20211609 Ver 1_Updated_Restoration_Plans_Fig5_20211206

CONSTRUCTION PLANS
DAM REMOVAL AND STREAM RESTORATION
SPRINGS OF NORTH ASHEVILLE
BUNCOMBE COUNTY, NORTH CAROLINA
PREPARED FOR:
NSR Woodfin, LLC
18825 W Catawba Ave Suite 250
Cornelius, NC 28031
SHEET INDEX
1: TITLE
2: NOTES AND LEGEND
3: PLAN AND PROFILE
4: TYPICAL SECTIONS
5-6: DETAILS
SITE
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DESCRIPTION
REVISIONS
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DATE: DEC. 2021
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Figure 5
SHEET 1 OF 6

GENERAL NOTES:
1. EXISTING 1-FOOT CONTOURS DEVELOPED FROM 2016/17 BARE EARTH LiDAR DATA OBTAINED FROM NC ONEMAP. DATUM IS NAD 83.
2. EROSION AND SEDIMENT CONTROL PRACTICES MUST BE INSTALLED, INSPECTED AND MAINTAINED IN ACCORDANCE WITH FEDERAL, STATE AND LOCAL REGULATIONS.
3. ALL EQUIPMENT MUST BE CLEANED REGULARLYAND MAINTAINED TO BE FREE OF FUEL, OIL AND LUBRICANT LEAKS.
4. FUELING SHALL BE PERFORMED AT LEAST 100 FEET FROM OPEN OR FLOWING WATER.
5. THE CONTRACTOR SHALL PROTECT SITE FEATURES BEYOND THE LIMITS OF DISTURBANCE. CONTRACTOR SHALL REPAIR ANY DAMAGE TO SITE FEATURES TO PRE -PROJECT CONDITIONS.
6. WORK SHALL BE STAGED SUCH THAT NO MORE STREAM BANK IS DISTURBED THAN CAN BE STABILIZED WITH SEED, MULCH AND MATTING AT THE END OF EACH WORKDAY.
7. DISTURBED UPLAND AREAS MUST BE STABILIZED WITH SEED AND MULCH WITHIN 7 DAYS OF REACHING FINAL GRADES.
CONSTRUCTION SEQUENCE:
1. RESET TEMPORARY DEWATERING CULVERT 3 FEET LOWER THAN POND BED AND EXCAVATE SUMP UPSTREAM OF CULVERT TO PROMOTE DRAINAGE. INSTALL ROCK PIPE INLET PROTECTION
(NCDEQ STD. PRACTICE 6.55) UPSTREAM OF CULVERT INLET TO TRAP SEDIMENT. ALLOW POND TO DEWATER THROUGH CULVERT.
2. EXCAVATE DAM TO DESIGN GRADES, MAINTAINING FLOW IN DEWATERING CULVERT UNTIL GRADING REACHES THE DESIGN BED ELEVATIONS. HAUL SUITABLE MATERIAL TO UPLAND DISPOSAL
SITE. INSTALL SILT FENCES, WATTLES OR OTHER PRACTICES AS NEEDED TO PREVENT SOIL GENERATED DURING DAM REMOVAL FROM ENTERING THE STREAM.
3. WHEN CONDITIONS IN POND BED ALLOW, EXCAVATE STREAM CHANNELAND FLOODPLAIN BENCHES THROUGH POND BED. LEAVE 10 FOOT PLUG OF BANK MATERIALAT UPSTREAM END.
4. SEED, MULCH AND INSTALL EROSION CONTROL MATTING ON RESTORED CHANNEL BANKS. INSTALL IN -STREAM STRUCTURES. DEWATER RESTORED CHANNEL AS NEEDED AND DISCHARGE
TURBID WATER THROUGH SILT BAG.
5. INSTALL PUMP -AROUND UPSTREAM OF CHANNEL PLUG. EXCAVATE CHANNEL THROUGH PLUG, SEED, MULCH AND MAT BANKS THROUGH PLUG. TURN FLOW TO THE RESTORED CHANNELAND
DISMANTLE PUMP -AROUND.
6. INSTALL LIVE STAKES ON BANKS AND BARE ROOT TREES AND SHRUBS IN BUFFERS DURING THE NEXT DORMANT SEASON, GENERALLY DECEMBER THROUGH MARCH. TRANSPLANT ON -SITE
ALDER, WILLOW AND DOGWOOD SHRUBS AS AVAILABLE TO RESTORED BUFFER AREAS.
LEGEND
EXISTING PROPOSED
CONTOUR (1')
INDEX CONTOUR (5')
PARCELS
SANITARY SEWER
WETLAND
— 2450-
- E-SS - E-SS -
STREAM CENTERLINE
TOP OF STREAM BANK
VEGETATION PROTECTION
CONSTRUCTED RIFFLE
BOULDER STEP
TEMP. CULVERT
TEMP. ROCK PIPE INLET
PROTECTION
1..00
/1 NOT IN CONTRACT
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DESCRIPTION
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DATE: DEC. 2021
SCALE: AS SHOWN
NOTES &
LEGEND
SHEET2OF6

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-___ — ` / ,3' PROTECT VEGETATION
_____ --, BEYOND GRADING LIMITS
Impact 01
0.242 AC
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REVISIONS
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REV. PROF.
DESCRIPTION
' —_i;� _ 1 j c ' _ 'E r� GRADING LIMITS
I
-_. _ - - 4' I , s WITHIN POND BED DAM TO BE REMOVED
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BED AND BANKS TO ', •,�...
- EXISTING CHANNEL m m 8x50
, `•X00 8+00 \ UT TO WAGNER BRANCH ' \� CONFORM RESTORE S
7,+50 BED AND BANKS TO
- - . 6+50 _ 7±00 \
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`'
Impact W2 EXISTING CHANNE
0.125 AC
_ _ Impact W1 -- `� _s TEMP. DEWATERING CULVER
4
HEADWATERS
ENGINEERING
headwaters-eng.com
NCBELS Lic. No. C-4500
- 0.028 AC — E-sE _ ' _ ESE _- 36" SMOOTH WALL HDPE
,_ � EsE E-sE i E-sE ---__ TEMP. ROCK PIPE
1 / '-' ` ^ \ E-SE E- E-se NLET PROTECTION g-
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/ ---_ 1 E-SE E— E-SE _- -Ss
— s
0' 40' 80' 120' - -
DAM REMOVAL AND STREAM
RESTORATION
UT TO WAGNER BRANCH
SPRINGS OF NORTH ASHEVILLE
BUNCOMBE COUNTY, NC
ROCK PIPE
2130
GROUND SURFACE AT
2130
DESIGN CENTERLINE
INLET PROT.
POND BED
-
2125
-Ns
DAM • REMOVED BE
2125
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=_
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TEMP. DEWATERING
2120
2120
\
2115
-----
_
2115
2110
APPROX. BASE OF SEDIMENT
-
2110
DATE: DEC.2021
DESIGN PROFILE)
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SCALE: AS SHOWN
2105
___/2105
PLAN AND
PROFILE
2100 2100
7+00 7+50 8+00 8+50 9+00 9+50 10+00 10+50 11+00 11+50
SHEET 3 OF 6

RIPARIAN SEED MIX -APPLIED TO STREAM BANKS AND BUFFERS
Seeding Rate = 20 lb/acre
Mulching: wheat or oat straw mulch applied at 2 tons/acre
Common Name
Scientific Name
Percentage
Indiangrass
Sorghastrum nutans
20
Big Bluestein
Andropogon gerardi
20
Virginia Wildrye
Elymus virginicus
20
Soft Rush
Juncus effusus
20
Beaked Panicgrass
Panicum anceps
10
Fox Sedge
Carex vulpinoidea
10
TEMPORARY SEED MIX
Application Dates
Common Name
Scientific Name
Rate (lb/acre)
Applied
Separately
Rate (lb/acre) Applied
w/ Riparian Mix
August 15 to May 1
Rye Grain
Secale cereale
120
60
May 1 to August 15
Browntop Millet
Panicum ramosum
40
20
O4
SEED MIXES AND
BUFFER PLANTING
TREE AND SHRUB PLANTING (BARE ROOT OR 1 GAL)
COMMON NAME
SCIENTIFIC NAME
SPACING
(FEET)
River Birch
Betula nigra
12-18
Sycamore
Platanus occidentalis
12-18
Tag Alder
Alnus serrulata
8-12
Ninebark
Physocarpus opulifolius
8-12
Witch -hazel
Hamamelis virginiana
8-12
Pawpaw
Asimina triloba
12-18
Bitternut Hickory
Carya cardiformis
12-18
SEED, MATTING, LIVE STAKES,
TYP BOTH BANKS
10' BENCH NOTES:
1 (TYP)- HT
1 2.5 (TYP)
1 10 (TYP)
2.0'
3 (TYP)
H
1.7'
04
2 TYPICAL SECTION
POOL
CREST OF DAM
----- ------ EL. 2123.0' +/-N
----------------- -
SEED, MATTING, LIVE STAKES
TYP BOTH BANKS
LEGEND
EXISTING
PROPOSED
1.0'
3.0'
10' BENCH
(TYP)
10 (TYP)
r2TYP)
1. TYPICAL SECTIONS DRAWN LOOKING DOWNSTREAM.
2. BANKS AND GRADED SLOPES SHALL BE ROUGHENED PERPENDICULAR TO
SLOPE, COVERED WITH 3" LAYER OF TOPSOIL, SEEDED, MULCHED AND
MATTED WITH 780 G/M5 COIR FIBER MATTING.
3. BANKS SHALL BE LIVE STAKED AT 3' O.C. DURING THE DORMANT SEASON
FOLLOWING GRADING.
4. PLANT TREES AND SHRUBS ON BENCHES AND ADJACENT FLOODPLAIN
AREAS DURING THE DORMANT SEASON. SEE TABLES ABOVE FOR
SPECIES AND SPACING.
5. NURSERY STOCK MAY BE SUBSTITUTED WITH ON -SITE ALDER, DOGWOOD
AND WILLOW TRANSPLANTS.
c�EEO� 1
2.5 (TYP)
4 O TYPICAL SECTION
RIFFLE THROUGH DAM
0' 10' 20' 30'
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DATE: DEC. 2021
SCALE: AS SHOWN
TYPICAL
SECTIONS;
PLANTING SPECS
SHEET4OF6

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---°-I
SEE PLAN
PLAN
12" LAYER 57 STONE;
REMOVE ACCUMLATED
SEDIMENTAFTER EACH
RAIN EVENT
MIX OF CLASS 1 RIPRAP
AND ON -SITE COBBLE MIX CLASS 1 STONE
WITH ON -SITE GRAVEL
AND COBBLE
�1� CONSTRUCTED RIFFLE
NTS
MIN. 2 NODES ABOVE GRADE
3' IN DIAMOND PATTERN
_ 4/ HARD SOIL OR STONE MAY
1 1=1I I — / BE PRESENT SEE NOTE 1
I1—II —1I— 2'TOFIRSTROW
BASEFLOW W.S.
II=-111/ �a�
IIII I 1 _-.`.
III.�III �,�11
=1 I I-111-1I1=1 -
11 11-111-
LIVE STAKE .��
3 NODES MIN.
SECTION
LIVE STAKING
NTS
18" MIN.
SCARIFY SUBGRADE
PRIOR TO STONE
PLACEMENT
18" MIN.
SECTION A -A'
TOP CUT AT 15°
AFTER
INSTALLATION
1 /2" TO 2"
BASE CUT
AT 45 DEG.
LIVE STAKE DETAIL
LIVE STAKE NOTES:
1. FORM PILOT HOLE THROUGH HARD SOIL OR STONE TO PREVENT DAMAGE TO STAKE.
2. LIVE STAKE MIX TO INCLUDE AT LEAST TWO OF THE FOLLOWING SPECIES: SILKY
DOGWOOD, SILKY WILLOW, ELDERBERRY, NINEBARK, BUTTONBUSH.
3. LIVE STAKING SHALL BE DONE DURING THE DORMANT SEASON.
2.5'
10.5'
CLASS B RIPRAP
2.0'
EXCAVATE SUMP
UPSTREAM OF PIPE INLET
DAM
z CI /DEWATERING PIPE
SECTION THROUGH DAM
ROCK PIPE INLET PROTECTION
NTS
TOE OF BANK (TYP)
TOP O BANK (TYP)
ELEV. AT TIE -IN
APPROX. 1' HIGHER
THAN INVERT ELEV.
•
NOT
1. :OULDERS SHALL BE DURABLE STONE, MIN. 2'X3'X3' AND RELATIVELY FL
. DIMENSIONS AND NUMBER OF BOULDERS MAY BE ADJUSTED BASED ON
FIELD CONDITIONS.
I FLOW
NTS
STONE BAC ' ILL
OT SHO
FOR C ' ITY
ANCHOR 4' INTO BANK
HEADER
OOTER
EXCAVATED
SCOUR POOL
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DESCRIPTION
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REVISIONS
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DATE: DEC. 2021
SCALE: AS SHOWN
DETAILS
SHEET 5 OF 6

NON -WOVEN SILT BAG
1 10' MIN. FROM STREAM
a
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REVISIONS
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DESCRIPTION
TOP
MATTING PLACED FLUSH WITH BANK
OF BANK SURFACE, LAP OVER DOWN STREAM /
DOWN SLOPE SEAMS
1' MIN.
COBBL PAD OR
WOODEN PALLET
OUTLET SHALL BE WELL SILT BAG
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12" WOOD STAKE
3' O.C. DIAMOND
PLACED IN
PATTERN
MATTING ANCHORED 1'
CLASS A STONE AS NEEDED TO
PREVENT EROSION
DEWATERING PUMP
AS NEEDED
SILT BAG ON STONE PAD,
SEE DETAIL ABOVE; USE
MATTING SHALL BE
780 G/M2 COIR
BELOW STREAM BED
COFFER DAM;
SAND BAGS W/ PLASTIC
r ..,�1 ONLY IF DISCHARGE IS
_ ' - TURBID
REMOVE ALL DEBRIS,
SHEETING
PROTECT EXIST.
SCARIFY SURFACE, PLACE
TOPSOIL AND SEED/MULCH
BEFORE PLACING MATTING
BANK VEGETATION
FORADD'L FILTER
EROSION
CONTROL
MATTING
4
HEADWATERS
ENGINEERING
headwaters-eng.com
NCBELS Lic. No. C-4500
NTS
0
II1IORKAREA
wet
TOE OF BANK (TYP)IPJtJIIII-
_I
.mm
■r..
�_
8'
MAX.
TOP OF BANK (TYP)
STEEL T-POST
STEEL
T-POST
FILTER FABRIC
I '
WITH WIRE BACKING
I�
18" MIN.
DISCHARGE TO
COMPACTED BACKFILL
j
--
-
DIVERSION PUMP
VARIES STABLE STREAM
DAM REMOVAL AND STREAM
RESTORATION
UT TO WAGNER BRANCH
SPRINGS OF NORTH ASHEVILLE
BUNCOMBE COUNTY, NC
RUNOFF —
CREEK
SIDEo
Sew
_
e
SIZED FOR BASE
FLOW+30%
BED AREA
`NOTE:
_
-�H
-
_ FILTER FABRIC WITH
I III= WIRE BACKING
PROFILE
WORK AREA SHALL BE STABILIZED BY
THE END OF EACH WORK DAY.
8"
24" MIN.
HDPE SHEETING HELD
N PLACE ON TOP
4" NOTES:
1. SILT FENCE SHALL BE PLACED ON STREAM SIDE
WITH SAND BAGS �-
FLOW
BANK TO BANK
—
OF ALL STOCKPILES.
TOP OF BANK
SECTION
1 i
2. SILT FENCE SHALL BE REMOVED UPON
COMPLETION OF EARTHWORK.
MAX DEPTH -1' MAX DEPTH
STREAM BOTTOM +
3. WIRE BACKING SHALL BE 14 GAUGE WITH
MAXIMUM MESH SPACING OF 6".
I PROFILE SECTION
4. IMMEDIATELY REPLACE DAMAGED FABRIC.
5. REMOVE ACCUMULATED SEDIMENT BEFORE HALF
COFFER DAM
OF THE SILT FENCE CAPACITY IS REACHED.
SILT FENCE
3 PUMP -AROUND SCHEMATIC
DATE: DEC. 2021
SCALE: AS SHOWN
DETAILS
6 NTS
6 NTS
SHEET 6 OF 6