20200546 Ver 1_2 - Stream Impacts Rev_20200508

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_SS_ —
POTENTIAL NPDES PHASE II 1 `
30' AQUATIC BUFFERS IMPACT #1A
/ PERMANENT STREAM IMPACT
PROPOSED CULVERT
8 LF (28 SF)
IMPACT #1 B
PERMANENT STREAM IMPACT
CONSTRUCTED RIPRAP CHANNEL
31 LF (84 SF)
IMPACT #1-
30' PERMANENT STREAM IMPACT
39 LF (112 SF)
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IMPACT #2
TEMPORARY STREAM IMPACT
2 LF (6 SF)
I
I
30' EXISTING TOP OF BANK
I`
PROPOSED TOP OF BANK
CONSTRUCTED CHANNEL GRADED TO MATCH
EXISTING NATRUAL CHANNEL GEOMETRY AND INVERT
OF CULVERT PLUS 1' FOR CULVERT EMBEDMENT.
°
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�B
\ \/ G° /
IMPACT #3A
° \ PERMANENT STREAM IMPACT
PROPOSED CULVERT
— — — — — 11 LF (40 SF)
EXISTING STONE HEADWALLS —
(TO BE REMOVED)
EXISTING (2) 24" CMP CULVERTS
�. (TO BE REMOVED) /
ii/ ss-
CHANNEL TO BE STABILIZED WITH RIPRAP
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I SS
I _ -
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SS
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PROPOSED 42" HDPE CULVERT
(EMBED 1' FOR AQUATIC PASSAGE)
PROPOSED PRE -CAST HEADWALLS
(NCDOT STANDARD 838.80)
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STOP
STREAM I M PACTS
IMPACT #
PERMANENT
TEMPORARY
1
39 LF (112SF)
---
2
---
2 LF (6 SF)
3
52 LF (176 SF)
---
4
---
5 LF (30 SF)
IMPACT#3B
PERMANENT STREAM IMPACT
RIPRAP ENERGY DISSIPATOR — -
41 LFy(136 SF) -77
IMPACT #3
PERMANENT STREAM IMPACT
52 LF (176 SF)
IMPACT #4 \
TEMPORARY STREAM IMPACT
5 LF (30 SF)
EXISTING TOP OF BANK
LIMITS OF DISTURBANCE
V:/-/ Z_�'z
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--- - PROPOSED GRADE _ EXISTING GRADE
IS, 1 2 PROPOSED GRADE
EXISTING GRADE
CLASS'1' RIPRAP ARMORING T010 YR ENERGY DISSIPATOR
GRAPH I C SCALE PROPOSED CHANNEL O O BACKWATER ELEVATION+ 1' (-2154.0) CLASS'2' RIPRAP \ /
200 0 100 200 400 WIDTH TO MATCH EXISTING OO O
(TYPICAL 34')
1 inch = 200 Ft. UPSTREAM CHANNEL RELOCATION - TYPICAL CROSS-SECTION ENERGY DISSIPATOR - TYPICAL CROSS-SECTION
NOTE: 5' CONTOURS PER BUNCOMBE COUNTY GIS DEPARTMENT N.T.S. N.T.S.
No. Revision Date B Den r Scale III\/ WithersRavenel dliersRavenel AS NOTED sneer No.
Drawn By WRP Date 05,D5,2D2D KENILWORTH RD - CULVERT REPLACEMENT STREAM IMPACT MAP 1/ Engineers I Planners I Surveyors 2
Checked By Job No. 115 MacKenan Drive Cary, NC 27511
TB 08181125.0 Asheville Buncombe County North Carolina t:919.469.33401 license #:C-08321 ovwov.withersravenel.com