20200323 Ver 1_U-5794_SMP_20191003_20200303

Highway North Carolina Department of Transportation
=StOYC Highway Stormwater Program
= STORMWATER MANAGEMENT PLAN °
(Version 2.08; Released April 2018) 0 FOR NCDOT PROJECTS
WBS Element: 44365.1.1 TIP No.: U-5794 County(ies): Wilson Page 1 of 3
General Project Information
WBS Element:
44365.1.1 ITIP Number: U-5794 Project Type: RoadwayWidening Date: 9/17/2019
NCDOT Contact:
Jake Green, P.E.
Contractor / Designer:
Brian Steffen, P.E.
Address:
509 Ward Blvd.
Address:
SEPI Engineering & Construction
PO Box 3165
1 Glenwood Ave.
Wilson, NC 27895
Suite 600, Raleigh, NC 27603
Phone:
252-640-6420
Phone:
919-573-9919
Email:
'c reen ncdot. ov
Email:
bsteffen(a)sepiinc.com
City/Town:
Wilson
County(ies):
Wilson
River Basin(s):
Neuse
ICAMA County?
No
Wetlands within Project Limits?
Yes
Project Description JW
Project Length (lin. miles or feet):
3.654 mi. Surrounding Land Use: Forest, Agricultural, Residential
Proposed Project
Fandshoulders,
N11111 Existing Site
Project Built -Upon Area (ac.)
18.5 ac.
14.2 ac.
Typical Cross Section Description:
posed cross sections show Bloomery Rd. having a 12 ft. lane width with 2 lanes
The existing site has two 12 ft. lanes, existing roadway ditches. Lanes transition to 38
Packhouse Rd. has 2 and 3 lane sections with shoulders and curb and
ft. width toward end of project with curb and gutter and shoulders.
gutter, with a 12 ft. lane width. Sidewalks are also proposed on Packhouse Rd. near the
end of the project.
Annual Avg Daily Traffic (veh/hr/day):
Bloomery Road (-L-): 7,600
Bloomery Road (-L-): 4,300
Packhouse Rd. (-Y1-/-Y-): 6,700
Packhouse Rd. (-Y1-/-Y-): 3,800
Design/Future: Packhouse Rd. -Y- : 9,500 Year: 2040
Existing: Packhouse Rd. -Y- : 5,900 Year: 2021
General Project Narrative:
The U-5794 Wilson project encompasses Bloomery Road from US 246 Alt. to Packhouse Road and Packhouse Road to NC 58 (Nash St. SW). NCDOT proposes grading,
(Description of Minimization of Water
drainage, paving, and culvert construction improvements. Land use within the project corridor consists of mostly forest and agricultural land with rural residential land on the
Quality Impacts)
Bloomery Road end of the project. There is a school with adjacent residential neighborhood on Packhouse Road near the end of the project. The project study area lies within
the Bloomery and Toisnot Swamp sub -watersheds, which are in the Neuse River basin. The project is subject to the Neuse River Riparian Buffer Rules. Five jurisdictional
streams and three jurisdictional wetlands were identified within the project boundaries. Opportunities for swale treatment existed throughout the project given the current land
uses. Where practical, full treatment via swales has been provided. In the area where it wasn't practical, constraints to treatment are described in detail in the "Additional
Comments" section of the swales section of the Stormwater Management Plan. There are no impaired waters, High Quality Waters, and no Endangered or Threatened species
in the study area.
Waterbody Information
Surface Water Body 1): Bloome Swamp
NCDWR Stream Index No.:
27-86-6- 3
NCDWR Surface Water Classification for Water Body
Primary Classification:
Water Supply IV WS-IV
Supplemental Classification:
Nutrient Sensitive Waters NSW
Other Stream Classification:
None
Impairments:
None
Aquatic T&E Species?
No Comments:
NRTR Stream ID:
ISA(Bloomery Swamp Trib 3
Buffer Rules in Effect: Neuse
Project Includes Bridge Spanning Water Body?
INo
I Deck Drains Discharge Over Buffer? N/A
Dissipator Pads Provided in Buffer? N/A
Deck Drains Discharge Over Water Body?
I N/A
(If yes, provide justification in the General Project Narrative)
(If yes, describe in the General Project Narrative; if no, justify in the
General Project Narrative)
(If yes, provide justification in the General Project Narrative)

Highway
St[�rmwaY,
(Version 2.08; Released April 2018)
North Carolina Department of Transportation
Highway Stormwater Program
STORMWATER MANAGEMENT PLAN
FOR NCDOT PROJECTS
WBS Element: 44365.1.1 TIP No.: U-5794
County(ies): Wilson
Page 2 of 3
Additional Waterbody Information
Surface Water Body (2): Toisnot Swamp
NCDWR Stream Index No.:
27-86-11-(1)
NCDWR Surface Water Classification for Water Body
Primary Classification:
Water Supply III (WS-III)
Supplemental Classification:
Nutrient Sensitive Waters (NSW)
Other Stream Classification:
None
Impairments:
None
Aquatic T&E Species?
No Comments:
NRTR Stream ID:
ISC (Unnamed Trib to Toisnot Swamp), SD (Trib 1 to Toisnot Swamp Trib)
Buffer Rules in Effect: Neuse
Project Includes Bridge Spanning Water Body?
INo
I Deck Drains Discharge Over Buffer? N/A
Dissipator Pads Provided in Buffer? N/A
Deck Drains Discharge Over Water Body?
I N/A
(If yes, provide justification in the General Project Narrative)
(If yes, describe in the General Project Narrative; if no, justify in the
General Project Narrative)
(If yes, provide justification in the General Project Narrative)

Highway North Carolina Department of Transportation
Stormwater
Highway Stormwater Program
STORMWATER MANAGEMENT PLAN
(Version 2.08; Released April 2018) FOR NCDOT PROJECTS
WBS Element: 44365.1.1 TIP No.: U-5794 Count ies : Wilson Page 3 of 3
Swales
Sheet
No.
Station & Coordinates
(Road and Non Road
Projects)
Surface
Water
Body
Base
Width
ft
Front
Slope
H:1
Back
Slope
H:1
Drainage
Area
ac
Recommended
Treatm't Length
ft
Actual
Length
(ft)
Longitudinal
Slope
N
Q2
(cfs)
V2
(fps)
Q10
(cfs)
V10
(fps)
Rock
Checks
Used
BMP
Associated w/
Buffer Rules?
9
FROM -Y- STA. 41+10 RT
(1)Bloomery
Swamp
2.0
4.0
3.0
1.5
149
169
1.79%
3.2
2.0
4.1
2.1
No
Yes
TO -Y- STA. 43+00 RT
10
FROM -Y- STA. 47+15 RT
(1)Bloomery
Swamp
2.0
4.0
3.0
1.1
110
135
2.00%
3.8
1.1
4.8
1.2
No
Yes
TO -Y- STA. 49+50 RT
10
FROM -Y- STA. 47+85 LT
(1)Bloomery
Swamp
2.0
4.0
3.0
0.5
51
265
0.90%
1.5
1.3
1.9
1.4
No
Yes
TO -Y- STA. 50+50 LT
14
FROM -Y- STA. 103+50 RT
(2)Toisnot
Swamp
2.0
4.0
3.0
0.9
94
160
1.70%
2.6
1.9
3.4
2.0
No
Yes
TO -Y- STA. 104+98 RT
14
FROM -Y- STA. 106+40 LT
(2)Toisnot
Swamp
2.0
3.0
3.0
0.8
78
325
1.39%
2.1
1.7
2.8
1.8
No
Yes
TO -Y- STA. 110+25 LT
14
FROM -Y- STA. 106+25 RT
(2)Toisnot
Swamp
2.0
4.0
3.0
1.7
170
398
0.51 %
5.3
1.5
6.9
1.6
No
Yes
TO -Y- STA. 110+60 RT
16
FROM -Y- STA. 130+10 RT
(2)Toisnot
Swamp
2.0
4.0
3.0
3.5
351
508
0.50%
8.0
1.5
10.3
1.6
No
Yes
TO -Y- STA. 135+18 RT
16
FROM -Y- STA. 133+48 LT
(2)Toisnot
Swamp
4.0
3.0
3.0
2.8
279
297
0.96%
7.3
2.0
9.6
2.1
No
Yes
TO -Y- STA. 136+93 LT
Additional Comments
Recommended length was calculated based on total drainage area. Where practical, an effort was made to treat the total area on the project through grassed swales.