20150598 Ver 1_Plans_20150616

North Carolina Department of Transportation
Highway Stormwater Program
STORMWATER MANAGEMENT PLAN
(Version 1.2; Released July 2012)FOR LINEAR ROADWAY PROJECTS
Project/TIP No.:17BP.4.R.56County(ies):Wayne Page 1of 1
General Project Information
Project No.:17BP.4.R.56Project Type:Date:
Bridge Replacement5/21/2015
NCDOT Contact:Contractor / Designer:
Chad CogginsWetherill Engineering, INC
Address:Address:
Highway Division 4Wetherill Engineering, INC
509 Ward Blvd., P0 BOX 3165559 Jones Franklin Road, Suite 164
Wilson, NC 27895Raleigh, NC 27606
Phone:[phone]Phone:[phone]
Email:Email:[e-mail]
[e-mail]
City/Town:N/ACounty(ies):Wayne
River Basin(s): NeuseCAMA County?
No
NCDWQ Stream Index No.:
Primary Receiving Water: Bear Creek27-72-(0.1)
Primary:
Class C
NCDWQ Surface Water Classification for Primary Receiving Water
Supplemental:
Nutrient Sensitive Waters (NSW)Swamp Waters (Sw)
Other Stream Classification:
303(d) Impairments:biological impairment
Buffer Rules in EffectNeuse
Project Description
Rural (Residential)
Project Length (lin. Miles or feet): Surrounding Land Use:
0.07
Proposed ProjectExisting Site
Project Built-Upon Area (ac.)
0.60ac.0.52ac.
(2) 11' lanes with grassed shoulders and up to 4.25' shoulders with guardrail. 4.25' (2) 10' lanes with grassed shoulders
Typical Cross Section Description:
shoulders are variable width paved.
Average Daily Traffic (veh/hr/day):
Design/Future:1550 (2013)Existing:1100 (2012)
Replace bridge no. 14 over Bear Creek on SR 1714 (Parkstown Rd.). Use 1 @70 24" Cored Slab Bridge. Two TB 2GI will outlet outside the buffer zone with 15" CSP with
General Project Narrative:
Class B rip rap is used to stabilize the outlet. The proposed grassed swale special lateral 'V' ditch begins at Sta -L-11+50 (RT) to Sta -L- 13+00 (RT) and from Sta -L-13+50
(LT) to Sta -L- 14+25 (LT). The proposed grassed swale special lateral 'Base' ditch begins at Sta -L-11+50 (LT) to Sta -L- 13+00 (LT) and from Sta -L-13+50 (RT) to Sta -L-
14+00 (RT). The proposed grassed swale tie into the existing ditches at Sta -L-11+50 (LT,RT) and Sta -L-14+50 (LT,RT). Rip rap at embankment will be used at the outlet of
all the ditches at Sta -L-13+00 (LT,RT) to Sta -L- 13+20 (LT,RT) and at Sta -L-13+30 (LT,RT) to Sta -L- 13+50 (LT,RT) . All proposed grassed swales meet the design criteria
for a grassed swale. No deck drains required.
References

North Carolina Department of Transportation
Highway Stormwater Program
STORMWATER MANAGEMENT PLAN
(Version 1.2; Released July 2012) FOR LINEAR ROADWAY PROJECTS
Project/TIP No.:
17BP.4.R.56County(ies):Wayne Page of 1
Swales
Stream Drainage Recommended Actual Longitudinal Rock
Sheet StationCrossing Base WidthFront SlopeBack SlopeAreaTreatment LengthLengthSlopeQ2V2Q10V10Checks
No.(From / To)Station(ft)(H:V)(H:V)(ac)(ft)(ft)(%)(cfs)(fps)(cfs)(fps)Used
-L- 11+50 LT
4.03:13:110.881088150 *7.92.010.22.2
2.09%
-L- 13+00 LT
-L- 11+50 RT
0.03:11.251501.19%2.51.6
3:11253.21.7
-L- 13+00 RT
-L- 13+50 LT
0.03:13:10.78781.48%1.61.5
1002.01.6
-L- 14+50 LT
-L- 13+50 RT
3.03:16.00600100 *7.02.04%2.0
3:19.02.1
-L- 14+50 RT
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Have minimum design criteria, as presented in the NCDOT Best Management Practices Toolbox, Version 1 (March 2008), been met and verified? If No,
YESNO
provide further explanantion of why design criteria was not met.
Additional Comments
* Per Chad Coggins, swale recommended treatment length is based on the increase in impervious area in the vicinity of the project. Hence, the swale length of 150' and 100' satisfies
design criteria for
a grassed swale.

WETLAND PERMIT IMPACT SUMMARY
WETLAND IMPACTSSURFACE WATER IMPACTS
Hand
Existing Existing
PermanentTemp. ExcavationMechanized ClearingPermanent Temp. ChannelChannelNatural
SiteStationStructureFill InFill Inin Clearingin SW SWImpactsImpactsStream
No.(From/To)Size / TypeWetlandsWetlands Wetlandsin Wetlands WetlandsimpactsimpactsPermanentTemp.Design
(ac)(ac)(ac)(ac)(ac)(ac)(ac)(ft)(ft)(ft)
112+90 TO 13+60 -L-BRIDGE 140.0165
TOTALS:0.0165
NC DEPARTMENT OF TRANSPORTATION
DIVISION OF HIGHWAYS
Wayne / Greene County
WBS -17BP.4.R.56 (DB4B-950014)
Brg. #14 over Bear Creek on SR 1714 (Parkstown Rd.)
SHEET 5 of 55/21/2015

ATN Revised 3/31/05

BUFFER IMPACTS SUMMARY
IMPACT
BUFFER
REPLACEMENT
TYPEALLOWABLEMITIGABLE
ZONE 1ZONE 2TOTALZONE 1ZONE 2TOTALZONE 1ZONE 2
ROADPARALLEL
STRUCTURE SIZE / STATION
22222222
CROSSINGBRIDGEIMPACT(ft)(ft)(ft)(ft)(ft)(ft)(ft)(ft)
SITE NO.TYPE(FROM/TO)
Sheet 4A70' BRIDGE (14)12+90 TO 13+60 LT.X29863823368
Sheet 4A70' BRIDGE (14)12+90 TO 13+60 RT.X194701947
1ROAD12+62 TO 12+90 LT.X153609762
1ROAD13+60 TO 13+88 LT.X7813801458
1ROAD12+68 TO 12+90 RT.X51681732
1ROAD13+60 TO 13+89 RT.X214645859
TOTAL:
542936979126
N.C. DEPT. OF TRANSPORTATION
DIVISION OF HIGHWAYS
Wayne / Greene COUNTY
WBS-17BP.4.R.56 (DB4B-950014)
Brg. #14 over Bear Creek on SR 1714 (Parkstown Rd)
SHEET 5 OF 55/21/2015
Rev. May 2006