HomeMy WebLinkAbout95 Development Permit 437 Silverado Oil Management GroupNOV-22-1996 13:51 FROM HESTER ENGINEERING CO. TO
Date: 11I2 2 I 9 6
HESTER ENGINEERING COMPANY
7607 EASTMARK DRIV~ SUITE 253-B
COLLEGE STATION, 1EXAS 77840
Ph: ( 409) 693-1100
Fax: ( 409) 693-1075
From: Michael G. Hester, P.E.
To: Veronica Morgan, P.E., Assistant City Engineer
Re: College Station Library -Desperado Oil Company
Fire Flow Analysis
Dear V,
CS ENGR. P.01
About a month ago I prepared and submitted a fire flow analysis
for the proposed College Station Library .. Since that time Steve
Homeyer has stated that it was reviewed and approved however Steve
requested that an analysis of the Desperado Oil Company site which is
adjacent to the Library be done to assure that the proposed 8" line is
of sufficient capacity. I spoke with John Meece, C.S.F.D. Marshall and
he stated that a 1200 GPM demand would be sufficient for fire
protection of the site.
I have analyzed the system with the required demand and the
proposed pipe is sized properly. At your earliest convenience please
review the information and call with any questions and/or approve the
report.
If approved please insert this information into the original
report.
Submitted,
.~~ P.E:
Au.achments: Addition to Original Report
Copies To: Brett Mccully
1 of 6 Sheets
22 .7 • fl£:NO
' I
l
I
_/
1200 a'M r:it::MN-J?
fO!i! r:it::~moG OIL-CO.
l"!;I( C.5 .f V. ~l
..x:IHN Mtf;a, 11122196.
PRE:P .Aa;l? ~Y :
Michael a. Hester, P ,E:.,
HE:5feR f;NulNf::f;l(INa COMPMJY
7607 E:.A5f~ !?RIVE:. 5Ulfe 2?~-~
COL.t-E:aE: 5fA110N, IX 118.etO
( 409) 69~-1100 fo( 409) 6~-1017
f'.a:: !?EP~Mf:Nf 5Wlfit; CONNOCflON
ro ~ WCA-n'.17 f'l::R fli:t: 5P~Nl\l..~ mreM
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fl~L.INE:
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1676-'I 5.F . ) '~ (
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COL..L.~C1~ 5fAflON L..IBRARY:
rorx.. f~ FL.ON fO 511f ~QUl<!:WIE.Nf5:
fll<E FL.ON -18-0'1'( A"O.?)
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-l~C-.( 2~000 5f. "'0.'7 > U..11MAfE r:it::vt:L.OPMf:Nf
-l~O&t"l?B
-2211 Cl'M
L.ON fir¢ HAZAICV -~x :
-2217 a'M ... o.~o -II~ £<PM
f.)(p~ PW!UflaJ ct IOX
-II~• 1.10 -1272 tAPM
li!Ol.Nt:7 fO 2'30 CPM -1 2~ CPM .
z
0 c
I
l\J
l\J
I .......
l.D
l.D
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.......
VJ ..
Vl .......
11 ;:a
0
3
I m
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-j m ;:a
m z
Cl -z m m ;:a -z
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_ ............................. ______________________________ ~~~
NOV-22-1996 13:52 FROM HESTER ENGINEERING CO. TO CS ENGR. P. 03
************************************************
SUMMARY 0 F 0 R I G I N A L DAT A
************************************************
CyberNet Version 2.18. Copyright 1991,92 Haestad Methods Inc.
Run Description: Basic Network
Drawing: CSL-H20
P I P E L I N E DAT A
STATUS CODE: XX -CLOSED PIPE
CV -CHECK VALVE
BN -BOUNDARY NODE PU -PUMP LINE
PIPE
NUMBER
70-BN
80
90
100
NODE NOS.
#1 #2
0
100
110
110
100
110
120
130
JUNCTION N 0 D E
JUNCTION
NUMBER
100-1
110-1
120-1
130-1
JUNCTION
TITLE
FH NO. 1
TEE
FH NO. 2
BUILDING
RV -REGULATING VALVE
LENGTH
(ft)
215.0
218.0
330.0
150.0
DAT A
EXTERNAL
DEMAND
(gpm)
1200.00
0.00
0.00
0.00
DIAMETER
(in)
8.0
8.0
8.0
6.0
ROUGHNESS
COEFF.
150.00
150.00
150.00
150.00
JUNCTION
MINOR LOSS
COEFF.
3.20
1. 50
2.10
3.00
ELEVATION CONNECTING PIPES
(ft)
276.00
275.00
273.00
276.00
70
80
90
100
80
90 100
BND-HGL
(ft)
515.70
NOU-22 -1996 13:52 FROM HESTER ENGINEERING CO . TO
+-----------------------------------------------+
MAXIMUM DIMENSIONS
Number of pipes .. .. . . .. ... .. ... . ..... 25
Number of pumps . . . . . . . . . . . . . . . . . . . . . . 1 o
Number junction nodes................. 25
Flow meters . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Boundary nodes . . . . . . . . . .. ... . . . .. . . . . 10
Variable storage tanks .. . .. ... . .... .. 10
Pressure switches . . . . . . . . . . . . . . . . . . . . 10
Regulating Valves..................... 10
Items for limited output . ... ..... .. . . 25
limit for non -consecutive numbering . . 270
+-----------------------------------------------+
Cybernet version 2.18. SN: 1132184437-25
Extended Description:
U N I T S S P E C I F I E D
FLOWRATE ............ ~gallons/minute
HEAD (HGL) . . . . . . . . . . = feet
PRESSURE ............ ~ psig
0 U T P U T 0 P T I 0 N DAT A
CS ENGR. P. 04
OUTPUT SELECTION: THE FOLLOWING RESULTS ARE INCLUDED IN THE TABULATED OUTPUT
ALL CLOSED PIPES ARE NOTED
ALL PIPES WITH PUMPS
FOLLOWING PIPES
70 80 90 100
FOLLOWING JUNCTION NODES
100 110 120 130
MAXIMUM AND MINIMUM PRESSURES
S Y S T E M C 0 N F I G U R A T I 0 N
=
NUMBER OF PIPES ................... (p) 4
NUMBER OF JUNCTION NODES .......... (j) ~ 4
NUMBER OF PRIMARY LOOPS ........... (1 ) = 0
NUMBER OF BOUNDARY NODES .......... (f) ~ 1
NUMBER OF SUPPLY ZONES ............ (z) = 1
2
*************************************
S I M U L A T I 0 N R E S U L T S
*************************************
The results are obtained after 2 trials with an accuracy 0.00000
NOU-22-1996 13:52 FROM HESTER ENGINEERING CO. TO CS ENGR. P.05
S I M U L A T I 0 N D E S C R I P T I 0 N
CyberNet Version 2.18. Copyright 1991,92 Haestad Methods Inc.
Run Description: Basic Network
Drawing: CSL-H20
P I P E L I N E R E S U L T S
STATUS CODE: BN -BOUNDARY NODE PU -PUMP LINE XX -CLOSED PIPE
CV -CHECK VALVE RV -REGULATING VALVE TK -STORAGE TANK
PIPE
NUMBER
70-BN
80
90
100
NODE NOS.
#1 #2
0
100
110
110
100
110
120
130
FLOWRATE
(gpm)
1200.00
0.00
0.00
0.00
HEAD
LOSS
(ft)
4.22
0.00
0.00
0.00
JUNCTION N 0 D E R E S U L T S
JUNCTION
NUMBER
JUNCTION
TITLE
100-1 FH NO. l
110-1 TEE
120-l FH NO. 2
130-1 BUILDING
MAX I M UM AN
p RE s s u R E
D
s
EXTERNAL
DEMAND
(gpm)
1200.00
0.00
0.00
0.00
M I N I
HYDRAULIC
GRADE
(ft)
MUM
508.57
508.57
508.57
508.57
VAL
PUMP
HEAD
(ft)
MINOR
LOSS
(ft)
LINE
VELO.
(ft/s)
0.00
0.00
0.00
0.00
JUNCTION
ELEVATION
(ft)
U E
276.00
275.00
273.00
276.00
s
2.91
0.00
0.00
0.00
7.66
0.00
0.00
0.00
PRESSURE
HEAD
(ft)
232.57
233.57
235.57
232.57
JUNCTION MAXIMUM JUNCTION MINIMUM
NUMBER PRESSURES NUMBER PRESSURES
(psi) (psi)
------------------------------------------
120 102.08 100 100.78
110 101.21 130 100.78
SUMMARY 0 F I N F L 0 W S AND 0 U T F L 0 W S
(+) INFLOWS INTO THE SYSTEM FROM BOUNDARY NODES
(-) OUTFLOWS FROM THE SYSTEM INTO BOUNDARY NODES
PIPE
NUMBER
FLOWRATE
(gpm)
HL/
1000
(ft/ft)
19.64
0.00
0.00
0.00
JUNCTION
PRESSURE
(psi)
100.78
101.21
102.08
100.78
NOU-22-1996 13:53 FROM HESTER ENGINEERING CO.
~ I \ lo
--------------------
70
NET SYSTEM INFLOW ;
NET SYSTEM OUTFLOW =
NET SYSTEM DEMAND ~
1200.00
1200.00
0.00
1200.00
**** CYBERNET SIMULATION COMPLETED ****
DATE: 11/22/1996
TIME: 11:30:48
TO CS ENGR. P. 06
DRAINAGE REPORT FOR
__ COLLEGE STATION LIBRARY
800 F.M. 2818
DESPERADO OIL CO. INC.
700 F.M. 2818
COLLEGE STATION, BRAZOS COUNTY,
TEXAS
APPROVED FOR
Submitted By:
Michael G. Hester, P.E.
Hester Engineering Company
7607 Eastmark Drive, Suite 253-8
College Station, TX 77840
( 409) 693-1100
CERTIFICATION
I hereby certify that this report and accompanying
drainage plan for the drainage design was prepared by me in
accordance with the provisions of the Cities Drainage Policy
and Design Standards for the owners thereof.
(l·2051b
-+~~+--,-~~~~-+-~~~~
1 G. Hest r, P.E.
ered Professional Engineer No. 69104
of Texas
COLLEGE STATION LIBRARY -DESPERADO OIL CO. -CERTIFICATION
DRAINAGE ANALYSIS
INTRODUCTION
TABLE OF CONTENTS
EXISTING DRAINAGE BASIN DESCRIPTION
PROPOSED DRAINAGE
CONCLUSION
KEY MAP
SITE DRAWING Cl
DRAINAGE MAPS
PREDEVELOPMENT CONDITIONS
DRAINAGE AREA RUNOFF CALCULATIONS
POSTDEVELOPMENT CONDITIONS
DRAINAGE AREA RUNOFF CALCULATIONS
BEE CREEK CROSS SECTION
DRAINAGE STRUCTURES
DS-1
DS-2
DS-4
DESPERADO OIL CO. DRAINAGE PLAN
TABLE OF CONTENTS
DRAINAGE ANALYSIS
COLLEGE STATION LIBRARY -800 F.M. 2818
DESPERADO OIL COMPANY -700 F.M. 2818
COLLEGE ST A TION, TX
NOVEMBER, 1996
INTRODUCTION:
The proposed development is located along F.M. 2818 at the
the intersection of Welsh Street. The legal description is
Southwood Valley Section 30, Lots Al and A2 and is 8.86 acres.
The proposed improvements include a 16008 square foot Library
building, a convience store/gas station, parking and the
associated infrastructure. The drainage area consists of
grassland with numerous large oak trees. The terrain slopes in a
southerly direction toward Bee Creek Tributary B with an average
grade of about 1 .0%. The latest Flood Insurance Rate Maps
(48041C0182 C) shows that a portion of the tract is in the
regulatory 100 -year flood plain. The site is zoned commercial and
is being developed by the City of College Station, Chalie Shear,
9960 S. Texas Avenue, College Station, Tx 77842, (409) 764-3500
and Desperado Oil Co., Inc .
EXISTING DRAINAGE BASIN DESCRIPTION:
The proposed development is located in the Bee Creek
Drainage Basin No. 5, Regulatory Channel Reach No . I which is a
primary channel. The 100 year Current Condition Discharge is 2955
cubic feet per second (cfs) and the Ultimate is 4855 cfs, Table
III-6, College Station "DRAINAGE SYSTEM ANALYSIS". The minimum
floor elevation for this channel reach is Base Flood plus 4 feet,
page 11, College Station "DRAINAGE POLICY AND DESIGN STANDARDS".
There are four storm drainage pathways for the site. Area A
flows toward Welsh Street, Area B flows east along F.M. 2818,
Area C, the majority of the runoff from the site flows south to
Bee Creek and Area D flows toward Welsh Street. A graphic of the
existing drainage area's is included in the appendix "DRAINAGE
MAPS".
PROPOSED DRAINAGE:
The proposed design will route the majority of the runoff
across the site via driveways and discharge it into a proposed
storm sewer system where it will discharge into Bee Creek.
Predevelopment and postdevelopment conditions were
calculated to determine the additional runoff generated. The
ultimate development of the site will generate a QlOO of 43. 62
cfs but will only contribute an additional 19.6 cfs because 24.02
cfs is being released from the site under existing conditions .
With regard to impacting down stream property owners, the
additional runoff generated by the improvements to this site was
analyzed to determine if the water surf ace elevation changed due
to the proposed improvements. The cross section chosen as the
COLLEGE STATION LIBRARY, DESPERADO OIL CO. PAGE 1 OF 2 PAGES
point of interest was at the southern most property line of the
College Station Library property.
Two analysis were ran, the first was an analysis at
existing flow and the second analysis was ran with the additional
runoff from the proposed improvements. Below is a table showing a
summary of the results before and after the proposed
improvements.
PRED EVELOPMENT
CONDITIONS
QlOO
(CFS)
WATER SURFACE
ELEVATION
3000 273.28
POST DEVELOPMENT Q 100 WATER SURFACE
ELEVATION CONDITIONS (CFS)
3020 273.29
The additional runoff for the site will raise the water
surface elevation of Bee Creek by 0.01 feet for QlOO . See
Appendix 11 BEE CREEK CROSS SECTION". The table shows that the
additional flow generated by the proposed improvements will not
change the water surf ace elevation and therefore, detention is
not required nor planned for the site. Storm runoff calculations
for pre and post-development conditions, an analysis of the Bee
Creek cross section and storm drain pipe calculations have been
included for your review.
CONCLUSION:
This project is in compliance with the City's Stormwater
Design Standards.
COLLEGE STATION LIBRARY, DESPERADO OIL CO. PAGE 2 OF 2 PAGES
HIG H SCHOOL
ESPE RADO
OIL CO.
t
N
BEE CREEK
CHURCH
K~Y MP?
COLLEGE
STATION
LIBRARY
COll~Ut; 5f Af ~ON ~!rBRARY
800 f .M. 2818
t?f;5PE:RAt?O O~l CO,J ~NCO
700 f .M. 2818
COL.L.fc:if 51AflO NJ r?RAZ05 COUNIYJ
n:XA5
NOVfMr?ft<J 1996
. i
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Q'.'.
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3
TRACl 8
SOUTHWOOD VAL LO' sec 30
VOL 21 10 PG 168
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STATION
PUBLIC
LIBRARY
~ft.\Tfcnl',~
Hi DELL
A I S 0 C I lo T ( S
A I CNI J[C J I
.-.... 96000
~~,l~~=~-1=-"'ir._:_-::-----, c 1
.. i:_·o;;c_=_~=<"'_-_~ __ • -_-_.'7.._"-:'_::i_-_'lll_.-_ .. _·-____ . ~~~ .
DRAINAGE MAPS
COLLEGE ST A TION LIBRARY -DESPERADO OIL CO., INC.
2 81 .1 ..... ----' ' ' ' '
+
278.
-\-
X-18"RCP
-----·----------' ' '
f .M. 2818 276 .9
--------------
__________________________________ ,
~ ARf A I?
+276 .8 5.48 ,AC
0 .6? ,AC , IMPeRV .
2 .85 ,AC, PeRV .
<so--~
~AC
6.88 ,AC, PeRVIOU5
c::ll \
'
~ ' • • 27 4 .8 + • + • 275 .1 I •
----PRf Df Vf L-OP Mf Nf CONDl110N5
COL-L-fc:Af 51 A110N L-IBRARY
'800 f.M. 2818
NO\/eMBC::R, 1996
281.1 f.M. 2818 276 .9
-----------------------------------~ c:!J \ .... -----------------------·----------' ' ' ' '
278 .
• I
I
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AReA !?
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0 .% .AC . IMPE:l<V.
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274.8 ..\--\-
I.BB .AC . l'el<V. O 275. 1 .
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: I ""' t:le5f' ,AR,AVO OIL. 51-rt ; ,,,,. ~I 1 At(!;A C .,-;; . I I I I Z.18 ,AC,
I "-• • "'\ 0.44 ,AC . l'el<V. #-ril
I \ 1.74 .AC. IMPE:l<V . ·~
W At(!;A I? ' ,,r•.. ~ /7 ~-'
OA9/'C. '-••# I "1 #~
OA!? .AC . IMPE:l<V . ~ ## ~ ~---•#
: I 0.04 .AC . l'el<V . f ,·
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. ~-----·-··-1-#~ •••• I ·-.. _.# ~----·-.·---.. .... ,A.Rl;A ~ ... ~·~·~·~•,.,...._,.._._..~-~~#cv-v--v---v?<:-rv~~,,.-.,.r-v
P05WfVfL-OPMfNf C0Nt71110N
COL-L-feif 51 AflON L-IBRARY
800 f .M. 2818
NOV~Ml?E:R, 1996
PREDEVELOPMENT CONDITIONS
COLLEGE STATION LIBRARY • DESPERADO OIL CO., INC.
Quick TR-55 Ver.5.44
Executed: 13:58:29
S/N:l315430080
11-25-1996 -
COLLEGE STATION LIBRARY
PRE DEVELOPMENT CONDITIONS
AREA A
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
Runoff
IC'
PERVIOUS 0.300
IMPERVIOUS 0.900
Area
acres
0.50
0.14
Tc
(min)
Wtd.
I c I
10.00 0.431
RETURN FREQUENCY = 5 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in/hr
0.431 7.690
Total
acres
0.64
Peak Q
(cf s)
2.12
Quick TR-55 Ver.5.44
Exectlted: 13:58£29
S/N:1315430080
11-25-1996 -
COLLEGE STATION LIBRARY
PRE DEVELOPMENT CONDITIONS
AREA A
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
Runoff
IC'
PERVIOUS 0.300
IMPERVIOUS 0.900
Area
acres
0.50
0.14
Tc
(min)
Wtd .
IC'
10.00 0.431
RETURN FREQUENCY = 10 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in/hr
0 .431 8.630
Total
acres
0.64
Peak Q
(cf s)
2.38
Quick TR-55 Ver.5.44
Execu-ted: 13: 58 :29
S/N:l315430080
11-25-1996
COLLEGE STATION LIBRARY
PRE DEVELOPMENT CONDITIONS
AREA A
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
Runoff
IC'
Area
acres
PERVIOUS 0.300 0.50
IMPERVIOUS 0.900 0.14
Tc
(min)
Wtd.
IC'
10.00 0.431
RETURN FREQUENCY = 25 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in/hr
0 .43 1 9.860
Total
acres
0 .64
Peak Q
(cfs)
2.72
Quick TR-55 Ver.5.44
Executed: 13:58:29
S/N:1315430080
11-25-1996
COLLEGE STATION LIBRARY
PRE DEVELOPMENT CONDITIONS
AREA A
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
Runoff
IC'
PERVIOUS 0.300
IMPERVIOUS 0.900
Area
acres
0.50
0.14
Tc
(min)
Wtd.
, C'
10.00 0.431
RETURN FREQUENCY = 50 years
'C' adjustment, k = 1
Adj. 'C' = Wtd .'C' x 1
========================= ========
Adj. I
'C' in/hr
0.431 10.860
Total
acres
0.64
Peak Q
(cfs)
3.00
Quick TR-55 Ver.5.44 S/N:1315430080
Executed : 13:58:29 · 11-25-1996
COLLEGE STATION LIBRARY
PRE DEVELOPMENT CONDITIONS
AREA A
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, !=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
Runoff
IC I
PERVIOUS 0.300
IMPERVIOUS 0.900
Area
acres
0.50
0.14
Tc
(min)
Wtd .
'C'
10.00 0 .431
RETURN FREQUENCY = 100 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in/hr
0.431 11.640
Total
acre s
0 .64
Peak Q
(cf s)
3.21
Quick TR-55 Ver.5.44
Executed: ~3:58:56
S/N:1315430080
·11-25-1996 .
COLLEGE STATION LIBRARY
PRE DEVELOPMENT CONDITIONS
AREA B
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
Runoff
IC'
PERVIOUS 0.300
IMPERVIOUS 0.900
Area
acres
2.83
0.65
Tc
(min)
Wtd.
'C'
10.00 0.412
RETURN FREQUENCY = 5 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in/hr
0.412 7.690
Total
acres
3.48
Peak Q
(cfs)
11.03
.Quick TR-55 Ver.5.44
Executed: 13:58:56
S/N:1315430080
11-25-1996
COLLEGE STATION LIBRARY
PRE DEVELOPMENT CONDITIONS
AREA B
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
Runoff
I c I
PERVIOUS 0.300
IMPERVIOUS 0.900
Area
acres
2.83
0.65
Tc
(min)
Wtd.
IC'
10.00 0.412
RETURN FREQUENCY = 10 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in/hr
0.412 8.630
Total
acres
3.48
Peak Q
(cfs)
12.38
Quick TR-55 Ver.5.44
Executed: 13:58:56
S/N:l315430080
11-25-1996
COLLEGE STATION LIBRARY
PRE DEVELOPMENT CONDITIONS
AREA B
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
Runoff
IC'
PERVIOUS 0.300
IMPERVIOUS 0.900
Area
acres
2.83
0.65
Tc
(min)
Wtd .
IC'
10.00 0.412
RETURN FREQUENCY = 25 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in/hr
0.412 9 .860
Total
acres
3 .48
Peak Q
(cf s)
14.14
Quick TR-55 Ver.5.44
Executed: 13:58:56
S/N:l315430080
11-25-1996
COLLEGE STATION LIBRARY
PRE DEVELOPMENT CONDITIONS
AREA B
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
Runoff
IC'
PERVIOUS 0.300
IMPERVIOUS 0.900
Area
acres
2.83
0.65
Tc
(min)
Wtd.
'C'
10.00 0.412
RETURN FREQUENCY = 50 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in/hr
0.412 10.860
Total
acres
3 .48
Peak Q
(cfs)
15.57
Quick TR-55 Ver..5.44
Executed: 13:58:56
S/N:1315430080
11-25-1996
COLLEGE STATION LIBRARY
PRE DEVELOPMENT CONDITIONS
AREA B
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
Runoff
IC'
PERVIOUS 0.300
IMPERVIOUS 0.900
Area
acres
2.83
0.65
Tc
(min)
Wtd.
'C'
10.00 0.412
RETURN FREQUENCY = 100 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in/hr
0.412 11.640
Total
acres
3.48
Peak Q
(cfs)
16.69
Quick TR-55 Ver.5.44
Executed: 14:00:27
S/N:l315430080
11-25-1996
COLLEGE STATION LIBRARY
PRE DEVELOPMENT CONDITIONS
AREA C
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
PERVIOUS
Runoff
IC'
0.300
Area
acres
6.88
Tc
(min)
Wtd.
'C'
10.00 0.300
RETURN FREQUENCY = 5 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in/hr
0.300 7.690
Total
acres
6.88
Peak Q
(cf s)
15.87
Quick TR-55 Ver.5_44
Executed: 14:00:27
S/N:l315430080
11-25-1996
COLLEGE STATION LIBRARY
PRE DEVELOPMENT CONDITIONS
AREA C
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
PERVIOUS
Runoff
'C'
0.300
Area
acres
6.88
Tc
(min)
Wtd.
IC'
10.00 0.300
RETURN FREQUENCY = 10 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in/hr
0.300 8.630
Total
acres
6.88
Peak Q
(cfs)
17.81
Quick TR-55 Ver.5.44
Executed: 14:00:27
S/N:1315430080
11-25-1996
COLLEGE STATION LIBRARY
PRE DEVELOPMENT CONDITIONS
AREA C
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
PERVIOUS
Runoff
IC'
0.300
Area
acres
6.88
Tc
(min)
Wtd.
'C'
10.00 0.300
RETURN FREQUENCY = 25 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in/hr
0.300 9.860
Total
acres
6 .88
Peak Q
(cf s)
20.35
Quick TR-55 Ver.5.44 _ S/N:l315430080
Executed: 14:00:27 11-25-1996
COLLEGE STATION LIBRARY
PRE DEVELOPMENT CONDITIONS
AREA C
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
PERVIOUS
Runoff
IC'
0.300
Area
acres
6.88
Tc
(min)
Wtd.
'C'
10.00 0.300
RETURN FREQUENCY = 50 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in/hr
0.300 10.860
Total
acres
6.88
Peak Q
(cfs)
22.42
Quick TR-55 Ver.5.44 -S/N:1315430080
Executed: 14:00:27 11-25-1996
COLLEGE STATION LIBRARY
PRE DEVELOPMENT CONDITIONS
AREA C
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
PERVIOUS
Runoff
I c I
0.300
Area
acres
6.88
Tc
(min)
Wtd.
'C'
10.00 0.300
RETURN FREQUENCY = 100 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in/hr
0.300 11.640
Total
acres
6.88
Peak Q
(cf s)
24.02
Quick TR-55 Ver.5.44
Executed: 13:59:50
S/N:l315430080
11-25-1996
COLLEGE STATION LIBRARY
PRE DEVELOPMENT CONDITIONS
AREA D
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
PERVIOUS
Runoff
IC'
0.300
Area
acres
0.41
Tc
(min)
Wtd.
I c I
10.00 0.300
RETURN FREQUENCY = 5 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in/hr
0.300 7.690
Total
acres
0.41
Peak Q
(cf s)
0.95
Quick TR-55 Ver.5.44
Executed: 13:59:50
S/N:131543008.0
11-25-1996
COLLEGE STATION LIBRARY
PRE DEVELOPMENT CONDITIONS
AREA D
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
PERVIOUS
Runoff
IC'
0.300
Area
acres
0.41
Tc
(min)
Wtd.
I c I
10.00 0.300
RETURN FREQUENCY = 10 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in/hr
0.300 8.630
Total
acres
0.41
Peak Q
(cfs)
1. 06
Quick TR-55 Ver.5.44
Executed: 13:59:50
S/N.: 1315430080 ..
11-25-1996
COLLEGE STATION LIBRARY
PRE DEVELOPMENT CONDITIONS
AREA D
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
PERVIOUS
Runoff
IC'
0.300
Area
acres
0.41
Tc
(min)
Wtd.
IC'
10.00 0.300
RETURN FREQUENCY = 25 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in/hr
0.300 9.860
Total
acres
0.41
Peak Q
(cf s)
1.21
Quick TR-55 Ver.5.44
Executed: 13:59:50
S/N:1315430080
11-25-1996
COLLEGE STATION LIBRARY
PRE DEVELOPMENT CONDITIONS
AREA D
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
PERVIOUS
Runoff
IC'
0.300
Area
acres
0.41
Tc
(min)
Wtd.
I c I
10.00 0.300
RETURN FREQUENCY = 50 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in/hr
0.300 10.860
Total
acres
0.41
Peak Q
(cfs)
1. 34
I
I
I
Quick TR-55 Ver.5.44
Executed: 13:59:50
S/N: 13-15430080
11-25-1996
COLLEGE STATION LIBRARY
PRE DEVELOPMENT CONDITIONS
AREA D
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, !=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
PERVIOUS
Runoff
IC'
0.300
Area
acres
0.41
Tc
(min)
Wtd.
IC'
10.00 0.300
RETURN FREQUENCY = 100 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in/hr
0.300 11.640
Total
acres
0.41
Peak Q
(cf s)
1. 43
I
I
I
POSTDEVELOPMENT CONDITIONS
COLLEGE STATION LIBRARY -DESPERADO OIL CO., INC.
Quick TR~55 Ver.5.44
Executed: 14:12:24
S/N:l315430080
11-25-1996
COLLEGE STATION LIBRARY
POST DEVELOPMENT CONDITIONS
AREA A
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
Runoff
I c I
PERVIOUS 0.300
IMPERVIOUS 0.900
Area
acres
0.97
0.28
Tc
(min)
Wtd.
I c I
10.00 0.434
RETURN FREQUENCY = 5 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in/hr
0.434 7.690
Total
acres
1. 25
Peak Q
(cf s)
4.18
Quick TR-55 Ver.5.44
Executed: 14:12:24
-S/N: 1315430080
11-25-1996
COLLEGE STATION LIBRARY
POST DEVELOPMENT CONDITIONS
AREA A
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
Runoff
IC'
PERVIOUS 0.300
IMPERVIOUS 0.900
Area
acres
0.97
0.28
Tc
(min)
Wtd.
I c I
10.00 0.434
RETURN FREQUENCY = 10 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in/hr
0.434 8.630
Total
acres
1. 25
Peak Q
(cf s)
4.69
Quick TR-55 Ver.5.44
Executed: 14:12:24
S./N: 131543 0080
11-25-1996
COLLEGE STATION LIBRARY
POST DEVELOPMENT CONDITIONS
AREA A
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Sub area
Descr.
Runoff
IC'
PERVIOUS 0.300
IMPERVIOUS 0.900
Area
acres
0.97
0.28
Tc
(min)
Wtd.
IC'
10.00 0.434
RETURN FREQUENCY = 25 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in/hr
0.434 9.860
Total
acres
1. 25
Peak Q
(cfs)
5.35
Quick -TR-SS Ver.5.44
Executed: 14:12:24
S/N:131S430080
11-2S-1996
COLLEGE STATION LIBRARY
POST DEVELOPMENT CONDITIONS
AREA A
* * * * * * SUMMA.RY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
Runoff
IC'
PERVIOUS 0.300
IMPERVIOUS 0.900
Area
acres
0.97
0.28
Tc
(min)
Wtd.
IC'
10.00 0.434
RETURN FREQUENCY = SO years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in/hr
0.434 10.860
Total
acres
1. 2S
Peak Q
(cfs)
S.90
Quick TR-55 Ver.5.44
Executed: 14:12:24
S/N:1315430080
11-25-1996
COLLEGE STATION LIBRARY
POST DEVELOPMENT CONDITIONS
AREA A
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
Runoff
IC'
PERVIOUS 0.300
IMPERVIOUS 0.900
Area
acres
0.97
0.28
Tc
(min)
Wtd.
IC'
10.00 0.434
RETURN FREQUENCY = 100 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in/hr
0. 434 11. 640
Total
acres
1. 25
Peak Q
(cfs)
6.32
-Quick TR-55 Ver.5.44
Executed: 14:13:08
S/N:1315430080
11-25-1996
COLLEGE STATION LIBRARY
POST DEVELOPMENT CONDITIONS
AREA B
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
RETURN FREQUENCY = 5 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Subarea
Descr.
Runoff
I c I
Area
acres
PERVIOUS 0.300 1.88
IMPERVIOUS 0.900 0.56
Tc
(min)
Wtd.
I c I
10.00 0.438
Adj. I
'C' in/hr
0.438 7.690
Total
acres
2.44
Peak Q
(cf s)
8.21
-Ouick TR-5~ Ver.5.44
Executed: 14:13:08
. S/N: 1315430080
11-25-1996
COLLEGE STATION LIBRARY
POST DEVELOPMENT CONDITIONS
AREA B
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
Runoff
IC'
PERVIOUS 0.300
IMPERVIOUS 0.900
Area
acres
1. 88
0.56
Tc
(min)
Wtd.
IC'
10.00 0.438
RETURN FREQUENCY = 10 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in/hr
0.438 8.630
Total
acres
2.44
Peak Q
(cf s)
9.22
Quick TR-55 Ver.5.44
Executed: 14:13:08
S/N:l315430080
11-25-1996
COLLEGE STATION LIBRARY
POST DEVELOPMENT CONDITIONS
AREA B
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
Runoff
IC'
PERVIOUS 0.300
IMPERVIOUS 0.900
Area
acres
1. 88
0.56
Tc
(min)
Wtd.
IC'
10.00 0.438
RETURN FREQUENCY = 25 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in/hr
0.438 9.860
Total
acres
2.44
Peak Q
(cf s)
10.53
Quick TR-55 Ver.5.44 S/N:1315430080
Executed: 14:13:08 11-25-1996
COLLEGE STATION LIBRARY
POST DEVELOPMENT CONDITIONS
AREA B
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
Runoff
I c I
Area
acres
PERVIOUS 0.300 1.88
IMPERVIOUS 0.900 0.56
Tc
(min)
Wtd.
I c I
10.00 0.438
RETURN FREQUENCY = 50 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in/hr
0.438 10.860
Total
acres
2.44
Peak Q
(cf s)
11.60
Quick TR-55 Ver·. 5. 44
Executed: 14:13:08
S/N-: 1315430080 ·
11-25-1996
COLLEGE STATION LIBRARY
POST DEVELOPMENT CONDITIONS
AREA B
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
Runoff
IC'
Area
acres
PERVIOUS 0.300 1.88
IMPERVIOUS 0.900 0.56
Tc
(min)
Wtd.
IC'
10.00 0.438
RETURN FREQUENCY = 100 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in/hr
0.438 11.640
Total
acres
2 .44
Peak Q
(cf s)
1 2.43
Quick ·TR-55 Ver.5.44
Executed: 14:15:01
S/N:1315430080
11-25-1996
COLLEGE STATION LIBRARY
POST DEVELOPMENT CONDITIONS
AREA C
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, !=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
Runoff
IC'
PERVIOUS 0.300
IMPERVIOUS 0.900
Area
acres
0.44
1. 74
Tc
(min)
Wtd.
IC'
10.00 0.779
RETURN FREQUENCY = 5 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in/hr
0.779 7.690
Total
acres
2.18
Peak Q
(cf s)
13.06
Quick TR-55 Ver.5.44
Executed: 14:15:01
S/N:1315430080
11-25-1996
COLLEGE STATION LIBRARY
POST DEVELOPMENT CONDITIONS
AREA C
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
Runoff
I c I
PERVIOUS 0.300
IMPERVIOUS 0.900
Area
acres
0.44
1. 74
Tc
(min)
Wtd.
'C'
10.00 0.779
RETURN FREQUENCY = 10 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in/hr
0.779 8.630
Total
acres
2.18
Peak Q
(cfs)
14.65
Quick TR-55 Ver.5.44
Executed: 14:15:01
S/N:l315430080
11-25-1996
COLLEGE STATION LIBRARY
POST DEVELOPMENT CONDITIONS
AREA C
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C ' adjustment factor for each return frequency
Subarea
Descr.
Runoff
'C'
PERVIOUS 0.300
IMPERVIOUS 0.900
Area
acres
0.44
1. 74
Tc
(min)
Wtd.
'C'
10.00 0.779
RETURN FREQUENCY = 25 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in/hr
0.779 9.860
Total
acres
2.18
Peak Q
(cfs)
16 .74
Quick TR-55 Ver.5.44 · S/N:1315430080
Executed: 14:15:01 11-25-1996
COLLEGE STATION LIBRARY
POST DEVELOPMENT CONDITIONS
AREA C
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
Runoff
IC'
Area
acres
PERVIOUS 0.300 0.44
IMPERVIOUS 0.900 1.74
Tc
(min)
Wtd.
'C'
10.00 0.779
RETURN FREQUENCY = 50 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in/hr
0.779 10.860
Total
acres
2.18
Peak Q
(cf s)
18.44
Quick TR-55 Ver.5.44
Executed: 14:15:01
8/N:l315430080
11-25-1996
COLLEGE STATION LIBRARY
POST DEVELOPMENT CONDITIONS
AREA C
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
Runoff
I c I
Area
acres
PERVIOUS 0.300 0.44
IMPERVIOUS 0.900 1.74
Tc
(min)
Wtd.
IC'
10.00 0.779
RETURN FREQUENCY = 100 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in/hr
0.779 11.640
Total
acres
2.18
Peak Q
(cfs)
19.76
Quick TR-55 Ver.5.44
Executed: 14:15:32
B/N:l315430080
11-25-1996
COLLEGE STATION LIBRARY
POST DEVELOPMENT CONDITIONS
AREA D
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
Runoff
I c I
PERVIOUS 0.300
IMPERVIOUS 0.900
Area
acres
0.04
0.45
Tc
(min)
Wtd.
'C'
10.00 0.851
RETURN FREQUENCY = 5 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in/hr
0 .851 7.690
Total
acres
0.49
Peak Q
(cfs)
3.21
Quick TR-55 Ver.5.44
Executed: 14:15:32
S/N:1315430080
11-25-1996
COLLEGE STATION LIBRARY
POST DEVELOPMENT CONDITIONS
AREA D
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
Runoff
I c I
Area
acres
PERVIOUS 0.300 0.04
IMPERVIOUS 0.900 0.45
Tc
(min)
Wtd.
'C'
10.00 0.851
RETURN FREQUENCY = 10 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in/hr
0.851 8.630
Total
acres
0.49
Peak Q
(cf s)
3 .60
Quick TR-55 Ver.5.44
Executed: 14:15:32
S/N: 131-543 008 0
11-25-1996
COLLEGE STATION LIBRARY
POST DEVELOPMENT CONDITIONS
AREA D
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
Runoff
, C'
PERVIOUS 0.300
IMPERVIOUS 0.900
Area
acres
0.04
0.45
Tc
(min)
Wtd. , c,
10.00 0.851
RETURN FREQUENCY = 25 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in/hr
0.851 9.860
Total
acres
0.49
Peak Q
(cf s)
4.11
Quick TR-55 Ver.5.44
Executed: 14:15:32
S/N:1315430080
11-25-1996
COLLEGE STATION LIBRARY
POST DEVELOPMENT CONDITIONS
AREA D
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
Runoff
IC'
PERVIOUS 0.300
IMPERVIOUS 0.900
Area
acres
0.04
0.45
Tc
(min)
Wtd.
I c I
10.00 0.851
RETURN FREQUENCY = 50 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in /hr
0.851 10.860
Total
acres
0 .49
Peak Q
(cf s)
4 .53
Quick TR-55 -Ver.5.44
Executed: 14:15:32
B/N:1315430080
11-25-1996
COLLEGE STATION LIBRARY
POST DEVELOPMENT CONDITIONS
AREA D
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
Runoff
IC'
Area
acres
PERVIOUS 0.300 0.04
IMPERVIOUS 0 .900 0.45
Tc
(min)
Wtd.
I c I
10.00 0.851
RETURN FREQUENCY = 100 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in/hr
0. 851 11. 640
Total
acres
0 .49
Peak Q
(cfs)
4.85
Quick TR-55 Ver.5.44
Executed: 14:16:07
S/N:1315430080
11-25-1996
COLLEGE STATION LIBRARY
POST DEVELOPMENT CONDITIONS
AREA E
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
RETURN FREQUENCY = 5 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Subarea
Descr.
Runoff
'C'
Area
acres
PERVIOUS 0.300 0.04
IMPERVIOUS 0.900 0.04
Tc
(min)
Wtd.
'C'
10.00 0.600
Adj. I
'C' in/hr
0.600 7.690
Total
acres
0.08
Peak Q
(cf s)
0.37
Quick TR-55 Ver.5.44
Executed: 14:16:07
S/N:l315430080
11 -25-1996
COLLEGE STATION LIBRARY
POST DEVELOPMENT CONDITIONS
AREA E
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
Runoff
, C'
Area
acres
PERVIOUS 0.300 0.04
IMPERVIOUS 0.900 0.04
Tc Wtd.
(min) 'C'
10.00 0.600
RETURN FREQUENCY = 10 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I Total
'C' in/hr acres ___________ ) __________ _
0.600 8.630 0.08
Peak Q
(cf s)
0.41
Quick _TR-55 Ver.5.44 S/N:l315430080
Executed: 14:16:07 11-25-1996
COLLEGE STATION LIBRARY
POST DEVELOPMENT CONDITIONS
AREA E
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
Runoff
I c I
Area
acres
PERVIOUS 0.300 0 .04
IMPERVIOUS 0.900 0.04
Tc
(min)
Wtd .
'C'
10.00 0.600
RETURN FREQUENCY = 25 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj . I
'C' in/hr
0.600 9.860
Total
acres
0.08
Peak Q
(cf s)
0 .47
Quick TR-55 Ver.5.44
Executed: 14:16:07
S/N: 131-5430080
11-25-1996
COLLEGE STATION LIBRARY
POST DEVELOPMENT CONDITIONS
AREA E
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
Runoff
IC'
PERVIOUS 0.300
IMPERVIOUS 0.900
Area
acres
0.04
0.04
Tc
(min)
Wtd.
'C'
10.00 0.600
RETURN FREQUENCY = 50 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in/hr
0.600 10.860
Total
acres
0 .08
Peak Q
(cfs)
0.52
-Ouick TR-55 Ver.5.44
Executed: 14:16:07
S/N:1315430080
11-25-1996
COLLEGE STATION LIBRARY
POST DEVELOPMENT CONDITIONS
AREA E
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
Runoff
'C'
PERVIOUS 0.300
IMPERVIOUS 0.900
Area
acres
0.04
0.04
Tc
(min)
Wtd.
'C'
10.00 0.600
RETURN FREQUENCY = 100 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in/hr
0.600 11.640
Total
acres
0.08
Peak Q
(cf s)
0.56
Quick TR-55 Ver.5.44
Executed: 14:17:28
S/N:1315430080
11-25-1996
COLLEGE STATION LIBRARY
POST DEVELOPMENT CONDITIONS
AREA F
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
PERVIOUS
Runoff
'C'
0.300
Area
acres
0.02
Tc
(min)
Wtd.
IC I
10.00 0.300
RETURN FREQUENCY = 5 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in/hr
0.300 7.690
Total
acres
0.02
Peak Q
(cf s)
0.05
Quick ·TR-55 Ver.5.44
Executed: 14:17:28
S/N:1315430080
11-25-1996
COLLEGE STATION LIBRARY
POST DEVELOPMENT CONDITIONS
AREA F
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
PERVIOUS
Runoff
IC'
0.300
Area
acres
0.02
Tc
(min)
Wtd.
IC'
10.00 0.300
RETURN FREQUENCY = 10 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in/hr
0.300 8.630
Total
acres
0.02
Peak Q
(cf s)
0.05
Quick TR-55 Ver.5.44
Executed: 14:17:28
S/N:1315430080
11-25-1996
COLLEGE STATION LIBRARY
POST DEVELOPMENT CONDITIONS
AREA F
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
PERVIOUS
Runoff
IC'
0.300
Area
acres
0.02
Tc
(min)
Wtd.
IC'
10.00 0.300
RETURN FREQUENCY = 25 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in/hr
0.300 9.860
Total
acres
0 .02
Peak Q
(cfs)
0.06
Quick TR-55 Ver.5.44
Executed: 14:17:28
S/N:l315430080
11-25-1996
COLLEGE STATION LIBRARY
POST DEVELOPMENT CONDITIONS
AREA F
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
PERVIOUS
Runoff
'C'
0.300
Area
acres
0.02
Tc
(min)
Wtd.
IC'
10.00 0.300
RETURN FREQUENCY = 50 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in/hr
0.300 10.860
Total
acres
0.02
Peak Q
(cf s)
0.07
Quick TR-55 Ver.5.44
Executed: 14:17:28
S/N:1315430080
11-25-1996
COLLEGE STATION LIBRARY
POST DEVELOPMENT CONDITIONS
AREA F
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
PERVIOUS
Runoff
I c I
0.300
Area
acres
0.02
Tc
(min)
Wtd.
IC'
10.00 0.300
RETURN FREQUENCY = 100 years
'C' adjustment, k = 1
Adj. 'C' = Wtd. 'C' x 1
========================= ========
Adj. I
'C' in/hr
0.300 11.640
Total
acres
0.02
Peak Q
(cfs)
0.07
Qu-ick TR-55 Ver. 5. 44
Executed: 14:18:53
S/N:l315430080
11-25-1996
COLLEGE STATION LIBRARY
POST DEVELOPMENT CONDITIONS
TOTAL AREA G TO BEE CREEK
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
Runoff
I c I
PERVIOUS 0.300
IMPERVIOUS 0.900
Area
acres
5.32
2.39
Tc
(min)
Wtd.
I c I
10.00 0.486
RETURN FREQUENCY = 5 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in/hr
0.486 7.690
Total
acres
7.71
Peak Q
(cf s)
28.81
Quick TR-55 Ver ~5.44
Executed: 14:18:53
S/N~l315430080 ·
11-25-1996
COLLEGE STATION LIBRARY
POST DEVELOPMENT CONDITIONS
TOTAL AREA G TO BEE CREEK
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
Runoff
IC'
PERVIOUS 0.300
IMPERVIOUS 0.900
Area
acres
5.32
2.39
Tc
(min)
Wtd.
IC'
10.00 0.486
RETURN FREQUENCY = 10 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in/hr
0.486 8.630
Total
acres
7.71
Peak Q
(cfs)
32 .34
Quick TR-55 Ver.5.44
Executed: 14:18:53
S/N:1315430080
11-25-1996
COLLEGE STATION LIBRARY
POST DEVELOPMENT CONDITIONS
TOTAL AREA G TO BEE CREEK
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
Runoff
IC'
PERVIOUS 0.300
IMPERVIOUS 0.900
Area
acres
5.32
2.39
Tc
(min)
Wtd.
'C'
10.00 0.486
RETURN FREQUENCY = 25 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in/hr
0.486 9.860
Total
acres
7.71
Peak Q
(cf s)
36.95
Quick TR-55 Ver.5.44 · S/N:1315430080
Executed: 14:18:53 11-25-1996
COLLEGE STATION LIBRARY
POST DEVELOPMENT CONDITIONS
TOTAL AREA G TO BEE CREEK
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
Runoff
IC'
PERVIOUS 0.300
IMPERVIOUS 0.900
Area
acres
5.32
2.39
Tc
(min)
Wtd.
IC'
10.00 0.486
RETURN FREQUENCY = 50 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in/hr
0.486 10.860
Total
acres
7.71
Peak Q
(cfs)
40.69
Quick TR-55 Ver.5.44
Executed: 14:18:53
·· S/N:l31543-0080
11-25-1996
COLLEGE STATION LIBRARY
POST DEVELOPMENT CONDITIONS
TOTAL AREA G TO BEE CREEK
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
Runoff
I c I
PERVIOUS 0.300
IMPERVIOUS 0.900
Area
acres
5.32
2.39
Tc
(min)
Wtd.
IC'
10.00 0.486
RETURN FREQUENCY = 100 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in/hr
0.486 11.640
Total
acres
7.71
Peak Q
(cfs)
43.62
BEE CREEK CROSS SECTION
COLLEGE ST A TION LIBRARY • DESPERADO OIL CO., INC.
BEE CREEK CROSS SECTION WORK SHEET ··
Worksheet for Irregular Channel
Project Description
Project File c:\haestad\fmw\csl.fm2
Worksheet BEE CREEK CROSS SECTION
Flow Element Irregular Channel
Method Manning's Formula
Solve For Water Elevation
Input Data
Channel Slope 0.002000 ft/ft
Elevation range: 265.00 ft to 280.00 ft .
Station (ft)
0.00
Elevation (ft)
278.00
276.00
274 .00
272.00
272 .00
272.00
270.00
268.00
266.00
265.00
266.00
268.00
270 .00
272 .00
272 .70
274 .00
276 .00
278 .00
280.00
Start Station
75.00
110.00
152 .00
192.00
215.00
245 .00
260 .00
265 .00
270 .00
275 .00
280 .00
295 .00
328.00
345.00
392.00
448.00
485.00
532.00
0.00
110.00
215 .00
245 .00
295 .00
328 .00
345 .00
392 .00
485 .00
Discharge 3,001.00 cf s
Results
Wtd. Mannings Coefficient
Water Surface Elevation
Flow Area
Wetted Perimeter
Top Width
Height
Critical Depth
Critical Slope
Velocity
Velocity Head
Specific Energy
Froude Number
Flow is subcritical.
0.020
273 .28
531 .87
242 .14 ft
240 .73 ft
8.28 ft
272.62 ft
0.005065 tuft
5.64 fUs
0.49 ft
273 .77 ft
0.67
End Station
110.00
215.00
245.00
295.00
328 .00
345 .00
392 .00
485 .00
532 .00
Roughness
0.040
0 .010
0 .040
0 .030
0 .040
0 .010
0 .040
0 .010
0 .040
11/25/96
02 :33 :02 PM Haestad Methods , Inc . 37 Brookside Road Waterbury , CT 06708 (203) 755-1666
FlowMaster v5.13
Page 1 of 2
11/25/96
02 :33 :02 PM
BEE CREEK CROSS-SECTION WORK SHEET
Worksheet for Irregular Channel
Haestad Methods , Inc. 37 Brookside Road Waterbury , CT 06708 (203) 755-1666
FlowMaster v5 .13
Page 2 of 2
BEE CREEK CROSS SECTION TABLE
Rating Table for Irregular Channel
Project Description
Project File c:\haestad\fmw\csl.fm2
Worksheet BEE CREEK CROSS SECTION
Flow Element Irregular Channel
Method Manning's Formula
Solve For Water Elevation
Constant Data
Channel Slope 0.002000 ft/ft
Input Data
Minimum Maximum
Discharge 3,000.00 5,000.00
Rating Table
Discharge
(cfs)
~ 3,000.00
3,500 .00
4 ,000.00
4 ,500 .00
___.. 5,000.00
Wtd. Mannings
Coefficient
0.020
0.020
0.019
0.019
0.019
Increment
500 .00 cfs
Water Surface
Elevation
(ft)
273 .28
273 .51
273.73
273.93
274.10
( Cl -• ~l~~ ..>io.-fioV')
Velocity
(fVs)
5.64
5.93
6 .19
6.43
6.67 lQ.too \J~t1rn~Tt=
~~~~¥s's.,
lil--'-.
11/25/96
02 :29 :06 PM Haestad Methods, Inc. 37 Brookside Road Waterbury , CT 06708 (203) 755-1666
FlowMaster v5 .13
Page 1 of 1
BEE CREEK CROSS SECTION
Cross Section for Irregular Channel
Project Description
Project File c:\haestad\fmw\csl.fm2
Worksheet BEE CREEK CROSS SECTION
Flow Element Irregular Channel
Method Manning's Formula
Solve For Water Elevation
Section Data
Wtd. Mannings Coefficient 0.020
Channel Slope 0.002000 ft/ft
Water Surface Elevation 273.28 ft
Discharge 3,001 .00 cfs .(-i .~ . o-.-T -----':;...._.---------'-----~~ \.._...; -"-{~ ~ oc:: ve L..c>PfYl~
280.0
278 .
276 .0
g 274.0
6 272.0 :;:; ro > Q)
[iJ 270.0
268.0
266 .0
--------r--------T--------1--------,--------,---------r--------r--------r--------T--------,------,
I I I I I I I I I I I
I I I I I I I I I I I
I I I I I I I I I I
--------~--------+--------+--------~--------~---------~--------~--------·--------+------~--------~ I I I I I I I I I I
I I I I I I I I I I
I I I I I I I I I I --------L------i--------i--------~--------~---------L--------L--------L---------------~--------~ I I I I I I I I I I I
I I I I I I I I I I I
I I I I I I I I I I
I I I I I I I I I --------r--------T ------,--------,-----------------r--------r------T--------T--------,--------, I I I I I I
I I I WI I I I I I
I I I I I I I I I I
--------~--------+--------~~~~~+--tr----~---------~------~--------·--------+--------~--------~ I I I I I I I I I I
I I I I I I I I I I
I I I I I I I I I I I
--------L--------i--------i--------~---------------L--------L--------i--------~--------~ I I I I I I I I I
I I I I I I I I I
I I I I I I I I I I
I I I I I I I I I I I --------r--------T--------1--------,--------,----r--------r--------T--------T--------,--------,
I I I I I I I I I I I
I I I I I I I I I I I
I I I I I I I I I I I
--------~--------+--------+--------~--------~-------~--------~--------·--------+--------~--------~ I I I I I I I I I I I
I I I I I I I I I I I
I I I I I I I I I I I
264.0'--~~~"-~~~_,_~~~ ........ ~~~ ........ ~~~--'-~~~ ....... ~~~--'~~~~.._~~~.._~~~_,_~~~~
11/25/96
02 :30 :30 PM
0 .0 50 .0 100.0 150.0 200 .0 250 .0 300 .0 350 .0 400 .0
Station (ft)
Haestad Methods , Inc. 37 Broo kside Road Wa terb ury , CT 06708 (203) 755-1666
450 .0 500.0 550 .0
FlowMaster v5 .13
Page 1 of 1
BEE CREEK CROSS SECTION -POST DEVEL.
Worksheet for Irregular Channel
Project Description
Project File c :\haestad\fmw\csl.fm2
Worksheet BEE CREEK CROSS SECTION
Flow Element Irregular Channel
Method Manning's Formula
Solve For Water Elevation
Input Data
Channel slope 0.002000 Mt
Elevation range: 265 .00 ft to 280 .00 ft .
Station (ft)
0 .00
Elevation (ft)
278 .00
276 .00
274 .00
272 .00
272 .00
272 .00
270.00
268.00
266 .00
265.00
266.00
268.00
270 .00
272 .00
272 .70
274.00
276 .00
278.00
280.00
Start Station
75 .00
110 .00
152 .00
192.00
215.00
245 .00
260.00
265 .00
270 .00
275 .00
280 .00
295 .00
328 .00
345 .00
392 .00
448 .00
485.00
532.00
0 .00
110.00
2 15.00
245.00
295 .00
328 .00
345 .00
392.00
485 .00
Discharge 3,019 .60 cf s
A("/
Results
Wtd . Mannings oe 1c1ent
Water Surface Elevation
Flow Area
Wetted Perimete r
Top Width
Height
Critical Depth
Critical Slope
Velocity
Velocity Head
Specific Energy
Froude Number
Flow is subcritical.
0.020
273 .29 ft
534.11 ft 2
242 .67 ft
241.26 ft
8.29 ft
272.63 ft
0.005062 ft/ft
5.65 ft/s
0.50 ft
273.78 ft
0.67
End Station
110.00
215 .00
245 .00
295 .00
328 .00
345 .00
392 .00
485 .00
532 .00
Roughness
0.040
0.010
0.040
0.030
0.040
0.010
0.040
0.010
0.040
11/25/96
02 :37:10 PM Haestad Methods , Inc. 37 Brookside Ro ad Waterbury , CT 06708 (203) 755 -1666
FlowMaste r v5 .13
Page 1 of 2
11/25/96
02 :37 :10 PM
BEE CREEK CROSS SECTION -POST DEVEL.
Worksheet for Irregular Channel
Haestad Methods , Inc. 37 Brookside Road Waterbury, CT 06708 (203) 755-1666
FlowMaster v5 .13
Page 2 of 2
BEE CREEK CROSS SECTION -POST DEVEL.
Cross Section for Irregular Channel
Project Description
Project File c:\haestad\fmw\csl.fm2
Worksheet BEE CREEK CROSS SECTION
Flow Element Irregular Channel
Method Manning's Formula
Solve For Water Elevation
Section Data
Wtd . Mannings Coefficient 0.020
Channel Slope 0.002000 tuft
Water Surface Elevation 273.29 ft ~
_D_is_c_h_ar __ g_e _______ 3..._,0_1_9_.s_o __ c_fs__ ~ poe;,7 ~
280 .0
278 .
276 .0
g 274.0
5 272 .0 :;::; ro > Q)
iii 270.0
268 .0
266 .0
--------r--------T--------1--------,--------,---------r--------r--------T--------T--------,------, I I I I I I I I I I I
I I I I I I I I I I I
I I I I I I I I I I
-------~--------+--------+--------~--------~---------~--------~--------+--------+------~--------~ I I I I I I I I I I
I I I I I I I I I I
I I I I I I I I I I --------L------i--------i--------~--------~---------L--------L--------L---------------~--------~ I I I I I I I I I I I
I I I I I I I I I I I
I I I I I I I I I I
I I I I I I I I I --------r--------1 ------1--------,-----------------r--------r------T--------T--------,--------, I I I I I I
I I I Wt I I I I I
I I I I I I I I I I
--------~--------+--------~--------i~tr----~---------~------~--------+--------+--------~--------~ I I I I I I I I I I
I I I I I I I I I I
I I I I I I I I I I I
--------L--------i--------i--------~---------------L--------L--------i--------~--------~ I I I I I I I I I
I I I I I I I I I
I I I I I I I I I I
I I I I I I I I I I I --------r--------T--------1--------,--------,----r--------r--------T--------T--------,--------, I I I I I I I I I I I
I I I I I I I I I I I
I I I I I I I I I I I
--------~--------+--------+--------~--------~-------~--------~--------+--------+--------+--------~ I I I I I I I I I I I
I I I I I I I I I I I
I I I I I I I I I I I 264.0.._ __________________________________________________________________________________________ ___
11/25/96
02 :37:43 PM
0 .0 50 .0 100.0 150.0 200.0 250 .0
Station
300 .0
(ft)
350.0 400 .0
Haestad Methods , Inc . 37 Brookside Road Waterbury , CT 06708 (203) 755-1666
450 .0 500 .0 550.0
FlowMaster v5 .13
Page .1 of 1
DRAINAGE STRUCTURES
COLLEGE STATION LIBRARY -DESPERADO OIL CO., INC.
PIPE FROM DS-1
Ratina Table for Circu lar Channe l
Proje ct Descr iption
Project File c :\haestad \fmw\csl.fm2
Works heet C SL -OU TFALL P IP E
Flow Elem e nt Circ ul a r Ch anne l
Method Ma n ni ng's Formu la
Solve For Di scharge
Constan t Dat a
Mannings Co efficient
Depth
0.013
1.50 ft
18.00 in D iame te r
Inpu t Da ta
Minimum
Channel Slope 0.001000
Rating Table
Maxi mum
0.010000
Chann e l
Slope
(ft/ft )
Discharge
(cfs)
V eloc ity
(ft/s)
0.001000
0.0 01900
l'fl l lJ 0 . 002800
'>t,.()N ~ 0.003700
f.x.J...Duu 0.004500
0.005500
0.006400
0 .0 07300
0 .008200
0.009100
0 .010000
3.32
4.58
5.56
6 .39
7.1 2
7.79
8.40
8.97
9 .51
10.02
10.50
1 .88
2.59
3.15
3.62
4.03
4.41
4.76
5.08
5.38
5.67
5.94
Increm ent
0.00090 0 ft/ft
k w 'Puc-c, ~viG
AGCCG-? ~' .c:>N
' O t <--G::>.
~;:;. \ ~a>-0
~ace 4',~S '/-. l.(~
:::: ~ .o~ c-rs
11/12/96
11:41:40 AM Haes tad Methods , Inc. 37 Bro oks ide Road Wate rbury, CT 06708 (203) 755-1666
FlowMaster v5. 13
Page 1 of 1
Quick TR-55 Ver.5.44
Executed: 10:46:44
S/N:1315430080
11-12-1996
COLLEGE STATION LIBRARY
DESPARADO OIL COMPANY
INLET DS-1 21,230 S.F.
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
Runoff
IC'
Area
acres
PERVIOUS 0.300 0.04
IMPERVIOUS 0.900 0.45
Tc
(min)
Wtd.
IC'
10.00 0.851
RETURN FREQUENCY = 10 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in/hr
0.851 8.630
Total
acres
0.49
Peak Q
(cf s)
3.60
Quick TR-55 Ver.5.44
Executed: 10:46:44
S/N: 1315430080 ·
11-12-1996
COLLEGE STATION LIBRARY
DESPARADO OIL COMPANY
INLET DS-1 21,230 S.F.
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
Runoff
IC'
PERVIOUS 0.300
IMPERVIOUS 0.900
Area
acres
0.04
0 .45
Tc
(min)
Wtd.
IC I
10.00 0.851
RETURN FREQUENCY = 25 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in/hr
0.851 9.860
Total
acres
0.49
Peak Q
(cf s)
4 .11
24 " RCP PIPE FR0!\,.1 DS ·-2
Rating T able for Cir,Julm Cha nn el
Proj ect Descript ion
Project File c:\h ae stad\fm w\csl .fm2
Worksheet CS L .. OUTFALL PIPE
Flow E leme nt
Method
So lve For
Circular Chann e l
Mann ing's Formula
Channe l Depth
Const ant Data
Mannings C oefficient
Cha n ne l Slope
Dia meter
Input Data
Minimum
Disch arge 21.00
Rating Table
0 .0 13
0.01 8780 ft/ft
24 .00 in
Maximum
31.00
Increment
2 .00 cfs
l\l t? = \-2?.z0 CE (.z5
Discharge Depth V elocity fS\-z > ::: 2o .BS G ( :zs (cfs) (in) (ft/s)
21.00 :14.5
23.00 15.4
25 .00 16.3
27.00 17.3
29.00 18.4
31.00 19.7
Vcia:::.tn ·cs ~
~ f;-.NO o v ~
10.60 ;>-~lo 10.81
10.98
11 .12 ><Q...zs 11.21
11 .25
Lo)-..) "?l O'G.r~ I... c>-:J
SwucTun-c) .
01/02/97
03:21:31 PM Haestad Methods, Inc . 37 Brookside Road Wate rb ury, CT 06 708 (203) 755-1666
:: -Z?,6(
=a;. CC::,
FlowMaste r v5 .13
Page 1 of 1
Quick TR-55 Ver.5.44
Executed: 11:35:12
S/N:1315430080
11-12-1996
COLLEGE STATION LIBRARY
POST DEVELOPMENT CONDITIONS
INLET DS-2 TOTAL DRAINAGE AREA
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
Runoff
IC'
PERVIOUS 0.300
IMPERVIOUS 0.900
Area
acres
0.48
2.19
Tc
(min)
Wtd.
IC'
10.00 0.792
RETURN FREQUENCY = 10 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in/hr
0.792 8.630
Total
acres
2.67
Peak Q
(cfs)
18.25
Quick TR-55 Ver.5.44
Executed: 11:35:12
S/N:l315430080
11-12-1996
COLLEGE STATION LIBRARY
POST DEVELOPMENT CONDITIONS
INLET DS-2 TOTAL DRAINAGE AREA
* * * * * * SUMMARY OF RATIONAL METHOD PEAK DISCHARGES * * * * * *
Q = adj * C * I * A
Where: Q=cfs, C=Weighted Runoff Coefficient, I=in/hour, A=acres
adj = 'C' adjustment factor for each return frequency
Subarea
Descr.
Runoff
I c I
Area
acres
PERVIOUS 0.300 0.48
IMPERVIOUS 0.900 2.19
Tc
(min)
Wtd.
IC I
10.00 0.792
RETURN FREQUENCY = 25 years
'C' adjustment, k = 1
Adj. 'C' = Wtd.'C' x 1
========================= ========
Adj. I
'C' in/hr
0.792 9.860
Total
acres
2.67
Peak Q
(cfs)
20.85
Table
Rating Table for Circular Channel
Project Description
Project File c:\haestad\fmw\csl.fm2
Worksheet CSL-1
Flow Element Circular Channel
Method Manning's Formula
Solve For Discharge
Constant Data
Mannings Coefficient
Depth
Diameter
Input Data
0.014
1.50 ft
18 .00 in
Minimum
Channel ~lope 0.000100
Rating Table
Channel
~aximum
0.005000
Slope Discharge Velocity
(ft/ft) (cfs) (ft/s)
0.000100 0.98 0.55
0.001100 3.23 1.83
0.002100 4.47 2.53
0.003100~ 5.4* 3.07
0.004100 6.25
Increment
0.001000 ftift
~~. 'b~~-\-
~ e,
~~ :::'.
~L~ ~
3.53 l.o
0.005100 6.97 3.94 "'"' /
'2;, ~ ~b·' 1Zo.P ~'f'.6 .f.. vn. ?.~lB
~~&S : ~Wl ~c=s 9c.
11/25/96
03 :58 :43 PM Haestad Methods, Inc. 37 Brookside Road Waterbury , CT 06708 (203) 755-1666
FlowMaster v5 .13
Page 1 of 1
DESPERADO OIL CO. DRAINAGE PLAN
COLLEGE STATION LIBRARY -DESPERADO OIL CO., INC.
1900 PERY
1480 IMPERV
s T E
I .1
I . . I ~i
"'I
~-~I
~I
io
,8.30 SF
1530 PERY
• 12300 IMPERV
G
21 ,2.30
R
1770 PERV
19,460 IMPERV
A D
,, ...
,
11.'ff
N G
/ ,.,..,,
--····~-3690 PERY ~~---
37,980 IMPERV --:::::~:::::
p L A N
100 y
DEVELOPMENT PERMIT
PERMIT NO. 437
DESPERADO OIL COMP ANY
FOR AREAS INSIDE THE SPECIAL FLOOD HAZARD AREA
RE: CHAPTER 13 OF THE COLLEGE STATION CITY CODE
SITE LEGAL DESCRIPTION:
Lot Al, Southwood Valley, Section 30
SITE ADDRESS:
700 FM 2818
College Station, Texas 77845
OWNER: / -r.; ~ ~iLJJ£e.Aoo MArJP6JE/YJ6Air c:.:JR:otJ;=: _l.IVC .
3998 Texas Avenue South
College Station, Texas 77845
DRAINAGE BASIN:
Bee Creek Tributary "B"
TYPE OF DEVELOPMENT:
This permit is valid for the construction of the proposed convenience store as shown
on the approved plans. This development will be responsible for the construction of
the common storm water outlet structure and the access drive on FM 2818 that is to
be shown or included with the College Station Library construction documents.
Contractor shall prevent silt and debris from leaving the site in accordance with the City of
College Station Drainage Policy and Design Criteria. Owner and/or contractor shall be
responsible for any damage to existing city streets or infrastructure due to heavy
machinery and/or equipment.
In accordance with Chapter 13 of the Code of Ordinances of the City of College Station,
measures shall be taken to insure that debris from construction, erosion, and sedimentation
shall not be deposited in city streets, or existing drainage facilities.
I hereby grant this permit for development of an area inside the special flood hazard area.
All development shall be in accordance with the plans and specifications submitted to and
approved by the City Engineer in the development permit application for the above named
pr ~e and ll of the codes and ordinances of the City of College Station that apply.
/2.-Z-7l.
Date 1~ -:r-Y'~
Date
Contractor Date
Figure XII
Development Permit
City of College Station, Texas
Architect/ ~ /J ~' L .AMM Ot¥
Address f ?oo ~ <-"'2~~l"'=1 l'.5-
T el ephone No : --'&""""({__._ _ __,.~'----_,_/_,_<f_,~f--+'J-----
Address :
~----------~ Telephone No : _________ _
Date Application Filed : l I/ ':J_ (qr,e
-1 --+-+[~'F------
Application is hereby made for the following development specific waterway alterations :
/\loN &
0 Application Fee
0 Signed Certifications
0 Drainage and erosion control plan , with supporting Drainage Report two (2) copies each .
kl_ Site and Construction Plans , with supporting Drainage Report two (2) copies each .
0 Other :
~----------------------------
ACK N OWLEDGMENTS :
I , ~ .1MJj);(/)/"', d gn engi er/owner, hereby acknowledge or affirm that
Th ==conclusions contained in the above plans and supporting documents comply
with the current r equirements of the City of College Station, Texas City Code, Chapter 13 and its
asso ciated Drainage Policy and Desi g n Standards .
As a condition of approval of this permit application , I agree to construct the improvements
proposed in this appl" . ation according to these documents and the requirements of Chapter 13 of
the,M Statio ity Code .
i~"-
Prop ert 7 0wner(s) Contractor
Figure XII Continued
r proposed alt e rations within desi g nated flood hazard areas .)
A.
Engineer
B. I,
~--------'c,---r----~
floor , including any basemen
at or above the base flood v ion established in the latest Fede
Flood Hazard Study and aps , as i:ided.
Eng ineer Date
C . I , /jjtet.-(-A-E L t/fSTE:f? , certify that the alterations or development covered by
this permit shall not diminish the flood-carrying capacity of the waterway adjoining or crossing
this permitted site and that such alterations or development are consistent with requirements of
the City of Co ge Station City Code, Chapter 13 concerning encroachments of flood ways and of
flo away frin
P2.
Date
-4-"-1.--"""4-µ:_"""-""~+J..=:lo<:-'--"=::...._-____J do certify that the proposed alterations do not raise the level
above elevation established in the latest Federal Insurance Administration
D a te
Conditions or comments as11art of approval: 'No SmliM WA-tfKL.-
Q k(&t-!.."ft 1
D t?J f k&f-1 Nt'i1{)
In accordance with Chapter 13 of the Code of Ordinances of the City of College Station,
measures shall be taken to insure that debris from construction, erosion, and sedimentation shall
not be deposited in city streets, or existing drainage facilities .
I he r eby grant this permit for development. All developme nt shall be in accordance with the plans
and specifications submitted to and approved by the City Engineer for the above named project.
All of the applicable codes and ordinances of the City of College Station shall apply .
ACCOUNT NO. ________________ _ 382804
--A-------+-,;~--=-->L---' 19Gt \e
Paid by _ Check--¥---Cash __ _