SW8950317_HISTORICAL FILE_19950801

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW8 gS031-1
DOC TYPE
❑ CURRENT PERMIT
❑ APPROVED PLANS
HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
10Iq S d 8 o i
YYYYMMDD

State of North Carolina
Department of Environment, Health, and Natural Resources
Wilmington Regional Office
James B. Hunt, Jr., Governor DIVISION OF ENVIRONMENTAL MANAGEMENT Bob Jamieson
Jonathan B. Howes, Secretary WATER QUALITY SECTION Regional Manager
August 1, 1995
Mr. Douglas W. Kramer
Onslow Memorial Hospital
Post Office Box 1358
Jacksonville, North Carolina 28541
Subject: CERTIFICATION OF COMPLIANCE
with Stormwater Regulations
Stormwater Project No. SW8 950317
Onslow Memorial Hospital Urgent Care Facility
Onslow, County
Dear Mr. Kramer:
This Certification is pursuant to the application for Onslow Memorial Hospital Urgent Care
Facility received on March 20, 1995, with additional information received on July 21, 1995. Staff review
of the project plans and specifications has determined that the stormwater control system as proposed for
the Onslow Memorial Hospital Urgent Care Facility will comply with the Stormwater Regulations set
forth in Title 15A NCAC 2H.1003(i). The runoff from 109,967 square feet of impervious area will be
treated in a detention pond sized to achieve 90% reduction in Total Suspended Solids.
Any modification of the plans submitted to and approved by this Office or further development
of this site regardless of the fact that the modification may be less than 1 acre, will require an additional
Stormwater Submittal/Modification and approval prior to initiation of construction. Modifications include
but are not limited to; project name changes, transfer of ownership, change of owner address, redesign
of built -upon surfaces, addition of built -upon surfaces, redesign or further subdivision of the project area.
This Certification shall be effective from the date of issuance until rescinded. The project shall
be constructed and maintained in accordance with the plans and specifications approved by the
Wilmington Regional Office. This Certification does not supersede any other permit or approval. The
developer is responsible for obtaining any and all permits and approvals necessary for the development
of this project. This could include the Division of Coastal Management under CAMA requirements, the
Division of Environmental Management under Wetland 401 Water Quality Certification and/or a Dredge
and Fill Permit and/or a Sewer Extension/Collection Permit, U.S. Army Corps of Engineers 404 Wetland
Permit, NPDES Stormwater Permit if disturbing five acres or more, local County or Town Agency
permits under their local ordinances, or others that may be required.
127 Cardinal Drive Extension, Wilmington, N.C. 28405-3845 • Telephone [phone] • Fax [phone]
An Equal Opportunity Affirmative Action Employer

I
Mr. Kramer
August 1, 1995
Stormwater Project No. SW8 950317
A professional engineer must certify that the stormwater system has been installed in accordance
with the approved plans and specifications upon completion of construction. The attached certification
must be received in this Office within 30 days of completion of construction.
The detention pond must be constructed in it's entirety, operational for it's intended use, and
permanently vegetated prior to the construction of any impervious surfaces proposed as a part of the
project, except roads. Failure to construct the stormwater controls as approved is considered a violation
of this Certification.
If you have any questions concerning this matter, please call Ms. Linda Lewis or me at (910) 395-
Sincerely,
Dave Adkins
Water Quality Supervisor
DA/arl: S:\WQS\STORMWAT\CERTIFIC\950317.AUG
cc: Don Kennedy, P.E.
James Gurganus, Onslow County Inspections
Bradley Bennett
Linda Lewis
•Wilmington. -Regional -Office
Central Files

DIVISION OF ENVIRONMENTAL MANAGEMENT
PROJECT DATA
Project Name:
Project Number:
Location:
Applicant:
Mailing Address:
Submittal Date:
Water Body Receiving Stormwater Runoff:
Classification of Water Body:
If Class SA, chloride sampling results:
Pond Depth:
Permanent Pool Elevation:
Total Impervious Surfaces Allowed:
Offsite Area entering Pond:
Green Area entering Pond:
Required Surface Area:
Provided Surface Area:
Required Storage Volume:
Provided Storage Volume:
Temporary Storage Elevation:
Controlling Orifice:
Onslow Memorial Hospital Urgent Care Facility
SW8 950317
Onslow County
Mr. Douglas W. Kramer
Onslow Memorial Hospital
Post Office Box 1358
Jacksonville, North Carolina 28541
March 20, 1995
Scales Creek
"SC HQW"
RUM
3.5 feet
34 MSL
109,967 square feet
N/A
123,708 square feet
10,996 square feet
11,049 square feet
10,838 cubic feet
11,228 cubic feet
34.95 MSL
1.5" pipe

WET DETENTION POND EVALUATION
1. Yes No The design storage is for the runoff from all impervious surfaces resulting from
1-inch of rainfall and is located above the permanent pool.
2. Yes No The permanent pool is designed for 90% total suspended solid (TSS) removal.
Therefore, no vegetative filter is required.
3. Yes No The runoff completely draws down to the permanent pool in 5 days, but not less
than 2 days.
4. Yes No The mean depth of the permanent pool is a minimum of 3 feet.
5. Yes No The inlet structure is designed to minimize turbulence and short circuiting.
6. Yes No An appropriate operation and maintenance plan has been provided for the
system.
7. Yes No THIS PROJECT MEETS THE STORMWATER CONTROL REQUIRMIENTS
OF 15A NCAC 211.1003 (g), (i), (k), and (1) (For Yes, 1 through 7 must all
be highlighted Yes.)
Brief Explanation: This detention pond is designed to remove 90% total suspended solids without the
aide of a vegetative filter.
DIVISION OF ENVIRONMENTAL MANAGEMENT SIGN -OFF
Wilmington Regional Office
l AUG 55 AP'wc
Date Individual Evaluating Form/Plans
Date Regional Water Quality Supervisor
cc: Applicant/Bradley Bennett/arl/WiRO/CF

Onslow Memorial Hospital Urgent Care Facility
Onslow County
Stormwater Project No. SW8 950317
Engineer's Certification
I, , as a duly registered Professional Engineer in the State
of North Carolina, having been authorized to observe (periodically/weekly/full time) the construction of
the project,
(Project)
for (Project Owner) hereby state that, to the best of my abilities,
due care and diligence was used in the observation of the project construction such that the construction
was observed to be built within substantial compliance and intent of the approved plans and specifications.
Signature
Registration Number
Date

DIVISION OF ENVIRONMENTAL MANAGEMENT
DENSITY ENGINEERED
PROJECT DATA
Project Name Onslow Memorial Hospital - Navcare/Urgent Care Center
Location (County, Townsh
Jacksonville, North Car
ipality, Address, State Road)
Onslow County
Owner's Name Onslow Memorial Hospital
MailingAddress Post Office Box 1358
Jacksonville N.C. 28541
Phone Number [phone] Submittal Date.
317 Western Boulevard,
Brief Description (include map and appropriate drawings) A 16,000 SF outpatient health
care facility.
Name of Water Body Receiving Stormwater Runoff tributary to Stales Creek
Classification of Water Body SCHQ14-NS14 If SA waters, engineered system, and distance is <0.5
miles, attach report of chloride sampling results mg/I
State/Federal Permits/Approvals Required (Check appropriate blanks)
CAMA Major
404 Permit
Other (Specify)
CALCULATION OF BUILT UPON AREA
Sedimentation/Erosion Control X
DEM/DHS Sewage Disposal
Built upon area means that portion of a development that is covered by impervious or partially pervious cover
including buildings, pavement, recreation facilities, gravel, etc., but not including wood decking. If the project
includes areas draining to different water classifications, please note them separately below.
Subwatershed Subwatershed
Classification SCHQW-NSW
Built upon area 109 967 SF
Total Project Area 233,675 SF
% Built upon Area 47%
Allowable B/U Area 70,103 SF
Is the Project B/U Area 5 the Allowable B/U Area?"': - N�� ^>'"Of no, an engineered system is required.)
% Built upon area = (built upon area / total project area) - 100
Built upon area limits for projects to meet density: SA waters --- 25%, Other ---30% office fuse only ,,
�a V1r� ' 4
STORMWATER COLLECTION SYSTEM
Describe how the runoff will be treated ]'later Quality Basin (fret
detention pond)
� E UBUBUR � th
.' MAR.,2,:0 f995 U i
PROJ
5�8 MSG3!?

BUFFER AREA
Is the built upon area at least 30 feet from mean high water of all surface waters? Yes If no, please
provide a description
(Note: Only boat ramps, public roads, public bridges, and walkways to water related facilities are allowed
within 30 feet of the mean high water line if the project is intended to meet stormwater control
requirements through density limits.)
DEED RESTRICTIONS AND PROTECTIVE COVENANTS
By my signature below, I certify that the recorded deed restrictions and protective covenants for this project
shall limit the allowable built -upon area per lot to N/A square feet inclusive of right-of-way,
structures, pavement, walkways or patios of brick, stone, or slate, not including wood decking, state that
N/A the covenants will be binding on all parties and persons claiming under them, that they will run with the
land, and that benefits may be enforced by the State of North Carolina, therefore, the covenant cannot be
changed or deleted without consent of the State.
CERTIFICATION
I, Jox\rye t.) Y ylR( l _1 certify that the information included on this
submittal form correct, that the project will be constructed in conformance with this information, and
that to the best of my knowledge, the proposed project complies with the requirements of 15 NCAC
2H.1003 (b). I authorize the below named person or firm to submit stormwater plans on my behalf, and
agree to abide by the deedrestriction
(ssttafte 1m11reennXbove. q
Owner's `— Siznp re Date
Provide authorized person or firm name and dress below:
Bass, Nixon & Kennedy, Inc.
7416 Chapel Hill Rd.
Raleigh, North Carolina 27607
l L YQ/7If, a Notary Public for theState of / /Frw/ Oax'a•eGKLI-
Cou of do hereby cepkj;id`=�� /ln.�personally
eared before me this 1 day of tp✓t x{d and acknowledges the due execution
appeared —.�— _—r
of the foregoing instrument. Witness my hand
b
7— 9
M commission expires
199�?
DIVISION OF ENVIRONMENTAL MANAGEMENT SIGN -OFF
Regional Office
fit)G C(5
t ' Date tr�i i
t
�,:�� lCI►•t,6tv1�1471
Date _ r
4•'
Evaluating Forms/Plans
Regional Water Quality Supervisor
cc: Applicant]WiRO/Bradley BennetdCentral Files

its]
BASS, NIXON & KENNEDY, INC. IJUL
ME uuER
CONSULTING ENGINEE7416 CHAPEL HILL ROAD 21 1995
RALEIGH, NORTH CAROLINA 27607
919/851-4422 [ FAX [phone]......................... •rnwr� w
12� G,�1D iNbt, O� �� lolJ
GENTLEMEN:
OI F- TF;nNSIVIITTAL
D.T[
JO[ w0
u� 5
Ik L c
Low
WE ARE SENDING YOU ❑ Attached ❑ Under separate cover via
❑ Shop drawings
❑ Copy of letter
❑ Prints ❑ Plans ❑ Samples
❑ Change order ❑
_the following items:
❑ Specifications
COPIES
WE ARE SENDING YOU ❑ Attached ❑ Under separate cover via
❑ Shop drawings
❑ Copy of letter
❑ Prints ❑ Plans ❑ Samples
❑ Change order ❑
_the following items:
❑ Specifications
COPIES
DATE
NO.
DESCRIPTION ^-r d%F%R RP ul n
grrci'�n'n
I LS ly LS
1/ LS
J
DEM
THESE ARE TRANSMITTED as checked below:
❑ For approval
❑ For your use
ft
requested
rreview and comment
❑ FOR BIDS DUE
REMARKS
❑ Approved as submitted ❑ Resubmit copies for approval
❑ Approved as noted ❑ Submit copies for distribution
❑ Returned for corrections ❑ Return corrected prints
19 ❑ PRINTS RETURNED AFTER LOAN TO US
COPY TO 1�
SIGNED: --f M,\rr
w ....w...........er .. ..e.e. ■nel. mDb wa .r enc[.

State of North Carolina
Department of Environment, Health, and Natural Resources
Wilmington Regional Office
James B. Hunt, Jr., Governor DIVISION OF ENVIRONMENTAL MANAGEMENT Bob Jamieson
Jonathan B. Howes, Secretary WATER QUALITY SECTION Regional Manager
July 5, 1995
Mr. W. Harry Mitchell
Bass, Nixon & Kennedy, Inc.
7416 Chapel Hill Road
Raleigh, North Carolina 27607
Subject: ADDITIONAL INFORMATION
Stormwater Project No. SW8 950317
Onslow Memorial Hospital
Onslow County
Dear Mr. Mitchell:
The Wilmington Regional Office received a Stormwater Submittal for the Onslow Memorial
Hospital on June 29, 1995. A preliminary review of that information has determined that the submittal
for the subject project is not complete. The following information is needed to continue the stormwater
review:
1. The contours at the pond seem to indicate that the side slopes are 4:1, however, the detail
of the outlet structure shows 3:1. Please revise the detail to reflect the actual side slopes
used for the pond and provide 2 copies of that revised plan sheet only.
Please note that this request for additional information is in response to a preliminary review. The
requested information should be received by this Office prior to August 5, 1995, or the submittal will
be returned as incomplete. If you have any questions concerning this matter please feel free to call me
at [phone].
Sincerely,
Ms. Linda Lewis
Environmental Engineer
DA/arl: S:\WQS\STORMWAT\ADDINFO\950317.JLTL
cc: Linda Lewis
Central Files
127 Cardinal Drive Extension, Wilmington, N.C. 28405-3845 • Telephone [phone] • Fax [phone]
An Equal Opportunity Affirmative Action Employer

JUN 2. 4 1995
BASS, NIXON & KENNEDY INC., CONSULTING ENGINEERS
7416 CHAPEL HILL ROAD, RALEIGH, NC 27607
919/851-4422 ■ FAX [phone]
June 26, 1995
Ms. Linda Lewis
N.C. Dept. of Environment, Health and
Natural Resources
Division of Environmental Management
Water Quality Section
127 Cardinal Drive Extension
Wilmington, N.C. 28405-3845
REF: Stormwater Project No. SW8 950317
Onslow Memorial Hospital
Dear Ms. Lewis:
Please find enclosed revised plans for the above referenced project.
Although the scale of this- project has been reduced, the water
quality basin size is the same as originally proposed in
anticipation of the future expansion of this Urgent Care Facility.
We have also provided the additional information requested in your
letter of April 3, 1995.
Your continued assistance in this matter is appreciated.
Very Truly Yours,
BASS, NIXON & KENNEDY, INC.
r
v v t qtc
W.Harry1
WHM/rt
Enclosure
�i
19 9 gh
t
JUN 2 9 1995 U
DEM

is
BASS, NIXON & KENNEDY, INC., CONSULTING ENGINEERS
7416 CHAPEL HILL ROAD, RALEIGH, NC 27607
919/851-4422 ■ FAX [phone]
ONSLOW MEMORIAL HOSPITAL -URGENT CARE CENTER
CALCULATIONS FOR DESIGN OF WATER QUALITY BASIN (WET POND)
� 0A ..
From plans: ST '�"; {++��, '` 1
�t+9 ` nn
Drainage area: 233,675 SF { I}� C E Q u k bu
Proposed Impervious area: 46,620 SF u�j
Existing Impervoius area: 39,490 SF JUN 2 9 1995
Future Impervoius area: 23,857 SF D E M
Total Design Impervious area: 109,967 SF PROD SC>`�ZL M�31
or 47% impervoius
Using a "normal pool" depth of 3.5' and interpolating from the attached table, the required
surface area for 90% TSS removal is 4.7% of the drainage area.
233,675 SF X 47% = 10,983 SF
The surface area of the basin at normal pool (ELEV. 34.0'), as shown on the plans, is 11,049 SF.
The required volume of storage, based on the runoff from a 1" storm, from the elevation of the
principal spillway to normal pool is computed as follows:
Where:
A (SF) X C X 0.08333 FT/IN
A = area of subdrainage area
C = runoff coefficient of drainage sub area
= 1.00 for roofs
= 0.95 for paved areas (parking, sidewalks, etc.)
= 0.20 for planted areas (lawn, plantbeds, etc.)
17,005 SF roof X 1.00 X 0.08333 = 1417 CIF
92,692 SF paving X 0.95 X 0.08333 = 7338 CIF
123,708 SF planted areas X 0.20 X 0.08333 = 2062 CIF
TOTAL 10,817 CF
e69, 25
� �as
VA
p •. FVo I "E�..

The surface area of the basin, as shown on the plan, at a given elevation are as follows:
ELEVATION AREA
30.5 (bottom of basin)
6141 SF
31
6786 SF
32
8095 SF
33
9521 SF
34 (normal pool)
11049 SF
35
12674 SF
36 (top of dike)
14402 SF
CALCULATIONS FOR ONSLOW MEMORIAL HOSPITAL -URGENT CARE CENTER (cont.)
The volume of the basin above normal pool at any given elevation would be:
[(Al + A2 + (Al X A2)0 5) / 3] X (Elev.2 - Elev.1)
where: Al = area at normal pool elevation (Elev.1) in square feet
A2 = area at given elevation (Elev.2) in square feet
Elev.1 = normal pool elevation in feet = 34.00'
Elev.2 = elevation of interest in feet
The area at the principal spillway elevation (Elev.2 = 34.95) is 12589 SF.
The volume from normal pool elevation to the principal spillway elevation is:
Al = 11049 SF
A2 = 12589 SF
(At X A2)0.5 = 11794 SF
(Elev.2 - Elev.1) = 0.95'
V=11220CF
The principal spillway was designed to pass the 10 year storm and the emergency spillway was
designed to pass the 100 year storm, as shown on the attached computations.
The drawdown time from the principal spillway elevation to normal pool elevation shall be
between 2 days and 5 days.
The drawdown time can be estimated using the following formula from Elements of Urban
Stormwater Design (NCSU & H. Rooney Malcom,P.E. , 1989):
T = (As X Ho-5) / (60 AO)
where:
T = time in hours
As = weighted surface area ((Al + A2 (At X A2)05) / 3) in feet
H = (Elev.2 - Elev.1) in feet
Ao = orifice area In square inches

The times for the suitable pipe diameters are
PIPE SIZE DRAWDOWN TIME
1 1/2" 109 HOURS
2" 61 HOURS
The 1 1/2" pipe was selected because the drawdown time will be shortened by factors such as
infiltration into the ground or evaporation.
Therefor, the water quality basin meets the requirements of 15A NCAC 2H.1003 (g), (i), (k) and
(I).

aZ% 1DJ IU-NIUVAL
30 FOOT VEGETATED FILTER REQUIRED
DEPTH
Be %
3'
3.5'
4.0'
4.5'
5.0'
5.5'
6.0'
6.5'
7.0'
7.5'
10 %
.9
.8
.7
.6
.5
0
0
0
0
0
20 %
1.7
1.3
1.2
1.1
1.0
.9
.8
.7
.6
.5
30 %
2.5
2.2
1.9
1.8
1.6
1.5
1.3
1.2
1.0
.9
40 %
3.4
3.0
2.6
2.4
2.1
1.9
1.6
1.4
1.1
1.0
50 %
4.2
3.7
3.3
3.0
2.7
2.4
2.1
1.8
1.5
1.3
60 %
5.0
4.5
3.8
3.5
3.2
2.9
2.6
2.3
2.0
1.6
70 %
6.0
5.2
4.5
4.1
3:7
3.1
2.9
2.5
2.1
1.8
80 %
6.8
6.0
5.2
4.7
4.2
3.7
3.2
2.7
2.2
2.0
90 %
7.5
6.5
5.8
5.3
4.8
4.3
3.8
3.3
2.8
1.3
100 %
8.2
7.4
6.8
6.2
5.6
5.0
4.4
3.8
3.2
2.6
90% TSS REMOVAL -
NO VEGETATED FILTER REQUIRED
DEPTH
3'
3.5'
4.0'
4.5'
S.0'
S.5'
6.0'
6.5'
7.0'
7.5'
IMP %
10 %
1.3
1.0
.8
.7
.6
.5
.4
.3
20 %
2.4
2.0
1.8
1.7
1.5
1.4
1.2
1.0
.9
.6
30 %
3.5
3.0
2.7
2.5
2.2
1.9
1.6
1.3
1.1
.8
40 %
4.5
4.0
3.5
3.1
2.8
2.5
2.1
1 1.8
1.4
1.1
50 %
5.6
5.0
4.3
3.9
3.5
3.1
2.7
2.3
1.9
1.5
60 % -
7.0
6.0
5.3
4.8
4.3
3.9
3.4
2.9
2.4
1.9
70 %
8.1
7.0
6.0
5.5
5.0
4.5
3.9
3.4
2.9
2.3
80 %
9.4
8.0
7.0
6.4
5.7
5.2
4.6
4.0
3.4
2.8
90 %
10.7
9.0
6.5
5.9
5.2
4.6
3.9
3.3
100%
12.0
10.08.1
E7.97.2
?.3
6.6
5.8
5.1
4.3
3.6

CHECK PRINCIPAL SPILLWAY
2/23/95
HYDROGRAPH REPORT
RECORD NUMBER : 3
TYPE : RESER STOR. IND
DESCRIPTION : onslow out
[HYDROGRAPH INFORMATION]
Page 1
Peak
Discharge ............................ =
1.88
(cfs)
Volume .................................... =
0.23
(acft)
Time
Interval ............................. =
1
(min)
Time
to Peak .............................. =
28.00
(min)
Time
of Base .............................. =
1440.00
(min)
Peak
Elevation ............................ =
35.37
(ft)
[INFLOW HYDROGRAPH INFORMATION]
Hydrograph #.............................. = 1
Hydrograph Description .................... = onslow in 10yr 10 min
[Computation of Reservoir Outflow Table of Storage Indication Method]
(The time interval is 10 min)
INTV# TIMI
(miI
------
-- 2 2.1
3 3.1
13 13.1
23 23.1
33 33.1
43 43.1
53 53.1
63 63.1
73 73.1
83 83.1
93 93.1
103 103.1
113 113.1
123 123.1
133 133.1
143 143.1
153 153.1
163 163.1
173 173.1
183 183.(
193 193.1
203 203.1
-----------------------------------------------------------------------------------
INFLOW
EQUATION
OUTFLOW
STORAGE
ELEVATION
i) (cfs)
0.5(I1+I2)dt
+
S1-0.5(01)dt
= S2+0.5(02)dt
02(cfs)
(cuft)
(ft)
-----------------------------------------------------------------------------------
3.74
168.52
+
29767.65 =
30844.98
0.01
30844.65
34.10
5.62
280.87
+
30844.32 =
31125.19
0.01
31124.78
34.12
1 15.92
983.06
+
38352.80 =
39335.86
0.05
39334.32
34.82
1 6.55
421.31
+
45306.71 =
45728.01
1.53
45682.16
35.31
1 0.00
0.00
+
46041.98 =
46041.99
1.68
45991.70
35.34
1 0.00
0.00
+
45152.31 =
45152.31
1.28
45113.91
35.27
1 0.00
0.00
+
44464.66 =
44464.66
1.00
44434.80
35.22
1 0.00
0.00
+
43926.89 =
43926.89
0.79
43903.08
35.18
1 0.00
0.00
+
43492.38 =
43492.38
0.64
43473.04
35.14
1 0.00
0.00
+
43139.49 =
43139.49
0.52
43123.78
35.12
1 0.00
0.00
+
42852.59 =
42852.59
0.43
42839.65
35.10
I 0.00
0.00
+
42610.25 =
42610.26
0.37
42599.10
35.08
I 0.00
0.00
+
42401.31 =
42401.30
0.32
42391.68
35.06
I 0.00
0.00
+
42221.15 =
42221.15
0.28
42212.85
35.05
I 0.00
0.00
+
42065.83 =
42065.83
0.24
42058.68
35.03
I 0.00
0.00
+
41931.91 =
41931.92
0.21
41925.75
35.02
I 0.00
0.00
+
41816.45 =
41816.45
0.18
41811.14
35.01
I 0.00
0.00
+
41716.90 =
41716.90
0.15
41712.32
35.01
I 0.00
0.00
+
41631.08 =
41631.08
0.13
41627.13
35.00
I 0.00
0.00
+
41553.38 =
41553.38
0.13
41549.57
34.99
I 0.00
0.00
+
41478.50 =
41478.50
0.12
41474.83
34.99
I 0.00
0.00
+
41406.34 =
41406.34
0.12
41402.80
34.98

2/23/95
RECORD NUMBER
TYPE
DESCRIPTION
HYDROGRAPH REPORT
3
RESER STOR. IND
onslow out
Page 2
[Computation of Reservoir Outflow Table of Storage Indication Method]
(The time interval is 10 min)
-----------------------------------------------------------------------------------------------
INTV#
TIME
INFLOW
EQUATION
OUTFLOW
STORAGE
ELEVATION
(min)
(cfs)
0.5(I1+I2)dt
+
S1-0.5(01)dt =
S2+0.5(02)dt
02(cfs)
(cuft)
(ft)
-----------------------------------------------------------------------------------------------
213
213.0
0.00
0.00
+
41336.K =
41336.80
0.11
41333.39
34.98
223
223.0
0.00
0.00
+
41269.78 =
41269.78
0.11
41266.49
34.97
233
233.0
0.00
0.00
+
41205.20 =
41205.20
0.11
41202.04
34.97
243
243.0
0.00
0.00
+
41142.97 =
41142.96
0.10
41139.91
34.96
253
253.0
0.00
0.00
+
41082.98 =
41082.98
0.10
41080.04
34.96
263
263.0
0.00
0.00
+
41025.17 =
41025.17
0.09
41022.34
34.95
273
273.0
0.00
0.00
+
40969.46 =
40969.46
0.09
40966.73
34.95
283
283.0
0.00
0.00
+
40915.78 =
40915.78
0.09
40913.15
34.94
293
293.0
0.00
0.00
+
40864.05 =
40864.05
0.08
40861.52
34.94
303
303.0
0.00
0.00
+
40814.19 =
40814.19
0.08
40811.75
34.94
313
313.0
0.00
0.00
+
40766.14 =
40766.14
0.08
40763.79
34.93
323
323.0
0.00
0.00
+
40719.84 =
40719.84
0.08
40717.57
34.93
333
333.0
0.00
0.00
+
40675.21 =
40675.21
0.07
40673.02
34.92
343
343.0
0.00
0.00
+
40632.21 =
40632.21
0.07
40630.11
34.92
353
353.0
0.00
0.00
+
40590.77 =
40590.77
0.07
40588.73
34.92
363
363.0
0.00
0.00
+
40550.82 =
40550.82
0.07
40548.87
34.91
373
373.0
0.00
0.00
+
40512.33 =
40512.33
0.06
40510.45
34.91
383
383.0
0.00
0.00
+
40475.23 =
40475.23
0.06
40473.41
34.91
393
393.0
0.00
0.00
+
40439.48 =
40439.49
0.06
40437.73
34.91
403
403.0
0.00
0.00
+
40405.03 =
40405.03
0.06
40403.34
34.90
413
413.0
0.00
0.00
+
40371.83 =
40371.83
0.05
40370.20
34.90
423
423.0
0.00
0.00
+
40339.40 =
40339.40
0.05
40337.79
34.90
433
433.0
0.00
0.00
+
40307.05 =
40307.05
0.05
40305.43
34.89
443
443.0
0.00
0.00
+
40274.73 =
40274.73
0.05
40273.12
34.89
453
453.0
0.00
0.00
+
40242.47 =
40242.47
0.05
40240.86
34.89
463
463.0
0.00
0.00
+
40210.27 =
40210.27
0.05
40208.66
34.89
473
473.0
0.00
0.00
+
40178.11 =
40178.11
0.05
40176.50
34.88
483
483.0
0.00
0.00
+
40146.00 =
40146.00
0.05
40144.40
34.88
493
493.0
0.00
0.00
+
40113.95 =
40113.95
0.05
40112.35
34.88
503
503.0
0.00
0.00
+
40081.93 =
40081.94
0.05
40080.34
34.88
513
513.0
0.00
0.00
+
40049.98 =
40049.98
0.05
40048.38
34.87
523
523.0
0.00
0.00
+
40018.08 =
40018.08
0.05
40016.49
34.87
533
533.0
0.00
0.00
+
39986.21 =
39986.22
0.05
39984.62
34.87
543
543.0
0.00
0.00
+
39954.42 =
39954.42
0.05
39952.83
34.87
553
553.0
0.00
0.00
+
39922.67 =
39922.67
0.05
39921.09
34.86
563
563.0
0.00
0.00
+
39890.96 =
39890.96
0.05
39889.38
34.86
573
573.0
0.00
0.00
+
39859.32 =
39859.32
0.05
39857.73
34.86
583
583.0
0.00
0.00
+
39827.72 =
39827.72
0.05
39826.14
34.86
593
593.0
0.00
0.00
+
39796.16 =
39796.16
0.05
39794.58
34.85

2/23/95
RECORD NUMBER
TYPE
DESCRIPTION
HYDROGRAPH REPORT
:3
RESER STOR. IND
onslow out
Page 3
(Computation of Reservoir Outflow Table of Storage Indication Method]
(The time interval is 10 min)
-----------------------------------------------------------------------------------------------
INTV#
TIME
INFLOW
EQUATION
OUTFLOW
STORAGE
ELEVATION
(min)
(cfs)
0.5(I1+I2)dt
+
51-0.5(01)dt
= 52+0.5(02)dt
02(cfs)
(cuft)
(ft)
-----------------------------------------------------------------------------------------------
603
603.0
0.00
0.00
+
39764.67. =
39764.67
0.05
39763.10
34.85
613
613.0
0.00
0.00
+
39733.22 =
39733.22
0.05
39731.65
34.85
623
623.0
0.00
0.00
+
39701.82 =
39701.81
0.05
39700.25
34.85
633
633.0
0.00
0.00
+
39670.48 =
39670.48
0.05
39668.91
34.84
643
643.0
0.00
0.00
+
39639.17 =
39639.17
0.05
39637.61
34.84
653
653.0
0.00
0.00
+
39607.92 .=
39607.92
0.05
39606.36
34.84
663
663.0
0.00
0.00
+
39576.73 =
39576.73
0.05
39575.17
34.84
673
673.0
0.00
0.00
+
39545.56 =
39545.57
0.05
39544.01
34.83
683
683.0
0.00
0.00
+
39514.47 =
39514.47
0.05
39512.92
34.83
693
693.0
0.00
0.00
+
39483.43 =
39483.43
0.05
39481.88
34.83
703
703.0
0.00
0.00
+
39452.41 =
39452.41
0.05
39450.86
34.83
713
713.0
0.00
0.00
+
39421.47 =
39421.47
0.05
39419.92
34.82
723
723.0
0.00
0.00
+
39390.56 =
39390.56
0.05
39389.02
34.82
733
733.0
0.00
0.00
+
39359.70 =
39359.70
0.05
39358.16
34.82
743
743.0
0.00
0.00
+
39328.90 =
39328.90
0.05
39327.36
34.82
753
753.0
0.00
0.00
+
39298.14 =
39298.14
0.05
39296.60
34.81
763
763.0
0.00
0.00
+
39267.43 =
39267.43
0.05
39265.90
34.81
773
773.0
0.00
0.00
+
39236.77 =
39236.77
0.05
39235.24
34.81
783
783.0
0.00
0.00
+
.39206.15 =
39206.15
0.05
39204.62
34.81
793
793.0
0.00
0.00
+
39175.60 =
39175.60
0.05
39174.07
34.80
803
803.0
0.00
0.00
+
39145.08 =
39145.08
0.05
39143.56
34.80
813
813.0
0.00
0.00
+
39114.62 =
39114.61
0.05
39113.09
34.80
823
823.0
0.00
0.00
+
39084.21 =
39084.21
0.05
39082.69
34.80
833
833.0
0.00
0.00
+
39053.84 =
39053.84
0.05
39052.33
34.79
843
843.0
0.00
0.00
+
39023.53 =
39023.53
0.05
39022.02
34.79
853
853.0
0.00
0.00
+
38993.29 =
38993.28
0.05
38991.77
34.79
863
863.0
0.00
0.00
+
38963.09 =
38963.09
0.05
38961.58
34.79
873
873.0
0.00
0.00
+
38932.93 =
38932.93
0.05
38931.43
34.78
883
883.0
0.00
0.00
+
38902.85 =
38902.85
0.05
38901.34
34.78
893
893.0
0.00
0.00
+
38872.80 =
38872.80
0.05
38871.30
34.78
903
903.0
0.00
0.00
+
38842.81 =
38842.81
0.05
38841.31
34.78
913
913.0
0.00
0.00
+
38812.88 =
38812.88
0.05
38811.39
34.77
923
923.0
0.00
0.00
+
38783.00 =
38783.00
0.05
38781.51
34.77
933
933.0
0.00
0.00
+
38753.16 =
38753.16
0.05
38751.67
34.77
943
943.0
0.00
0.00
+
38723.39 =
38723.39
0.05
38721.90
34.77
953
953.0
0.00
0.00
+
38693.67 =
38693.67
0.05
38692.18
34.76
963
963.0
0.00
0.00
+
38663.98 =
38663.99
0.05
38662.50
34.76
973
973.0
0.00
0.00
+
38634.38 =
38634.37
0.05
38632.89
34.76
983
983.0
0.00
0.00
+
38604.81 =
38604.81
0.05
38603.33
34.76

2/23/95
RECORD NUMBER
TYPE
DESCRIPTION
HYDROGRAPH REPORT
3
RESER STOR. IND
onslow out
Page 4
[Computation of Reservoir Outflow Table of Storage Indication Method]
(The time interval is 10 min)
----------------------------
INTV# TIME INFLOW
(min) (cfs) 0.5(I
993
993.0
0.00 1
1003
1003.0
0.00
1013
1013.0
0.00
1023
1023.0
0.00
1033
1033.0
0.00
1043
1043.0
0.00
1053
1053.0
0.00
1063
1063.0
0.00
1073
1073.0
0.00
1083
1083.0
0.00
1093
1093.0
0.00
1103
1103.0
0.00
1113
1113.0
0.00
1123
1123.0
0.00
1133
1133.0
0.00
1143
1143.0
0.00
1153
1153.0
0.00
1163
1163.0
0.00
1173
1173.0
0.00
1183
1183.0
0.00 I
1193
1193.0
0.00 I
1203
1203.0
0.00 I
1213
1213.0
0.00 I
1223
1223.0
0.00 I
1233
1233.0
0.00 I
1243
1243.0
0.00 I
1253
1253.0
0.00 I
1263
1263.0
0.00 I
1273
1273.0
0.00 I
1283
1283.0
0.00 I
1293
1293.0
0.00 I
1303
1303.0
0.00 I
1313
1313.0
0.00 I
1323
1323.0
0.00 I
1333
1333.0
0.00 I
1343
1343.0
0.00 I
1353
1353.0
0.00 I
1363
1363.0
0.00 I
1373
1373.0
0.00 I
------------------------------------------------------------------
EQUATION
OUTFLOW
STORAGE
ELEVATION
I+I2)dt
+
51-0.5(01)dt =
S2+0.5(02)dt
02(cfs)
(cuft)
(ft)
------------------------------------------------------------------
).00
+
38575.28 =
38575.28
0.05
38573.81
34.76
).00
+
38545.83 =
38545.83
0.05
38544.36
34.75
).00
+
38516.42 =
38516.42
0.05
38514.95
34.75
).00
+
38487.05 =
38487.05
0.05
38485.59
34.75
).00
+
38457.75 =
38457.75
0.05
38456.29
34.75
).00
+
38428.50 =
38428.50
0.05
38427.04
34.74
).00
+
38399.28 =
38399.28
0.05
38397.82
34.74
).00
+
38370.14 =
38370.14
0.05
38368.68
34.74
).00
+
38341.03 =
38341.03
0.05
38339.58
34.74
).00
+
38311.97 =
38311.97
0.05
38310.52
34.73
).00
+
38282.98 =
38282.98
0.05
38281.54
34.73
).00
+
38254.03 =
38254.03
0.05
38252.59
34.73
).00
+
38225.13 =
38225.13
0.05
38223.69
34.13
).00
+
38196.29 =
38196.29
0.05
38194.85
34.72
).00
+
38167.49 =
38167.50
0.05
38166.06
34.72
).00
+
38138.75 =
38138.75
0.05
38137.31
34.72
).00
+
38110.06 =
38110.06
0.05
38108.63
34.72
).00
+
38081.41 =
38081.41
0.05
38079.98
34.71
).00
+
38052.82 =
38052.82
0.05
38051.39
34.71
).00
+
38024.28 =
38024.29
0.05
38022.86
34.71
).00
+
37995.79 =
37995.79
0.05
37994.36
34.71
).00
+
37967.35 =
37967.35
0.05
37965.93
34.71
).00
+
37938.96 =
37938.96
0.05
37937.54
34.70
).00
+
37910.61 =
37910.62
0.05
37909.20
34.70
).00
+
37882.32 =
37882.32
0.05
37880.91
34.70
).00
+
37854.09 =
37854.09
0.05
37852.68
34.70
).00
+
37825.90 =
37825.90
0.05
37824.50
34.69
).00
+
37797.77 =
37797.77
0.05
37796.37
34.69
KOO
+
37769.70 =
37769.70
0.05
37768.30
34.69
1.00
+
37741.67 =
37741.67
0.05
37740.27
34.69
).00
+
37713.70 =
37713.70
0.05
37712.30
34.68
).00
+
37685.78 =
37685.79
0.05
37684.39
34.68
).00
+
37657.91 =
37657.92
0.05
37656.52
34.68
).00
+
37630.10 =
37630.10
0.05
37628.71
34.68
).00
+
37602.35 =
37602.35
0.05
37600.96
34.68
).00
+
37574.63 =
37574.63
0.05
37573.25
34.67
).00
+
37546.98 =
37546.98
0.05
37545.59
34.67
).00
+
37519.38 =
37519.38
0.05
37518.00
34.67
).00
+
37491.81 =
37491.82
0.05
37490.44
34.67

2/23/95
RECORD NUMBER
TYPE
DESCRIPTION
i c 1142J97:»I1131
3
RESER STOR. IND
onslow out
Page 5
[Computation of Reservoir Outflow Table of Storage Indication Method]
(The time interval is 10 min)
-----------------------------------------------------------------------------------------------
INTV#
TIME
INFLOW
EQUATION
OUTFLOW
STORAGE
ELEVATION
(min)
(cfs)
0.5(I1+I2)dt
+
S1-0.5(01)dt
= S2+0.5(02)dt
02(cfs)
(cuft)
(ft)
-----------------------------------------------------------------------------------------------
1383
1383.0
0.00
0.00
+
37464.32. =
37464.32
0.05
37462.94
34.66
1393
1393.0
0.00
0.00
+
37436.87 =
37436.88
0.05
37435.50
34.66
1403
1403.0
0.00
0.00
+
37409.47 =
37409.48
0.05
37408.11
34.66
1413
1413.0
0.00
0.00
+
37382.13 =
37382.13
0.05
37380.77
34.66
1423
1423.0
0.00
0.00
+
37354.85 =
37354.85
0.05
37353.48
34.66
1433
1433.0
0.00
0.00
+
37327.60 =
37327:60
0.05
37326.24
34.65

WWI
20
LEGEND
18 onslow out
rr� ,----------• onslow in 10yx 10 min
V 16
W
14 '
12 ,
i
10
i
ui
H
i
6 '
I i
4
2'
L/ i
00 50 100 150 200 250
TIME (min)

CHECK EMERGENCY SPILLWAY
2/23/95
HYDROGRAPH REPORT
RECORD NUMBER : 3
TYPE : RESER STOR. IND
DESCRIPTION : onslow out
[HYDROGRAPH INFORMATION]
Page 1
Peak
Discharge ............................ =
4.71
(cfs)
Volume .................................... =
0.36
(acft)
Time
Interval ............................. =
1
(min)
Time
to Peak .............................. =
26.00
(min)
Time
of Base .............................. =
1440.00
(min)
Peak
Elevation ............................ =
35.66
(ft)
[INFLOW HYDROGRAPH INFORMATION]
Hydrograph #.............................. = 2
Hydrograph Description .................... = onslow in 100yr 10 min
[Computation of Reservoir Outflow Table of Storage Indication Method]
(The time interval is 10 min)
-----------------------------------------------------------------------------------------------
INTV#
TIME
INFLOW
EQUATION
OUTFLOW
STORAGE
ELEVATION
(min)
(cfs)
0.5(I1+I2)dt
+
S1-0.5(01)dt
= S2+0.5(02)dt
02(cfs)
(cuft)
(ft)
-----------------------------------------------------------------------------------------------
2
2.0
5.04
226.59
+
29768.35 =
30847.10
0.01
30846.77
34.10
3
3.0
7.55
377.66
+
30846.44 =
31224.09
0.01
31223.65
34.13
13
13.0
21.40
1321.79
+
40944.02 =
42265.81
0.29
42257.19
35.05
23
23.0
8.81
566.48
+
49489.30 =
50055.78
4.27
49927.55
35.63
33
33.0
0.00
0.00
+
49277.51 =
49277.51
3.58
49170.08
35.57
43
43.0
0.00
0.00
+
47507.97 =
47507.97
2.40
47436.11
35.44
53
53.0
0.00
0.00
+
46251.89 =
46251.89
1.78
46198.64
35.35
63
63.0
0.00
0.00
+
45311.76 =
45311.76
1.35
45271.38
35.28
73
73.0
0.00
0.00
+
44588.66 =
44588.66
1.05
44557.26
35.23
83
83.0
0.00
0.00
+
44025.14 =
44025.14
0.83
44000.31
35.18
93
93.0
0.00
0.00
+
43572.18 =
43572.18
0.67
43552.02
35.15
103
103.0
0.00
0.00
+
43204.30 =
43204.31
0.55
43187.93
35.12
113
113.0
0.00
0.00
+
42905.53 =
42905.52
0.44
42892.19
35.10
123
123.0
0.00
0.00
+
42655.89 =
42655.89
0.38
42644.39
35.08
133
133.0
0.00
0.00
+
42440.65 =
42440.65
0.33
42430.74
35.06
143
143.0
0.00
0.00
+
42255.07 =
42255.07
0.28
42246.53
35.05
153
153.0
0.00
0.00
+
42095.08 =
42095.08
0.25
42087.71
35.04
163
163.0
0.00
0.00
+
41957.13 =
41957.13
0.21
41950.78
35.03
173
173.0
0.00
0.00
+
41838.20 =
41838.19
0.18
41832.72
35.02
183
183.0
0.00
0.00
+
41735.65 =
41735.65
0.16
41730.93
35.01
193
193.0
0.00
0.00
+
41647.25 =
41647.25
0.14
41643.18
35.00
203
203.0
0.00
0.00
+
41568.69 =
41568.69
0.13
41564.86
35.00

2/23/95
RECORD NUMBER
TYPE
DESCRIPTION
HYDROGRAPH REPORT
3
RESER STOR. IND
onslow out
Page 2
[Computation of Reservoir Outflow Table of Storage Indication Method]
(The time interval is 10 min)
----------------------------
INTV# TIME INFLOW
(min) (cfs) 0.5(I
213
213.0
0.00 I
223
223.0
0.00 I
233
233.0
0.00 I
243
243.0
0.00 I
253
253.0
0.00 I
263
263.0
0.00 I
273
273.0
0.00 I
283
283.0
0.00 I
293
293.0
0.00 I
303
303.0
0.00 I
313
313.0
0.00 I
323
323.0
0.00 I
333
333.0
0.00 I
343
343.0
0.00 I
353
353.0
0.00 I
363
363.0
0.00 I
373
373.0
0.00 I
383
383.0
0.00 I
393
393.0
0.00 1
403
403.0
0.00 I
413
413.0
0.00 I
423
423.0
0.00 I
433
433.0
0.00 I
443
443.0
0.00 I
453
453.0
0.00 1
463
463.0
0.00 1
473
473.0
0.00 1
483
483.0
0.00 1
493
493.0
0.00 1
503
503.0
0.00 I
513
513.0
0.00 1
523
523.0
0.00 I
533
533.0
0.00 1
543
543.0
0.00 1
553
553.0
0.00 l
563
563.0
0.00 1
573
573.0
0.00
583
583.0
0.00
593
593.0
0.00 1
-----------------------------------------------------------------
EQUATION
OUTFLOW
STORAGE
ELEVATION
.+I2)dt
+
S1-0.5(01)dt
= S2+0.5(02)dt
02(cfs)
(cuft)
(ft)
-----------------------------------------------------------------
I.00
+
41493.26 =
41493.25
0.12
41489.56
34.99
1.00
+
41420.56 =
41420.56
0.12
41417.00
34.98
1.00
+
41350.50 =
41350.50
0.11
41347.07
34.98
1.00
+
41282.99 =
41282.99
0.11
41279.68
34.97
1.00
+
41217.93 =
41217.93
0.11
41214.74
34.97
1.00
+
41155.23 =
41155.23
0.10
41152.16
34.96
1.00
+
41094.80 =
41094.80
0.10
41091.84
34.96
1.00
+
41036.56 =
41036.56
0.10
41033.71
34.95
1.00
+
40980.44 =
40980.44
0.09
40977.69
34.95
1.00
+
40926.36 =
40926.36
0.09
40923.71
34.94
1.00
+
40874.25 =
40874.25
0.09
40871.69
34.94
1.00
+
40824.01 =
40824.02
0.08
40821.55
34.94
1.00
+
40775.61 =
40775.61
0.08
40773.24
34.93
1.00
+
40728.96 =
40728.96
0.08
40726.68
34.93
1.00
+
40684.00 =
40684.00
0.07
40681.80
34.92
1.00
+
40640.68 =
40640.68
0.07
40638.56
34.92
1.00
+
40598.94 =
40598.94
0.07
40596.89
34.92
1.00
+
40558.70 =
40558.70
0.07
40556.73
34.92
1.00
+
40519.91 =
40519.92
0.06
40518.02
34.91
1.00
+
40482.54 =
40482.54
0.06
40480.71
34.91
1.00
+
40446.53 =
40446.53
0.06
40444.77
34.91
1.00
+
40411.82 =
40411.82
0.06
40410.12
34.90
1.00
+
40378.37 =
40378.37
0.05
40376.73
34.90
1.00
+
40345.88 =
40345.88
0.05
40344.26
34.90
1.00
+
40313.51 =
40313.52
0.05
40311.90
34.90
1.00
+
40281.19 =
40281.19
0.05
40279.57
34.89
1.00
+
40248.92 =
40248.92
0.05
40247.30
34.89
1.00
+
40216.70 =
40216.70
0.05
40215.09
34.89
1.00
+
40184.53 =
40184.53
0.05
40182.93
34.89
1.00
+
40152.42 =
40152.42
0.05
40150.82
34.88
1.00
+
40120.35 =
40120.36
0.05
40118.75
34.88
1.00
+
40088.33 =
40088.33
0.05
40086.73
34.88
1.00
+
40056.37 =
40056.37
0.05
40054.77
34.87
1.00
+
40024.46 =
40024.46
0.05
40022.86
34.87
1.00
+
39992.58 =
39992.58
0.05
39990.99
34.87
1.00
+
39960.78 =
39960.78
0.05
39959.19
34.87
1.00
+
39929.01 =
39929.02
0.05
39927.43
34.86
1.00
+
39897.30 =
39897.30
0.05
39895.71
34.86
1.00
+
39865.64 =
39865.64
0.05
39864.06
34.86

2/23/95
RECORD NUMBER
TYPE
DESCRIPTION
HYDROGRAPH REPORT
3
RESER STOR. IND
onslow out
Page 3
[Computation of Reservoir Outflow Table of Storage Indication Method]
(The time interval is 10 min)
-----------------------------------------------------------------------------------------------
INTV#
TIME
INFLOW
EQUATION
OUTFLOW
STORAGE
ELEVATION
(min)
(cfs)
0.5(I1+I2)dt
+
S1-0.5(01)dt
= S2+0.5(02)dt
02(cfs)
(cuft)
(ft)
-----------------------------------------------------------------------------------------------
603
603.0
0.00
0.00
+
39834.03 =
39834.03
0.05
39832.45
34.86
613
613.0
0.00
0.00
+
39802.47 =
39802.47
0.05
39800.89
34.85
623
623.0
0.00
0.00
+
39770.97 =
39770.97
0.05
39769.39
34.85
633
633.0
0.00
0.00
+
39739.50 =
39739.51
0.05
39737.93
34.85
643
643.0
0.00
0.00
+
39708.10 =
39708.10
0.05
39706.53
34.85
653
653.0
0.00
0.00
+
39676.74 =
39676.74
0.05
39675.18
34.84
663
663.0
0.00
0.00
+
39645.42 =
39645.42
0.05
39643.86
34.84
673
673.0
0.00
0.00
+
39614.17 =
39614.17
0.05
39612.61
34.84
683
683.0
0.00
0.00
+
39582.96 =
39582.96
0.05
39581.40
34.84
693
693.0
0.00
0.00
+
39551.79 =
39551.79
0.05
39550.23
34.83
703
703.0
0.00
0.00
+
39520.69 =
39520.69
0.05
39519.14
34.83
713
713.0
0.00
0.00
+
39489.63 =
39489.63
0.05
39488.08
34.83
723
723.0
0.00
0.00
+
39458.61 =
39458.61
0.05
39457.06
34.83
733
733.0
0.00
0.00
+
39427.66 =
39427.66
0.05
39426.11
34.82
743
743.0
0.00
0.00
+
39396.73 =
39396.73
0.05
39395.19
34.82
753
753.0
0.00
0.00
+
39365.87 =
39365.87
0.05
39364.33
34.82
763
763.0
0.00
0.00
+
39335.06 =
39335.06
0.05
39333.52
34.82
773
773.0
0.00
0.00
+
39304.28 =
39304.28
0.05
39302.74
34.81
783
783.0
0.00
0.00
+
39273.57 =
39273.57
0.05
39272.04
34.81
793
793.0
0.00
0.00
+
39242.90 =
39242.90
0.05
39241.37
34.81
803
803.0
0.00
0.00
+
39212.28 =
39212.27
0.05
39210.74
34.81
813
813.0
0.00
0.00
+
39181.71 =
39181.71
0.05
39180.18
34.80
823
823.0
0.00
0.00
+
39151.18 =
39151.18
0.05
39149.65
34.80
833
833.0
0.00
0.00
+
39120.71 =
39120.71
0.05
39119.18
34.80
843
843.0
0.00
0.00
+
39090.29 =
39090.28
0.05
39088.77
34.80
853
853.0
0.00
0.00
+
39059.91 =
39059.91
0.05
39058.39
34.79
863
863.0
0.00
0.00
+
39029.60 =
39029.59
0.05
39028.08
34.79
873
873.0
0.00
0.00
+
38999.33 =
38999.33
0.05
38997.82
34.79
883
883.0
0.00
0.00
+
38969.12 =
38969.12
0.05
38967.61
34.79
893
893.0
0.00
0.00
+
38938.96 =
38938.96
0.05
38937.45
34.78
903
903.0
0.00
0.00
+
38908.86 =
38908.86
0.05
38907.36
34.78
913
913.0
0.00
0.00
+
38878.80 =
38878.81
0.05
38877.30
34.78
923
923.0
0.00
0.00
+
38848.81 =
38848.80
0.05
38847.30
34.78
933
933.0
0.00
0.00
+
38818.87 =
38818.87
0.05
38817.37
34.77
943
943.0
0.00
0.00
+
38788.97 =
38788.97
0.05
38787.48
34.77
953
953.0
0.00
0.00
+
38759.13 =
38759.12
0.05
38757.63
34.77
963
963.0
0.00
0.00
+
38729.34 =
38729.34
0.05
38727.86
34.77
973
973.0
0.00
0.00
+
38699.60 =
38699.61
0.05
38698.12
34.77
983
983.0
0.00
0.00
+
38669.92 =
38669.92
0.05
38668.43
34.76

2/23/95
RECORD NUMBER
TYPE
DESCRIPTION
HYDROGRAPH REPORT
3
RESER STOR. IND
onslow out
Page 4
[Computation of Reservoir Outflow Table of Storage Indication Method]
(The time interval is 10 min)
-----------------------------------------------------------------------------------------------
INTV# TIME
INFLOW
EQUATION
OUTFLOW
STORAGE
ELEVATION
(min)
(cfs)
0.5(I1+I2)dt
+
51-0.5(01)dt
= 52+0.5(02)dt
02(cfs)
(cuft)
(ft)
-----------------------------------------------------------------------------------------------
993
993.0
0.00
0.00
+
38640.30 =
38640.30
0.05
38638.82
34.76
1003
1003.0
0.00
0.00
+
38610.71 =
38610.72
0.05
38609.24
34.76
1013
1013.0
0.00
0.00
+
38581.19 =
38581.18
0.05
38579.71
34.76
1023
1023.0
0.00
0.00
+
38551.72 =
38551.72
0.05
38550.25
34.75
1033
1033.0
0.00
0.00
+
38522.30 =
38522.30
0.05
38520.83
34.75
1043
1043.0
0.00
0.00
+
38492.92 "=
38492.92
0.05
38491.45
34.75
1053
1053.0
0.00
0.00
+
38463.61 =
38463.61
0.05
38462.15
34.75
1063
1063.0
0.00
0.00
+
38434.34 =
38434.34
0.05
38432.88
34.74
1073
1073.0
0.00
0.00
+
38405.12 =
38405.12
0.05
38403.66
34.74
1083
1083.0
0.00
0.00
+
38375.96 =
38375.96
0.05
38374.51
34.74
1093
1093.0
0.00
0.00
+
38346.84 =
38346.84
0.05
38345.39
34.74
1103
1103.0
0.00
0.00
+
38317.78 =
38317.78
0.05
38316.33
34.73
1113
1113.0
0.00
0.00
+
38288.78 =
38288.78
0.05
38287.33
34.73
1123
1123.0
0.00
0.00
+
38259.81 =
38259.81
0.05
38258.37
34.73
1133
1133.0
0.00
0.00
+
38230.91 =
38230.91
0.05
38229.46
34.73
1143
1143.0
0.00
0.00
+
38202.06 =
38202.06
0.05
38200.62
34.72
1153
1153.0
0.00
0.00
+
38173.25 =
38173.25
0.05
38171.81
34.72
1163
1163.0
0.00
0.00
+
38144.50 =
38144.50
0.05
38143.06
34.72
1173
1173.0
0.00
0.00
+
38115.80 =
38115.80
0.05
38114.36
34.72
1183
1183.0
0.00
0.00
+
38087.13 =
38087.13
0.05
38085.70
34.72
1193
1193.0
0.00
0.00
+
38058.54 =
38058.53
0.05
38057.11
34.71
1203
1203.0
0.00
0.00
+
38029.99 -
38029.99
0.05
38028.56
34.71
1213
1213.0
0.00
0.00
+
38001.48 =
38001.48
0.05
38000.06
34.71
1223
1223.0
0.00
0.00
+
37973.04 =
37973.04
0.05
37971.61
34.71
1233
1233.0
0.00
0.00
+
37944.63 =
37944.63
0.05
37943.21
34.70
1243
1243.0
0.00
0.00
+
37916.28 =
37916.28
0.05
37914.86
34.70
1253
1253.0
0.00
0.00
+
37887.98 =
37887.98
0.05
37886.57
34.70
1263
1263.0
0.00
0.00
+
37859.73 =
37859.74
0.05
37858.32
34.70
1273
1273.0
0.00
0.00
+
37831.54 =
37831.54
0.05
37830.13
34.69
1283
1283.0
0.00
0.00
+
37803.40 =
37803.40
0.05
37801.99
34.69
1293
1293.0
0.00
0.00
+
37775.31 =
37775.31
0.05
37773.91
34.69
1303
1303.0
0.00
0.00
+
37747.27 =
37747.28
0.05
37745.88
34.69
1313
1313.0
0.00
0.00
+
37719.30 =
37719.30
0.05
37717.90
34.69
1323
1323.0
0.00
0.00
+
37691.36 =
37691.36
0.05
37689.97
34.68
1333
1333.0
0.00
0.00
+
37663.48 =
37663.48
0.05
37662.09
34.68
1343
1343.0
0.00
0.00
+
37635.66 =
37635.66
0.05
37634.27
34.68
1353
1353.0
0.00
0.00
+
37607.90 =
37607.90
0.05
37606.51
34.68
1363
1363.0
0.00
0.00
+
37580.17 =
37580.17
0.05
37578.79
34.67
1373
1373.0
0.00
0.00
+
37552.51 =
37552.51
0.05
37551.12
34.67

2/23/95
RECORD NUMBER
TYPE
DESCRIPTION
lot :i1 .:1 ' . 1 ' fill
3
RESER STOR. IND
onslow out
Page 5
[Computation of Reservoir Outflow Table of Storage Indication Method]
(The time interval is 10 min)
-----------------------------------------------------------------------------------------------
INTV#
TIME
INFLOW
EQUATION
OUTFLOW
STORAGE
ELEVATION
(min)
(cfs)
0.5(I1+I2)dt
+
S1-0.5(01)dt
= S2+0.5(02)dt
02(cfs)
(tuft)
(ft)
-----------------------------------------------------------------------------------------------
1383
1383.0
0.00
0.00
+
37524.89 =
37524.90
0.05
37523.52
34.67
1393
1393.0
0.00
0.00
+
37497.32 =
37497.32
0.05
37495.94
34.67
1403
1403.0
0.00
0.00
+
37469.82 =
37469.82
0.05
37468.44
34.66
1413
1413.0
0.00
0.00
+
37442.36 =
37442.36
0.05
37440.99
34.66
1423
1423.0
0.00
0.00
+
37414.95 =
37414.95
0.05
37413.58
34.66
1433
1433.0
0.00
0.00
+
37387.60 .=
37387.60
0.05
37386.23
34.66

HYDROGRAPH
30
e
25
U
W
20
15
T�
4i 1
10
5
00
50
100 150 200 250
TIME (min)
LEGEND
onslaw out
----------• onslow in 100yr 10 min
1}
I,
I,
I,
I,
I ,
r ,
I �
I ,
I ,
r ,
I ,
, I
I L
I
�
I ,
I �
I
�
I ,
I ,
I
,
I ,
r ,
r ,
I �
I I
I ,
I ,
r
,
I ,
,
r ,
I
i
I
I

State of North Carolina
Department, of Environment, Health, and Natural Resources
Wilmington Regional Office
James B. Hunt, Jr., Governor DIVISION OF ENVIRONMENTAL MANAGEMENT Bob Jamieson
Jonathan B. Howes, Secretary WATER QUALITY SECTION Regional Manager
April 3, 1995/��
Mr. Don Kennedy, P.E.
Bass, Nixon & Kennedy, Inc.
7416 Chapel Hill Road
Raleigh, North Carolina 27607
Subject: ADDITIONAL INFORMATION
Stormwater Project No. SW8 950317
Onslow Memorial Hospital Urgent Care
Onslow County
Dear Mr. Kennedy:
The Wilmington Regional Office received a Stormwater Submittal for the Onslow Memorial
Hospital Urgent Care on March 20, 1995. A preliminary review of that information has determined that
the submittal for the subject project is not complete. The following information is needed to continue
the stormwater review:
1. North Carolina registered Professional Engineers seal on the calculation cover sheet.
2. Please clearly delineate the drainage area for this project on the plans. Include any off -site
or existing areas, such as parts of Memorial Drive, that drain to the proposed pond, and
account for them in the volume.
3. Please shade or highlight the new pavement areas.
4. Please dimension the pond
5. Please slo the outlet spillway so that it is not flat, and add a trash rack to prevent
accumulated trash from entering downstream waters.
�r o� 127 Cardinal Drive Extension, Wilmington. N.C. 28405-3845 0 Telephone [phone] Fax [phone]
An Equal Opportunity Affirmative Action Employer

Mr. Kennedy
April 3, 1995
Stormwater Project No. SW8 950317
Please note that this request for additional information is in response to a preliminary review. The
requested information should be received by this Office prior to May 3, 1995, or the submittal will be
returned as incomplete.
If you have any questions concerning this matter please feel free to call me at [phone].
Sincerely,
Ms. Linda Lewis
Environmental Engineer
DA/arl: S:\WQS\STORMWAT\ADDINFO\950317.APR
cc: (2)Linda Lewis
Central Files
2

TO
BASS, NIXON & KENNEDY, INC. LE(D L� u u EM ODI u UMMO u IML
CONSULTING ENGINEERS LI9pS1 MAR 2 0 19�5
©7416 CHAPEL HILL ROAD
RALEIGH, NORTH CAROLINA 27607
919/851-4422. FAX [phone]---------------------------
GENTLEMEN:
WE
ARE SENDING YOU
❑
Attached ❑
Under separate cover via the following items:
❑
Shop drawings
❑
Prints
❑ Plans ❑ Samples ❑ Specifications
❑
Copy of letter
❑
Change order
❑
THESE ARE TRANSMITTED as checked below:
❑ For approval
❑ For your use
❑ As requested
or review and comment
FOR BIDS DUE
❑ Approved as submitted
❑ Approved as noted
❑ Returned for corrections
0
❑ Resubmit copies for approval
❑ Submit copies for distribution
❑ Return corrected prints
19 ❑ PRINTS RETURNED AFTER LOAN TO US
REMARKS A% q173rr'hrTc� n n7n9!4" 11 n Poa
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MAR 2 u^ 1995
DFM
PROJ # Sw r? 9503/'7
COPY TO _
SIGNED:
H anebsums an naf No r md, kindly �tfy ua ar ant@ 1

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o_ I MILE
_ ROAD CLASSIFICATION
)00 _I ------- hi 300 3oun 4000 s000 B000 7000 FEET Primary highway, Y. Light -duty road, hard or s 'O
T--=F'----==='-=+- ---T= ==== ==--1 hard surface improved surface
o _ 1 hlLomeTrR Secondary highway, - - -
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OUR INTERVAL 5 FEET ^e•���_ hard surface Unimproved road..
)DETIC VERTICAL DATUM OF 1929 F`ll\/\J `jiff{ 1tI1�iAgttl9�(/'I �9nterstate Route Su �'I �11 �,j U. S. Route State Route
N C J f1i' I5 IS 11
QUADRANGLE LOCATION InS ODJACKSONVILLE NORTH, N. C.,
_O N3445—W7722.5/7.5
NATIONAL MAP ACCURACY STANDARDS UUGICAL SURVEY,RESTON,VIRGINIA 22092 MAR 2'0 1995
'HIC MAPS AND SYMBOLS IS AVAILABLE ON REQUEST 1978
DENT
PROI clUX9503t% AMS 5553 IV SW —SERIES V842