HomeMy WebLinkAbout23 Exxon Convinence StoreDrainage Report
FOR
EXXON CONVENIENCE STORE
LOT 1, BLOCK TWO
EDELWEISS BUSINESS CENTER
VICINITY MAP
JUNE 1997 I APPROVED F
Prepared By:
McClure Engineering, Inc. ~ 1 7 1997
1722 Broadmoor Drive, Suite 210 I /y_ ~~
Bryan, Texas 77802 p t •
< 409) 77q -67oo CONS CTI
Drajnage Report
FOR
EXXON CONVENIENCE STORE
LOT 1, BLOCK TWO
EDELWEISS BUSINESS CENTER
VICINITY MAP
JUNE 1997
Prepared By:
McClure Engineering, Inc.
1722 Broadmoor Drive, Suite 210
Bryan, Texas 77802
( 40~) 776-6700
CERTIFICATION
I, Michael R. McClure, Registered Professional Engineer No. 32740, State of Texas,
certify that this report for the drainage design of the EXXON CONVENIENCE STORE at
Lot I , Block Two of the EDELWEISS BUSNESS CENTER, was prepared by me in
accordance with the provisions of the City of College Station Drainage Policy and Design
Standards for the owners thereof
DRAINAGE REPOR T
EXXON CONVENIENCE STORE
9ui4s:-tk, 11h/·n
Michael R. McClure, P .E. #32740
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TABLE OF CONTENTS
LOT 1, BLOCK 2, EDELWEISS BUSNESS CENTER
EXXON CONVENIENCE STORE
INTRODUCTION
GENERAL LOCATION AND DESCRIPTION
PRIMARY DRAINAGE BASIN DESCRIPTION
DRAINAGE FACILITY DESIGN
DRAINAGE DESIGN CRITERIA
CONCLUSION
EXHIBITS
FEMA FLOOD INSURANCE RATE MAP EXCERPT
DRAINAGE AREA MAP -EXISTING CONDIDONS
DRAINAGE AREA MAP -PROPOSED CONDITIONS
RATIONAL FORMULAS DRAINAGE AREA CALCULATIONS
PROPOSED DETENTION POND ROUTING
ROUTING HYDROGRAPHS
STAGE-STORAGE CURVE, STAGE-DISCHARGE CURVE
DRAINAGE REPORT
EXXON CONVENIENCE STORE
1
1
1
2
2
3
"A"
"B-1"
"B-2"
"C-1"
"D-1"
"D-2"
"D-3"
11
DRAINAGE REPORT
LOT 1, BLOCK 2, EDELWEISS BUSNESS CENTER
EXXON CONVENIENCE STORE
INTRODUCTION:
This storm drainage report is intended to cover the necessary drainage infrastructure for the
proposed development site improvements . The parameters used for design and the existing
conditions of the on-site area are incorporated to show how the final drainage design will accomplish
the desired drainage objectives per the City of College Station Drainage Policy and Design Standards
(DPDS.)
GENERAL LOCATION AND DESCRIPTION:
This Exxon Convenience Store is located in the southern portion of College Station. The site
is a commercial lot located at the intersection of Wellborn Road and Rock Prairie Road (currently
under construction). The lot is platted as Lot 1, Block Two of the Edelweiss Business Center.
The site is undeveloped and is gently rolling with an average of 1 % slopes .
PRIMARY DRAINAGE BASIN DESCRIPTION:
The site drains to the western comer of the property. All storm water from the site flows into
the Bee Creek Tributary "B".
No portion of the site is within the 100-year flood plain per the Federal Emergency
Management Agency Flood Insurance Rate Maps for Braz.as County, Texas and Incorporated Areas,
DRAINAGE REPORT PAGEi
EXXON CONVENIENCE STORE
Map Number 48041C0182 C, effective July 2, 1992 (see Exhibit 11 A").
DRAINAGE FACILITY DESIGN:
The site will be served by a detention pond located along the southwest property line. Exhibit
11B-211 shows the proposed drainage areas for the pond. Exhibit 11B-l 11 shows the existing conditions
drainage area. The study point for this analysis is the inlet of the Rock Prairie Road culvert . The
outlet device for the pond is a 15 11 orifice opening. The driveway entrance from Wellborn Road is
located at the crest of the hill and does not require a culvert.
DRAINAGE DESIGN CRITERIA:
All drainage design is in accordance with the City DPDS . The design rainstorm is the 10-year
event. Flow calculations for all drainage areas are based on the Rational Method. Pipe sizing is in
accordance with Manning's Equation with an 11 n 11 of .014 per the DPDS .
The storage volume required for the detention facility is based on a triangular hydrograph
(base= 3* Tc) and peak flows computed using the rational method . The required volume consists
of the difference in volume of the Pre-development and Post-development hydrographs for the 10-
year design storm.
The proposed detention pond routings shown in Exhibit 11 0-1 11 and 11 0-2 11 demonstrate how
the pond will function. Exlubit 110-3 11 shows a stage storage· and stage discharge curve for the pond.
The peak discharge for the Post-development condition does not exceed the Pre-development
condition for the 5, 10, 25, 50, and 100 year storm events.
The following summary table shows the peak flow for the Pre-development events and the
DRAINAGE REPORT PAGE2
EXXON CONVENIENCE STORE
peak flows for the Post-development event at the study point.
~"'--~ ' ~ -,·' ~"" ,: .. ·. •, . ' ,, ~, ~~·.:·-,-; .... _;.:'-:;· ~~-"'--'~"' :;•;.4• -~, -...... ¥" ......... J~ .-,-~· ·~~ .. ~ ' .... ~;,-·--~
~ -...:U;I!S )rq_1}1! ·' t.},11'."._t 1'1,:5_~.~!f0.,J;··H{ .. IT~}~.:\!1_u1: {. ,~.1·:.;:;~. · _:· . :",:·~
""""•., .... ' ,"':! -<. ¥. '•'• ... A f • •--.. ~' -~''•' .-.. _... < ,._,_ • ' "• , __ ,. ... • ._,_...._ .. :;..>._, <-·--~-<., '1-'Jiil;..--..<-•"'-, v~_.:;;_ '"•' I;. ,_ .. i;,-,_, ,.. • \ •f •<<.-.<>'•"' ~ '"'' d<-. ,./.;' <.'<:.-'"~-.. , .]•(_~;>.,
Pre-Development }lost-Development Water Service Elev .
Qs= 11 cfs 11 cfs 331.5
Q10= 12 cfs 12 cfs 331.6
Qzs= 14 cfs 14 cfs 331 .8
Qso= 16 cfs 15 cfs 331.9
Qioo= 18 cfs 16 cfs 332 .1
Top of Berm= 332 .00
CONCLUSION:
The Post-development peak discharge does not exceed the Pre-development peak discharge .
In all cases, including the 100-year event, storm water is released into public rights-of-ways and
conveyed to the natural outfall . The drainage design for this site meets the requirements as stated in
the City of College Station Drainage Policy and Design Standards .
DRAINAGE REPORT PAGE 3
EXXON CONVENIENCE STORE
.· .
. ·~·· .. :·. ~
....
. I
.. . · ..
........
I .
. · .
~---------___;--~
PRO-£CT Sl1E .
I
~J
~-
Excerpt From Flood Insurance
Rate Map No. 48041COl82C
Effective Dates July 2, 1992
. Exhibit •A"
~ 0 ~ Q: LU ..J < ~ 0.. :g; ~ I&..
LU 9 0
(!) Q: .... ~ ~ z < LU z 5~ < ..J ~~ LU ~ ~ z ·~ 0 Q: (!) ~ ti) 0 LU z g ~~ w 0 >w
0 Q: Ii I-0 ..J
NO . AC. 0 .4 0 .55 0 .95 ft.
Ex 2 .10 1.60 0 .00 0 .50 1.12 1.0
Pr1 1.20 0 .11 0.00 1.09 1.08 1.0
Pr2 0 .90 0.36 0 .00 0.54 0 .66 1.0
EXHIBIT C-1
Rationa l Formula Dra i nage Area Calculations
Rock Pra irie Road Exxon
~ 3: 3: ..J
I&.. 0 0
0 ..J ..J z I&.. I&.. ~ 5 Q: :c Q:
LU I-LU (j ~ ~ Q: ..J ~ (!) ~ ..J 0 LU ..J :::I z ::> ..J ..J ~ w ~~ ~ ca ~ a It)
(!) ~ (!) ~ 0 ~ ~ a
ft. ft. ft . ft/• min min In/Hr cfs In/Hr cfs
1.0 430 .0 3.5 1.8 4 .0 5 .0 8.22 9.2 9.9 11.0
1.0 350 .0 3.5 2 .0 2 .9 5 .0 8.22 8.9 9 .9 10 .6
1.0 430 .0 3.5 1.8 4 .0 5.0 8.22 5.4 9.9 6 .5
c It) c .... It) a ~ a ~
In/Hr cf• In/Hr cfs
11.0 12 .2 12 .5 14 .0
11.0 11.9 12 .5 13 .5
11.0 7.2 12 .5 8.2
~
In /Hr
14 .1
14 .1
14 .1
~ g g .... a ~ a
cfs In/Hr cfs
15 .7 15 .8 17 .6
15 .2 15 .8 17.0
9 .3 15.8 10.4
4'2.8/97
971 O-dra .x1s
Exhibit C-1
D.A. I D.A. I 'It .c Q Q. w I!! z ~ iii :ii: i. ... 0 ... ::c a. 0 On 10.6 Tc 5.0 inc 1.0 Time cfs cfs 0.0 0.0 0.0 1.0 2.1 2.1 2.0 4.3 4.3 3.0 6.4 6.4 4.0 8.5 8.5 5.0 10.6 10.6 6.0 9.6 9.6 7.0 8.5 8.5 8.0 7.4 7.4 9.0 6.4 6.4 10.0 5.3 5.3 11.0 4.3 4.3 12.0 3.2 3.2 13.0 2.1 2.1 14.0 1.1 1.1 15.0 0.0 0.0 16.0 0.0 0.0 17.0 0.0 0.0 18.0 0.0 0.0 19.0 0.0 0.0 20.0 0.0 0.0 21.0 0.0 0.0 22.0 0.0 0.0 23.0 0.0 0.0 24.0 0.0 0.0 25.0 0.0 0.0 26.0 0.0 0.0 27.0 0.0 0.0 28.0 0.0 0.0 29.0 0.0 0.0 30.0 0.0 0.0 PEAK FLOWS 11 11 0.00 indicates inital condition EXHJBJI "D-1" PROPOSED DETENTION POND ROUTING Rock Prairie Road Exxon Pond Routing IVENT= 5 D.A.I c a + c ~ c ... q 0 + ... ;:; c ~ l: ... ,, .. + + c > ~ ~ Cl) c 0 .!! .s N CJ a. w a. 6.5 5.0 cf s cfs cfs cfs ft cfs 2.13 0.00 0.00 0.00 330.0 0.0 6.38 1.31 2.13 0.41 330.1 1.3 10.64 4.75 7.70 1.47 330.3 2.6 14.90 9.49 15.39 2.95 330.7 3.9 19.15 15.72 24.39 4.34 331.0 5.2 20.22 25.18 34.87 4.85 331.2 6.5 18.09 34.67 45.39 5.36 331.3 5.8 15.96 41.32 52.76 5.72 331.4 5.2 13.83 45.40 57.28 5.94 331.4 4.5 11.70 47.15 59.23 6.04 331.5 3.9 9.58 46.82 58.86 6.02 331.5 3.2 7.45 44.60 56.40 5.90 331.4 2.6 5.32 40.68 52.05 5.69 331.4 1.9 3.19 35.22 46.00 5.39 331.3 1.3 1.06 28.37 38.41 5.02 331.2 0.6 0.00 20.27 29.43 4.58 331.1 0.0 0.00 12.51 20.27 3.88 330.9 0.0 0.00 7.72 12.51 2.39 330.6 0.0 0.00 4.76 7.72 1.48 330.4 0.0 0.00 2.94 4.76 0.91 330.2 0.0 0.00 1.81 2.94 0.56 330.1 0.0 0.00 1.12 1.81 0.35 330.1 Q.0 0.00 0.69 1.12 0.21 330.l 0.0 0.00 0.43 0.69 0.13 330.0 0.0 0.00 0.26 0.43 0.08 330.0 0.0 0.00 0.16 0.26 0.05 330.0 0.0 0.00 0.10 0.16 0.03 330.0 0.0 0.00 0.06 0.10 0.02 330.0 0.0 0.00 0.04 0.06 0.01 330.0 0.0 0.00 0.02 0.04 0.01 330.0 0.0 0.00 0.01 0.02 0.00 330.0 0.0 6 331.5 6 Q w (/) ..J 0 :! ~ f2 ft: cfs 0.00 1.70 4.07 6.83 9.52 11.33 11.19 10.90 10.48 9.92 9.26 8.49 7.63 6.69 5.67 4.58 3.88 2.39 1.48 0.91 0.56 0.35 0.21 0.13 0.08 0.05 0.03 0.02 0.01 0.01 0.00 11 >.A. I C) ..J z :!~ lo( E1':i w 11.0 5.0 cfs cfs 0.0 2.2 4.4 6.6 8.8 11.0 9.9 8.8 7.7 6.6 5.5 4.4 3.3 2.2 1.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 11 9710-dra.xls Exhibit 0-1 0.00 2.20 4.40 6.59 8.79 10.99 9.89 8.79 7.69 6.59 5.49 4.40 3.30 2.20 1.10 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 11
O.A.# D.A. # • ~ Q ILi ! z ~ iii ::::E j. ... 8 .. :c A. IQD 11.9 Tc 5.0 inc 1.0 Time cfs cfs 0.0 0.0 0.0 1.0 2.4 2.4 2.0 4.7 4.7 3.0 7.1 7.1 4.0 9.5 9.5 5.0 11.9 11.9 6.0 10.7 10.7 7.0 9.5 9.5 8.0 8.3 8.3 9.0 7.1 7.1 10.0 5.9 5.9 11.0 4.7 4.7 12.0 3.6 3.6 13.0 2.4 2.4 14.0 1.2 1.2 15.0 0.0 0.0 16.0 0.0 0.0 17.0 0.0 0.0 18.0 0.0 0.0 19.0 0.0 0.0 20.0 0.0 0.0 21.0 0.0 0.0 22.0 0.0 0.0 23.0 0.0 0.0 24.0 0.0 0.0 25.0 0.0 0.0 26.0 0.0 0.0 27.0 0.0 0.0 28.0 0.0 0.0 29.0 0.0 0.0 30.0 0.0 0.0 PEAK FLOWS 12 12 0.00 indicates inital condition EXHIBIT "D-1" PROPOSED DETENTION POND ROUTING Rock Prairie Road Exxon l>ond Routina l:VENT= 10 D.A. # c a ~ c c ... q .2 ~ ... ... "a J ~ ~ + + ~~ ~ ~ ~ lj .s A. 7.2 5.0 cfs cf s cfs cfs ft cf s 2.37 0.00 0.00 0.00 330.0 0.0 7.12 1.46 2.37 0.45 330.1 1.4 11.86 5.29 8.58 1.64 330.4 2.9 16.60 10.58 17.15 3.29 330.8 4.3 21.35 18.24 27.19 4.47 331. l 5.8 22.53 29.44 39.59 5.08 331.2 7.2 20.16 40.61 51.97 5.68 331.4 6.5 17.79 48.54 60.77 6.11 331.5 5.8 15.42 53.57 66.33 6.38 331.6 5. 1 13.05 55.96 68.99 6.51 331.6 4.3 10.67 55.98 69.01 6.51 331.6 3.6 8.30 53.86 66.65 6.40 331.6 2.9 5.93 49.80 62.16 6.18 331.5 2.2 3.56 44.00 55.73 5.87 331.4 1.4 1.19 36.62 47.56 5.47 331.3 0.7 0.00 27.83 37.81 4.99 331.2 0.0 0.00 18.82 27.83 4.50 331. 1 0.0 0.00 11.61 18.82 3.60 330.9 0.0 0.00 7.16 11.61 2.22 330.5 0.0 0.00 4.42 7.16 1.37 330.3 0.0 0.00 2.73 4.42 0.85 330.2 0.0 0.00 1.68 2.73 0.52 330.1 0.0 0.00 1.04 1.68 0.32 330.l 0.0 0.00 0.64 1.04 0.20 330.0 0.0 0.00 0.40 0.64 0.12 330.0 0.0 0.00 0.24 0.40 0.08 330.0 0.0 0.00 0.15 0.24 0.05 330.0 0.0 0.00 0.09 0.15 0.03 330.0 0.0 0.00 0.06 0.09 0.02 330.0 0.0 0.00 0.04 0.06 0.01 330.0 0.0 0.00 0.02 0.04 0.01 330.0 0.0 7 331.6 7 Q ILi Cl) -' 0 :! ~ ef cf s 0.00 1.90 4.53 7.62 10.25 12.30 12.18 11.89 11.44 10.84 10.12 9.29 8.35 7.31 6.19 4.99 4.50 3.60 2.22 1.37 0.85 0.52 0.32 0.20 0.12 0.08 0.05 0.03 0.02 0.01 0.01 12 >.A.# C> -' z 4: J:: ... !!.! ..: e~ ILi 12.2 5.0 cfs cfs 0.0 2.4 4.9 7.3 9.8 12.2 11.0 9.8 8.6 7.3 6.1 4.9 3.7 2.4 1.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 12 9710-dra.xls Exhibit 0-1 0.00 2.45 4.90 7.35 9.80 12.25 11.02 9.80 8.57 7.35 6.12 4.90 3.67 2.45 1.22 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 12
D.A. I D_A. I :a: a Q w i z iii ... :E ~ .... 8 ... a. lao 13.5 Tc 5.0 inc 1.0 Time cfs cfs 0.0 0.0 0.0 1 .0 2.7 2.7 2.0 5.4 5.4 3.0 8. 1 8. 1 4.0 10.8 10.8 5.0 13.5 13.5 6.0 12.2 12.2 7.0 10.8 10.8 8.0 9.5 9.5 9.0 8.1 8.1 10.0 6.8 6.8 11.0 5.4 5.4 12.0 4.1 4.1 13.0 2.7 2.7 14.0 1.4 1.4 15.0 0.0 0.0 16.0 0.0 0.0 17.0 0.0 0.0 18.0 0.0 0.0 19.0 0.0 0.0 20.0 0.0 0.0 21.0 0.0 0.0 22.0 0.0 0.0 23.0 0.0 0.0 24.0 0.0 0.0 25.0 0.0 0.0 26.0 0.0 0.0 27.0 0.0 0.0 28.0 0.0 0.0 29.0 0.0 0.0 30.0 0.0 0.0 PEAK FLOWS 14 14 0.00 indicates inital condition EXHIBIT "D-1" PROPOSED DETENTION POND ROUTING Rock Prairie Road Exxon Pond Routina I VENT= 25 ).A. I c a + c ~ c .... q 0 + .... :::: c ~ + .... -g E + c + ~ 8 en ~ 0-~ N a. w a. 8.2 5.0 cf s cfs cf s cfs ft cfs 2.70 0.00 0.00 0.00 330.0 0.0 8.10 1 .67 2.70 0.52 330.1 1.6 13.51 6.03 9.77 1 .87 330.4 3.3 18.91 12.05 19.54 3.74 330.9 4.9 24.31 21.65 30.96 4.66 331. 1 6.6 25.66 35.18 45.96 5.39 331 .3 8.2 22.96 48.62 60.85 6.12 331.5 7.4 20.26 58.30 71.58 6.64 331.6 6.6 17.56 64.60 78.56 6.98 331.7 5.8 14.86 67.85 82.16 7.16 331.8 4.9 12.16 68.34 82.71 7.18 331.8 4.1 9.45 66.35 80.50 7.07 331.7 3.3 6.75 62.12 75.81 6.85 331.7 2.5 4.05 55.86 68.87 6.51 331.6 1.6 1.35 47.77 59.91 6.07 331.5 0.8 0.00 38.03 49.12 5.54 331.3 0.0 0.00 28.03 38.03 5.00 331.2 0.0 0.00 19.00 28.03 4.51 331.1 0.0 0.00 11.72 19.00 3.64 330.9 0.0 0.00 7.23 11.72 2.25 330.5 0.0 0.00 4.46 7.23 1.39 330.3 0.0 0.00 2.75 4.46 0.85 330.2 0.0 0.00 1.70 2.75 0.53 330.1 0.0 0.00 1.05 1.70 0.33 330.1 0.0 0.00 0.65 1.05 0.20 330.0 0.0 0.00 0.40 0.65 0.12 330.0 0.0 0.00 0.25 0.40 0.08 330.0 0.0 0.00 0.15 0.25 0.05 330.0 0.0 0.00 0.09 0.15 0.03 330.0 0.0 0.00 0.06 0.09 0.02 330.0 0.0 0.00 0.04 0.06 0.01 330.0 0.0 7 331.8 8 Q w en ...10 ~~ ~~ cfs 0.00 2.16 5.16 8.68 11.24 13.61 13.52 13.22 12.74 12.09 11.29 10.36 9.31 8.15 6.89 5.54 5.00 4.51 3.64 2.25 1.39 0.85 0.53 0.33 0.20 0.12 0.08 0.05 0.03 0.02 O.Ql 14 >.A. I lo( w 14.0 5.0 cfs 0.0 2.8 5.6 8.4 11 .2 14.0 12.6 11.2 9.8 8.4 7.0 5.6 4.2 2.8 1.4 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 14 9710-dra.xls Exhibit D-1 C> _. z ct I= I-!!? ~~ cfs 0.00 2.79 5.58 8.37 11. 16 13.95 12.56 11.16 .9.77 8.37 6.98 5.58 4.19 2.79 1.40 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 14
D.A. I D.A. I -a Q ILi I! ~ ~ al :::E i. -~ 8 :c Clo 15.2 Tc 5;0 inc 1.0 Time cf s cf s 0.0 0.0 0.0 1.0 3.0 3.0 2.0 6.1 6.1 3.0 9.1 9.1 4.0 12.2 12.2 5.0 15.2 15.2 6.0 13.7 13.7 7.0 12.2 12.2 8.0 10.7 10.7 9.0 9.1 9.1 10.0 7.6 7.6 11.0 6.1 6.1 12.0 4.6 4.6 13.0 3.0 3.0 14.0 1.5 1.5 15.0 0.0 0.0 16.0 0.0 0.0 17.0 0.0 0.0 18.0 0.0 0.0 19.0 0.0 0.0 20.0 0.0 0.0 21.0 0.0 0.0 22.0 0.0 0.0 23.0 0.0 0.0 24.0 0.0 0.0 25.0 0.0 0.0 26.0 0.0 0.0 27.0 0.0 0.0 28.0 0.0 0.0 29.0 0.0 0.0 30.0 0.0 0.0 PEAK FLOWS 15 15 0.00 indicates inital condition EXHIBIT "D-1" PROPOSED DETENTION POND ROUTING Rock Prairie Road Exxon Pond Routing l:VENT= 50 l>.A. I c a + c !? c -~ .2 + --1ii c + l~ + c + ~ ~ a ~ ..5 0.. 9.3 5.0 cf s cfs cfs cf s ft cf s 3.05 0.00 0.00 0.00 330.0 0.0 9.14 1.88 3.05 0.58 330.1 1.9 15.23 6.80 11.01 2.11 330.5 3.7 21.32 13.59 22.02 4.22 331.0 5.6 27.41 25.20 34.90 4.85 331.2 7.4 28.93 41.18 52.61 5.71 331.4 9.3 25.88 56.98 70.11 6.57 331.6 8.3 22.84 68.48 82.86 7.19 331.8 7.4 19.79 76.11 91.32 7.60 331.9 6.5 16.75 80.25 95.91 7.83 331.9 5.6 13.70 81.24 97.00 7.88 331.9 4.6 10.66 79.39 94.95 7.78 331.9 3.7 7.61 74.96 90.05 7.54 331.9 2.8 4.57 68.23 82.58 7.18 331.8 1.9 1.52 59.40 72.79 6.70 331.6 0.9 0.00 48.68 60.92 6.12 331.5 0.0 0.00 37.64 48.68 5.52 331.3 0.0 0.00 27.67 37.64 4.98 331.2 0.0 0.00 18.68 27.67 4.50 331.1 0.0 0.00 11.53 18.68 3.58 330.8 0.0 0.00 7.11 11.53 2.21 330.5 0.0 0.00 4.39 7.11 1.36 330.3 0.0 0.00 2.71 4.39 0.84 330.2 0.0 0.00 1.67 2.71 0.52 330.1 0.0 0.00 1.03 1.67 0.32 330.1 0.0 0.00 0.64 1.03 0.20 330.0 0.0 0.00 0.39 0.64 0.12 330.0 0.0 0.00 0.24 0.39 0.08 330.0 0.0 0.00 0.15 0.24 0.05 330.0 0.0 0.00 0.09 0.15 0.03 330.0 0.0 0.00 0.06 0.09 0.02 330.0 0.0 8 331.9 9 Q ILi 0 ..I 0 :!~ ell: cfs 0.00 2.44 5.82 9.78 12.26 14.98 14.91 14.61 14.09 13.39 12.51 11.49 10.32 9.03 7.63 6.12 5.52 4.98 4.50 3.58 2.21 1.36 0.84 0.52 0.32 0.20 0.12 0.08 0.05 0.03 0.02 15 >.A. I 0 ..I z :! ~ ~ e r:i 15.7 5.0 cfs cfs 0.0 3.1 6.3 9.4 12.6 15.7 14.2 12.6 11.0 9.4 7.9 6.3 4.7 3.1 1.6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 16 9710-dra.xls Exhibit 0-1 0.00 3.15 6.29 9.44 12.58 15.73 14.15 12.58 11.01 9.44 7.86 6.29 4.72 3.15 1.57 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 16
D.A. I D.A. I it s: 0 c. w I!! z 8' iii ... :E i. ... 0 ... ::t: a. 0 Qp 17.0 Tc 5.0 inc 1.0 Time cf s cfs 0.0 0.0 0.0 1.0 3.4 3.4 2.0 6.8 6.8 3.0 10.2 10.2 4.0 13.6 13.6 5.0 17.0 17.0 6.0 15.3 15.3 7.0 13.6 13.6 8.0 11.9 11.9 9.0 10.2 10.2 10.0 8.5 8.5 11.0 6.8 6.8 12.0 5.1 5.1 13.0 3.4 3.4 14.0 1.7 1.7 15.0 0.0 0.0 16.0 0.0 0.0 17.0 0.0 0.0 18.0 0.0 0.0 19.0 0.0 0.0 20.0 0.0 0.0 21.0 0.0 0.0 22.0 0.0 0.0 23.0 0.0 0.0 24.0 0.0 0.0 25.0 0.0 0.0 26.0 0.0 0.0 27.0 0.0 0.0 28.0 0.0 0.0 29.0 0.0 0.0 30.0 0.0 0.0 PEAK FLOWS 17 17 0.00 indicates inital condition EXHIBIT "D-1" PROPOSED DETENTION POND ROUTING Rock Prairie Road Exxon ~ond Routing I VENT= 100 ).A. I c a + c ~ c ... i .2 + ... ... 'C ~ c + + + c a C II ~ ~ if jij .,!; a. 10.4 5.0 cfs cfs cfs cf s ft cfs 3.41 0.00 0.00 0.00 330.0 0.0 10.23 2.10 3.41 0.65 330.2 2.1 17.04 7.61 12.33 2.36 330.6 4.2 23.86 15.95 24.65 4.35 331.0 6.2 30.68 29.64 39.81 5.09 331.2 8.3 32.38 48.14 60.32 6.09 331.5 10.4 28.97 66.37 80.52 7.08 331.7 9.3 25.57 79.75 95.34 7.80 331.9 8.3 22.16 88.94 105.31 8.19 332.0 7.3 18.75 94.43 111.10 8.33 332.1 6.2 15.34 96.42 113.18 8.38 332.1 5.i 11.93 95.06 111.76 8.35 332.1 4.2 8.52 90.54 106.99 8.23 332.1 3.1 5.11 83.10 99.06 7.98 332.0 2.1 1.70 73.31 88.21 7.45 331.8 1.0 0.00 61.40 75.01 6.81 331.7 0.0 0.00 49.12 61.40 6.14 331.5 0.0 0.00 38.03 49.12 5.54 331.3 0.0 0.00 28.03 38.03 5.00 331.2 0.0 0.00 19.00 28.03 4.51 331.1 0.0 0.00 11.72 19.00 3.64 330.9 0.0 0.00 7.23 11.72 2.24 330.5 0.0 0.00 4.46 7.23 1.39 330.3 0.0 0.00 2.75 4.46 0.85 330.2 0.0 0.00 1.70 2.75 0.53 330.1 0.0 0.00 1.05 1.70 0.33 330.1 0.0 0.00 0.65 1.05 0.20 330.0 0.0 0.00 0.40 0.65 0.12 330.0 0.0 0.00 0.25 0.40 0.08 330.0 0.0 0.00 0.15 0.25 0.05 330.0 0.0 0.00 0.09 0.15 0.03 330.0 0.0 8 332.1 10 0 w Cl) _, 0 ~~ e~ cfs 0.00 2.73 6.51 10.57 13.39 16.47 16.41 16.10 15.45 14.56 13.57 12.50 11.34 10.06 8.49 6.81 6.14 5.54 5.00 4.51 3.64 2.24 1.39 0.85 0.53 0.33 0.20 0.12 0.08 0.05 0.03 16 l).A. I C> _, z cs: J= ... !!? >< e r;j w 17.6 5.0 cfs cfs 0.0 3.5 7.0 10.6 14.1 17.6 15.8 14.1 12.3 10.6 8.8 7.0 5.3 3.5 1.8 0.0 0.0 . 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 18 9710-dra.xls Exhibit 0-1 0.00 3.52 7.04 10.56 14.08 17.60 15.84 14.08 12.32 10.56 8.80 7.04 5.28 3.52 1.76 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 18
-~
a
Rock Prairie Road Exxon
5 Year Event Hydrograph
10.00
8.00
6 .00
4 .00
2 .00
o .oo ~~~~-+~~~~-+-~~~--l1--~~~-+~__;=====,,,..,,--~~--+~----+--~~---l
0 .00 5.00 10.00 15 .00 20 .00
Time(min.)
25.00 30 .00 35.00 40 .00
---Pr1
--Qn+1
Pr2
--TOTAL PROPOSED
- - -Ex
6/10/97
Exhibit D-2
~
~ a
Rock Prairie Road Exxon
10 Year Event Hydrograph
12 .00
10 .00
8 .00
6 .00
4 .00
2 .00
0 .00 -t::-~~~-+~~~~-1-~~~__Jt--~~~-+~~.::::::::::~--------+~~~~-1-~~~---l
0 .00 5 .00 10 .00 15 .00 20 .00
Time(min.)
25 .00 30.00 35 .00 40 .00
Pr1
--Qn+1
Pr2
--TOTAL PROPOSED
---Ex
6/10/97
Exhibit D-2
~ ~
a
Rock Prairie Road Exxon
25 Year Event Hydrograph
14.00
12.00
10.00
8 .00
6 .00
4 .00
2 .00
0 .00 -JL~~~-+~~~~-1-~~~--'1--~~~--~~..-:::::::=::;:=:=oe.--~--~~~~--~~~---I
0 .00 5 .00 10.00 15.00 20 .00
Time (min.)
25 .00 30 .00 35.00 40.00
--Pr1
--Qn+1
Pr2
--TOTAL PROPOSED
---Ex
6/10/97
Exhibit D-2
-i
a
Rock Prairie Road Exxon
50 Year Event Hydrograph
16 .00
14.00
12 .00
10 .00
8.00
6.00
4.00
2.00
0 .00 ~~~~-+~~~~-1-~~~~1--~~~-+-~~~--=::+=::===------~~~~-+-~~~--l
0.00 5 .00 10.00 15 .00 20 .00
Time (min.)
25 .00 30 .00 35.00 40 .00
--Pr1
--Qn+1
Pr2
--TOTAL PROPOSED
- - -Ex
6/10/97
Exhibit 0-2
Rock Prairie Road Exxon
100 Year Event Hydrograph
18.00
16.00
14.00
12 .00
~ .!:!.. 10.00
a
8 .00
6 .00
4 .00
2 .00
o .oo ~~~~-+~~~~-1-~~~_..:i1--~~~-+-~~~~-+=======---..... ~~~~-+-~~~--'
0 .00 5 .00 10 .00 15.00 20 .00
Time (min.)
25.00 30.00 35.00 40 .00
--Pr1
--Qn+1
Pr2
--TOTAL PROPOSED
- - -Ex
6/10/97
Exhibit D-2
Rock Prairie Road Exxon
Stage-Discharge Curve
O .OOOec;.~~~~~~-+--~~~~~~__.~~~~~~~-+-~~~~~~-+-~~~~~~~+--~~~~~~~
330.0 330 .5 · 331 .0 331 .5
Elevation (msl)
332.0 332.5 333.0
Exhibit D-3
DEVELOPMENT PERMIT
PERMIT NO . 476
LOVELESS EXXON CONVENIENCE STORE @ ROCK PRAIRIE RD & WELLBORN
FOR AREAS OUTSIDE THE SPECIAL FLOOD HAZARD AREA
RE : CHAPTER 13 OF THE COLLEGE STATION CITY CODE
SITE LEGAL DESCRIPTION:
Lot 1, Block Two of Edelweiss Business Center
OWNER:
Jim or Kathy Loveless
7050 Wood Oak Dr.
Bryan, Texas 77808
409-774-4575
DRAINAGE BASIN:
Bee Creek Tributary "B''
TYPE OF DEVELOPMENT:
SITE ADDRESS:
Not Addressed
This permit is valid for site construction as shown on the approved construction plans.
The Contractor shall take all necessary precautions to prevent silt and debris from leaving the immediate
construction site in accordance with the approved erosion control plan as well as the City of College
Station Drainage Policy and Design Criteria. The Owner and/or Contractor shall assure that all disturbed
areas are sodden and establishment of vegetation occurs prior to removal of any silt fencing or hay bales
used for temporary erosion control. The Owner and/or Contractor shall also insure that any disturbed
vegetation be returned to its original condition, placement and state . The Owner and/or Contractor shall
be responsible for any damage to adjacent properties, city streets or infrastructure due to heavy machinery
and/or equipment as well as erosion, siltation or sedimentation resulting from the permitted work .
Any trees required to be protected by ordinance or as part of the landscape plan must be completely fenced
before any operations of this permit can begin .
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 outside the special flood hazard area. All
de velopment 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 project and all of the codes and
ordinances f the Cit)'. of College Station that apply .
Date
Owner/ Agent Date
Contractor Date
Figure XU
Development Permit n. n () _ ,. . f\ -Tr-+.
City of Coll ege Station, Texas ~ ~
Site Legal Description : cl:f-/ ~ rJ~
~C-/
-/.l 2-/ ~
Site Owner };:~~~
Ar chitec t/ C D /)
En gin e e r :--~-·-'~~----------
~, B .~ Con trac tor : f..J ---~---------
Dat e Application Filed : /-&l> .-. tj' f
Address : ]D~() UkuJ{kP~/l.~7?Jo8
Telephone : 7 7 t./--lf '7 7 S
Address : -------------Te 1 e phon e No : __________ _
Addres s : -------------
Telephone No : -----------
Approved : ------------
Appl ication is hereby made for the followin g d evelopment specific waterway alterations :
~pplication Fee
@ Signed Certifica tions
~Drainage and erosion control plan , w ith supporting Drainage Report two (2) copies each .
~ Site and Construction Plans , wi t h supporting Drainage Report two (2) copies each .
0 Other: -------------------------------
Th e information and co nclusions contain ed in the above plans and supporting documents comply
wi th the current requir e ments of the City of College Station, Texas City Code, Chapter 13 and its
asso ciated Drainage Po licy and Design Sta ndards .
As a condition of approval of this permit application, I agree to construct the improvements
proposed in this application according to th ese documents and the requirements of Chapter 13 of
th e College ation City Code.
Contractor
Figure XH Continued
CERTlFCCA TIONS : (for proposed alterations within designated flood hazard areas .)
A. I, certify that any nonresidential structure on or proposed
to be on this site as part of this application is designated to prevent damage to the structure or its
contents as a result of flooding from the l 00 year storm .
Engineer Date
B . l, certify that the finished floor elevation of the lowest
floor, including any basement, of any residential structure, proposed as part of this application is
at or above the base flood elevation established in the latest Federal Insurance Administration
Flood Hazard Study and maps, as amended.
Engineer Date
C I, 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 College Station City Code, Chapter l 3 concerning encroachments of flood ways and of
floodway fringes .
Engineer Date
I, do certify that the proposed alterations do not raise the level
._,.) of the I 00 year flood above elevation established in the latest Federal Insurance Administration
Flood Hazard Study.
Engineer Date
Conditions or comments as part of approval -------------------
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. All development 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 .
CITY OF COLLEGE STATION
111 CUSTOKER RECEIPT 111
OPER: KRODGERS . CT DRAWER: 1
DATE: 1/28/98 88 RECEIPT: 8885961
DESCRIPTION GTY AKOUNT TP TK
KISC ENGR CHARGE $188.88 3D CK
TIKE: 16:18:54
TOTAL PERSONAL CHECK
AKOUNT TENDERED
$188.80
$100.00