20140175 Ver 1_More Info Received_20140221

Homewood, Sue
From: Slaughter, Johnathan H
Sent: Friday, February 21, 2014 3:52 PM
To: Homewood, Sue
Subject: FW: R -5525 Stormwater Plans
Attachments: R5525 Sht 4 &5.pdf; R5525 Stormwater Management Plan.xls
Importance: High
FYI — See attached revisions.
From: Laws, Joseph L
Sent: Friday, February 21, 2014 3:47 PM
To: Slaughter, Johnathan H
Subject: FW: R -5525 Stormwater Plans
Heath,
Attached are some revisions as requested by NCDOT Hydraulics unit. Please provide this information to NCDENR.
Thanks,
Joe
From: Roberts, Walter [mailto:wroberts @louisber eg r.com]
Sent: Friday, February 21, 2014 3:18 PM
To: Laws, Joseph L
Subject: RE: R -5525 Stormwater Plans
Hello Mr. Laws, I hope you are doing well. I have attached the revised roadway plan sheets and SMP per Brian's
recommendations. Please let me know if you need anything else.
1TI. 11
From: Laws, Joseph L [mailto:jlaws @ncdot.gov]
Sent: Tuesday, February 18, 2014 9:27 AM
To: Roberts, Walter
Subject: FW: R -5525 Stormwater Plans
Walter,
Below are comments regarding the SMP. Not sure if any of this has been addressed. Some them may have already been
addressed. Please review the comments and let me know if you have any questions.
Thanks,
Joe
From: Henegar, Randall C
Sent: Tuesday, February 18, 2014 9:23 AM
To: Laws, Joseph L
Cc: Nottingham, Andrew T
Subject: FW: R -5525 Stormwater Plans

I had Brian look at the SMP and he made the following comments. I have no additional comments.
Fromm: Lipscomb, Brian S
Sent: Monday, February 10, 2014 3:22 PM
To: Henegar, RanUaUC
Cc: McDaniel, Andrew H.
Subject: RE: R-5525 Stormwater Plans
I've looked over the plan sheets and SM P for the roadway as well as taken a quick glance at the Chestnut Ridge SWM
and offer the following comments.
Plans�
)�, Str. 429 needs to be tied to the main system and outlet at Str. 447 as requested in an email sent Fri 1/24 @
l:35pm.
p This is due to the slopes being too steep at Str. 430 for proper siting of a PSH and concerns of re-
concentration
SMP
l. N[DENR Water Classification
l. Change primary toVVS'|V+
Z Remove supplemental 'Trout (Tr)' classification. This ia not aN[DENRclassification. |tiaaN[VVR[
hatchery supported water. This could be noted in the narrative but ia improperly identified aa being a
DENRdaaaiMcadon.
Z 1 don't have any major comments on the narrative other than the last sentence references 'Muddy Creek'. |
thought this was a 'UT to Middle Fork South Fork New Rke�. Narrative needs tobe corrected aaappropriate.
l. Let me know if you'd like to discuss the narrative more.
3. On the PSH/Energy0aaipatoratab
l. The PSHat''L'l6+95Lt.' should beeliminated
It could be beneficial to note the existing channel velocity at the crossing since they are showing it as
exceeding the target. Similar to what we'd have on a [SR since this is only cross pipe per the design
changes.
Let me know if you'd like to discuss further.
Fromm: Henegar, RanUaUC
Sent: Thursday, January 30,Z0144:44PM
To: Lipscomb, Brian S
Subject: FW: R-5525 Stormwater Plans
Please review.
From: Laws, Joseph L
Sent: Thursday, January 30,Z0144:4ZPM
To: Henegar, RanUaUC
Subject: FW: R-5525 Stormwater Plans

Attached is the information for SIMP. Please let me know if you have any comments.
Thanks,
Joe
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North Carolina Department of Transportation
Highway Stormwater Program
STORMWATER MANAGEMENT PLAN
(Version 1.2; Released July 2012) FOR LINEAR ROADWAY PROJECTS
Project/TIP No.: R-5525 County(ies): Watauga Page 1 of 3
General Project Information
Project No.:
R-5525
Project Type: New Location Date: 1/28/2014
NCDOT Contact:
Randy Henegar, PE
Contractor / Designer:
Walter Roberts, PE
Address:
NCDOT Hydraulics Unit
Address:
The Louis Berger Group, Inc.
1590 Mail Service Center
1001 Wade Avenue Suite 400
Raleigh, NC 27699-1590
Raleigh, NC 27605
Phone:
919-707-6700
Phone:
919-866-4400
Email:
[e-mail]
Email:
[e-mail]
City/Town:
Blowing Rock
County(ies):
Watauga
River Basin(s):
New
CAMA County?
No
Primary Receiving Water:
Middle Fork South Fork New River
NCDWQ Stream Index No.:
10-1-2-(1)
NCDWQ Surface Water Classification for Primary Receiving Water
Primary:
Water Supply IV (WS-IV)+
Supplemental:
Other Stream Classification:
None
303(d) Impairments:
None
Buffer Rules in Effect
N/A
Project Description
Project Length (lin. Miles or feet):
0.485 mi. Surrounding Land Use: wooded, commercial, low residential
Proposed Project
Existing Site
Project Built-Upon Area (ac.)
2.94 ac.
1.08 ac.
Typical Cross Section Description:
Proposed section is 2-12' lanes with 30" curb & gutter and a 5' concrete sidewalk along
Existing section is a 15' wide gravel and earth road with open ditches.
one side.
Average Daily Traffic (veh/hr/day):
Design/Future: N/A
j Existing: N/A
General Project Narrative:
This project consists of constructing 0.485 miles of new roadway including a 100' bridge over Middle Fork Creek. The roadway will be a 2-12' lane facility with curb & gutter
and having a 5' sidewalk along one side. The bridge will be a 21" cored slab bridge having 2-50' spans and a 631 out to out width. The bridge and a portion of the roadway will
be constructed on new location. The rest of the roadway will be constructed on or adjacent to an existing 15' gravel drive. The roadway is mostly in a cut on one side and a fill
on the other to balance out earthwork and maintain allowable, traversable grades. The natural ground topography is very steep, having slopes around 25% to 40% which
greatly restricted the location and types of proposed drainage outlets. The existing topography allowed the placement of a preformed scour hole at two outlet locations. The
preformed scour holes will diffuse flow from each drainage system and allow the runoff to filter through the natural buffer of Middle Fork Creek. Rip rap dissipator pads were
used at other outlet locations to reduce pipe outlet velocities and produce non-erosive flow. No roadway inlets were added to the 30" cross pipe at the JS crossing which
eliminated direct discharge from the roadway into the stream. The main drainage system is outleted onto an over sized rip rap dissipator pad to ensure reduced velocities and
diffused flow before entering the wetland downstream. Offsite drainage has been intercepted and collected into berm ditches which tie into the storm drainage system. By
intercepting the overland flow, erosion along the roadway cut slopes can be greatly reduced or eliminated altogether and any offsite water can be adequately discharged from
the system. With the construction of the new route, the existing earth and gravel road will be removed, thus vastly reducing the amount of sediment loss associated with the
existing drive. Research studies have shown that sediment loads from a paved two lane secondary roadway with a very low ADT can be expected to be similar to that of
clean roof. Furthermore, the drainage designs from the project do not produce any new direct discharges into Middle Fork South Fork New River and drainage outfalls were
kept as far away from Middle Fork South Fork New River as practicable.
References

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