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Highway North Carolina Department of Transportation 4
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y Highway Stormwater Program
..
STORMWATER MANAGEMENT PLAN
(Version 2.07;Released October 2016) FOR NCDOT PROJECTS
WBS Element: 17.BP.11.R.131 TIP No.: SF-040122 County(ies): Ashe Pa e 2 of 8
General Project Information I ■
WBS Element: 17.BP.11.R.131 ITIP Number: SF-040122 Project Type: Bridge Replacement Date: 6/30/2021
NCDOT Contact: Marc Shown,PE Contractor/Designer: RK&K-Jonathan Whittington,PE
Address: 1590 Mail Service Center Address: 8601 Six Forks Rd
Raleigh,NC 27699-1590 Forum 1,Suite 700
Raleigh,NC 27615
Phone: [phone] Phone: [phone]
Email: [e-mail] Email:[e-mail]
City/Town: Weavers Ford County(ies): Ashe Ir
River Basin(s): New CAMA County? No
Wetlands within Project Limits? No
4 Project Descriptioll
Project Length(lin.miles or feet): 635 ft.(0.120 mi.) Surrounding Land Use: Rural
Proposed Project 11116111 Existing Site
Project Built-Upon Area(ac.) 0.3 ac. 0.3 ac.
Typical Cross Section Description: 2-lanes at 10'each with 3'unpaved shoulders One approx.15'-20'gravel roadway with 1'unpaved shoulders
Annual Avg Daily Traffic(veh/hr/day): Design/Future: 200 Year:2016 Existing: 200 Year: 2016
General Project Narrative: This project replaces existing bridge#040122: 1@19'-7",1@20'-9",4@45'-0",1@21'-10",1@18'-6",for an overall length of 260'-8". The bridge consists of a timber floor on
(Description of Minimization of Water steel girder floor beams,and is 12.17'wide out-to-out. The proposed bridge will be 270'long with a span arrangement of 3@90'utilizing 33"box beams,with spill through
Quality Impacts) abutments,and 30'wide out to out. No deck drains will be required. One causeway phase will be required to construct the proposed bridge,and two additional causeway
phases will be required to demolish the existing bridge. Runoff from the bridge will be captured and discharged onto Class B rip rap outlet pads.There is a slight increase in the
impervious area of the project,however there is no significant increase in the discharge from the roadway runoff.
Waterbody Information
Surface Water Body(1): North Fork New River NCDWR Stream Index No.: 10-2-(21.5)
NCDWR Surface Water Classification for Water Body Primary Classification: Class C
Supplemental Classification: (ORW)
Other Stream Classification: None
Impairments: None
Aquatic T&E Species? No Comments:
NRTR Stream ID: Buffer Rules in Effect: N/A
Project Includes Bridge Spanning Water Body? Yes Deck Drains Discharge Over Buffer? N/A Dissipator Pads Provided in Buffer? N/A
Deck Drains Discharge Over Water Body? No (If yes,provide justification in the General Project Narrative) (If yes,describe in the General Project Narrative;if no,justify in the
(If yes,provide justification in the General Project Narrative) General Project Narrative)

WETLAND PERMIT IMPACT SUMMARY
WETLAND IMPACTS SURFACE WATER IMPACTS
Hand Existing Existing
Permanent Temp. Excavation Mechanized Clearing Permanent Temp. Channel Channel Natural
Site Station Structure Fill In Fill In in Clearing in SW SW Impacts Impacts Stream
No. (From/To) Size/Type Wetlands Wetlands Wetlands in Wetlands Wetlands impacts impacts Permanent Temp. Design
(ac) (ac) (ac) (ac) (ac) (ac) (ac) (ft) (ft) (ft)
1 -L-10+48 to 12+48 Bridge Crossing 0.01 0.21 54 8
TOTALS*: I 0.01 0.21 54 8 0
"Rounded totals are sum of actual impacts
NOTES:
1) Permanent Impacts from the bridge crossing include 54'of new bank stabilization. This impact does not include rip rap placed where the old NC DEPARTMENT OF TRANSPORTATION
bridge bents were located,since this portion of the river bank was already hardened. DIVISION OF HIGHWAYS
2) The 8'of temporary impacts from the bridge crossing are due to Causeway Phases I,II,and Ill,and represent the portion of the causeway located 6/26/2021
beyond the area impacted by bank stabilization. Ashe County
3) Tree Clearing=0.062 acres(areas where trees are>3"DBH) 17.BP.11.R.131
SF-040122
Revised September 2014 SHEET 3 OF 8

TEMPO II' II'� Y WORK PAD DETAIL
NOT TO SCALE
WIDTH OF BRIDGE + 2' EACH END
FLOW
CLASS B RIP RAP
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V
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CLASS II RIP RAP
GEOTEXTILE
CHANNEL BED FABRIC
NATURAL GROUND
CAUSEWAY TOP CL OF PROPOSED
ELEV. 2475.5' v" INTERIOR BENT
CLASS B RIP RAP 4.5'
_
Ma'T'T/T'T'�����T'T/?/T'T/T'T'�/�'T'�/T'T/T1b 1.0' NWS EL.
vat *Atiiti�ti��i�iti��i��ti�tiAtiAti r4PA`o rAti��iritii'pi7r4 =2 4 7 3.4'
igiuggurgiuggegsmok
CHANNEL BOTTOM
APPROX. EL. = 2,470.0'
GEOTEXTILE CLASS II RIP RAP
FABRIC
O
LL
NCDOT
DIVISION OF HIGHWAYS
ASHE COUNTY
PROJECT:17.BP.11.IR.131 (040122)
eRIDGE NO.122 OVER
NO EFO I'I( NEW RIVET"
ON SI* 1549 (GARVEY BRIDGE I"D)
SHEET 4 OF 8 %19%2021

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# 78P.1/.R.13/ 05
STA.II+74.12 OFFSET = 47.097'LT -
-Y-
o' • RR SPIKE IN 30"SYCAMORE —I — PAY SHEET NO.
EL = 2,481,52' ` ROADWAY DESIGN HYDRAULICS
ENGINEER ENGINEER
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PERMIT DRAWING
G,N GRA/ SHEET 7 OF 8
d - Ja./1+03.' ■iiii■■■iiiiiiiiiiiiiiiii■PI= 13+80.00 •■■■■■■iiiiiiiiiiiiiiiiiii■-_ ■ ■■■■■■■■■
- 2,492.22' /// ■iiii■■■iiiiiiiiiiiiiiiii■ ■■■■■■iiiiiiiiiiiiiiiiiii■_�■ ■■■■■■■■■
.,0; ■iiii■■■iiiiiiiiiiiiiiiii■EL = 2,489.88' ■■■■■■iiiiiiiiiiiiiiiiiii■ ■ ■■■■■■■■■
■=■■ VC = 60' ■■■■ ■ ■■■■■■■■■
-■_■■� ■■■ / ''� / ■ ■■■■■■■■■
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-0 •�:: BRIDGE HYDRAULIC DATA I BLOCKED AREA = 243.1 SF
t I, • STR •040/22 Sto.I/#66A -L-
.' •
111 ,r NWS RIVER FLOW AREA = 515.0 SF
11— ■■■■ IY■■ DESIGN FREQUENCY = 25 YRS ■
i ■■■■ =■■� DESIGN DISCHARGE = 2/,000 CFS ; PERCENT OF RIVER AREA BLOCKED = 47.2%
2480 „ IIIIMMIll■ DESIGN HW ELEVATION = 2.485.5 FT 2480
ihs /100I00 YEARYEAR DISCHARGEFREQUENCY == l3300.000 CFS ■ ■■■■■■■■■■■■■■■■
4 U'C YRS ■ ■■■■■■■■■■■■■■■■
���_ ElIP �r 1■11_ I00 YEAR HW ELEVATION = 2,489.4 FT ■ ■■■■■■■■■■■■■■■■
Virgil
��. Pi OVERTOPPING FREQUENCY= 100+ YRS ■ ■■■■■■■■■■■■■■■■
u1��1�i�i �w �� OVERTOPPING DISCHARGE= 40000 CFS ■ ■■■■■■■■■■■■■■■■
�, ���jj /, �r ■ ■■■■■■■■■■■■■■■■
y1J� ��iTr� ��� I OVERTOPPING ELEVATION = 2,49/.4 FT ■ ■■■■■■■■■■■■■■■■
.!wn jrw�:7"21. .gif ■-■■— NORMAL WATER SURFACE ELEV = 2,473.4 FT■ ■■■■■■■■■■■■■■■■
2470 - �IIII III DATE OF SURVEY = 4/14/2016 I IlIlIllIllIllIll 2470
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11+00 12+00 13+00 14+00 15+00
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P1= 13+85.00 PI= 10+35.00
P1= 13+25.00 EL = 2,490.63'IEL = 2,493.37' VC = 60' EL = 2,492.05'
VC = 60' K = /p VC = 20'
K = 4 V = lSMPH BEGIN GRADE K = 2
2500 V = 15MPH 3/?I S a.I0+t�;CO V = I4MPH 2500
N END GRADE cL = 2.49J.44'
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Pt= 12+20.00 -!- EL = 2,491.08'
EL = 2,483✓3'
O VC =
i K = 9 �7 ®�■ \-45:.93i - " +)I
BEGIN GRADE - {'---- (+,1.5 + f j p7:� °°`' 2490
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EL = 2,482,229' ,-
_ EFGIN SP.CUT V O;TCH
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_____ _-c`, ELEV.2490_34 I/ID GRAD'
2480 -�F END SP.CUT V DITCH _DPI Sto 13 20..33 2 LT
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0
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o'm PROJECT REFERENCE NO. SHEET NO.
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EXISTING BRIDGE CL ROADWAY DESIGN EET NO. HYDRAULICS
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071-rR
2490
2490 — --- I, 89.1 ---- --____7_-—-----
/ { I { TI I CAUSEWAY PHASE II
{ I BLOCKED AREA = 221.9 SF
I I { I i/ NWS RIVER FLOW AREA = 464.8 SF
2480 I I )/ PERCENT OF RIVER AREA BLOCKED = 47.7% 2480
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--� --- -- -- r - F --I - CAUSEWAY PHASE III
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I { I // NWS RIVER FLOW AREA = 464.8 SF
2480 ` I 1 /)/ PERCENT OF RIVER AREA BLOCKED = 28.8% 2480
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