R-5777C Stormwater Management Plan.pdf

Submittal February 6, 2024
HlghWay
tP,Y
North Carolina Department of Transportation �4't
Highway Stormwater Program
STORMWATER MANAGEMENT PLAN
(version 3.00; Released August 2021)
FOR NCDOT PROJECTS
WBS Element: 44648.3.4
TIP/Proj No: R-5777C County(ies): Craven Page 1 of 5
General Project Information
WBS Element:
44648.3.4 ITIP Number: R-5777C Project Type: Roadway Widening Date: 12/19/2023
NCDOT Contact:
Byron Kyle
Contractor / Designer:
Sun ate Desi n Group, PA
Address:
1020 Birch Ridge Dr
Address:
905 Janes Franklin Rd
Room #16
Raleigh, NC 27606
Raleigh, NC 27610
Phone:
919-707-6621
Phone:
919-710-8459
Email:
btk le ncdot. ov
Email:
belam sun atedesi n.com
City/Town:
Havelock
Coun ies :
Craven
River Basins :
Neuse
CAMACounty?
Yes
Wetlands within Project Limits?
Yes
Project Des cri tion
Project Length lin. miles or feet):
6.54 SurroundingLand Use: Residential, Commercial, Agricultural, National Forest
Proposed Project
Existing Site
Project Built -Upon Area ac.
116.3 1 ac.
84.0 lac.
Typical Cross Section Description:
US 70 (-L-): Grassed Swale median with 4:1 max side slopes (6:1 max on Guiderail Side).
Existing US 70: Grassed Swale median. 2-12' paved lanes with 4' paved shoulders in
2-12' paved lanes with 12' outside shoulders (10' Paved, 2' Grassed) and 6' inside
each direction. Varying fill and cut slopes.
shoulders (4' Paved, 2' Grassed) in each direction. Varying fill and cut slopes. See project
XSC's for detailed information.
Annual Avg Daily Traffic (veh/hr/day):
Design/Future: 41,800 1 Year: 2045
Existing-.T 31,800 Year: 2019
General Project Narrative:
The North Carolina Department of Transportation (NCDOT) has proposed improvements of existing US 70 in Craven County to interstate standards from the Havelock Bypass to
(Description of Minimization of Water
east of S.R. 1116 (Thurman Road). The project, R-5777C, has 6 proposed major structures, 4 along US 70 and 2 on adjacent service roads. All major drainage structures on this
Quality Impacts)
project are reinforced concrete box culverts, 5 of which replace existing drainage structures and 1 is new location. Each of the 6 box culverts will be buried 1' below the existing
stream bed and be backfilled with native bed material. Sills will be used at the inlet and outlet ends of each culvert to retain backfilled material within the box. The first proposed
structure is a 1@7'x7' RCBC that carries Goodwin Creek under US 70 and two adjacent service roads, -SRY1 B- and -SRY1 C-. The second structure a 1@6'x7' RCBC that
carries an unnamed tributary to Otter Creek under US 70 and two ramps servicing the proposed Stately Pines Interchange. The third, approximately 380' downstream of the
second culvert, is a 1@7'x7' RCBC that carries an unnamed tributary to Otter Creek under new location service road -SRY1 DY3C-. The fourth is a 1 @7'x7' RCBC that carries an
unnamed tributary to Great Branch under US 70 and adjacent service road -SRY1 DY3C-. The fifth culvert is a 2@7'x7' RCBC (1 hydraulic barrel, 1 wildlife crossing barrel) that
carries an unnamed tributary to Brice Creek under US 70 and adjacent service road-SRY3DY4C-. The sixth, approximately 170' downstream of the fifth Culvert, is a 1 @7'x7'
RCBC that carries an unnamed tributary to Brice Creek under service road-SRY4B-. Dry detention basins are utilized throughout the project to attenuate increases in peak flow
and provide stormwater treatment. Along the entire length of the project grassed swales in the median and outside shoulder areas are used for treatment when BMP design
standards can be met. The primary function of these grassed swales is to reduce flow velocity, promote sedimentation infiltration and runoff attenuation. Rip rap pads are used at
all storm drain system outlets to dissipate energy and reduce velocities to non-errosive at jurisdictional and wetland features. Lastly, 3:1 fill slopes are used in all wetland areas,
to reduce the project footprint and minimize permanent impacts.

Submittal February 6, 2024
Hi hwa North Carolina Department of Transportation
Stormwater
..,.,.,, Highway Stormwater Program
STORMWATER MANAGEMENT PLAN
(Version 3.00; Released August 2021) FOR NCDOT PROJECTS
WBS Element: 44648.3.4 TIP/Prof No.: R-5777C County(ies): Craven Page 2 of 5
General Project Information
Waterbody Information
Surface Water Body 1 : Neuse River
NCDWR Stream Index No.:
27- 104
NCDWR Surface Water Classification for Water Body
Primary Classification:
Class SB
Supplemental Classification:
Swamp Waters (Sw)
(NSW
Other Stream Classification:
None
Impairments:
copper(Cu)
Aquatic T&E Species?
I Comments:
NRTR Stream ID:
Neuse River
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?
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)
Surface Water Body 2 : 1 Goodwin Creek
NCDWR Stream Index No.:
27-112-6-2
NCDWR Surface Water Classification for Water Body
Primary Classification:
Class SC
Supplemental Classification:
Swamp Waters (Sw)
(NSW
Other Stream Classification:
None
Impairments:
None
Aquatic T&E Species?
F Comments:
NRTR Stream ID:
Goodwin Creek
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?
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) I
Surface Water Body 3 : 1 Otter Creek
NCDWR Stream Index No.:
27-108
NCDWR Surface Water Classification for Water Body
Primary Classification:
Class SC
Supplemental Classification:
Swamp Waters (Sw)
(NSW
Other Stream Classification:
None
Impairments:
None
Aquatic T&E Species?
T Comments:
NRTR Stream ID:
Otter Creek
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?
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)

Submittal February 6, 2024
Highway
Stormwater \=
(Version 3.00; Released August 2021) \
WBS Element: 44648.3.4 TIP No.: R-5777C Count ies : Craven Page 3 of 5
Additional Waterbody Information
Surface Water Bod 4 : Great Branch
NCDWR Stream Index No.:
27-101-40-3
NCDWR Surface Water Classification for Water Body
Primary Classification:
Class C
Supplemental Classification:
Swamp Waters (Sw)
(NSW
Other Stream Classification:
None
Impairments:
None
Aquatic T&E Species?
F Comments:
NRTR Stream ID:
N/A, im acted streams identified in the NRTR drain to Great Branch
Buffer Rules in Effect: Neuse
Project Includes Bridge SpanningWater Bodno ?
No
Deck Drains Discharge Over Buffer? N/A
Dissipator Pads Provided in Buffer? N/A
Deck Drains Discharge Over Water Bod ?
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)
Surface Water Bod 5 : 1 Crooked Run
NCDWR Stream Index No.:
27-108-1
NCDWR Surface Water Classification for Water Body
Primary Classification:
Class SC
Supplemental Classification:
Swamp Waters (Sw)
(NSW
Other Stream Classification:
None
Impairments:
None
Aquatic T&E Species?
F Comments:
NRTR Stream ID:
N/A, no impacted streams identified in the NRTR drain to Crooked Run
Buffer Rules in Effect: Neuse
Includes Bridge Spanning Water Body?—.
N/AProject
D
Dissipator Pads Provided in Buffer? INA
Deck Drains Discharge Over Water Bod ?
INA
(If yes, provide justification in the General Project Narrative)
I
(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)
Surface Water Bod 6 : 1 Brice Creek
NCDWR Stream Index No.:
27-101-40- 1
NCDWR Surface Water Classification for Water Body
Primary Classification:
Class C
Supplemental Classification:
Swamp Waters (Sw)
(NSW
Other Stream Classification:
None
Impairments:
None
Aquatic T&E Species?
Comments:
NRTR Stream ID:
Stream SF, SG & SE
Buffer Rules in Effect: Neuse
Project Includes Bridge Spanning Water Body?
JNo
I Deck Drains Discharge Over Buffer? N/A
Dissipator Pads Provided in Buffer? I N/A
Deck Drains Discharge Over Water Body?
INA
(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)
Surface Water Bod 7 : 1
NCDWR Stream Index No.:
NCDWR Surface Water Classification for Water Body
Primary Classification:
Supplemental Classification:
Other Stream Classification:
Impairments:
A uatic T&E Species?
Comments:
NRTR Stream ID:
Buffer Rules in Effect:
Project Includes Bridge Spanning Water Body?
Deck Drains Discharge Over Buffer?
Dissipator Pads Provided in Buffer?
Deck Drains Discharge Over Water Body?
(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) I

Submittal February 6, 2024
I-Ijghway North Carolina Department of Transportation
Stor 'ter
,.,., Highway Stormwater Program
STORMWATER MANAGEMENT PLAN
(Version 3.00; Released August 2021) FOR NCDOT PROJECTS
WBS Element: 44648.3.4 TIP/Proj No.: R-5777C County(ies): Craven Page 4 of 5
Swale
Sheet
No.
Line
Station
Location
(LT,RT,CL)
Latitude
Longitude
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
02
(cfs)
V2
(fps)
Q10
(cfs)
V10
(fps)
Rock
Checks
Used
BMP
Associated w/
Buffer Rules?
7
Y1RPD
20+00
RT
(3)Otter Creek
0.0
4.0
3.0
1.4
140
450
0.30%
3.1
1.3
3.9
1.3
No
Yes
7
L
55+30
RT
(3)Otter Creek
3.0
3.0
3.0
6.0
600
961
0.40%
10.8
1.9
13.8
2.1
No
Yes
8
L
63+50
RT
(3)Otter Creek
2.0
4.0
3.0
5.8
580
1500
0.30%
13.0
1.8
16.2
1.9
No
Yes
8
SRYIDY3c
29+05
LT
(3)Otter Creek
0.0
4.0
3.0
1.8
180
255
1.88%
4.2
2.7
5.2
2.9
Yes
Yes
$
ISRYIDY3C,
29+10
LT
I
(3)Otter Creek
0.0
1 4.0
3.0
1.4
1 140
240
2.21 %
1 3.1
2.7
3.9
2.8
1 Yes
Yes
8
SRYIDY3c
30+50
RT
(3)Otter Creek
0.0
4.0
3.0
0.2
20
110
2.73%
0.7
2.0
0.9
2.1
No
Yes
9
8RYIDY3c
49+28
RT
(3)Otter Creek
0.0
4.0
3.0
0.5
50
178
1.12%
1.4
1.7
1.7
1.8
No
Yes
9
SRYIDY3c
49+32
RT
(3)Otter Creek
0.0
4.0
3.0
0.8
80
458
0.72%
2.5
1.7
3.1
1.8
No
Yes
10
SRY1A
60+03
LT
(3)Otter Creek
2.0
4.0
3.0
3.1
310
659
0.30%
7.0
1.6
8.7
1.6
No
Yes
10
SRY1A
60+13
LT
(3)Otter Creek
2.0
4.0
3.0
1.5
150
446
0.45%
4.4
1.6
5.5
1.7
No
Yes
10
8RYIDY3c
69+75
RT
(3)Otter Creek
2.0
4.0
3.0
2.7
270
645
0.40%
11.0
1.9
13.6
2.0
No
Yes
10
SRYIDY3c
70+30
RT
(3)Otter Creek
3.0
4.0
3.0
9.4
940
1523
0.31%
21.5
2.0
28.9
2.2
No
Yes
17
L
202+94
LT
(6)Brice Creek
2.0
1 4.0
3.0
10.7
1 1070
2260
0.30%
1 18.0
2.0
23.1
2.1
1 No
Yes
17
L
203+50
LT
(6)Brice Creek
2.0
4.0
3.0
1.3
130
400
0.40%
4.0
1.5
5.0
1.6
No
Yes
17
SRY413
25+70
RT
(6)Brice Creek
0.0
4.0
3.0
3.4
340
670
1.18%
6.1
2.5
7.8
2.7
No
Yes
17
SRY4B
25+80
LT
(6)Brice Creek
0.0
4.0
3.0
1.5
150
570
0.43%
3.7
1.5
4.6
1.6
No
Yes
17
SRY413
25+85
RT
(6)Brice Creek
0.0
4.0
3.0
0.5
50
315
0.31 %
1.2
1.0
1.5
1.1
No
Yes
18
SRY4B
42+62
LT
(6)Brice Creek
2.0
4.0
3.0
5.3
530
807
0.43%
11.9
2.0
14.8
2.1
No
Yes
18
SRY413
42+75
LT
(6)Brice Creek
2.0
4.0
3.0
5.6
560
1220
0.35%
13.1
1.9
16.3
2.0
No
Yes
Additional Comments
Water Quality rock check dams used as alternative design where required design storm velocities cannot be met due to site constraints.

Submittal February 6, 2024
Hi tlwayNorth Carolina Department of Transportation
�StOrrYl t�r4 Highway Stormwater Program
111�11 STORMWATER MANAGEMENT PLAN
(Version 3.00; Released August 2021) FOR NCDOT PROJECTS
WBS Element: 44648.3.4 TIP/Prof No.: R-5777C County(ies): Craven Page 5 of 5
Other Toolbox Best Management Practices
Sheet
No.
Line
Station
Location
(LT,RT,CL)
Latitude
Longitude
Surface Water Body
BMP Type
Drainage Area
(ac)
New Built -Upon
Area
(ac)
Volume Treated
(ac-ft)
Precipitation Depth
Treated over NBUA
(in)
BMP Associated
w/ Buffer Rules?
13
SRYIDY3C
92+40
RT
34.97521
-76.97397
(4)Great Branch
Dry Detention Basin
3.2
1.3
0.266
2.58
No
16
Y3RPC
25+67
LT
34.98728
-76.98007
(1)Neuse River
Dry Detention Basin
5.2
2.2
1.92
11.02
No
16
Y3RPD
14+14
LT
34.99118
-76.98163
(6)Brice Creek
Dry Detention Basin
3.4
1.5
0.251
2.11
No
18
SRY4B
44+44
LT
34.99982
-76.98705
(6)Brice Creek
Dry Detention Basin
2.0
0.8
0.228
3.43
No
20
SRY4B
66+76
RT
35.00517
-76.98991
(6)Brice Creek
Dry Detention Basin
6.7
3.3
2.22
8.55
No
21
1 SRY4A
22+62
RT
35.012056
-76.99369
(6)Brice Creek
Dry Detention Basin
5.0
2.7
1.68
7.97
No
Additional Comments
Primary function of dry detention basins for the R-5777C project is to detain runoff from impervious roadway surface and attenuate peak 100-yr flow to meet or reduce pre -construction conditions.