SW7091009_HISTORICAL FILE_20100427

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW(����
DOC TYPE
❑ CURRENT PERMIT
❑ APPROVED PLANS
HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
047
YYYYM M D D

Moore, Bill
From: Joe Boyd [[e-mail]]
Sent: Tuesday, April 27, 2010 11:26 AM
To: Moore, Bill
Cc: Gates, Jim, Jeff Thompson
Subject: L Bertie Correctional Institute SW7091009 Permit Error,
an
Jim Gates at the Department of Corrections received the Stormwater Permit for the Bertie Correctional Institute today
and forwarded a copy to us this morning. I expect we will get our copy in the mail within a day or two. When reading
through the permit I did notice an error in the impervious numbers for Pond 3 which receives the additional runoff from
the new proposed building.
The total impervious area stated on Page 3 of the permit'reads 14.62 acres when i should be 15.17 acres with the
addition of the new building. Also, on Page 5 of the permit Basin 3 list a total impervious area or 4.63 acres when it in
fact should be 5.18, again due to he new building. I believe this is just a simple error since the differences in impervious
area are 0.55 acres on both numbers and that is the exact impervious area for the new building.
I do -not see any other problems with the permit and this simple correction should be the only issue. Thanks again for
your time with this project and please let me know your decision on revising the impervious numbers on the permit.
Joe
Hobbs, UpChurch & Associates, P.A.
8262-201 Market Street
Wilmington, NC 28411
Phone: [phone]
Fax: [phone] � �10

APR 14 2010
STORMWATER CALCULATIONS
for the
BERTIE COUNTY CORRECTIONAL INSTITUTE
N.C. Department of Corrections
Windsor, North Carolina
FESS/p C/w
SEAL
33762
�FY S. TH��
y „',3, ,,•l o
Prepared By
Hobbs, Upchurch & Associates, P.A.
8262-201 Market Street
Wilmington, North Carolina 28411
April 2010

Pond #2
Bertie County Correctional Institute
Wet Detention Basin Design
DRAINAGE AREA (Ad) =
442,172
SQ. FT
EXISTING IMPERVIOUS AREA (Ai):
143,313
SQ. FT
ADDITIONAL IMPERVIOUS AREA (Ai):
BUILDINGS:
0
SQ. FT
ROADS:
0
SQ. FT
SIDEWALKS:
0
SQ. FT
OFF -SITE
0
SQ. FT
CONTINGENCY:
0
SQ. FT
TOTAL:
143,313
SQ. FT
PERCENT IMPERVIOUS (1):
I = Ad/Ai = 32.41% (SAY33%)
POND #2 SHALL HAVE A DEPTH OF 4' AS PREVIOUSLY PERMITTED
AND BE DESIGNED TO REMOVE 90%TSS.
SA/DA= 2.94%
SAREq,= 13,000 SF. _
0.30 AC
SURFACE AREA PROVIDED AT PERMANENT POOL (ELEV. 24.5) = 14,202 SF
SA PROV'D= 14,202 > 13,000 =SA REQ'D OK 11
POND #2
DATA SHEET
PAGE 1 OF 4
H:\DCO9O2 - Bertie Prison EC & SWM\Project Management\Storm Water\SWM\100129-REDUG POND 2 CALCS\100129-Pond 2-JB-OLD RULES-calc.xlsx

MINIMUM REQUIRED VOLUME (SIMPLE METHOD BY TOM SCHUELER):
Rv=0.05+0.009*(I)
Rv= 0.34170011
VOLUME= 1.5"*Rv*Ad = 0.433569542 AC -FT
18,886 FTA3
VOLUME PROVIDED ATTEMPORARY POOL:
INCREM. TOTAL
EL. SA SF VOL. CF VOL. CF
24.5
14,202
0
0
25
15,444
7,411
7,411
26
20,394
17,919
25,330
27
24,912
22,653
47,983
MINIMUM TEMP. POOL ELEVATION (FROM SIMPLE METHOD VOLUME):
REQ'D EL.= 25.7
VOL. PROV'D = 19,955 CF
TEMP. POOL ELEVATION:
OUTLET EL. = 25.80
VOL. PROV'D = 21,746 CF
NOTE: SINCE THE ELEVATION OF THE NEXT AVAILABLE OUTLET ABOVE THE NORMAL POOL
IS GREATER THAN THE MINIMUM TEMP. POOL ELEVATION, THE OUTLET ELEVATION
.IS THE TEMPORARY POOL ELEVATION.
VOL. PROV'D= 21,746 > 18,886 =VOL. REQ'D OK
POND #2
DATA SHEET
PAGE 2OF4
H:\DC0902 - Bertie Prison EC & SWM\Project Management\Storm Water\SWM\100129-RE DUG POND 2 CALCS\100129-Pond 2-1B-OLD RULES-calc.xlsx

FOREBAY SIZING:
PERMANENT POOL VOLUME:
INCREM. TOTAL
EL. SA SF VOL. CF VOL. CF
20
2,741
0
0
21
4,826
31783
3,783
22
7,076
5,951
9,734
23
9,392
8,234
17,968
24
11,768
10,580
28,548
24.5
14,202
6,492
35,040
REQ'D VOLUME = 20%TOTAL = 7,008 CF
CHECK FOREBAY VOLUME:
INCREM. TOTAL
EL. SA SF VOL. CF L. CF VO
20
577
0
0
21
1,156
866
866
22
1,813
1,485
2,351
23
2,540
21177
4,527
24
3,334
2,937
7,465
PROV'D VOLUME = 7,465 CF (3' DEEP FOREBAY)
VOL. PROV'D= 7,465 = 7,008 =VOL. REQ'D OK
PONDk2
DATA SHEET
PAGE 3 OF 4
H:\DC0902 - Bertie Prison EC & SWM\Project Management\Storm Water\SWM\100129-REDUG POND 2 CALCS\100129-Pond 2-JB-OLD RULES-calc.xlsx

ORIFICE SIZING: REQ'D DRAWDOWN TIME = 2-5 DAYS
NOTE: ORIFICE SIZED TO DRAWDOWN THE TEMPORARY POOL IN 2-5 DAYS
Q2= 0.10930 CFS (FOR 2 DAY DRAWDOWN)
Q5= 0.04372 CFS (FOR 5 DAY DRAWDOWN)
ORIFICE EL.= 24.5 (PERM. POOL EL.)
TEMP. POOL EL. = 25.80 (OUTLET EL.)
ORIFICE DIAMETER = 2.0 IN.
Q PROV'D= Cd*A*(2gh)A1/2 WHERE: Cd= 0.6
A= 0.0218166 SF
g= 32.2 FPS/S
h= (TEMP POOL -NORMAL POOL)/3
= 0.4333333
Q PROV'D= 0.06915
Q2> 0.06915 >Q5 OK
DRAWDOWN TIME:
TIME = VOLUME = 3.16 DAYS
Q PROV'D
POND #2
DATA SHEET
PAGE 4 OF 4
H:\DCO902 - Bertie Prison EC & SWM\Project Management\Storm Water\SWM\100129-RE DUG POND 2 CALCS\100129-Pond 2-1B-OLD RULES-calc.xlsx

Pipe Flow
Mannin
's Equation):
Number of Pipes=
1
Slope S (ft/ft) 0.0016
Diameter D (in)=
36
Manning's n 0.012
Qmax (cfs) =
28.0
(based on above S and n)
Velocity if flowing full Q (fps) =
4.10
(from Q/A)
Depth of flow @ Design Q (ft) =
Velocity of flow @ Design Q (ft) =
HANHC801 -North State Gardens\Project Management\Stormwater\100114-Culvert-Ditch-CALC-JB.xlsx

Ripr— Velocity Dis'sipator
DATE
P.adr Pond#.1 B 0SS
APRIL 2010
PROJECT NAME
PROJECT NO
Bertie County Correction Institute
DC0902
LOCATION
Bertie County, North Carolina
BY
JSB
Hohhs, Upchurch & Associates, Y.A.
Consulting Engineers
CHECKED BY
JT
STORM DESIGN:
Maximum Pipe Flow
BACKGROUND:
Use the E&S Control Planning & Design Manual, Section 8.06.
REFERENCE:
(NCDEHNR, 1993)
Step 1. Minimum Tailwater Condition
Step 2.
D-o =
36
in.
D-o =
3.00
ft.
O-max=
28.97
cfs
d-50 =
0.6
ft.
L-a =
19
ft.
Step 3.
3'D-o =
9
ft.
W =
22.00
ft.
Step 4.
d-max
0.90
ft.
d-max
11
in.
Step 5.
Thickness =
1.35
ft.
Thickness =
16
in.
N DIMENSIONS:
Figure 8.06 a
Figure 8.06 a
Maximum Stone Diameter (1.5'd-50)
Apron Thickness With Filter Fabric (1.5'd-max)
,Apron Dimensioris ..
.'Riprap'
Length
"'Width
. 3-Do',
...Thick-
Class.
19
1 22
1 9
1 36in.
2
Omax = Maximum Discharge for pipe size and slope, (cfs)
D-o = Pipe Diameter, (in. & ft.)
d-50 = Mean Stone Diameter of Rip -Rap, (h.)
L-a = Length of Rip -Rap Apron, (ft.)
3'D-o = Width of Rip -Rap Apron @ Pipe Outlet, (ft.)
W = Width of Rip -Rap Apron @ End of Apron, (ft.)
d-max = Maximum Stone Diameter of Rip -Rap, (ft, & in.)
Thickness = Thickness of Rip -Rap Apron With Filter Fabric, (ft. &in.)

Hobbs, Upchurch & Associates, P.A.
1411 Consulting Engineers
8262 Market St. - Suite 201 • Wilmington, NC 28411
April 13, 2010
Nor. William.). Nloore
Environmental Engineer
NCDENR
943 Washington Square N4all
Washnugton, NC 27889
Re: North Carolina Department of Corrections
Bettie County Correctional Institute Building Addition
Stormwater Additional Information Submittal SW7091009
Dear Nor. I\loore,
APR, 14 mo
Hobbs, Upchurch and Associates received your correspondence via email requesting more
information for the above reference project on April 8, 2010. Our responses to your requests ate as
follows:
"I"he completed updated supplements and O&N4 forms signed by William Stovall for all three
ponds are attached.
2. Plan Sheet 7 has been updated to include Note 4 on the plan stating that "the above notes
apply only to the existing stornwater ponds and the existing site conditions. See Sheet 12
for proposed vegetation plan." This should clear up any confusion on which vegetation plan
the contractor is to follow. Also, Note 4 has been added to Sheet 10 to instruct the
contractor to follow the Vegetation Plan on Sheet 12 for Pond 2 along with Pond 3, which
has also been updated to include Pond 2.
3. 'I"lie calculations for the bypass system on Pond 1 have been attached along with riprap
calculations for the bypasses outlet. Sec attached calculations and Sheet 8 for the riprap
siziog.
4. Pond 2 now meets the minimum surface area requirement. It is now designed to be one
foot deeper than the previous design allowing a lower SA/DA number which in turn
decreases the minimum required surface area. See attached calculations.
5. A note has been added to the Vegetation Plan on Sheet 12 giving directions to the
contractor on the amount of lime and fertilizer to add to the pond banks.
Attached in this submittal are 2 sets of updated full size plans, updated Pond 2 calculations, the
bypass pipes calculations with riprap calculations, and updated complete supplements and O&Nl
forms for all three ponds.
Wilmington, NC . Telephone [phone] . Fax [phone] . email: [e-mail]
Southern Pines . Charlotte

Thanks again for discussing these comments with me, and if you should have any questions with
respect to this information, please do not hesitate to contact me.
Sincerely,
HOBBS, UPCHURCH & ASSOCIATES, P.A.
Joe Boyd

Moore, Bill
From: Moore, Bill
Sent: Thursday, February 18, 2010 4:13 PM
To: HUA
Cc: Jim Gates
Subject: ! Bertie DOC - stormwater permit'
Good Afternoon Jeff & Jim,
I agreed to send you an email with some guidance regarding the!vegetation plan requirements for the wet ponds. Well,
it took me longer than I expected, but here it is; hope this helps:
1) There is a "required items checklist' in the 2007 Manual, BMP Vegetation, Chp 6, Sect 6.4.1. This list is
somewhat general; but it gives a good idea about the pieces of the plan. Most of these items can be listed on
the detail plan sheet in the form of Construction Notes/Schedule. You could look at these notes as a way of
translating the vegetation requirements from the BMP manual into instructions for the Contractor. In other
words, the contractor should be able read the plans & build the system from the info provided on the plans &
supporting written specifications.
2) Notes about site prep/grading of the shelf with attention to soil media/analysis/amendments as needed.
3) Notes regarding Plants; including, plant species, quantities, location with respect to shallow water & shallow
land zones, spacing/clustering, installation, fertilizer requirements, watering, warranty; and important - specify
source of viable/quality plants.
4) Provide plan details that mesh with the specifications & notes.
I will try to review the package you provided during our site visit & get back to you if I have questions. I suggest, put the
vegetation plan together (2 copies) & send it in asap; I hope to complete my review & get this permit out the door by
mid -March, maybe. Let me know if you have questions.

wATF
Q
--1
NC Department of Corrections
Attn: Mr. William N. Stovall
4216 Mail Service Center
Raleigh, NC 27699
Dear Mr. Stovall:
01ax_- o
Beverly Eaves Perdue, Governor
Dee Freeman, Secretary
North Carolina Department of Environment and Natural Resources
December 17. 2009
Subject: Stormwater Review SW7091009
Bertie Correctional Facility
Building Addition
Bertie County
Coleen H. Sullins, Director
Division of Water Quality
This office received your request to modify the stormwater permit for the subject site on October
13, 2009. 1 visited the site on December 11, 2009 and met with the facility maintenance supervisor, Mr.
Chuck Gurganus. We inspected the stormwater control measures and discussed flooding issues and
changes that have occurred at the site in the recent past. Mr. Jeff Thompson, with Hobbs Upchurch &
Associates, submitted plans and specifications along with the application showing the proposed building
additions. A preliminary review of the plans and specifications has been completed. In order to complete
your application, and before a permit can be issued, the following items must be addressed:
1. Provide full scale plans & details showing existing drainage basins and stormwater control
measures, and any proposed changes to the site.
2. Based on past flooding issues & current BMP design requirements the existing wet pond
systems appear to be inadequate. Stormwater controls need to be re-
evaluate, redesigned, and/or, modified to provide adequate treatment & flood control.
3. Revise stormwater application, supplement sheets, plans & specifications to reflect all
changes.
The above requested information must be received in this office by January 17, 2010, or your
project will be returned as incomplete. If the project is returned, a new application and fee will be
required. If you have questions, please feel free to contact me at [phone], or you can send a
message to: [e-mail].
Slin-ce/rel ,
William J. Mo e_
Environmental Engineer
Washington Regional Office
CC' Hobbs Upchurch & Associates, Wilmington, NC
Bertie County Planning/Inspections
;,/Washington Regional Office
Mailing Address Phone [phone] Location NonehCarolina
1617 Mail Service Censer Fax [phone] N. Salisbury St. Yat-wrant
Raleigh, NC 27699-1617 Raleigh. NC 27604
Internet: www.newaterouality.ore Customer Service l-A77-623-6738
An Equal Opportunity/Affirmative Action Employer - 50% Recycled110% Post Consumer Paper