4474'

4476'

4478'

4466'

4468'

4470'

4472'

4474'

4476'

4478'

EL

EV

AT

IO

N

ALIGNMENT OFFSET STATIONING

STATION 8+70

4466'

4468'

4470'

4472'

4474'

4476'

4478'

4466'

4468'

4470'

4472'

4474'

4476'

4478'

LEGEND

EXISTING GRADE

SUBGRADE

FINISHED GRADE

FILL

100 % DESIGN

Sheet: 8 of 9

Drawn By: LS

Designed By: NW

Drawing Checked: NW

Design Checked: MD

CROSS SECTIONS

© 2023 Microsoft Corporation © 2023 Maxar ©CNES (2023) Distribution Airbus DS

0+20

0+40

0+60 0+80 1+00 1+20 1+40

1+60

1+80

2+00

2+20

2+40

2+60

2+80

3+00

3+20

3+40

3+60

3+80

4+00

4+13

6+00

6+50

7+00 7+50

8+00

8+50

9+00

STATION

4467' 4468' 4469' 4470' 4471' 4472' 4473' 4474'

4467' 4468' 4469' 4470' 4471' 4472' 4473' 4474'

0+

0+

0+

0+

0+

1+

1+

1+

1+

1+

2+

2+

2+

2+

2+

3+

3+

3+

3+

3+

4+

4+

-0.86%

TEMPORARY COFFER DAM WITH BYPASS CHANNEL

PLAN VIEW

LINE COFFER DAM WITH

POLYETHYLENE SHEETING

TO PREVENT SEEPING

CONSTRUCT COFFER

DAM WITH EXCAVATED

CHANNEL MATERIAL

CLEARWATER BYPASS

CHANNEL

12" MIN. BURY

EXCAVATE A 2.5 FT X 12 FT

TEMPORARY BYPASS CHANNNEL

EXAMPLE OF AN ISOLATED STREAMBANK

100 % DESIGN

Sheet: 9 of 9

Drawn By: LS

Designed By: NW

Drawing Checked: NW

Design Checked: MD

ROMBO CAMPGROUND

BMP DETAILS

NOTES: CONTRACTOR SHALL CONSTRUCT

A MINIMUM 2.5 FT DEEP BY 12 FT WIDE

BYPASS CHANNEL TO CONVEY THE

APPROXIMATE BASE FLOW OF 70 CFS.

ADDITIONAL BMP'S SHALL BE INSTALLED

AT THE DIRECTION OF THE C.O.

RIVER CENTERLINE ALIGNMENT

FLOW

TEMPORARY COFFER DAM AND

BYPASS CHANNEL ALIGNMENT

TEMPORARY COFFER DAM

AND BYPASS CHANNELFLOW

FLOW

TOP OF COFFER DAM

BYPASS CHANNEL THALWEG

EXISTING GROUND

EXTENTS OF COFFER DAM AND

BYPASS CHANNEL GRADING

TEMPORARY COFFER DAM WITH BYPASS CHANNEL

PROFILE VIEW

TEMPORARY COFFER DAM WITH BYPASS CHANNEL

SECTION VIEW

1" = 40'

1" = 40'

NTS

EARTHWORK

EXCAVATION OF BYPASS CHANNEL

AND CONSTRUCTION OF COFFER DAM

WILL RESULT IN APPROXIMATELY

200 CY OF CUT AND PLACEMENT.