12455020R0003 Attachment 4 Plans Drawings Maps.pdf

PROJECT DIRECTORY

OWNER US FOREST SERVICE

US Forest Service

Brady Dodd, Hydrologist

160 Zillicoa St., Asheville NC 28801 bdodd@fs.fed.us

ENGINEER JENNINGS ENVIRONMENTAL

Greg Jennings, PhD, PE

President

919.600.4790 greg@jenningsenv.com

SHEET INDEX

COVER SHEET 1.0

PROPOSED PLAN AND PROFILE 2.1

PROPOSED GRADING SECTIONS 2.2

PROPOSED CHANNEL CROSS-SECTIONS 2.3

DETAILS 2.4 - 2.8

SHULER CREEK FISH PASSAGE ENHANCEMENT

CHEROKEE COUNTY, NORTH CAROLINA

PRELIMINARY

DESIGN 05.13.2019

1.1

AS NOTED

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PRELIMINARY

DESIGN

REVISIONS:

DATE: 05/13/2019

PLOT SIZE: 24" x 36"

H.D.: NAD83 (NCSP)

V.D.: NAVD88

JE PID: 5201

PRELIM: 04/30/2019

0+00 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+25

BK

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1.1%

2.1

SCALE: 1" = 30'

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VERTICAL EXAGGERATION = 10:1

SCALE: 1" = 30'

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PRELIMINARY

DESIGN

REVISIONS:

DATE: 05/13/2019

PLOT SIZE: 24" x 36"

H.D.: NAD83 (NCSP)

V.D.: NAVD88

JE PID: 5201

PRELIM: 04/30/2019

Feet 0 30 60

BEGIN PROJECT WITH OFFSET

BOULDER RIFFLE APPROXIMATELY 30'

DOWNSTREAM OF EXISTING LOG CRIB

AND REBAR DAM

EXISTING RUN OF RIVER LOW HEAD DAM

CONSTRUCT OF LOG CRIBBING AND

REBAR. REMOVE STRUCTURE AFTER

CONSTRUCTION OF PROPOSED FISH

PASSAGE ENHANCEMENT PROJECT.

GRADING LIMITS

GRADING LIMITS

BOULDER RIFFLE WITH

LOGS PER DETAIL

LOG VANE WITH

BOULDER J-HOOK

BOULDER RIFFLE

PER DETAIL

BOULDER J-HOOK VANE

PER DETAIL

TOE WOOD REVETMENT

PER DETAIL

BOULDER RIFFLE WITH

LOGS PER DETAIL

LOG VANE WITH

BOULDER J-HOOK

EXISTING TOP OF DAM

ELV = 1172.3'

BORROW AREA FOR

CHANNEL FILL MATERIAL,

BRUSH AND LOGS

STA 3+87

0 20 40 60 80 100 120 1400-20-40-60-80-100-120-140

STA 5+63

0 20 40 60 80 100 120 1400-20-40-60-80-100-120-140

STA 2+12

0 20 40 60 80 100 120 1400-20-40-60-80-100-120-140

STA 0+41

0 20 40 60 80 100 120 1400-20-40-60-80-100-120-140

2.2

SCALE: 1" = 10'

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PRELIMINARY

DESIGN

REVISIONS:

DATE: 05/13/2019

PLOT SIZE: 24" x 36"

H.D.: NAD83 (NCSP)

V.D.: NAVD88

RIFFLE CROSS-SECTIONS

NOT TO SCALESHULER CREEK

POOL CROSS-SECTIONS

NOT TO SCALESHULER CREEK

PROPOSED 700 GRAM COIR

EROSION CONTROL MATTING

SEE DETAIL

BANKFULL BENCH

WIDTH VARIES PER PLAN BKF WSE

WBKF

DMAX

FLOODPLAIN WIDTH VARIES PER PLAN

PROPOSED CENTERLINE ALIGNMENT

PROPOSED GRADE

BKF WSE

WPOOL

WIDTH VARIES PER PLAN

PROPOSED CENTER LINE ALIGNMENT

DMPOOL

POINT BAR

H : V

1.5 : 11.5 : 1

H : V H : V

TIE TO EXISTING

PER GRADING PLAN

1.5 : 11.5 : 1

PROPOSED 700 GRAM COIR

EROSION CONTROL MATTING

SEE DETAIL

RIFFLE CROSS-SECTION SUMMARY

PARAMETER DESIGN

ABKF (FT

2. 125

WBKF (FT) 44.7

DBKF (FT) 2.8

DMAX (FT) 3.7

W/D (FT) 16.0

DMAX/DBKF 1.3

S o

(FT/FT) 0.011

POOL CROSS-SECTION SUMMARY

PARAMETER DESIGN

APOOL 293

WPOOL 53.7

DPOOL 5.5

DMPOOL 9.8

APOOL/ABKF 2.2

WPOOL/WBKF 1.3

DMPOOL/DBKF 3.5

MAX DEPTH AT CENTER OF

RIFFLE CROSS-SECTION

BANKFULL BENCH

WIDTH VARIES PER PLAN

BANKFULL BENCH

WIDTH VARIES PER PLAN

TIE TO EXISTING

PER GRADING PLAN

2.3

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PRELIMINARY

DESIGN

REVISIONS:

DATE: 05/13/2019

PLOT SIZE: 24" x 36"

H.D.: NAD83 (NCSP)

V.D.: NAVD88

NOT TO SCALE

EROSION CONTROL MATTING

DETAILED PLAN

NOT TO SCALE

A'A

DETAILED CROSS-SECTION A - A'

NOT TO SCALE

NOTES

DETAILED CROSS-SECTION B - B'

B

BANKFULL

CONSTRUCTED BOULDER RIFFLE

1. ALL BOULDERS USED FOR THE PROPOSED STRUCTURE SHALL BE STRUCTURAL STONE, CUBICAL OR RECTANGULAR IN SHAPE. THE ENGINEER MUST APPROVE THE USE OF BOULDERS THAT MAY BE AVAILABLE

ONSITE. BOULDERS DIMENSIONS SHALL BE 2.5 FT X 4.0 FT X 1.5 FT +/- 0.5 FT.

2. DIMENSIONS AND SLOPES OF STRUCTURES DESCRIBED IN THE DETAIL MAY BE ADJUSTED BY DESIGN

ENGINEER TO FIT CONDITIONS ONSITE.

3. CONTRACTOR WILL BE REQUIRED TO FIT BOULDERS TOGETHER TIGHTLY. GAPS BETWEEN BOULDERS SHALL BE MINIMIZED BY FITTING BOULDERS TOGETHER AND PLUGGING WITH NC DOT CLASS A ROCK OR CHINKING

STONE APPROVED BY ENGINEER.

4. HEADER BOULDERS SHALL BE UNDERLAIN BY FOOTER BOULDERS TO PROVIDE A FOUNDATION UNLESS OTHERWISE DIRECTED BY THE ENGINEER. HEADER BOULDERS SHALL BE OFFSET 1 FT UPSTREAM OF THE

FOOTER BOULDERS WHERE MICROPOOLS ARE ANTICIPATED TO FORM AS SHOWN IN THE DETAIL.

5. SET BOULDER INVERTS AT ELEVATION SHOWN ON THE PLAN AND PROFILE SHEETS. NO ELEVATIONS OF THE

BOULDERS MAY VARY FROM THE PLAN SHEETS WITHOUT DIRECTION FROM THE ENGINEER.

6. THE BOULDER ARM SHALL EXTEND UP TO THE STREAMBANK AT A 1% SLOPE AND INTO THE STREAMBANK A

MINIMUM OF 6.0' OR TWO FULL BOULDER LENGTHS.

7. MAXIMUM ELEVATION DROP OVER EACH BOULDER IS STEP IS 0.3' - 0.5'.

8. ON THE UPSTREAM SIDE OF THE BOULDERS, NON-WOVEN GEOTEXTILE FABRIC SHALL BE PLACED ON THE ENTIRE LENGTH OF THE STRUCTURE. FILTER FABRIC SHALL EXTEND FROM THE BOTTOM OF THE FOOTER BOULDER TO THE FINISHED GRADE ELEVATION AND SHALL BE PLACED THE ENTIRE LENGTH OF THE STRUCTURE. RIFFLE MATERIAL SHALL BE USED AS BACKFILL MATERIAL AROUND THE OFFSET BOULDER STEPS

AND MICROPOOLS SHALL BE ESTABLISHED BELOW EACH STEP.

9. CONSTRUCTED RIFFLE MATERIAL SHALL EXTEND A MINIMUM OF 6.0 FT U/S OF THE P.T. INTO THE GLIDE AND A

MINIMUM OF 6.0 FT D/S OF THE P.C. INTO THE RUN.

10. RIFFLE MATERIAL SHALL BE PLACED AT A UNIFORM THICKNESS SUCH THAT, IN CROSS-SECTION, ITS LOWEST ELEVATION OCCURS IN THE CENTER OF THE CHANNEL. RIFFLE MATERIAL SHALL BE COMPACTED USING AN EXCAVATOR BUCKET SUCH THAT FUTURE SETTLEMENT OF THE MATERIAL IS KEPT TO A MINIMUM.

11. THE SURFACE OF THIS STRUCTURE SHALL BE FINISHED TO A SMOOTH AND COMPACT SURFACE IN ACCORDANCE WITH THE LINES, GRADES, AND CROSS-SECTIONS OR ELEVATIONS SHOWN ON THE DRAWINGS.

THE DEGREE OF FINISH FOR INVERT ELEVATIONS SHALL BE WITHIN 0.1 FT OF THE GRADES AND ELEVATIONS

INDICATED.

12. RE-DRESSING OF CHANNEL AND BANKFULL BENCH/FLOODPLAIN WILL LIKELY BE REQUIRED FOLLOWING INSTALLATION OF IN-STREAM STRUCTURES AND SHALL BE CONSIDERED INCIDENTAL TO CONSTRUCTION.

13. SEE TYPICAL RIFFLE CROSS SECTION FOR DIMENSIONS.

STREAMBED

GLIDE

RUN

B'

RIFFLE WITH BOULDERS SLOPE VARIES PER PROFILE

BOULDER STEP

MICROPOOL

BELOW STEP

CONSTRUCTED BOULDER RIFFLE CONSTRUCTED BOULDER RIFFLE

CONSTRUCTED BOULDER RIFFLE

BOULDER STEP

ELV = 0.2' - 0.4'

EXTEND BOULDER SILL INTO

STREAMBANK MIN 6.0' OR

TWO FULL BOULDER LENGTHS

RIFFLE SUBSTRATE

DEPTH MIN. = 2.5'

30 - 40o

RIFFLE SUBSTRATE

10% NCDOT CLASS A

20% NCDOT CLASS B

70% NCDOT CLASS 1 RIFFLE SUBSTRATE

DEPTH PER 2.5'

BOULDER SILL

EXTEND INTO STREAMBANK MIN 6.0' OR

TWO FULL BOULDER LENGTHS

NON-WOVEN

GEOTEXTILE

OFFSET HEADER

BOULDERS 1.0' U/S

BANKFULL

BOULDER STEP

FLOW

TOE OF CHANNEL

SLOPE

FLOWFLOW

MOST DOWN STREAM STRUCTURE AT

PC MAY BE SUBSTITUTED FOR BOULDER

J-HOOK VANE OR BOULDER CROSSVANE PER

PLAN AND DETAILS

RIFFLE SUBSTRATE

10% NCDOT CLASS A

20% NCDOT CLASS B

70% NCDOT CLASS 1

2.4

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PRELIMINARY

DESIGN

REVISIONS:

DATE: 05/13/2019

PLOT SIZE: 24" x 36"

H.D.: NAD83 (NCSP)

V.D.: NAVD88

LOG VANE WITH BOULDER J-HOOK

NOTES

1. ALL LOGS SHALL BE RELATIVELY STRAIGHT AND LIMBS AND BRANCHES SHALL BE TRIMMED FLUSH. LOGS SHALL

HAVE MINIMUM DIAMETER OF 1.5'.

2. HEADER LOGS SHALL BE UNDERLAIN BY FOOTER LOGS TO PROVIDE A SILL UNLESS OTHERWISE DIRECTED BY

THE ENGINEER. HEADER LOGS SHALL BE OFFSET SLIGHTLY DOWNSTREAM OF THE FOOTER LOG.

3. THE HEADER LOG OF THE VANE ARE SHALL TIE INTO THE STREAMBANK AT 12 TO 23 BANKFULL STAGE.

4. THE LOG VANE ARM SHALL EXTEND INTO THE OUTSIDE STREAMBANK AND STREAMBED A MINIMUM OF 10.0 FT

ON EACH END.

5. ALL GAPS/VOIDS LARGER THAN 1 INCHES BETWEEN THE HEADER AND FOOTER LOGS SHALL BE CHINKED WITH

LIMBS AND/OR BRUSH ON THE UPSTREAM SIDE PRIOR TO PLACEMENT OF THE GEOTEXTILE.

6. ALL BOULDERS USED FOR THE STRUCTURE SHALL BE STRUCTURAL STONE, CUBICAL OR RECTANGULAR IN SHAPE. THE ENGINEER MUST APPROVE THE USE OF BOULDERS THAT MAY BE AVAILABLE ONSITE. BOULDERS

DIMENSIONS SHALL BE 2.5 FT X 4.0 FT X 1.5 FT +/- 0.5 FT.

7. CONTRACTOR WILL BE REQUIRED TO FIT BOULDERS TOGETHER TIGHTLY.

8. GAPS BETWEEN BOULDERS SHALL BE MINIMIZED BY FITTING BOULDERS TOGETHER AND PLUGGING WITH NC

DOT CLASS A ROCK OR CHINKING STONE APPROVED BY ENGINEER.

9. HEADER BOULDERS SHALL BE UNDERLAIN BY FOOTER BOULDERS TO PROVIDE A FOUNDATION UNLESS OTHERWISE DIRECTED BY THE ENGINEER. HEADER BOULDERS SHALL BE OFFSET 1.0 FT UPSTREAM OF THE

FOOTER.

10. SET BOULDER INVERTS AT ELEVATION SHOWN ON THE PLAN AND PROFILE SHEETS. NO ELEVATIONS OF THE

BOULDERS MAY VARY FROM THE PLAN SHEETS WITHOUT DIRECTION FROM THE ENGINEER.

11. ON THE UPSTREAM SIDE OF THE STRUCTURE A LAYER OF NON-WOVEN GEOTEXTILE FABRIC SHALL BE PLACED AS SHOWN IN THE DETAIL ALONG THE ENTIRE LENGTH OF THE LOG VANE AND BOULDER J-HOOK. SECURE ALL GEOTEXTILE FABRIC ON TOP OF FOOTER LOG USING 3 INCH 10D GALVANIZED COMMON NAIL ON 12 IN

SPACING ALONG LOG. NAIL NON-WOVEN GEOTEXTILE TO EDGE OF HEADER LOG AND BACKFILL.

12. DIMENSIONS AND SLOPES OF STRUCTURES DESCRIBED IN THE DETAIL MAY BE ADJUSTED BY DESIGN

ENGINEER TO FIT CONDITIONS ONSITE.

13. THE SURFACE OF THIS STRUCTURE SHALL BE FINISHED TO A SMOOTH AND COMPACT SURFACE IN ACCORDANCE WITH THE LINES, GRADES, AND CROSS-SECTIONS OR ELEVATIONS SHOWN ON THE DRAWINGS.

THE DEGREE OF FINISH FOR INVERT ELEVATIONS SHALL BE WITHIN 0.1 FT OF THE GRADES AND ELEVATIONS

INDICATED.

14. RE-DRESSING OF CHANNEL AND BANKFULL BENCH/FLOODPLAIN WILL LIKELY BE REQUIRED FOLLOWING INSTALLATION OF IN-STREAM STRUCTURES AND SHALL BE CONSIDERED INCIDENTAL TO CONSTRUCTION.

DETAILED PLAN

NOT TO SCALE

CROSS-SECTION

VANE ARM INTO STREAM

BANK @

2 TO 23 BKF STAGE

B'

B

A'

A

LOG VANE WITH BOULDER J-HOOK

LOG VANE WITH BOULDER J-HOOK

DETAILED SECTION A - A'

NOT TO SCALE

SELECT

BACKFILL MATERIAL

SCOUR POOL

BELOW STRUCTURE

LOG VANE WITH BOULDER J-HOOK

PROPOSED BANKFULL WSE

BASEFLOW WSE

A

R M

S

LO

P E

- 3

A'

A

SCOUR

POOL

SELECT BACKFILL

BEHIND STRUCTURE

NON-WOVEN

GEOTEXTILE

BANKFULL

EXTEND BOULDER SILL INTO

STREAMBANK MIN 10.0 ' OR THREE

FULL BOULDER LENGTHS

HIGH DENSITY

PLANTING

HIGH DENSITY

PLANTING

EXTEND VANE ARM

INTO STREAMBANK

MIN. 10.0'

BURY LOGS INTO

STREAMBED MIN. 10.0'.

FIT BOULDERS TIGHTLY TOGETHER

HEADER BOULDER (SILL)

FOOTER BOULDER (SILL)

HEADER LOG

FOOTER LOG

NON-WOVEN

GEOTEXTILE

20 - 30o

2.5

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PRELIMINARY

DESIGN

REVISIONS:

DATE: 05/13/2019

PLOT SIZE: 24" x 36"

H.D.: NAD83 (NCSP)

V.D.: NAVD88

A'

A

SCOUR

POOL

SELECT BACKFILL

BEHIND STRUCTURE

NON-WOVEN

GEOTEXTILE

BANKFULL

EXTEND BOULDER SILL INTO

STREAMBANK MIN 10.0 FT

HIGH DENSITY

LIVE STAKING

HIGH DENSITY LIVE STAKING,

CONTAINERIZED PLANTS

OR TRANSPLANTS

EXTEND VANE ARM

AND SILL INTO

STREAMBANK

MIN. 10.0 FT

DETAILED PLAN

NOT TO SCALE

SECTION A - A' CROSS-SECTION

NOT TO SCALE

KEY BOULDERS INTO

STREAMBANK @

2 TO 23 BKF STAGE

BOULDER J-HOOK VANE

NOTES

KEY BOULDERS INTO

STREAMBANK MIN. 6 FT

OR TWO FULL BOULDER LENGTHS PLACE BOULDERS INTO STREAMBED A

MINIMUM OF THE BOULDER DIAMETER

FLOW

SCOUR POOL

NON-WOVEN

FILTER FABRIC

HEADER

BOULDER

FOOTER

BOULDER

PROPOSED BANKFULL WSE

COARSE BACKFILL

MATERIAL

FIT BOULDERS TIGHTLY TOGETHER

SLO

P

E

%BASEFLOW WSE

BANKFULL WSE

P.C. ELEVATION

PER PROFILE

NOT TO SCALE BOULDER J-HOOK VANEBOULDER J-HOOK VANE

BOULDER J-HOOK VANE

1. ALL BOULDERS USED FOR THE PROPOSED STRUCTURE SHALL BE STRUCTURAL STONE, CUBICAL OR RECTANGULAR IN SHAPE. THE ENGINEER MUST APPROVE THE USE OF BOULDERS THAT MAY BE AVAILABLE

ONSITE. BOULDERS DIMENSIONS SHALL BE 2.5 FT X 4.0 FT X 1.5 FT +/- 0.5 FT.

2. DIMENSIONS AND SLOPES OF STRUCTURES DESCRIBED IN THE DETAIL MAY BE ADJUSTED BY DESIGN

ENGINEER TO FIT CONDITIONS ONSITE.

3. CONTRACTOR WILL BE REQUIRED TO FIT BOULDERS TOGETHER TIGHTLY.

4. GAPS BETWEEN BOULDERS SHALL BE MINIMIZED BY FITTING BOULDERS TOGETHER AND PLUGGING WITH NC

DOT CLASS A ROCK OR CHINKING STONE APPROVED BY ENGINEER.

2. HEADER BOULDERS SHALL BE UNDERLAIN BY FOOTER BOULDERS TO PROVIDE A FOUNDATION UNLESS OTHERWISE DIRECTED BY THE ENGINEER. HEADER BOULDERS SHALL BE OFFSET 1.0 FT UPSTREAM OF THE

FOOTER.

3. SET BOULDER INVERTS AT ELEVATION SHOWN ON THE PLAN AND PROFILE SHEETS. NO ELEVATIONS OF THE

BOULDERS MAY VARY FROM THE PLAN SHEETS WITHOUT DIRECTION FROM THE ENGINEER.

4. NON-WOVEN GEOTEXTILE SHALL BE PLACED ON THE UPSTREAM SIDE OF THE STRUCTURE TO PREVENT WASHOUT OF SEDIMENT THROUGH BOULDER GAPS. FILTER FABRIC SHALL EXTEND FROM THE BOTTOM OF THE FOOTER BOULDER TO THE FINISHED GRADE ELEVATION AND SHALL BE PLACED THE ENTIRE LENGTH OF THE STRUCTURE. SELECT BACK FILL MATERIAL SHALL BE PLACED UPSTREAM OF THE GEOTEXTILE MATERIAL.

5. SELECT BACKFILL MATERIAL SHALL BE FILL MATERIAL GENERATED ON-SITE WITH A MINIMUM D50 OF 60 MM OR A GRADATION SUBMITTED IN WRITING AND APPROVED BY THE ENGINEER. A WELL-GRADED BLEND OF NCDOT CLASS A RIP-RAP AND ASTM #57 ROCK MIXED WITH EARTH WILL BE AN ACCEPTABLE SUBSTITUTE.

SELECT BACKFILL AND SOIL BACKFILL MATERIAL SHALL BE COMPACTED SUCH THAT FUTURE SETTLEMENT OF

THE MATERIAL IS KEPT TO A MINIMUM.

6. THE SURFACE OF THIS STRUCTURE SHALL BE FINISHED TO A SMOOTH AND COMPACT SURFACE IN ACCORDANCE WITH THE LINES, GRADES, AND CROSS-SECTIONS OR ELEVATIONS SHOWN ON THE DRAWINGS.

THE DEGREE OF FINISH FOR INVERT ELEVATIONS SHALL BE WITHIN 0.1 FT OF THE GRADES AND ELEVATIONS

INDICATED.

7. RE-DRESSING OF CHANNEL AND BANKFULL BENCH/FLOODPLAIN WILL LIKELY BE REQUIRED FOLLOWING INSTALLATION OF IN-STREAM STRUCTURES AND SHALL BE CONSIDERED INCIDENTAL TO CONSTRUCTION.

1 FT OFFSET

2.6

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PRELIMINARY

DESIGN

REVISIONS:

DATE: 05/13/2019

PLOT SIZE: 24" x 36"

H.D.: NAD83 (NCSP)

V.D.: NAVD88

1. ALL OUTSIDE MEANDER BENDS WITH RADIUS OF CURVATURE RATIO LESS THAN 4.0 SHALL BE PROTECTED

WITH BANK REVETMENTS.

2. COARSE WOODY DEBRIS SHALL CONSIST OF LOGS, ROOTWADS, AND LARGE BRANCHES NOT SUITABLE FOR

CONSTRUCTION OF LOG STRUCTURES. ALL MATERIALS ARE TO BE APPROVED BY THE ENGINEER. COARSE WOODY DEBRIS SHALL BE CONSTRUCTED WITH THE LARGEST MATERIAL PLACED FIRST. NO LOGS SHALL BE PLACED PARALLEL TO THE FLOW OF WATER, UNLESS DIRECTED BY THE ENGINEER. LOGS SHALL BE PLACED IN

A CROSSING PATTERN OR WEAVE SUCH THAT EACH LOG IS ANCHORED BY ANOTHER LOG.

3. SMALL/FINE WOODY DEBRIS SHALL CONSIST OF MEDIUM TO SMALL LIMBS, BRANCHES, BUSHES, AND/OR

LOGS. INVASIVE SPECIES SHALL NOT BE USED. SMALL/FINE WOODY DEBRIS SHALL BE PLACED ABOVE THE

COARSE WOODY DEBRIS WITH THE LARGEST MATERIAL BEING PLACED FIRST AND THE SMALLEST MATERIAL

PLACED LAST.

4. ALL WOODY DEBRIS SHALL BE COMPACTED WITH THE EXCAVATOR BUCKET TO REDUCE THE PRESENCE OF

VOIDS IN THE SMALL/FINE WOODY DEBRIS LAYER.

5. GRAVEL LEVELING BASE SHALL BE INSTALLED ABOVE THE HIGHEST ELEVATION OF THE WOODY DEBRIS

BEFORE THE SOIL LIFTS ARE INSTALLED.

6. THE SOIL BACKFILL USED FOR LIFTS AND TOPSOIL USED FOR LAYERING WITH THE LIVE BRANCHES SHALL BE FREE OF ANY LARGE ROOTS OR WOODY DEBRIS AND SHALL GENERALLY BE FREE FROM ANY GRAVEL OR

COBBLE MATERIAL.

7. SOIL BACKFILL SHALL BE COMPACTED SUCH THAT FUTURE SETTLING WILL BE KEPT TO A MINIMUM; YET, NOT

SUCH THAT THE UNDERLYING BRUSH IS DISPLACED OR DAMAGED. THE TOP OF THE BACKFILL FOR THE FIRST

LIFT SHALL BE SLOPED AT APPROXIMATELY 5% AWAY FROM THE STREAM.

8. PLACE A LAYER OF TOPSOIL AND LIVE BRANCHES ON THE GRAVEL LEVELING BASE SUCH THAT APPROXIMATELY 6 INCHES TO 1 FOOT OF EACH LIVE BRANCH WILL BE EXPOSED AND THE REMAINDER (2' TO

4') OF EACH LIVE BRANCH WILL BE COVERED BY THE SOIL LIFT. LIVE BRANCHES SHALL BE OF THE SPECIES

SPECIFIED FOR LIVE STAKES OR APPROVED BY THE ENGINEER.

9. PLACE A LAYER OF 6.5 FEET WIDE BIODEGRADABLE EROSION CONTROL BLANKET AND 700 GRAM EROSION CONTROL MATTING, ON TOP OF THE TOPSOIL AND LIVE BRANCHES SUCH THAT 2.5 FEET OF THE BLANKET

WILL BE BURIED BELOW THE NEXT SOIL LIFT. ALLOW THE REMAINING 4.5 FEET OF BLANKET AND MATTING

TO HANG OVER THE GRAVEL LEVELING BASE.

10. PLACE SOIL BACKFILL UP TO THE LIFT HEIGHT SPECIFIED OF NO GREATER THAN 1.0 FT BEING CAREFUL NOT

TO PUSH/PULL OR TEAR THE FABRIC PREVIOUSLY PLACED.

11. TOP DRESS THE SOIL LIFT WITH TOPSOIL FROM THE FACE OF THE SOIL LIFT BACK INTO THE FLOODPLAIN AT

LEAST 4FT.

12. THE EROSION CONTROL FABRICS SHALL BE PULLED AS TIGHT AS POSSIBLE WITHOUT TEARING OR EXCESSIVELY DISTORTING THE FABRIC. SECURE THE EROSION CONTROL AND NON-WOVEN MATTING IN PLACE BY STAKING THE END OF THE EROSION CONTROL FABRIC WITH WOODEN STAKES ON 1.5-FOOT

CENTERS.

13. REPEAT STEPS 8 THROUGH 12 AS NEEDED TO BUILD SOIL LIFTS UP TO DESIGN BANKFULL ELEVATION.

14. THE SURFACE OF THIS STRUCTURE SHALL BE FINISHED TO A SMOOTH AND COMPACT SURFACE IN

ACCORDANCE WITH THE LINES, GRADES, AND CROSS-SECTIONS OR ELEVATIONS SHOWN ON THE

DRAWINGS. THE DEGREE OF FINISH FOR ELEVATIONS SHALL BE WITHIN 0.1 FT OF THE GRADES AND

ELEVATIONS INDICATED OR APPROVED BY THE ENGINEER.

15. RE-DRESSING OF CHANNEL AND BANKFULL BENCH/FLOODPLAIN WILL LIKELY BE REQUIRED FOLLOWING

INSTALLATION OF IN-STREAM STRUCTURES AND SHALL BE CONSIDERED INCIDENTAL TO CONSTRUCTION.

DETAILED PROFILE - SECTION A - A'

NOT TO SCALE

DETAILED PLAN

NOT TO SCALE

NOTES

TOE WOOD REVETMENT

APPROX. BASE FLOW WSE

STREAMBED

3:1 TO BANKFULL

SELECT GRAVEL BACKFILL AND TOPSOIL

FOR BASE OF FIRST SOIL LIFT

FL

OW

TOE WOOD

REVETMENT

A

GRAVEL BASE

FILL VOIDS WITH FINE WOODY MATERIAL

LIVE CUTTINGS

SELECT SOIL BACKFILL

UNDISTURBED OR

COMPACTED EARTH

EXCAVATION LIMITS

BANKFULL

A'

LIVE CUTTINGS

BANKFULL

SOIL GEOLIFT WITH EROSION CONTROL

BLANKET (ECB) AND 700 GRAM EROSION

CONTROL MATTING (ECM) (EACH LIFT

REQUIRES 1 LAYER OF ECB AND ECM)

LIVE STAKES AND BARE ROOTS

WOOD STAKE

COARSE WOODY

DEBRIS (4"- 10")

MIN. WIDTH OF

MATTING = 4'

TOE WOOD REVETMENT

TOE WOOD REVETMENT

FINE WOODY

DEBRIS (2" - 4")

1.0' OFFSET

1.0' MAX

2.7

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PRELIMINARY

DESIGN

REVISIONS:

DATE: 05/13/2019

PLOT SIZE: 24" x 36"

H.D.: NAD83 (NCSP)

V.D.: NAVD88

3'

BANKFULL

2.5' (TYP)

6" MIN. HORIZONTAL

OVERLAP

2.

5'

(T

YP

2.

5' (T

YP

2' (T

YP

2'

(TYP)

6" MIN. VERTICAL

OVERLAP

A A'

700 GRAM COIR FIBER MATTING

FROM TOE OF CHANNEL TO

3 FT BEYOND BANKFULL

BANKFULL

CHANNEL TOE OF SLOPE

700 GRAM COIR

MATTING

2' LONG 2" x 2" WOOD STAKES w/ 3" GALVANIZED ROOFING NAIL

AT THE TOP TO SECURE MATTING

6" MIN. HORIZONTAL

OVERLAP

EROSION CONTROL MATTING

DETAILED STAKING PLAN

NOT TO SCALE

EROSION CONTROL MATTING

DETAILED PLAN

NOT TO SCALE

1. EROSION CONTROL MATTING IS USED TO PROTECT RECENTLY CONSTRUCTED STREAMBANKS FROM

EROSION. THE MATTING WILL REMAIN INTACT WHILE THE BANK AND RIPARIAN VEGETATION

MATURES, PROVIDING CRITICAL BANK PROTECTION.

2. BEFORE INSTALLING COIR FIBER MATTING, RAKE SOIL LEVEL, ADD TEMPORARY AND PERMANENT

SEED, FERTILIZER, LIME AND MULCH.

3. 700 GRAM COIR FIBER EROSION CONTROL MATTING SHALL BE PLACED ALONG THE LENGTH OF THE

NEW CHANNEL FROM THE TOE OF SLOPE OUT TO A MINIMUM OF 4.0' BEYOND THE BANKFULL

ELEVATION.

4. SECURE COIR MATTING IN PLACE BY STAKING AND OVERLAPPING AT THE SEEMS WITH A

SHINGLE-TYPE METHOD SUCH THAT THE OVERLAPPING PIECE IS IN THE SAME DIRECTION AND AS

THE STREAM FLOW. ADDITIONAL STAKING SHALL BE APPLIED BY THE CONTRACTOR AT NO

ADDITIONAL COST IF THE MATTING SEPARATES FROM THE SOIL MORE THAN ONE INCH UNDER A

REASONABLE PULL.

700 GRAM COIR FIBER MATTING

SUPPLEMENT WOODEN STAKES

WITH 12" ECO-STAKES

2' LONG 2" x 2" WOOD STAKES w/ 3" GALVANIZED ROOFING NAIL

AT THE TOP TO SECURE MATTING

EROSION CONTROL MATTING

DETAILED CROSS-SECTION A - A'

NOT TO SCALE

EROSION CONTROL MATTING

NOTES

2.8

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PRELIMINARY

DESIGN

REVISIONS:

DATE: 05/13/2019

PLOT SIZE: 24" x 36"

H.D.: NAD83 (NCSP)

V.D.: NAVD88