20191748 Ver 2_More Info Received_20200514

Homewood, Sue
From:
Adam Williams <[e-mail]>
Sent:
Thursday, May 14, 2020 10:58 AM
To:
Fuemmeler, Amanda J CIV (US); Homewood, Sue
Cc:
'John Welfare'
Subject:
[External] Twin Rivers Revisions
Attachments:
5-14-20_TwinRive rs_Site_Plans.pdf
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Hello Amanda & Sue,
Attached please find the Twin Rivers design revisions per yesterday's meeting including:
• Project Phasing is depicted in the plan set (sheet 2/18),
• Rock sills have been re -arranged to create more of a floodplain sill. Note in sheet 2/18 — BFEC staff will stake out
the location of the rock sills as to minimize tree loss.
• Vernal pool is shown to be excavated in the larger secondary channel (sheet 5/18),
• Smaller secondary channel: 1) location is now more accurately depicted; 2) Fill hatching was lost in the smaller,
backwater secondary channel (per Amanda's field comments),
• Small rock sill placed in entrance of secondary channel (also redrawn more accurately which ties to Watauga
River) as to stop head cutting.
We expect no changes to the PCN in terms of impact lengths, etc.
If you would, let me know you received this and if you have any questions. Thanks,
Adam Williams, PWS
Brushy Fork Environmental Consulting, Inc.
10565 Highway 421 South
Trade, Tennessee 37691
ph: 423.727.4476
cell: 828.773.3820
www.bfec.org [bfec.orgl
"Whether you think you can, or you think you can't --you're right." - Henry Ford
1

TWIN RIVERS
WATAUGA RIVER STABILIZATION
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Twin Rivers POA Location
Map
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MN 6.90" W 0 1 KILOMETER
&V 46' 00.00" W 6w 46' 00.00" W 061° 44' 00.00" W
Name: BOONE (NC)
Date: 06/20/18
Scale: 1 inch = 2,000 ft.
baWm:KAbdA
Location: 036° 09' 56.44" N 081' 44' 50.01" W
SHEETINDEX
COVER
1
OVERALL SITE PLAN
2
WATAUGA RIVER PLAN AND PROFILE 1-6
3-8
WATAUGA RIVER CROSS -SECTIONS 1-13
9-10
MORPHOLOGICAL TABLE/TYPICAL CROSS SECTION
11
CONSTRUCTION DETAILS
12-18
GENERAL NOTES:
1. STREAM ASSESSMENT DATA (LONGITUDINAL PROFILE,
CROSS -SECTIONS, ETC.) PRESENTED HEREIN COLLECTED BY
BFECIBFED.
2. CONTOUR DATA PRESENTED IN THIS DOCUMENT IS TAKEN FROM
NCDOT LIDAR DATA (2' and 10' CONTOURS).
3. HORIZONTAL AND VERTICAL GRID CONTROL TIED TO PROJECT BY
BFED. SURVEY DATA USED FOR DESIGN IS RELATIVE TO ITSELF
AND APPROXIMATELY SET TO REAL WORLD COORDINATES BASED
ON LIDAR DATA.
4. PRIOR TO CONSTRUCTION, BFEC WILL FLAG TREES APPROVED TO
BE REMOVED DURING CONSTRUCTION AS AN EFFORT TO
PRESERVE THE EXISTING RIPARIAN BUFFER.
EROSION AND SEDIMENT CONTROL NOTES:
1. ONCE SITE CONSTRUCTION WITHIN AN AREA HAS CEASED ALL
DISTURBED AREAS WILL BE IMMEDIATELY SEEDED
(TEMPORARY & PERMANENT SEED), MATTED (COIR AND
COCONUT FIBER EROSION CONTROL BLANKET, NAG C700BN),
AND STABILIZED (SEE SHEET 12).
2. LIVE STAKES AND BIODEGRADABLE MATTING STAKES WILL BE
USED TO SECURE THE MATTING.
3. BROADCAST SEEDING RATES WILL BE AS SPECIFIED ON SHEET
12
4. NATIVE SHRUB AND TREE SPECIES WILL BE PLANTED
THROUGHOUT THE PROJECT AREA ATA RATE OF 350+
STEMS/ACRE, SECURING NEAR BANKAREAS AND PROVIDING
FUTURE SHADING OF CHANNEL (SEE CHANNEL REVEGETATION
DETAIL SHEET 12).
5. PRECAUTIONS WILL BE TAKEN TO KEEP HEAVY EQUIPMENT OUT
OF THE STREAM CHANNEL EXCEPT WHERE ABSOLUTELY
NECESSARY TO INSTALL BANK STABILIZATION/ENHANCEMENT
MEASURES AND IN -STREAM STRUCTURES.
6. NO CONSTRUCTION ACTIVITIES WILL OCCUR OUTSIDE THE
CONSTRUCTION LIMITS AS SHOWN ON THE SITE PLAN.
TO THE BEST OF MY KNOWLEDGE, JUDGMENT,
AND BELIEF THESE PLANS MEET APPLICABLE
NRCS STANDARDS AND LOCAL AND STATE
REGULATIONS.
60% PROGRESS DRAWINGS
DO NOT USE FOR CONSTRUCTION
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1118

VS6 A 12+86
LEGEND EXISTING TOP OF BANK ____LOD_____________ Install Rootwad Revetments for toe protection.
� —
XS4 S XS STA 11 +4§- -Rootwads shall be harvested using trees
EXISTINGTHALWEG -�' _ _ with ex sedrootmat-along banks
\ 1
2'EXISTING CONTOURS < _Realign and Widen Channel
\/ 10' EXISTING CONTOURS —' O6 through excavation of excess
'bw material.
PROPOSED DESIGN
PROPOSEDCHANNEL
REALIGNMENT . —
i Natural Bedrock Step
RIPARIAN / - - Grade Control
PLANTINGNy.
GROUND DISTURBANCE
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®CHANNEL TO BE
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K to TOEWOOD
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SINGLE WING
DEFLECTOR
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Excavate vernal ...
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-- Floodplain cut -through channel to be filled. "
LOD Sills will be added to prevent river
ration and erosion of flood lain.
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PLANTING
EM GROUND DISTURBANCE
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® STOCKPILE
LIMITS OF DISTURBANCE
0 30 60 120
Feet
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Grade and Slope (3:1) Riverbank,
Stockpile protecting existing mature riparian trees
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® BRIDGE
PROPOSED DESIGN
RIPARIAN
PLANTING
GROUND DISTURBANCE
SINGLE ROCK VANE
SINGLE WING
DEFLECTOR
CONSTRUCTION ACCESS
LIMITS OF DISTURBANCE
0 30 60 120
Feet
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294
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293
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0 293
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292
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. from bar between
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Install Single Rock Vane
_ — — — — — ---LOD---___ tied into bank just upstream
LOD — ----- of erched culvert
Install Single Rock Vane Grade and Slope (2:1 max) Riverbank,
for bank protection and to protecting existing mature trees,
narrow low flow channel Sta 21 +50 - 27+00
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PLANTING
GROUND DISTURBANCE
v TOEWOOD
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LIMITS OF DISTURBANCE
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CONDITION �' CONDITION BANKFULL
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Sheet
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Typical Riffle XS Dimensions
112.3
x-section area (ft.sq.�
54.0
width eft}
2.1
mean depth tft�
2.4
max depth eft}
Summary Morphological Table
Watauga Raver
Stream Parameter
Existing
Proposed
Typical
Station
D+DD - 31+OD
O+DO - 31+OD
Stream Type
B4/C4
B4/C4
Drainage Area {sq mi]
12.3
12.3
Bankfull Area (sq ft)
Avg: 106.2/ Range: 103.1-109.1
Avg: 110.5/ Range: 104.5-114.9
112.3
Bankfull Width (ft)
Avg: 61.3/ Range: 45.8-76.6
Avg: 66.9 / Range:47.1-78.4
54.0
Bankfull Depth (ft)
Avg: 1.7 /Range: 1.4-2.2
Avg; 1.7 /Range; 1.4-2.3
2.1
Bankfull Max Depth
Avg: 3.D/Ran ge: Z.3-3.7
Avg: 3A /Range: 2.4-3.8
2.4
Estimated Bankfull Velocity {ft/sec}
Avg: 4.D/Range: 3.6-4.7
Avg: 4.0 /Range: 3.4-4.5
Estimated Bankfull Discharge (cuft/se[}
Avg:4Z8.3 / Range: 374.1-503.2
Avg: 438.3 / Range: 357.5-514.9
Bankfull Widths Depth Ratio
Avg: 35.6/ Range: 21.2-54.2
Avg:4fl.5/ Range: 20.6-55.8
26.0
Flood rune Width
Avg: 135.fl/Ranee: 64.4-200.0
Avg: 147.0/Ran e:64.4-362.fl
108.0
Entrenchment Ratio
Avg: 2.2 /Range: 1.4-5.0
Avg: 2.1 /Range: 1.2-5.2
2.0
Bank Height Ratio
Aug: 1.8/Ran ge: 1.2-2.3
Avg:1.4 /Range: 1.0-2.3
1.0
Sinuosity
1.0
1.0
Water Surface Slope (ft/ft)
0.0079
0.0081
Riffle Length (ft)
Avg: 77.6/Range: 29.6-205.4
Avg: 83.6/ Range: 11.4-205.4
Riffle Length Ratio
Avg: 1.3 /Range: 0.4-3.6
Avg:1.3 / Range: 0.2-3.3
Riffle Slope (ft/ft)
Avg: 0.0170/ Range: 0.0027-0.045
Avg: 0.0220/Range: 0.0049-D.095
Riffle Slope Ratio
Avg; 2.2 f Range: 0.3-5.7
Avg: 2.7 /Range; 0.6-11.7
Pool Area (sq ft)
Avg: 135.4 / Range: 113.1-193.4
Avg: 129.6/ Range: 113,4145.0
145.5
Pool Bkf Width (ft)
Avg: 72.4/ flange: 50.7-120.3
Avg: 62.8 /Range; 50.7-80.3
54.0
Pool Bkf Depth (ft)
Avg: 2.Q/Ran ge: 1.4-23
Avg: 2.1/Range:. 1.6-2.7
2.7
Pool Max Depth (ft)
Avg: 3.8 / Ran ge: 3.1-4.7
Avg: 3.8 /Range: 3.1-4.7
3.4
Pool Length {ft}
Avg: 109.9 / Range: 22.8-325.4
Avg: lll.fl /Range: 5.6-316.4
Pool Length Ratio
Avg: 1.9 /Range: 0.3-5.$
Avg: 1.7 /Range: 0.1-5.0
Pool to Pool Seating (ft)
Avg: 181.9 / Range: 55.9-531.8
Avg: 181.9 Range: 18.6-521.8
P-P Spacing Ratio
Avg: 3.Q/Range: 0.8-9.4
Avg: 2.8 /Range:. 0.3-8.3
Inner Berm Area {sq ft}
Avg: 34.8/ Range: 29.6-39.4
Avg: 34.3/ Range: 29.0-38.8
42.6
Inner Bern Width {ft}
Av :41.5 /Ran e: 32.7-55.7
Ave: 41.4 i Range: 32.8-51.8
45.6
Inner Berm Depth (ft)
Avg: 0.9 Range: 0.6-1.0
Avg: 0.9 Range: 0.7-1.0
0.9
Inner Berm Max Depth (ft)
Avg: 1.5 /Range: 1.1-2.2
Avg: 1.5 /Range: 1.2-1.9
1.6
D50(mm)
54
54
D84 (mm)
120
120
Typical Pool XS
Dimensions
145.5 x-section area (ft.sq.)
54.0 width (ft)
2.7 mean depth (ft)
3.4 max depth (ft)

TYPICAL CHANNEL RE -VEGETATION PLAN VIEW DETAIL
PROJECTSPECIFICATIONS^ u^J�V v �^.�v � yv �„.��„.�
6"
PLAIN VICVV
SYMBOL
DESCRIPTION
SYMBOL
DESCRIPTION
NATIVE SOD MATTING AND/OR EROSION CONTROL FABRIC ARE TO BE
NATIVE TREE AND SHRUB
PLACED ON NEAR BANKAND DISTURBED AREAS WHEN AVAILABLE.
(BAREROOT OR I-3 GALLON
CONTAINERS) SPECIES TO BE
1. SEED IMME DIATELY WITH TEMPORARY RYEGRASS.
2. FOLLOWING CONSTRUCTION, AREA TO BE SEEDED WITH A
PERMANENT GRASS/HERB MIXTURE. MATTING AND FABRIC ARE TO
BE STAKED DOWN WITH LARGE STAPLES AND/OR NATIVE/WOODY
STAKES.
__ —
PLANATADENSITVSUFFICIENT
TO PROVITEDDE400 TREES/ACRE AT
MATURLEY-FLOODPLAIN SPECIES
INCLUDE BUT ARE NOT LIMITED TO:
Acer rubium, Amelanchier
IM
3. UVESTAKE SPECIES INCLUDE BUT ARE NOT LIMITED TO:
arborea, Betula nigra, flex spp.,
Cornus amomum, Physocarpus opul¢olius, Salix serecia, Sambucus
luglands nigra, briodendron
tulip¢erc Malus coronaria,
conadensis.
Physocarpus opulifolius, quercus
rubra, etc.
EROSION CONTROL MATTING
1 12" 1
4"
6 4
COMBINATIONOF
CONTAINER OR BARE -ROOT
NATIVE TREES &/OR 59RJB5
(SEE PLAN VIEW DETAIL FOR
1 6" 1
A
B O
== III F
.� III—I�I�
CRITICAL POINTS
A. Overlaps and Seams l r
° NOTE:
IN LOOSE SOIL CONDITIONS
B. Projected Water Li
ne
C. Channel Bottom/Side
THE USE OF STAPLE OR STAKE
Slope Vertices = �
\ LENGTHS GREATER THAN 6" (15
' CM) MAY BE NECESSARY TO
PROPERLY SECURE THE
i "'
A -_I _ "Ifs-1 ' =III BLANKETS.
B I III1 I I ��i)r-� l11 1 11 I
=��1 Ir-Lr. i 11,-I Il iiEl`I =III=III
SPECIES)
I"KI 0LJ\I
SLOPE INSTALLATION INSTRUCTIONS: Ci-70OBN
1. PREPARE SOIL BEFORE INSTALLING BLANKETS, INCLUDING ANY NECESSARY APPLICATION OF LIME, FERTILIZER, AND SEED.
2. BEGIN ATTHE TOP OF THE SLOPE BY ANCHORING THE BLANKET IN A 6" (15 CM) DEEP X 6" (15 CM) WIDE TRENCH WITH APPROXIMATELY 12"
(30CM) OF BLANKET EXTENDED BEYOND THE UP -SLOPE PORTION OF THE TRENCH. ANCHOR THE BLANKET WITH A ROW OF STAPLES/STAKES
APPROXIMATELY 12" (30 CM) APART IN THE BOTTOM OF THE TRENCH. BACKFILL AND COMPACT THE TRENCH AFTER STAPLING. APPLY SEED TO
COMPACTED SOIL AND FOLD REMAINING 12" (30 CM) PORTION OF BLANKET BACK OVER SEED AND COMPACTED SOIL. SECURE BLANKET OVER
COMPACTED SOIL WITH A ROW OF STAPLES/STAKES SPACED APPROXIMATELY 12" (30 CM) APART ACROSS THE WIDTH OF THE BLANKET.
3. ROLL THE BLANKETS INDIRECTION OF WATER FLOW. BLANKETS WILL UNROLL WITH APPROPRIATE SIDE AGAINST THE SOIL SURFACE. ALL
BLANKETS MUST BE SECURELY FASTENED TO SOIL SURFACE BY PLACING STAPLES/STAKES INAPPROPRIATE LOCATIONS AS SHOWN IN THE STAPLE
PATTERN GUIDE. WHEN USING THE DOT SYSTEM, STAPLES/STAKES SHOULD BE PLACED THROUGH EACH OF THE COLORED DOTS CORRESPONDING
TO THE APPROPRIATE STAPLE PATTERN.
4. THE EDGES OF PARALLEL BLANKETS MUST BE STAPLED WITH APPROXIMATELY 2" - 5" (5 CM - 12.5 CM) OVERLAP DEPENDING ON BLANKET TYPE. 5.
CONSECUTIVE BLANKETS SPLICED DOWN THE SLOPE MUST BE PLACED END OVER END (SHINGLE STYLE) WITH AN APPROXIMATE 3" (7.5 CM)
OVERLAP. STAPLE THROUGH OVERLAPPED AREA, APPROXIMATELY 12" (30 CM) APART ACROSS ENTIRE BLANKET WIDTH.
5. PLACE CONSECUTIVE BLANKETS END -OVER -END (SHINGLE STYLE) WITH A4"-6" OVERLAP. USE A DOUBLE ROW OF STAPLES STAGGERED 4" APART AND
4" ON CENTER TO SECURE BLANKETS.
6 FULL LENGTH EDGE OF BLANKETS AT TOP OF SIDE SLOPES MUST BE ANCHORED WITH A ROW OF STAPLES/STAKES APPROXIMATELY 12"(30CM)
APART IN A 6"(15CM) DEEP X 6"(15CM) WIDE TRENCH. BACKFILL AND COMPACT THE TRENCH AFTER STAPLING.
7. ADJACENT BLANKETS MUST BE OVERLAPPED APPROXIMATELY 2"-5" (5-12.5CM) (DEPENDING ON BLANKETS TYPE) AND STAPLED.
INSPECTION AND MAINTENANCE:
This consists primarily of two components, stream stabilization
structures (J-Hooks, Cross vanes, etc.) and planting of the stream
banks and riparian areas. In the event that the stream structures
shift, wash away, settle, or otherwise physically cannot function as
designed, contact the area NRCS Agent. If the new plantings
experience a mortality rate of greater than 25%, the dead/dying
plants will need to be replaced.
PERMANENT SEED MIX:
APPLY AT 15 LBS PER ACRE OF DISTURBANCE (per specifications of
seed supplier):
ERNST CONSERVATION SEED MIX ERNMX-178 (FLOODPLAIN MIX)
WHICH INCLUDES THE FOLLOWING SPECIES:
Fox Sedge, Partridge Pea, Dear Tongue, Little Bluestem, Virginia Wild
Rye, Riverbank Wild Rye, Swamp Sunflower, Ox Eye Sunflower, Arrow
Wood, Big Bluestem, Silky Dogwood, Switchgrass, Indiangrass,
Staghorn Sumac, Showy Tick Trefoil, Purple Bergamot, Black Eyed
Susan, Joe Pye Weed , Soft Rush, Giant Ironweed, Tall White Beard
Tongue, Spotted Joe Pye Weed, Bone Set, and Blue False Indigo.
TEMPORARY SEED MIX AND SPECIFICATIONS:
Common Name Scientific Name Rate per Acre Optimal
Planting Dates
Rye grain Secale cereale 30 Ibs Aug 15
- May 15
Browntop millet Urochloa ramosa 10 Ibs May 15
- Aug 15
Seedbed Preparation:
Disturbed soils within riparian areas will be amended to provide an
optimum environment for seed germination and seedling growth.
Surface soils will be loose enough for water infiltration and root
penetration. Lime will be added to the soil to ensure a pH level
between 5.5 - 7. Fertilizer (18-46-0) will be added to nutrient deficient
areas. All riparian areas will be raked to loosen compacted soil prior to
seeding.
TYPICAL BEDFORM GRADING DETAIL
RUN POOL
�Uo
F
��F�E RIFFI RIFFLE
F
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POOL G�� RUN POOL
PLAN VIEW \
W
Sheet
211

TEMPORARY CONSTRUCTION EXIT DETAIL
50' MIN.
EXISTING NATURAL
GROUND
PUBLIC ROAD
CLEAN WASHED STONE SIZES
3" UNDERCUT PRIOR TO -1 FROM 2" TO 4" 8" DEPTH
PLACEMENT OF MACHINED --- f
RIPRAP
TEMPORARY DRAINAGE
PIPE WHERE NEEDED
GEOTEXTILE FABRIC SHALL BE
PLACED UNDER ENTIRE
WIDTH OF RIPRAP
SECTION A -A
PLACE WOVEN WIRE FENCE BACKING BETWEEN FABRICAND
POSTS AND FASTEN SECURELY.
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FLOW FLOW
PERSPECTIVE VIEW
EDGE OF
PUBLIC ROAD
0
WIRE -BACKED SILT FENCE
48"MINIMUM LENGTH STEEL POST
DRIVEN A MINIMUM OF 18" INTO
GROUND
48" MINIMUM STEEL
POSTLENGTH
FLOW
FILTER
CLOTH
28"MINIMUM HEIGHT OF
GEOTEXTILE CLASS F
6" MINIMUM DEPTH IN
GROUND
PLACE WOVEN WIRE FENCE
BACKING BETWEEN FABRIC
AND POSTS AND FASTEN
SECURELY.
STEEL POST SECTION
MINIMUM 30"ABOVE
GROUND
UNDISTURBED
GROUND
F.11
CLEAN WASHED STONE SIZES FROM 2" TO 4" 8"
DEPTH WITH GEOTEXTILE FABRIC
% TEMPORARY DRAINAGE
/ PIPE WHERE NEEDED
NOTES:
1. STEEL POSTS SHALL BE A MINIMUM OF 48" LONG DRIVEN A MINIMUM OF 18" INTO THE
GROUND. THE STEEL POSTS MAY BE A STANDARD TOR U SECTION WEIGHING NO LESS
THAN 1.3 LBS/FT.
2. GEOTEXTILE AND WOVEN WIRE FENCE BACKING SHALL BE FASTENED SECURELY TO EACH
POST FROM TOP TO GROUND LEVEL AND THE GEOTEXTILE SHALL MEET THE FOLLOWING
REQUIREMENTS:
TENSILE STRENGTH WARP 260 LBS/IN. (MIN), FILL 180 LBS/IN.
BURSTING STRENGTH 175 LBS/IN. (MIN)
FLOW RATE 70 GPM/SQ. FT.
3. WHERE ENDS OF GEOTEXTILE FABRIC COME TOGETHER THEYSHALL BE OVERLAPPED,
FOLDED, AND SECURED TO PREVENT SEDIMENT BYPASS.
4. SILT FENCE SHALL BE INSPECTED BEFORE AND AFTER EACH RAIN EVENT AND MAINTAINED
WHEN BULGES OCCUR OR WHEN SEDIMENT ACCUMULATION REACHES 50% OF THE FABRIC
HEIGHT.
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EMBED GEOTEXTILE CLASS F '
A MINIMUM OF 6" VERTICALLY STEEEL L PI
INTO THE GROUND —MINIMUM OF 18" INTO
THE GROUND
POSTS 2
SECTION B CROSS-SECTION
SECTION A am Sheet
TOP VIEW 1 1
(JOINING TWO ADJACENT _\.KJ I
SILT FENCE SECTIONS)

SLOPE INSTALLATION
700 C01 R F---
(5 CM-12.5 CM)
M)
W W W W W W W W W W W W W W W W W W W W
W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W
W W W W W W W W W
(15 C�1)
::::::::::
.....................................................................................
t :.::::::::: NOTE:
....................................................................................
*IN LOOSE SOIL CONDITIONS, THE
USE OF STAPLE OR STAKE LENGTHS
GREATER THAN 6" 15 CM MAY BE
i
NECESSARY TO PROPERLY SECURE
}3E ::1f20b. THE BLANKETS.
SLOPE INSTALLATION INSTRUCTIONS:
1. PREPARE SOIL BEFORE INSTALLING BLANKETS, INCLUDING ANY NECESSARY APPLICATION OF LIME,
FERTILIZER, AND SEED. NOTE: WHEN USING CELL-O-SEED DO NOT SEED PREPARED AREA. CELL-O-SEED
MUST BE INSTALLED WITH PAPER SIDE DOWN.
2. BEGIN AT THE TOP OF THE SLOPE BY ANCHORING THE BLANKET IN A 6" (15 CM) DEEP X 6" (15 CM)
WIDE TRENCH WITH APPROXIMATELY 12" (30cm) OF BLANKET EXTENDED BEYOND THE UP -SLOPE
PORTION OF THE TRENCH. ANCHOR THE BLANKET WITH A ROW OF STAPLES/STAKES APPROXIMATELY 12"
(30 CM) APART IN THE BOTTOM OF THE TRENCH. BACKFILL AND COMPACT THE TRENCH AFTER STAPLING.
APPLY SEED TO COMPACTED SOIL AND FOLD REMAINING 12" (30 CM) PORTION OF BLANKET BACK OVER
SEED AND COMPACTED SOIL. SECURE BLANKET OVER COMPACTED SOIL WITH A ROW OF
STAPLES/STAKES SPACED APPROXIMATELY 12" (30 CM) APART ACROSS THE WIDTH OF THE BLANKET.
3. ROLL THE BLANKETS (A.) DOWN OR (B.) HORIZONTALLY ACROSS THE SLOPE. BLANKETS WILL UNROLL
WITH APPROPRIATE SIDE AGAINST THE SOIL SURFACE. ALL BLANKETS MUST BE SECURELY FASTENED TO
SOIL SURFACE BY PLACING STAPLES/STAKES IN APPROPRIATE LOCATIONS AS SHOWN IN THE STAPLE
PATTERN GUIDE. WHEN USING THE DOT SYSTEM , STAPLES/STAKES SHOULD BE PLACED THROUGH
EACH OF THE COLORED DOTS CORRESPONDING TO THE APPROPRIATE STAPLE PATTERN.
4. THE EDGES OF PARALLEL BLANKETS MUST BE STAPLED WITH APPROXIMATELY 2" - 5" (5 CM - 12.5 CM)
OVERLAP DEPENDING ON BLANKET TYPE. 5. CONSECUTIVE BLANKETS SPLICED DOWN THE SLOPE MUST BE
PLACED END OVER END (SHINGLE STYLE) WITH AN APPROXIMATE 3" (7.5 CM) OVERLAP. STAPLE
THROUGH OVERLAPPED AREA, APPROXIMATELY 12" (30 CM) APART ACROSS ENTIRE BLANKET WIDTH.
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Sheet
411

ROCK J-HOOK VANE STRUCTURE
MATERIAL NOTES:
1. ROCK DIMENSIONS SHALL BE APPROXIMATELY 1'-2' THICK, 2'-3'
WIDE, AND 3'-5' LONG.
2. ROCK SHALL BE NATIVE STONE HARVESTED LOCALLY OR FROM
EXISTING STREAM.
3. THE ROCKS SHOULD BE RECTANGULAR OR NEARLY SO AT THE
ROCK TO ROCK CONTACT. THE ROCK TO ROCK CONTACT
SHOULD BE SOLID. IF ROCKS ARE NOT PERFECTLY FLAT, THE
THICKER END SHOULD BE PLACED DOWNSTREAM.
CONSTRUCTION NOTES:
1. STRUCTURE DIMENSION, ELEVATION, AND LOCATION LOCATION
DETAILS PROVIDED IN TABLES.
2. THE LOWER ROCK FOOTER WILL FIRST BE PLACED FOLLOWED BY
THE HEADER ROCK TO SET THE INITIAL STRUCTURE ELEVATION.
3. THE SUBSEQUENT ROCK (MOVING UPSTREAM) AND ASSOCIATED
FOOTERS WILL THEN BE SET SIGHTING THE PROPOSED 20-30° BANK
DEFLECTION LINE.
4. ROCK PLACEMENT FOLLOWS MOVING UPSTREAM AT A 2-7% SLOPE
UNTIL A BANKFULL ELEVATION IS REACHED AT THE END OF THE
STRUCTURE WING.
5. A ROCK SILL WILL THEN BE CONSTRUCTED PERPENDICULAR TO THE
STRUCTURE ANGLE TO PREVENT THE FORMATION OF A CUTOFF
CHANNEL.
6. A TRENCH SHALL BE DUG UPSTREAM ON THE BANKSIDE OF THE
VANE ARM WHERE NON -WOVEN GEOTEXTILE FABRIC WILL BE PLACED
WITH APPROX. 2' OF OVERLAP
7. BACKFILL TRENCH WITH NATIVE MATERIALS AND RE -VEGETATE. Q
O. VANE ARM jj
APEX ROCK
Rn
EOTEXNON-WOVEN
TILE FABRIC
101011:
AM 7
r- APS 114 TO 113 ROC B'
DIAMETER IN HOOK
RUN NGLIDE
HEADER ROCK
FOOTER ROCK
-OFF SILL
0
-OFF SILL (TYP)
CUT-OFF SILL (TYP)�
PLAN VIEW 7
B-B'
PROFILE VIEW
J-Hook Structure Elevation Table
J H
J H-Step
J H
Apex Sta. (ft)
11+00
13+65
25+04
Downstream (Tie In) Sta. (ft)
11+44.5
14+09.5
25+48.5
Apex TW Elevation (ft)
2942.3
2938.6
2928.7
Apex Vane Elevation (ft)
2942.8
2938.7
2929.3
Apex BKF Elevation (ft)
2944.9
2941
2931.3
Downstream Tie -In Bkf Elevation (ft)
2944.7
2940.6
2931.2
Step Height
0.2
0.4
0.2
Structure Dimension Table - J Hooks and Cross Vanes
Parameter
Bankfull Width (ft)
54.0
1/3 Bankfull Width (ft)
16.2
Vane Arm Angle (deg)
20.0
Stream Length (ft)
44.5
Vane Arm Length (ft)
47.4
Vane Slope (%)
4.0
Vane Arm Height (ft)
1.9
Bankfull Max Depth (ft)
2.4
Step Height (fit)
0.2-0.4
Sheet
511

MATERIAL NOTES:
1. ROCK DIMENSIONS SHALL BE 1'-2' THICK, 2'-3' WIDE, AND 3'-5'
LONG.
2. ROCK SHALL BE LOCALLY HARVESTED NATIVE STONE.
3. THE ROCKS SHOULD BE RECTANGULAR OR NEARLY SO AT THE
ROCK TO ROCK CONTACT. THE ROCK TO ROCK CONTACT
SHOULD BE SOLID. IF ROCKS ARE NOT PERFECTLY FLAT, THE
THICKER END SHOULD BE PLACED DOWNSTREAM.
CONSTRUCTION NOTES
1. STRUCTURE DIMENSION, ELEVATOR, AND LOCATION DETAILS
PROVIDED IN TABLES.
2. CONSTRUCTION SHALL BEGIN WITH THE INSTALLATION OF THE
VANE ARM PORTIONS OF THE STRUCTURE INCLUDING HEADER
AND FOOTER ROCKS.
3. ARM ANGLE AND SLOPE WILL BE STAKED OUT OR VERIFIED BY
CONSTRUCTION OVERSIGHT STAFF PRIOR TO CONSTRUCTION.
4. GEOTEXTILE CLOTH WILL BE PLACED AGAINST THE OUTSIDE EDGE
OF THE THE VANE ARM BOULDERS.
5. THE VANE ARM CUT-OFF SILLS WILL BE CONSTRUCTED
PERPENDICULAR TO THE ARM ANGLE TO PREVENT THE
FORMATION OF A CUTOFF CHANNEL.
6. IN THE CENTER (CROSS) PORTION THE HEADER ROCKS SHALL BE
PLACED SO THAT THE TOP OF THE FOOTER ROCK IS AT AN
ELEVATION EQUAL TO THE PROPOSED BED ELEVATION.
7. GEOTEXTILE FABRIC SHALL BE PLACED ALONG THE ARM TRENCH
WITH APPROX. 2 FT. OF OVERLAP.
8. ROCK FILL MATERIAL SHALL BE BACK FILLED AROUND THE FABRIC.
9. THE HEADER ROCKS ON THE VANE ARM PORTION SHALL BE
PLACED SO THAT THEY SLOPE UP FROM THE BED ELEVATION AT
THE CROSS PORTION, TO A BANKFULL ELEVATION AND MEET THE
BANK AT A 150-220 ANGLE.
FOOTER ROCK(S) �� e
ROCK CROSS -VANE STRUCTURE
FLOW
113 113 113
APEX ROCK B
15°-22°
CUT-OFF SILL (TYP)
SURFACE ROCK
NOTE:
POOL STEP OMITTED FOR CLARITY
GAPSa--
ROCK DIAMETER
)NE AND COBBLE
ROCK
n
A
3
Cross Vane Structure Elevation Table
CV
CVNS
CV
Apex Sta. (ft)
3+03
6+87
18+12
Downstream Sta. (ft)
3+47.5
7+31.5
18+56.5
Apex TW Elevation (ft)
2946.4
2944.9
2932.4
Apex Vane Elevation (ft)
2946.5
2945
2932.5
Apex BKF Elevation (ft)
Downstream Tie -In Bkf Elevation (ft)
2948.8
2948.4
2947.3
2946.9
2934.82
2934.4
Step Height
0.2
0.2
0.2
SET TOP OF FOOTER TO
MATCH THALWEG ELEVATION
A -A'
CROSS-SECTION
NOTE:
DETAIL 13ASED ON SIMILAR
DETAIL BY ROSGEN.
WILDLAND HYDROLOGY, 2013
FLOW
ROCK
Structure Dimension Table -1 Hooks and Cress Vanes
Parameter
Bankfull Width (ft)
54.0
1/3 Bankfull Width (ft)
16.2
Vane Arm Angle (deg)
20.0
Stream Length (ft)
44.5
Vane Arm Length (ft)
47.4
Vane Slope (%)
4.0
Vane Arm Height (ft)
1.9
Bankfull Max Depth (ft)
2.4
Step Height (ft)
0.2-0.4
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Sheet
B-B' 611
PROFILE VIEW

SINGLE ROCK VANE STRUCTURE
CONSTRUCTION NOTES:
1.
THE LOWER ROCK (HEAD ROCK) FOOTER WILL FIRST BE PLACED
FOLLOWED BY THE HEAD ROCK TO SET THE INITIAL STRUCTURE
ELEVATION.
MATERIAL NOTES:
2.
THE SUBSEQUENT ROCK (MOVING UPSTREAM) AND ASSOCIATED
1. ROCK DIMENSIONS SHALL BE APPROXIMATELY 1'-2' THICK, 2'-3'
FOOTERS WILL THEN BE SET SIGHTING THE PROPOSED 20-30° BANK
WIDE, AND 3'-5' LONG.
DEFLECTION LINE.
2. ROCK SHALL BE NATIVE STONE HARVESTED LOCALLY OR FROM
3.
ROCK PLACEMENT FOLLOWS MOVING UPSTREAM AT 2-7% SLOPE
EXISTING STREAM.
UNTIL A BANKFULL ELEVATION IS REACHED AT THE END OF THE
3. THE ROCKS SHOULD BE RECTANGULAR OR NEARLY SO AT THE
STRUCTURE WING.
ROCK TO ROCK CONTACT. THE ROCK TO ROCK CONTACT
4.
A ROCK SILL WILL THEN BE CONSTRUCTED PERPENDICULAR TO THE
SHOULD BE SOLID. IF ROCKS ARE NOT PERFECTLY FLAT, THE
STRUCTURE ANGLE TO PREVENT THE FORMATION OF A CUTOFF
THICKER END SHOULD BE PLACED DOWNSTREAM.
CHANNEL.
5.
A TRENCH SHALL BE DUG UPSTREAM ON THE BANKSIDE OF THE
WING WHERE NON -WOVEN GEOTEXTILE FABRIC WILL BE PLACED
WITH APPROX. 2' OF OVERLAP
6.
BACKFILL TRENCH WITH NATIVE MATERIALS AND RE -VEGETATE.
114-113 Ba
FLOW
PI AN 1/TPA/
A -A'
CROSS-SECTION
TIVE STONE AND COBBLE
HEADER ROCK
FOOTER
2%-7%
GEOTEXTILE
FABRIC
B-B'
PROFILE VIEW
YP)
Single Rock Vane Structure Elevation
Table
SRV
SRV
Apex Sta. (ft)
21+62
22+45
Downstream Sta. (ft)
21+75.5
22+58.5
Apex TW Elevation (ft)
2929.4
292.8.9
Apex Vane Elevation (ft)
2931
2.930.7
Apex BKF Elevation (ft)
2932.8
2932.5
Downstream Tie -In Bkf Elevation (ft)
2932.8
2932.5
Structure Diimension Table - Single Rock Vane
Parameter
Bankfull Width (ft)
54.0
1/4 Bankfull Width (ft)
13.5
Vane Arm Angle (deg)
20.0
Stream Length (ft)
37.1
Vane Arm Length (ft)
39.5
Vane Slope %
4.6
Vane Arm Height (ft)
1.8
Bankfull Max Depth (ft)
2.4
w
heet
711

CONSTRUCTION NOTES:
1. A TRENCH SHALL BE DUG IN A M
FOOTER ROCKS ARE BURIED BENT
SURFACE ELEVATION.
2. ROCKS ARE PRECISELY PLACED b
THUMB.
3. FOOTER ROCKS SHALL BE PLACED FIRST WITH
HEAD ROCKS PLACED ON TOP PRIOR TO
BACKFILLING THE TRENCH.
4. IN THE CENTER (FLAT) PORTION THE HEADER
ROCKS SHALL BE PLACED SO THAT THE TOP OF
THE HEAD ROCK IS AT AN ELEVATION 0.2' GREATE
THAN THE PROPOSED BED ELEVATION.
5. GEOTEXTILE FABRIC SHALL BE PLACED IN THE
DOWNSTREAM PART OF THE TRENCH WITH
APPROX. 2 FT. OF OVERLAP.
6. ROCK FILL MATERIAL SHALL BE BACK FILLED
AROUND THE FABRIC.
7. THE HEAD ROCKS ON THE WING PORTIONS SHALL
BE PLACED SO THAT THEY SLOPE UP FROM 0.2'
ABOVE THE BED ELEVATION TO A BANKFULL
ELEVATION EQUAL TO 112 OF THE BANKFULL
ELEVATION AND MEET THE BANK AT A 20°-30°
ANGLE.
S. HEAD AND FOOTER ROCKS AT BOTH ENDS SHALL
BE TIED IN SECURELY TO THE BANK TO ELIMINATE
THE POSSIBILITY OF WATER DIVERSION.
SINGLE WING DEFLECTOR STRUCTURE
�n
'FULL DEPTH
COBBLE
PLAN VIEW
R HEAD ROCK
113 OF ROCK WIDTH FOR (0.2' ABOVE CREEK BED)
HEAD ROCK SETBACK BANKFULL
CREEK BED
y
112 BANKFULL
BACKFILL WITH RIVER COBBLE
NON -WOVEN
FOOTER ROCK GEOTEXTILE FABRIC
A -A'
CROSS-SECTION
WING INTO TOP OF HEAD ROCK IN FLAT
TIE END OF WI
BANK AT NG INTO
SECTION 0.2' ABOVE CREEK BED HEAD ROCK
4! 10% 40110%
CREEK BED FOOTER ROCK
R-R'
NKUr1Lr V1rvV
GEOTEA
(UNDER ROCK, UPSTR
FLOW
ROCK SILL (FOOTER BELOW SCOUR DEPTH)
CROSS-SECTION
ROCK
NOTES:
1. THE ROCKS SHOULD BE RECTANGULAR OR NEARLY SO AT
THE ROCK TO ROCK CONTACT.
2. THE ROCK TO ROCK CONTACT SHOULD BE SOLID.
3. IF ROCKS ARE NOT PERFECTLY FLAT, THE THICKER END
SHOULD BE PLACED DOWNSTREAM.
4. ROCKS SPECIFIED FOR THIS STRUCTURE SHALL HAVE
MEDIAN DIAMETER OF 3'
PROFILE VIEW
LINER
X, UPSTREAM FACE)
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Sheet
811