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Home My WebLink About48 Development Permit 276 Exxon ExpressDRAINAGE REPORT FOR EXXON EXPRESS HWY 6 & ROCK PRAIRIE ROAD Robert Stevenson Survey, A-54 College Station, Texas February 22, 1995 DEVELOPED BY: Exxon Express -Hwy 6 c/o Ray Hansen 730 N. Rosemary Bryan , TX 77802 (409) 846-7861 PREPARED BY: Kling Engineering & Surveying 4103 Texas Avenue, Suite 212 Bryan , TX 77802 (409) 846-6212 Drainage Report for Exxon Express -Hwy 6 & Rock Prairie Road Robert Stevenson Survey, A-54 College Station, Brazos County, Te~as February 20, 1995 GENERAL LOCATION & DESCRIPTION The proposed site location is Tract "F-4", Resubdivision of Ponderosa Place, Section Two, "Tract F", (hereafter referred to as Tract "F-4 ") located at the intersection of Rock Prairie Road and State Highway No. 6. The tract is bounded by Tract "F-3" of the beforementioned subdivision to the northwest, the frontage road for Highway 6 to the northeast, Rock Prairie Road to the southeast and Tract "F-1" of the beforementioned subdivision to the southwest (See Appendix 3: "Resubdivision plat of Ponderosa Place Section II Tract F). The tract is currently vacant and is covered entirely by grass. Proposed improvements consist of constructing a 3869 square foot Exxon Express Convenience Store, 8 covered gas pumping islands, 38 parking spaces, and installing 2 -12,000 gallon and 1 -8000 gallon underground storage tanks. DRAINAGE BASINS & SUB-BASINS Two primary studies have been performed on Carter's Creek and its tributaries. The first is a study performed by the Federal Emergency Management Agency in July, 1992, titled flood Insurance Study -Brazos County, Texas and Incorporated Areas. The purpose of this report was to investigate the existence and severity of flood hazards for Brazos County and to aid in the administration of the National Flood Insurance Act of 1968 and the Flood Disaster Protection Act of 1973. The second study is the Stormwater Management Plan, Phase III, performed by Walton and Associates -Consulting Engineers, Inc. contracted with the City of College Station in 1987. The purpose of this study was to gain knowledge of the existing and future drainage conditions in the City and to identify flood problems and flood prone areas. The subject tract was formerly a portion of the 3.81 acre Tract "F" of Ponderosa Place Section Two (hereafter referred to as Tract "F"), which has since been subdivided into Tracts Fl, F2, F3, & F4. A drainage analysis was performed and a drainage report prepared for Tract "F" in regards to the construction of the Victoria Bank & Trust, College Station Branch which is now built and situated on Tract "F-1". The Tract "F" study provided a detention pond that was designed to attenuate enough peak runoff for the full development of Tract F (see Victoria Bank & Trust Drainage Report Dated September 13, 1993). Subsequently, runoff for the resubdivision Tracts F-1, F-2, F-3 & F-4 has been attenuated as well. Therefore, no detention is needed for Tract F-4. Exxon Express -Hwy 6 & Rock Prairie Road Drainage Report Page 2 The site is located on a ridge line dividing the Bee Creek drainage basin, Lick Creek drainage basin and the Foxfire Tributary to Carter's Creek drainage basin. The site itself mostly drains into the Foxfire Tributary's basin, thus the tributary· is the primary drainageway. Secondary drainageways include a series of culverts and open ditches along Highway 6 until the flow reaches the Foxfire Tributary. (See Appendix 1: "General Location Map"). The site is not within the 100 year flood plain according to the Flood Insurance Rate Map for College Station , Texas. (See Appendix 2: "Flood Plain Map"). Almost all off-site runoff is intercepted by two faculties. The first being the curb and ·gutter system along Rock Prairie Road which leads into two curb inlets that discharge into the right-of-way of Highway 6, runoff then proceeds down an open ditch until it reaches Lick Creek. The second is an open ditch that runs parallel to the east line of Tract "F-1" and discharges into the detention pond on Tract "F-2" which is metered out into the Highway 6 right-of-way and proceeds to the Foxfire Tributary. Currently , the majority of the runoff from the subject tract sheet flows into the gutters along Highway 6 frontage road, proceeds to an open ditch, and then ultimately into the Foxfire Tributary. A portion of the tract sheet flows into the curb and gutter systems along Rock Prairie Road, then follows the discharge pattern that flows into Lick Creek as mentioned earlier (See Appendix 5: "Hydrologic Calculations -Rational Method). ·DRAINAGE DESIGN CRITERIA/FACILITY DESIGN Because of the detention requirements for Tract "F" have been met, no detention for Tract "F-4" is required. In the previous study performed by Kling Engineering, Tract "F" was divided into Drainage Area #1 and Drainage Area #2 . DA #1 is captured by the detention pond and DA #2, which contains Tract "F-4", bypasses the pond. (Reference Appendix 3 of the Victoria Bank & Trust Drainage Report Dated September 13 , 1993). To show that the detention requirements for Tract "F" have been met , the design storm for the 25 year return period will be used , even though the 10 year and 100 year storm were also investigated. The Rational Method was used to calculate peak runoff. A runoff coefficient of 0.35 was used for pre-development conditions while a runoff coefficient of 0.90 was used for post-development and impervious areas and 0.35 for post-development landscaped areas . This yielded a pre-development runoff of Q25 = 13.18 cfs . The detention pond outlet peak flow is 4 .00 cfs for the 25 year storm, leaving 13.18 cfs -4.00 cfs = 9 .18 cfs of allowable direct runoff from the site. The development site for Tract "F-4" can be divided into five drainage areas: Drainage Area #1 flows into the detention pond while Drainage Area #2, #3, #4, and #5 contribute to direct runoff (See Appendix 4: "Drainage Area Map"). The collective runoff of DA #2, DA #3, DA #4, and DA #5 for the 25 year storm is 6.31 cfs which is substantially less than the 9.18 cfs allowable. Therefore, the detention requirements are in compliance with city ordinances. The results for all the storm events are tabulated below: Exxon Express -Hwy 6 & Rock Prairie Road Drainage Report Page 3 Storm return period 10 25 100 Pre-Dev. Q Tract F (cfs) 11.54 13.18 15.56 Det Pond outflow (cfs) 3.84 4.00 4.82 Allowable direct runoff 7.70 9.18 10.74 Post-Dev Tract "F-4" (cfs) (sum DA #2 ... DA #4) 5.53 6.31 7.44 Most drainage will be sheet flow, curb and gutter, and open channel flow. The site will have three concrete flumes, two of which discharge at the right-of-way of Highway 6 and one that discharges into the .gutter of Rock Prairie Road. DA #1 has a Q25 of 3.64 cfs that discharges through the proposed driveway into the detention pond. DA #2 has a Q25 of 2.13 cfs that discharges through the proposed Highway 6 entrance into the Highway 6 frontage road curb and gutter system and ultimately into the Foxfire Tributary. DA #3 has a Q25 of 1.29 cfs that discharges through a concrete flume onto Highway 6 frontage and ultimately into the Foxfire Tributary. DA #4 has a Q25 of 2.38 cfs that discharges through a concrete flume into the curb and gutter system on Rock Prairie Road and ultimately into Lick Creek. DA #5 has a Q25 of 0.51 cfs that discharges through a concrete flume onto the Highway 6 frontage road and ultimately into the Foxfire Tributary. CONCLUSIONS A detention pond for Tract "F" of Ponderosa Place Section Two has been designed to attenuate runoff for the full development of the tract. Tract "F-4" Resubdivision of Ponderosa Place Section Two is a subsidiary of Tract "F" mentioned above. The sum of the peak outflow of the detention pond and the direct runoff from Tract "F-4" is substantially less than the pre-developed runoff for Tract "F". Therefore detention is not required for Tract "F-4" and no impact to upstream or downstream landowners is expected. "I hereby certify that this report (plan) for the drainage design of Exxon Express -Hwy 6 & Rock Prairie Road was prepared by me (or under my supervision) in accordance with the provisions of the City of College Station Drainage Policy and Design Standards for the owners thereof." Exxon Express -Hwy 6 & Rock Prairie Road Drainage Report Page 4 REFERENCES Stormwater Management Plan, Phase II: Drainage Policy and Design Standards, City of College Station, Ordinance No. 1728, prepared by: Walton & Associates, October, 1987. Stormwater Management Plan, Phase III: Drainage System Analysis, City of College Station, prepared by: Walton & Associates, August, 1986. APPENDICES 1) General Location Map 2) Flood Plain Map -Community No. 480083, Panel No. 0182 Effective Date: July 2, 1992 3) Resubdivision Plat of Ponderosa Place Section II, Tract F 4) Drainage Area Map I Grading Plan -Prepared by Kling Engineering & Surveying 5) Hydrologic Calculations -Rational Method kcs95 -0lb:\cxxoo.flll APPENDIX S . HYDROLOGIC CALCULATIONS RATIONAL METHOD ... 7 /-:: 'j~ 6 -:: ~~17 ~o /?_'/ ~ __ ; J //. .>) / I/ -// ~ n 0 31: m -4 "TI UI UI UI F88~ mcc ::Il )> )> ::Il ::Il mmm en en en en en en WWW a: a: a: << ::i ::i a: 00~ en en ...J I() I() I() u: ----·----- ,.4,.-t'"-: _Cf?. 'I' I I(" ___ __t ~ p._9,; ~-----_ ( Gi ,o. 3 ti' tf; x Q,,. '3:~~~(.J x a: .. -;'30 cf<_) d-~'11"-q" dre-4. ·;;-z ~--:---__ -_ ( o~;~(!; _-;~p/f)-_~~----~----· --,,, _ Ar~ .... -;._ __ 0. Z:f ~:.---__ -c, ~ P..r o -_ ~~ -__ : ~--- ~ _ ( -__ a, o :x u <-E_, X -::_a,; :J,0-2.s:=i{ ::g,~. _:. J <-; '", ) -de~ ""~J ' A tt-EA # '3 '; ( D1re~I r(.ufoff ) i j C c.35'(o .o+) + 0.'10(0.13) -----0.7-7 -~-----. ~ ' . --·---______ 0 :_11 ----------__!_______ ·-. ( Q,_. • i !; db ) ( -Ji~ ~_;,~L:L Z-::j (Ji.: --/. ~~ crS ) Ar t'«-? _o. 'Ji~-~---A 1 ~ o.)i_ ~_=J .:,-~--a. ~2. -D.??(0 -1'1....J t-0.9 o-(-O.-t't) ----------_ ___; -__ c _2__ ------v =--"";> .,_ _______ ·-== __ P.:_ 71 __ _ __ . "( Q,, 0 -2 ~~y :1~ ) (<0,, .-£;;y;;c~ l( 0: •• , ,/'? l dJ) - dr~tn Aqe Ar~.-.. Ii 5": ( D 11~ c~---~\,t~o ~ ~ l -' -:.. 0.7./-C> -C) 7 --. ----- _( g" =--~1f 4,} ( e,;~_~t;_)_:=_~ a,. .. c"~. -"') - D1 lllif K~o ~f'.'.'. "' DA 1.. 1 DA '3 +DA 4 + J)A 5 . 0 10 ·~-S-.5~cPs Z::. AlloZt->~ble. Qz,--=-f.o.)I c~s ~ ·,t.;1rowo..lol~ ;~~ -=--1.L/4 ~F s-< ·-A ffo w~ b 1 e K LING ENGINEERING & SURVEYING Consulting Engineers • Land Surveyors 4 103 Texas Avenue, Suite 212 Bryan , Tex as 7 7 802 B.J. Kling, P .E., R.P.L.S . S.M. Kling , R.P .L.S. Telephone 409/8 46-6212 Fax 409/846-8252 March 28, 1995 MEMO: TO: Veronica Morgan Asst. City Engineer City of College Station FROM: S. M. Kling ~ tA , ~--e~----:?~ RE: Exxon Express -Revised grading adjacent to frontage road. Attached is a revised grading plan for Exxon Express . The revision consists of the following : Post Office Box 4234 Bryan, Texas 77805 headwall 1) Regrading the east portion of the project to minimize the storm flow onto the frontage road. 2) Provide two 3' curb cuts at each end of east parking area and one 3' curb cut near air/water area. 3) Provide three 4' wide x 8' long concrete or rock rubble , 2" -4" diameter for erosion protection from the parking lot to the grass channel. 4) Construct a triangular shaped solid sod grass swale with side slopes of 4 : 1 or flatter, 0.90% channel slope, 0 25 = 3.33 cfs with a 0. 7 depth at the given flow rate. 5) Construct a straight headwall near the east corner of the property with a 2' approach apron. 6) Install approximateiy 19' of 12" PVC storm drain @ 1.0% slope, having a depth of 0.59 feet with a 0 2 5 = 3.33 cfs. 7) Tie 12" storm drain to back of existing curb inlet at the intersection of frontage road and Rock Prairie Road. Veronica Morgan Asst. City Engineer Continued -Page 2 8) Grade area adjacent to headwall and 12" PVC storm drain so as to have a minimum of 6" cover with slopes of 4: 1 or flatter. The purpose of the grassed triangular shaped channel is to intercept the storm flow from DA-2, DA-2A, DA-5 and convey this flow to the existing inlet at east corner of the property. The total flow to the inlet is 0 25 = 3.33 cfs. This flow previously drained to the Foxfire Tributary and with the authorization of TxDOT is being diverted to the Lick Creek basin. Project Description Project File Worksheet Flow Element Method Solve For Input Data Mannings Coefficient Channel Slope Left Side Slope Right Side Slope Dischar9e Results Depth Flow Area Wetted Peri meter Top Width Critical Depth Critical Slope Velocity Velocity Head Specific Energy Froude Number Flow is subcritical. EXXON EXPRESS TRIANGULAR CHANNEL Worksheet for Triangular Channel untitled EXXON EXPRESS TRIANGULAR CHANNEL Triangular Channel Manning's Formula Channel Depth 0.040 0.009000 ft/ft 4 .00 H :V 4.00 H :V ? 3 .33 ft3/s Q,00~ 0 .70 ft 1.95 ft2 5.75 ft 5.58 ft 0 .53 ft 0 .037719 ft/ft N ~&.r~fl6 1.71 ft/s 0.05 ft 0 .74 ft 0.51 ' z.~ i· Kling E ngi neering & Survey ing 2. 4• Mar 2 7 , 199 5 17:0 5 :13 Haestad M ethods, Inc. 37 Brookside Road W aterbury, C T 0 6708 (20 3) 755-1666 ~ H 1 NTS F lowM aster v4 .1 c Page 1 of 1 Project Description Project File Worksheet Flow Element Method Solve For Input Data Mannings Coefficient . Channel Slope Diameter Discharli!e Results Depth Flow Area Wetted Perimeter Top Width Critical Depth Percent Full Critical Slope Velocity Velocity Head ·specific Energy Froude Number Maximum Discharge Full Flow Capacity Full Flow Slope Flow is sueercritical. EXXON EXPRESS 12" PVC STORM DRAIN Worksheet for Circular Channel untitled EXXON EXPRESS 12" PVC STORM DRAIN Circular Channel Manning's Formula Channel Deeth 0.009 0.010000 ft/ft 1.00 ft ~ .1 3.33 ft3/s lOO., • 0 .59 ft 0.48 ft2 1 .74 ft 0 .99 ft 0.78 ft 58 .56 % 0 .004602 ft/ft 6 .97 ft/s 0 .75 ft 1.34 ft 1.76 5.54 ft3/s 5.15 ft3/s 0.004187 ft/ft Kling Engineering & Surveying Mar 27 , 1995 17:11 :26 Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 (203) 755-16 66 1 .00 ft 0.59 ft FlowMaster v4.1 c Page 1 of 1 Project Description Project File Worksheet Flow Element Method Solve For Input Data Mannings Coefficient Channel Slope Left Side Slope Right Side Slope Results Flow Area Wetted Perimeter Top Width Critical Depth Critical Slope Velocity Velocity Head Specific Energy Froude Number Flow is subcritical. A pr 5, 1995 13:19:53 EXXON EXPRESS TRIANGULAR CHANNEL Worksheet for Triangular Channel d :\fmw\exxon2 .fm2 EXXON EXPRESS TRIANGULAR CHANNEL Triangular Channel Manning's Formula Channel Depth 0.040 0.009000 tuft 2.20 6.12 5.94 0.57 ft2 ft ft ft H:V H :V 0.036895 tuft 1.78 tus 0.05 ft 0.79 ft 0.52 Klin g Engineering & Surveying H aest ad M ethod s, Inc . 37 Brook side R oad W aterbury, CT 067 0 8 (20 3) 755-1666 F lowM aster v4.1 c Page 1 of 1 * d y ·······-~--- ' p -J ~ -0. )i .. :r-- .-~ ::.8 ~' t -~. ~ ·.1 -- KLH NG E NGINEERING & SURVEYING 4103 Texas Avenue, Suite 212 Bryan, Texas 77802 B.J. Kling, P .E., R.P .L.S . S.M. Kling, R.P .L.S. MEMO Cons ulting Engineers • L and Surveyors Telephone 409/846-6212 Fax 409/846-8252 March 10, 1995 TO: Veronica Morgan Post Office Box 4 2 34 Bryan, Texas 77805 / \J-~ ~};.~'\ ~~~· 1-- ,\o . e ~ , w~~~11r / FROM: City of College Stat(\ /, ;f /) Danny Miller A) ~ ""-G . RE: Exxon Attached is a revised grading plan for Exxon Express located at the intersection of Rock Prairie Rd. and Hwy 6 . The revision consists of a 12" PVC storm sewer beginning with a slotted vane drain spanning the width of the driveway to intercept the flow from DA-2 as shown in the original report. The quantity of runoff is 0 25 = 2.13 cfs. Included is the manufacturer's specs on the slotted drain. The storm sewer then proceeds south with two grate inlets capturing DA-3 and DA-5 with quantities of runoff of 0 25 = 1.29 cfs and 0.51 cfs respectively . The storm sewer will then be tied into the existing curb inlet box located at the intersect ion . The total contribution to the existing box is 3 .93 cfs. This is flow that previous ly drained into the Foxfire Tributary Basin and will now drain into the Lick Creek Bas i n . It is my understanding that this was TxDOT's preference . If you have any questions, please call. R-3599-A Slotted Vane Drain NEENAH's Cast Iran Slotted Vane Drain offers ease of installation along with the superior vaned configuration to capture previously unexpected quantities of water when placed perpendicular to the flow. Installation is accomplished by sawing a slot in the top of conventional PVC pipe, placing the pipe on grade, installing the Cast Iron Slotted Vane Drain in place and pouring the concrete. Drain is pedestrian and bicycle safe and can be used with confidence in urban areas. When used in conjunction with a vane grate inlet, virtually all of the water in the street which would normally bypass the catch basin can be captured, thus increasing the space between inlets. An additional benefit is the added safety factor obtained should the catch basin be plugged or covered with snow. The unit may also be installed at entrances and exits of parking areas to capture sheet flow before it enters a commercial street. Feel free to contact our field personnel or our Product Engineering Dept. at Neenah for further detailed information. ( 4) 1 /2" DIA. CORED HOLES DR AINS 90l T TOCCTH ER OJT REO"D AT BClL TO AU.OW On longitudinal slopes of 096 to 696, this unit captures approximately 0.5 cubic feet per second, per lineal foot. (4) 1/2" DI'-CORED HOlES F'OR B ~. 11NC TOCETHER DRAINS - WIRE DRAIN TO PIPE NEENA FOUNDRY COMPANY SECTION THRU VANE DRAIN PAVEMENT VANE DRAIN IASE JUNG( a.LARAHCE OJT LONCITUDIHAI.. SLOT TO nT POSITIONING LUCS ON BOTTOM ~ VAN[ ORAIH CASTING BLOCkS TO ADJJST PIP£ TO CRA.OC ANO ASSl.JM: e• MaH. CONatCTC TM!OCN(SS 9£.H[A TH PIPE g• WIN. C0NCR£1[ 114Q(N[SS AT $10£S AHO BOTTtlif OF SEWER PIP{ j KLING E NGINEERING & S U RVEYING C o n s u l ting E n gineers • La.nd Sur veyors 4103 Texas Avenue, Suite 212 Bryan, Texas 77802 Telephone 409/846-6212 Fax 409/846-8252 B.J. Kling, P.E., R.P.L.S . S.M. Kling, R.P.L.S . MEMO TO: FROM: RE: Veronica Morgan, P.E. Asst. City Engineer City of College Station s. M. Kli ~-M' July 19, 1995 Exxon Express -Revised grading plan Post Office Box 4234 Bryan, Texas 77805 Attached is a revised grading plan for Exxon Express located at the intersection of Rock Prairie Rd. and Hwy 6. The revision consists of the following: 1) Repositioning of Concrete Flume in southeast parking area to drain from drainage area 4 to drainage area 5. 2) Repositioning of sign in southeast parking median . The grassed triangular channel will now intercept storm flow from DA-2, DA- 2A, DA-4 and DA-5. Total flow to existing inlet is 0 25 = 5.28 cfs. The attached hydraulic analysis indicate the channel and 12" PVC to be adequate for 0 25 , and that the channel is adequate for 0 100 . However, the 12" PVC @ 1.0% has a capacity of 5. 28cfs and 0 100 = 6. 75cfs. The Slope of the 12" PVC would need to change to 1. 70% to carry 0 100 • Kent with Brazos Paving has indicated he can raise the upstream end of the pipe to 304.9 (plan 304. 74) and will do so thereby providing capacity in the 12" line of 0 100 . -N"' "'"'"' ---~c:.c:. NNN CAt..c Ul--4-11oAI5 klZ lZ eM~Pr::> Drz41N~ws:-5)l)l.oAJ ExpacrGS U,I/, 4 -Ft-ow To c_ = o, 90 I J... _±0 ...,.. 1-!'.:t . C'.-J , I l./ I I I(' I I I Project Description Project File Worksheet Flow Element Method Solve For Input Data Mannings Coefficient Channel Slope Left Side Slope Right Side Slope Discharge ~'$ Results Depth Flow Area Wetted Perimeter Top Width Critical Depth Critical Slope Velocity Velocity Head Specific Energy Froude Number Flow is subcrit ical. Triangular Channel Worksheet for Triangular Channel d :\fmw\exxon . fm2 EXXON EXPRESS TRIANGULAR CHANNEL Triangular Channel Manning's Formula Channel Depth 0.040 0.009000 ft/ft 4.00 H :V 4.00 H :V 5.28 ft3/s 0.83 ft 2.75 ft2 6 .84 ft 6 .63 ft 0.64 ft 0.0354 73 ft/ft 1.92 ft/s 0.06 ft 0.89 ft 0.53 - / '3 32 3,3z I 4' t 4 '- K ling Eng in eer ing & S urveying Jul 18, 1995 16:01 :56 Haest ad M ethods, In c. 37 Brooks id e Road Waterbury, CT 06708 (203) 7 5 5 -1 666 0 .83 ft ~~ H 1 NTS F lowMaster v4 .1 c P age 1 of1 Project Description Project File Worksheet Flow Element Method Solve For Input Data Mannings Coefficient Channel Slope Diameter Q Dischar g e~ S Results Depth Flow Are a Wetted Perimeter Top Width Critical Dep t h Percent Fu ll Critical Slope Velocity Velocity Head Specific Ene rgy Froude Number Maximum Discharg e Full Flow Capacity Full Flow Slope Flow is supe rcritica l. Circular Channel Worksheet for Circular Channel d :\fmw\exxon.fm2 EXXON EXPRESS 12" PVC STORM DRAIN Circular Chann el Manning's Formula Channel Depth 0.009 0 .010000 ft/ft 1.00 ft 5 .28 ffl/s 0.'85 ft 0.71 ft2 2.33 ft 0.72 ft 0.93 ft 84 .52 % 0.009106 ft/ft 7.46 ft/s 0.86 ft 1.71 ft 1.33 5.54 ffl/s 5.15 ffl/s 0.010528 ft/ft Q, ,_, 0 ~ Co ·,ISc:..,~t ~e-,~ ~ r'i' PV~ cd\Q..c\ u ~~ ) 1-9-. Slo\>"2--~~~ lvitJ""'~v.-cQ_ ~ \ .\0°co ~..e.YV \~\?\J G l.,0(l;)vttSL ""'c.._\.l.JL ~({'tlt.-\ ~ ""~ Q,00~Lo:-tS G\.-~. 1 .0 0 ft 0 .85 ft Kling E ngin eering & Surveying J u l 18 , 1995 16:0 7 :08 Haestad M et hods, Inc. 37 B rookside Road W at erbury, CT 06708 (203) 7 5 5 -1666 F lowMaste r v4 . 1 c Page 1of 1 Project Description Project File Worksheet Flow Element Method Solve For Input Data Mannings Coefficient Channel Slope ·Left Side Slope Triangular Channel -Q100 Worksheet for Triangular Channel d:\fmw\exxon.fm2 EXXON EXPRESS TRIANGULAR CHANNEL Triangular Channel Manning's Formula Channel Depth 0.040 0.009000 ft/ft 4.00 H : V Right Side Slope DischargeQ \QQ "=- 4.00 H: V 6.75 ft3/s Results Depth Flow Area Wetted Perimeter Top Width Critical Depth Critical Slope Velocity Velocity Head Specific Energy Froude Number Flow is subcritical. Jul 19, 1995 08:14:57 0.91 ft 3.31 ft2 7.50 ft 7.27 ft 0.71 ft 0.034330 ft/ft 2.04 ft/s 0.06 ft 0.97 ft 0.53 t---3, 0 4 I ----f--·-s i tot./ _1 -----l 4 '-------4---· I ·-4---.1 Kling Engineering & Surveying Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 (203) 755-1666 0 .91 ft & ~~ H 1 t, NTS .c-- t' FlowMaster v4.1 c Page 1 of 1 Texas Department of Transportation Edwin Hard Transportation Planner City of College Station P.O . Box 9960 1300 No. Texas Ave. ,Bryan,Texas 77803-2760 P.E>:-fle*-~'fAN;-"fE*A&-11'Be5-3-~ ( 409) 778-2165 February 9, 1995 College Station, TX 77842-9960 RECEIVED FEB ~ ·4 1~ Dear Sir: Thank you for the opportunity to review the permit for the proposed Victoria Bank & Trust driveway, which is to be located on the SH 6 West Frontage Road near Rock Prairie Road. The tie-in to existing pavement is not acceptable . The existing curb and gutter should be removed and the proposed concrete drive should be placed along the edge of the existing pavement. The proposed concrete should not be placed under any asphaltic pavement. The island should also be offset from the travel lane by at least two fe et. In addition , I agree with Veronica Morgan's statement that plain grey concrete should not be used on the island . AASHTO encourages contrast between the island and roadway surfaces , and the plain grey concrete would not provide the desirable contrast. Also, water shall not be permitted to leave the site thru the driveway and cross th e frontage road. The water will be required to stay within gutter of the driveway and the frontage road .. The city is also recommended to investigate several things. First, the use of wheelchair ramps should be examined to see if ramps would be required in the future. If the ramps would be required in the future , it is recommended that they be installed now. Secondly , there is a "No Left Turn" sign proposed off of the right of way, and according to the MUTCD , a "Keep Right" sign is more appropriate. Please investigate to see if you concur with this and if you can recommend the change to the owner. Also , AASHTO states that curbed islands "should have fixed-source lighting or appropriate delineation." Please insure that they will meet this requirement. Again, thank you for the opportunity to review this permit and if you have any questions please contact Terry Paholek at 778-9783 . TAP Sincerely , IJ~-;µ~ Patrick T. Williams , P.E. Area Engineer An Equ a l Opportunity Employer f ' . ' .. FEB-23-95 THU 12:~2 In~erPlan Archi~ec~s 7134922554 FACSIMILE TRANSMISSION OFFICE (713 ) 492-2206 FAX (71 3) 49'2.-·-.2554 P.01 COPIES TQ: ..... ~~.;·---~-1~-~--.~_I3t~.·-~::;: __ at-·----- /~ ') 'iq ~ 2 () 8 ·-0 3 (, 3 FIRM= __ c_r_r_Y_.2r .. ~~-~-~~-~:.~::.J~f A_T_~:_q_N __ . __ --·-··--.·(-r"'• ·~-.. ------·-·••••··----- ·-·-·-·-··---·-.. ·--·-~-~·-·"--······------- MAR' l"''I:') Mr:• I 1 i·;,; FROM= -----oe~~~---.-1}.~~ .~ .• :..~~.:: ...• T.--····--H .. •-·--- RE: EXXO N EXPlil.f.'..SS AT m-r~. 6 AND ---·--................ _ .. .._. __ .. ..,. ... ,.._ ..... ,..,--. --- PR AI R I F.: ROCK 1101'0 •• CO LL EG E STATION, TEX A~ TOTAL NUMBER· OF PAGES ··---___ ). ___ _ IN CLUDING COVER S rifTi .: cx:>MMENTS -· .-.... ,., .. -··--· .... ··~··· .......... ____ .... . ·--------·--···· .... ·-·-·· --·-···--··-····-·""-· ··-·---·---- ·---------·-•••••-·-•••-·o•o~ .. M oo • ·--·~·--·--.. ·--------~-·-•••••••• •-'••• • •••••" ••-•-.-.o -oo• '°' "'" _..,__ _______ ,_,. ---·------· .. 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". -----...... ~-···--····· ~-·· ... -··-~-··-.... ·---·-·---------......... --···", ··-----·----··· .. ______ ....,.__,.,, ...... ~ .... ------··-............ ,. --·---·-... ·--------..... ,,.,._ ... _,, ___ ., .••..... ,..,._., ................. _. _____ _ -''-----·--~-·----··· .. --·····-· -~---.. ·---·-·-------.... ···-··· .. ··---·-----"·-.. , --·---~-- CONFIDENTIALllY NOT ICE:: THIS MESSAGE IS IN TENliEO ON!... y r::)R r ~1c :.J S£ Of" THE INDIVIDUAL OR ENTITY TO '~HICH IT !S A.DD k f~'.:iLO AND MAY CONTAIN INFORMATION THAT IS PRIVILEGiO , C0N t~)EN11Al., ANO EXEMPT FRO~ DISCLOSURE llNOt'.f\ .<\Pt"q CAB LF: LAW . IF THE READER OF THIS MESSAGE rs N01 IHE INTE.N DE;D H ~Ci i!-F..>-iT, OR THE EMPLOYEE RESPONS18l£ !~();{ or~Lrllt~J N\'i rnt: Mt-::$5 AGE TO THE INTENDED RECIPltNT , YO ~! ARE: HERF.H 1 NGTlF:f.D Tl·iAT .ANY REPRODUCTION, DISTR !5U 1"l(),1{ OH COPING (.If TH iS COMMUNICATION IS STRICTLY PROHIBll ED . If" 'fOU HAVE: ~ECOVW 'fHIS COMMUNICATION IN ERROR. PU.AS£ N<~i'IFY us· Bf it:LEPHONE l!;4MEOIATELY AND RETurm 1°H€ l)l~l(;1 N;1t ' MESSAC~ r o THE ADDRESS BELOW VIA THE U.S. PO S'fAL SERV!t l. THANK YOU ,-====---n=:n~~ .. ,~:111 ~c·i"t~'Vl::l .1 .:t.J:fM~~"z::'::::. ~~' ~"'i-.a~;·r.::.-=.,-~~~'l\!:.C::·====<--=== ONE PARK TEN PLAZ A • 162 2.5 PARK TEN PL.AC~ * SI llTF 1 rin lit ~-U11 l,Tr'll\l T J:"VA~ '77r'lrJ.:.A '" " . " ' .. FEB-23-95 THU 12:03 In~erPlan Archi~ec~s 7134922554 P.02 INTERPLAN ARCHIT EC TS INC. Feb::r;uai:y City of C:,;1J~91~ 1~~:-:U.~:ri P.O.Bo x 99 \j.f) Co 11 e gE! B ~. "~~ .. Ir; n / ,.,. ,, 'Y.a .s 77812 PLANNING Attn; H~:, \l\.•rq·r,J. ::li M<:.nq•.:1.n Aa~\~tant ~Sty Engi neer RE: B>';.(<:i n &~ ·pn·";31>t ~I: H"'Y · 6 and Prai rie fi'<)·~~ r :"1:\•:3. t.>.1 1. l t' ~JC: ,St: ·:i I' l C ': 1 'ri-;· xas I N H l~I ORS Rega rdi ng lh~ a bo ~e r•f~r~n ced project, we h~r~ty a~kno~l~~g e an d acce pt C'l~21 ':in ~d·.~'~r .. l\lJ l'l\ f.1-:ir our plans submi tt-;:i ;J f n r p~r.11 1 \t, l.:he drawi ng ~\lbrnlU.~t1 by K:li ng Engineers shcHd•"9 1_•h::HHjCJ:> ~:o the en tr a n c ~ c. f: t h ,~ pr ;.> ~1 •!: r t y f r. om Hwy • 6 f r. on t ;i1 .-j ,;: , P 1 ~a ''Hi nd e .i· t o attache d ~xhibit. If you h"i 't <? .:'.my l.Ji.Jf<;l.ions , please do not h ll::'S~t .. :'lfu l:ci C:t1 .l1 our offi.ce s. MM/g im O N E PAR K l'E !·J f'!1J..;!/\. 1s ;/f:i ?A ~V. 1EN PLACE. SUITE l~j (J. ~1.,u :~T O \J . l l:;.O.S 77084 713 492-22 06 FA /: J l 3 492-2554 .. " >. " ' '. I '. '' 'I . ,, •' FEB-23-95 THU 12:04 In~erPlan Arch i~ec~s ., 1i.:1,1t!1 :.> 1;,:.>1 'O '~'J!J fi.jtj :\:!!"•!' KLlNG .t::NGI< . . ·· N 57'47'J2 ~ E .._.....,..,.,,>I,_ 248.00 FT ' I ~\u:: 1 ''=20' N 5T47'32" E 248. 00 FT ,. -·--- THAC T "f ~,.1" ~~.;;. • 7 A. ? 4 ">; .:iCJ'' ··n :J' ~:r;...,r '.:·l~N :~:;, .. ,. .. : FD 1' .. i~ M.U : ;: G ····-...... \I Tf:M!NAi~ (.IJi'P '1 t ND ui: C!.J P.v!: (l40 fH -:::a:sj ' ' Li-_l _ \ urg: CF WORK \ 7134922554 P.03 ~ 00~ I I I I 1 I I \ I I I . I I ' I I I I __ :..::.::~-=.-::..~ .. :-~.::::::.: _.::.·_·;. -~~:.-:!::..:::=. ========== _., ii ..,. . ' .,.. DEVELOPMENT PERMIT PERMIT NO. #276 FOR AREAS OUTSIDE THE SPECIAL FLOOD HAZARD AREA RE: CHAPTER 13 OF THE COLLEGE ST A TI ON CITY CODE SITE LEGAL DESCRIPTION: Tract F-4 Ponderosa Place Section Two SITE ADDRESS: 3998 East Bypass OWNER: Ray Hansen 730 N. Rosemary Bryan, Tx 77802 DRAINAGE BASIN: Foxfire Tributary and N. Fork Lick Creek TYPE OF DEVELOPMENT: This permit is valid for site grading and clearing only. Contractor is responsible for the installation of silt fencing as shown on the grading plan. 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/outside the special flood hazard area. All development shall be in accordance with the plans and sp cifications submitted to and approved by the City Engineer in the development p r it application for the above named project and all of the codes and ordinances of t e City of College Station that apply. 7 Date I t ·~1taki-~1~ ~-1~-JLJ llAu., / owk_~ooce 6Jr ~ I.~~~ (oii.-&;-~~~ •\wfb{ dt~ ~t ~~ /-Nw ok ~~ • ·IJlW--~Vd ~ ~~ 4 61.. 'ft,w) e ~~ ~c.iel-b ~ aJJfJ_ ~ Ji,.._. ./ • ~-\.> Q.ll0.. .._.} ~ ~~ -tw.. ACCOUNT NO. _________________ _ 323398 Paid by_ Check {15L{s-c:;:sh __ _ 1845 or- --~19C!. t'JO ~~+.----:.:.:___::~~~~::::-----=-~' $ ,I~ tJ •'IHST NATIONAi, R-'NK ST-~;~ ,lllllil. BRYAN , TEXAS 77802 $!i'----------- '»I : • • j •o 2 jO :Ji•: •a~ s Figure XII Application Form Development Permit ----·- Inside/Outside Established Flood Hazard Areas City of College Station, Texas (re: Ordinance No. 1728) Site Legal Description: Tract "F-4 11 of Resubdivision Ponderosa Place Section Two, Tract F .. Site Address: __ H_w..._y_6_a_n_d_R_o_ck_P_r_a_i _ri_· e_R_o_a_d _____________________ _ Owner: Ray Hansen Architect/ Engineer: Kling Engineering & Surveying Contractor: unknown Date Application Filed: February 23, 1995 730 N. Rosemary Address: Bryan , TX 77802 TelephoneNo.: (409) 846-7861 4103 Texas Ave. Suite 212 Address: Bryan. TX 77802 Telephone No.: (409) 846-6212 Address: ------------Telephone No.:---------- Approved: ___________ _ Application is hereby made for the following specific waterway alterations: Development of an Exxon Express Facility; Detention is not required. Attached as part of this application: O Application Fee O Signed Certificate O Site and Construction Plans, with supporting documentation: two (2) copies of each a Other: Ora i nage Report ACKNOWLEDGEMENTS: , as owner, hereby acknowledge or affirm that: The above Drainage Plan and supporting documents complies wiht the requirements of Ordinance No. 1728, and Date tfJ? =--::--------------------~ Developer Date f? -=---------------------~ Contractor Date Page 1of2 Figure XII Continued CERTIFICATIONS: A. I, certify that any nonresidential structure on or proposed to be on this site as part of this application meets flood-proofing requirements as set out in Section of Ordinance No. 1728 · Architect/Engineer Date B. I, certify that the finished floor level of the lowest floor, including any basement, of any residential structure as part of this application is or proposed to be at or above the base flood elevation as established in the latest Federal Insurance Administration flood hazard study and maps, as amended. Architect/Engineer Date C. I, B. J. Kl i nq , certify that the alterations or development covered by this permit shall not diminish the flood-carrying capacity of the adjoining waterway or crossing this permitted site and that such alterations or development are consistent with requirements concerning encroachments of floodways and of floodway fringes as illustrated in the latest Fed l Insurance Study. D. I, do certify that any alterations, addressed in Certification "D" do not raise the level of 100-year flood as referred to Certification "B". Architect/Engineer Date REVIEWED FOR APPROVAL: ---------=----=--:,.......,...----:--:---:-.,.....------Floodplain Administrator Date APPROVAL: Special conditions or comments as part of approval: --------------------- Page 2of2 forms\dplpp.doc 11/91 • JI~ ~17 A RECEIVED FEB 2 7 1995 INTERPLAN ARCHITECTS INC. February 23, 1995 City of College Station P.O .Box 9960 College Station, Texas 77842 PLANNING Attn: Ms. Veronica Morgan Assistant City Engineer ARCHITECTURE RE: Exxon Express at Hwy. 6 and Prairie Rock road College Station, Texas Dear Ms. Morgan: INTERIORS Regarding the above referenced project, we hereby acknowledge and accept as an addendum for our plans submitted for permit, the drawing submitted by Kling Engineers showing changes to the entrance of the property from Hwy. 6 frontage. Please refer to attached exhibit. If you have any questions, please do not hesitate to call our offices. Meijer Pres dent NCARB Certified Registered Professional Texas-Florida-Colorado cc. Mr. Ray Hansen MM/gim ONE PARK TEN PLAZA• 16225 PARK TEN PLACE• SUITE 100 •HOUSTON, TEXAS 77084 713 492-2206 FAX 713 492-2554 TO: FROM: RE: I I P·re I . I I i~r · B ill de : s --t---~ -------=-=+=--~-I ---r ---t --- ' I MEMO Veronica Morgan Asst. City Engineer May 2, 1995 City of College Station, Tx. 77842 Charles Taylor Job Site Phone 764-7606 Express Mart 3998 State Highway 6 College Station, Tx. 77840 1. See attached traffic control plan for required work on storm sewer. 2. Tie storm drain to back of existing curb inlet using 12" Schedule 80 PVC. Note: Copies sent to Pat Williams, D.O.T. P.O. Box 4062 Victoria, Texas 77903 Office 578-8008 Home: 576-1452 l ~ I f ~ l I " I I t I I I :z:: 1-x:: ~ i r~ I~ I -N -r: 0' I 1 I u ~ \JI '"' l. l l I -ii ~ x:. I '-/ ~ !).... . 1 1 ~ ~ I I , . I I I I I I ·~~CITY OF COLLEGE STATION ~ ENGlf'.EERING DIVISION ~~ Post Office Box 9960 1101 Texas Avenue February 16 , 1995 TxDot 1300 N. Texas Ave. Bryan, TX 77803-2760 Attn: Patrick Williams College Station, Texas 77842-0960 (409) 764-3570 RE: Amended Driveway Permit Dear Mr. Williams : Per your letter, please find enclosed an initialed copy of the amended driveway permit. I you should need any further assistance, please do not hesitate to call . Texas Department of Transportation Veronica Morgan City of College Station P.O. Box 9960 1300 N. Texas Avenue, Bryan,Texas 77803-2760 F:t.tr.~~Y.tt:M;-TE"X'/l:S"77~~ • (409) 778 -2165 February 9, 1995 College Station, TX 77842-9960 RE CEIVED FEB 1 4 1995 · Dear Ms . Morgan: As discussed in the February 9, 1995 phone conversation between Terry Paholek and yourself, here is the amended driveway permit that extends the expiration date of the permit for the driveway on SH 6. If the city concurs , please initial the change and forward a copy to me and Mr . Ray Hansen. Thank you for your cooperation and if you have any questions please contact Terry Paholek at 778-9783. TAP Attachment Sincerely , ~ ·-··· Patrick T. Williams , P.E. Area Engineer An Equal Opportunity Employer .s'tatc Dcparuncnt of Highways and Public Transportation Form 1058-Rcv. 12-86 Permit to Construct Access Driveway Facilities on Highway Right of Way To: Victoria Bank & Trust Hwy. SH 6 Permit No. __ _ Control Section The State Department of Highways and Public Transportation , hereinafter called the State, hereby authorizes Vi eta r i a Bank & Trust , hereinafter called the grantee, to (re) construct an access driveway on the highway rjghtofwaya_butting_highwayno .State Hwy ~n Brazos . County,locatedapprox. 170' North of intersection ot West Frontage Road & Rock Prairie Road. Subject to the following: l . The grantee is responsible for all costs associated with the construction of this access driveway. 2. Design of facilities shall be as follows and/or as shown on sketch: All construction and materials shall be subject to inspection and approval by the State . 3. Maintenance of facilities constructed hereunder shall be the responsibility of the grantee, and the State reserves the right to require any changes, maintenance .or repairs as may be necessary to provide protection of life or property on or adja- cent to the highway. Changes in design will be made only with approval of the State. 4. The Grantee shall hold harmless the State and its duly appointed agents and employees against any action for personal injury or property damage sustained by reason of the exercise of this permit. 5. The Grantee shall not erect any sign on or extending over any portion of the highway right of way, and vehicle service fixtures such as service pumps, vender stands, or tanks shall be located at least twelve (12) feet from the right-of-way line to ensure that any vehicle services from these fixtures will be off the highway. 6 . This permit will become null and void if the above-referenced driveway facilities are not constructed within six (6) months from the issuance date of this permit. 7 . The Grantee will contact the State 's representative Mr· Delmar L · Smith telephone ( 409) 778-8054 at least twenty-four (24) hours prior to beginning the work authorized by this permit. PERMIT IS EXTENDED FOR SIX ADD;TIO~ MONTHS FROM FEB RUA RY 9, 199 5. //f7.,..J \J. Dateoflssuance Se tember 12, 1994 REVIE\JED BY: State Department of Highways it~~+ and Public Transportation r~~ Patr'iCkT:Wilii§m89EQi.Jl~E. Area Engineer The undersigned hereby agrees to comply with the terms and conditions set forth in this permit o drivew•f4~UJ·~~ A '( € 4 l s . vv. I '.} h. t Jt; d. , t .rl(ed ~ c:.arr+rcll~Acees) tt1<ect. "( (SH&l R.,.,p e y1} er lt'-rt - ) ' . ·~, CITY OF COLLEGE STATION 1101 TEXAS AVENUE S. COLLEGE STATION . T X 7 7840 C E R T I F I C A T E 0 C C LI P A N C Y OWNER'S NAME: TIG ER HOLDINGS 1 INC ADDRESS: TEXAS AVEN UE S OU T H, 3938 PROJECT : EXX ON EXPRESS MART LOT: BLOCK: SUBDIVI S ON: P!=.F'.M IT #: 'J'.Y.1 0s::;::8 I HAVE EXAM IN ED THE OFFICIAL ZONING MAP o r THE CITY OF :oLLEGE S TATI ON AND DO H EF'.EBV CERT I FY TH?H THE r1BOVE DE SC F: I BED ~-AND MAY BE OCC 1JF' I ED I i\1 ACCORDA NCE WITH TH E DISTRICT REGULATION roR DIS~RICT GROUP B -BUS I NE S S ,DIS TRICT, ORDINANCE N0.1538 SUBJECT TO TH E f"OL.LOl.J I NG VAR I ANCES, EXCEPTIONS OF'. SPEC: I Pd __ PEDUIREMENTS: -·-----·--·-----· I HAVE INSPECTED THI S BUI~D ING AND FIND THAT IT CAN BE USED AS GRO UP B -BU SINESS GR OUP B OCCUPANCY CLAS SI F I CATI ON AS DEFI NED BY T HE STANDARD BUILDING CODE SUBJECT TO T.HE FOL LOl.-J I NG S P EC IFI C REQU IREMENT S: _11.;, s (. Q..:__ e )( ~l t 1 ci_es._~~--, K '~ c l.-. ~ n -'i: ' ~ t \,._ \. .. _s 9 a L ~ ~-:e m ~ ~' · _'Jl.nP2f;_t__Efi.Q__?QyK£b Ff _!_1 __ L l_q_J~ ~~ DATE / fl~p <1P:t. ~Uh) F6Jce-1A./61fl1.-LcD J3Y /1//4tJ51 .J.:J., 1qq~ ~R:/(1.::5JI" coP</ o r: fli.£0 ~~k£D A-cc£:::6 6&/S6;ne-<lT] FtJR-1/ISJ.1 C.OPr/ Cf?, e Cl!> ..s#/1R:SD .t1 . \ ]),Jn~113e G~;r.c,Jr, P,,c;J€ 11-1€' R.'€>-n~/;JAf'e, ~p ·.,--11 tJ' 6 ~ R:EI> /}CC&"ss G~~m€AIT 6G!a/5'6) ~.S r:.s i ~-J Bt/ Se'PT: 8 ,, !?1~ ?R'othPE r::-1AJ~/():::1,-'}L qdA/39tlTE~ 1,J 7/-le "14)::X)/V7 tJ F J3750 o_::, rCJ~ 7H€ lE(()U1,fJE'D P.-9/Jl/lk; ~ /:/CG.e!!5t5 GA:SE/J?ErVI. J-1/J</ 8/JL-ES //Jt/:Sr eE ld.6T/tLL€o /1J__fJ;iJ6J /He -e/Y-/iJP ?/JJc/ncdr tJ,C .6)-fYJKE.J.) /ice-c::-~ &A5cOJ€)/ € 6JL/ ~E?lc€ /1Jd::51 13€' 1t/~7/JLt:E£> C:.Oic!CEc7ZY /II -// L.ocA 1./0~ c:2o r/, lo . /..;.Jc fi)a;C'TH' (}F 'THc ?/JJE47C:h __ } DEVELOPMENT PERMIT PERMIT NO. #276R FOR AREAS OUTSIDE THE SPECIAL FLOOD HAZARD AREA RE: CHAPTER 13 OF THE COLLEGE STATION CITY CODE SITE LEGAL DESCRIPTION: Tract F-4 Ponderosa Place Section Two SITE ADDRESS: 3998 East Bypass OWNER: Ray Hansen 7 3 0 N Rosemary Bryan, Tx 77802 DRAINAGE BASIN: Foxfire Tributary and N Fork Lick Creek TYPE OF DEVELOPMENT: This permit is valid for site construction. A revision to the parking lot drainage was approved on July 20, 1995 at the owners/c ontractors request. Contractor is responsible for the installation of silt fencing as shown on the grading plan. 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 machine1y 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/outside 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 project and all of the codes and ordinances of the City of College Station that apply . Administrator/Representative Date Owner Date DEVELOPMENT P PERMIT NO . # 76 FOR AREAS OUTSIDE THE SPECIAL D HAZARD AREA RE : CHAPTER 13 OF THE COLLEGE STATION CITY CODE SITE LEGAL DESCRIPTION: Tract F-4 Ponderosa Place Section Two SITE ADDRESS: 3998 East Bypass OWNER: Ray Hansen 7 3 0 N Rosemary Bryan, Tx 77802 DRAINAGE BASIN: . . ~ ~~ Foxfi re Tributary and N Fork Lick Creek . ~ ~ ~ ~k' c}.t--~ ,,f-z.o)'i 5 ~~:;e?~1~:~~~JJ;~~~~::::.R~ C~e~ble for': ~j mstallatzon of s1 /t fencing as shown on the gradmg plan. ~ 1-l ~ ~ 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 sha ll be responsible for any damage to existing city streets or infrastructure due to heavy machinery and/or equipm ent. In accordance wi th Chapter 13 of the Code of Ordinances of the City of College Station, measures shall be taken to in sure that debris from construction, erosion, and sedimentation shall not be deposited in city streets, or existing drainage facilities. I hereby grant this permit for deve lopment of an area inside/outside 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 project and all of the codes and ordinances of the City of College Station that apply . Administrator/Representative Date Owner Date DRAINAGE REPORT FOR EXXON EXPRESS HWY 6 & ROCK PRAIRIE ROAD Robert Stevenson Survey, A-54 College Station, Texas February 22, 1995 DEVELOPED BY: Exxon Express -Hwy 6 c/o Ray Hansen 730 N. Rosemary Bryan, TX 77802 ( 409) 846-7861 PREPARED BY: Kling Engineering & Surveying 4103 Texas A venue, Suite 212 Bryan, TX 77802 (409) 846-6212 Drainage Report for Exxon Express -Hwy 6 & Rock Prairie Road Robert Stevenson Survey, A-54 College Station, Brazos County, Te~as February 20, 1995 GENERAL LOCATION & DESCRIPTION The proposed site location is Tract "F-4", Resubdivision of Ponderosa Place, Section Two, "Tract F", (hereafter referred to as Tract "F-4") located at the intersection of Rock Prairie Road and State Highway No. 6. The tract is bounded by Tract "F-3" of the beforementioned subdivision to the northwest, the frontage road for Highway 6 to the northeast, Rock Prairie Road to the southeast and Tract "F-1" of the beforementioned subdivision to the southwest (See Appendix 3: "Resubdivision plat of Ponderosa Place Section II Tract F). The tract is currently vacant and is covered entirely by grass. Proposed improvements consist of constructing a 3869 square foot Exxon Express Convenience Store, 8 covered gas pumping islands, 38 parking spaces, and installing 2 -12,000 gallon and 1 -8000 gallon underground storage tanks. DRAINAGE BASINS & SUB-BASINS Two primary studies have been performed on Carter's Creek and its tributaries. The first is a study performed by the Federal Emergency Management Agency in July, 1992, titled E1.oo.d Insurance Study -Brazos County, Texas and Incorporated Areas. The purpose of this report was to investigate the existence and severity of flood hazards for Brazos County and to aid in the administration of the National Flood Insurance Act of 1968 and the Flood Disaster Protection Act of 1973. The second study is the Stormwater Management Plan, Phase III, performed by Walton and Associates -Consulting Engineers, Inc. contracted with the City of College Station in 1987. The purpose of this study was to gain knowledge of the existing and future drainage conditions in the City and to identify flood problems and flood prone areas. The subject tract was formerly a portion of the 3.81 acre Tract "F" of Ponderosa Place Section Two (hereafter referred to as Tract "F"), which has since been subdivided into Tracts Fl, /. F2, F3, & F4. A drainage analysis was performed and a drainage report prepared for Tract "F" V in regards to the construction of the Victoria Bank & Trust, College Station Branch which is now built and situated on Tract "F-1 ". The Tract "F" study provided a detention pond that was designed to attenuate enough peak runoff for the full development of Tract F (see Victoria Bank & Trust Drainage Report Dated September 13, 1993). Subsequently, runoff for the resubdivision Tracts F-1, F-2, F-3 & F-4 has been attenuated as well. Therefore, no detention is needed for Tract F-4. Exxon Express -Hwy 6 & Rock Prairie Road Drainage Report Page 2 The site is located on a ridge line dividing the Bee Creek drainage basin, Lick Creek drainage basin and the Foxfire Tributary to Carter's Creek drainage basin. The site itself mostly drains into the Foxfire Tributary's basin, thus the tributary · is the primary drainageway . Secondary drainageways include a series of culverts and open ditches along Highway 6 until the flow reaches the Foxfire Tributary. (See Appendix 1: "General Location Map"). The site is not within the 100 year flood plain according to the Flood Insurance Rate Map for College Station, Texas. (See Appendix 2: "Flood Plain Map"). Almost all off-site runoff is intercepted by two fackties. The first being the curb and · gutter system along Rock Prairie Road which leads into two curb inlets that discharge into the right-of-way of Highway 6, runoff then proceeds down an open ditch until it reaches Lick Creek. The second is an open ditch that runs parallel to the east line of Tract "F-1" and discharges into the detention pond on Tract "F-2" which is metered out into the Highway 6 right-of-way and proceeds to the Foxfire Tributary. Currently, the majority of the runoff from the subject tract sheet flows into the gutters along Highway 6 frontage road, proceeds to an open ditch, and then ultimately into the Foxfire Tributary. A portion of the tract sheet flows into the curb and gutter systems along Rock Prairie Road, then follows the discharge pattern that flows into Lick Creek as mentioned earlier (See Appendix 5: "Hydrologic Calculations -Rational Method). ·DRAINAGE DESIGN CRITERIA/FACILITY DESIGN Because of the detention requirements for Tract "F" have been met, no detention for Tract "F-4" is required. In the previous study performed by Kling Engineering, Tract "F" was divided into Drainage Area #1 and Drainage Area #2. DA #1 is captured by the detention pond and DA #2, which contains Tract "F-4", bypasses the pond. (Reference Appendix 3 of the Victoria Bank & Trust Drainage Report Dated September 13, 1993). To show that the detention requirements for Tract "F" have been met, the design storm for the 25 year return period will be used, even though the 10 year and 100 year storm were also investigated. The Rational Method was used to calculate peak runoff. A runoff coefficient of 0 .35 was used for pre-development conditions while a runoff coefficient of 0.90 was used for post-development and impervious areas and 0.35 for post-development landscaped areas. This yielded a pre-development runoff of Q25 = 13.18 cfs. The detention pond outlet peak flow is 4.00 cfs for the 25 year storm, leaving 13.18 cfs -4.00 cfs = 9.18 cfs of allowable direct runoff from the site. The development site for Tract "F-4" can be divided into five drainage areas: Drainage Area #1 flows into the detention pond while Drainage Area #2, #3, #4, and #5 contribute to direct runoff (See Appendix 4: "Drainage Area Map"). The collective runoff of DA #2, DA #3, DA #4, and DA #5 for the 25 year storm is 6.31 cfs which is substantially less than the 9.18 cfs allowable. Therefore, the detention requirements are in compliance with city ordinances. The results for all the storm events are tabulated below: Exxon Express -Hwy 6 & Rock Prairie Road Drainage Report Page 3 Storm return period 10 25 100 Pre-Dev. Q Tract F (cfs) 11.54 ~ 13.18 / 15.56 ./ Det Pond outfloJ (cfs) 3.84 4.00 ~ 4.82 Allowable direct runoff 7.70 / 9.18 10.74 / Post-Dev Tract 11 F-4 11 (cfs) (sum~ #2,,.DA #4) 5.53 . 6.31 ~ 7.44 Most drainage will be sheet flow, curb and gutter, and open channel flow. The site will have three concrete flumes, two of which discharge at the right-of-way of Highway 6 and one that discharges into the . gutter of Rock Prairie Road. DA #1 has a Q25 of 3.64 cfs that discharges through the proposed driveway into the detention pond. DA #2 has a Q25 of 2. 13 cfs that discharges through the proposed Highway 6 entrance into the Highway 6 frontage road curb and gutter system and ultimately into the Foxfire Tributary. DA #3 has a Q25 of 1.29 cfs that discharges through a concrete flume onto Highway 6 frontage and ultimately into the Foxfire Tributary. DA #4 has a Q25 of 2.38 cfs that discharges through a concrete flume into the curb and gutter system on Rock Prairie Road and ultimately into Lick Creek. DA #5 has a Q25 of 0.51 cfs that discharges through a concrete flume onto the Highway 6 frontage road and ultimately into the Foxfire Tributary. CONCLUSIONS A detention pond for Tract 11 F 11 of Ponderosa Place Section Two has been designed to attenuate runoff for the full development of the tract. Tract 11 F-4 11 Resubdivision of Ponderosa Place Section Two is a subsidiary of Tract 11 F 11 mentioned above. The sum of the peak outflow of the detention pond and the direct runoff from Tract 11 F-4 11 is substantially less than the pre-developed runoff for Tract 11 F 11 • Therefore detention is not required for Tract 11 F-4 11 and no impact to upstream or downstream landowners is expected. 11 1 hereby certify that this report (plan) for the drainage design of Exxon Express -Hwy 6 & Rock Prairie Road was prepared by me (or under my supervision) in accordance with the provisions of the City of College Station Drainage Policy and Design Standards for the owners thereof. 11 Exxon Express -Hwy 6 & Rock Prairie Road Drainage Report Page 4 REFERENCES Stormwater Management Plan, Phase II: Drainage Policy and Design Standards, City of College Station, Ordinance No. 1728 , prepared by: Walton & Associates, October, 1987 . Stormwater Management Plan, Phase III: Drainage System Analysis, City o f College Station , prepared by: Walton & Associates, August, 1986. APPENDICES 1) General Location Map 2) Flood Plain Map -Community No. 480083 , Panel No. 0182 Effective Date: July 2 , 1992 3) Resubdivision Plat of Ponderosa Place Section II, Tract F 4) Drainage Area Map I Grading Plan -Prepared· by Kling Engineering & Surveying 5) Hydrologic Calculations -Rational Method kes95 -01 b :\exxon .rpt '7/-:' 'J 6 ""yz? ~ 0 / / '7 -:I t l //,>/ / II -// -~ 0 0 3: m ~ 666 ';\ ... I\) I\) c:,) c:,) c:,) (,) ...., ...., O> (J1 I i I I Nl'v_. 888 u>en en en :c::i:::c:c mm mm mmm cri cri cri d I I I I .,, (J1 (J1 (J1 F 8 8 '5 mee d :0 )> )> :0 :0 mmm en en en Cl) Cl) Cl) WWW a: a: << 0 :::> :::> a: JOO~ en rn ....1 ll)lt> L() u: ch t<_ I " -::;t.. ~ Cl) Cl) Cl) I-I-I-WWW WWW ::c: ::c: ::c: ::c: Cl) Cl) Cl) Cl) ( 888 ..... f.\I C\I I I I I L() U) ............ (') (') (') (') dr1t.11'1.:t.qt' C\I C\I ..... 999 (') (') (') ,/ ..... ( "' :IE 0 0 llO :=. i .;, 1 :-./~-' ti-t ; 9. !(, ..:..,/4 ... 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('.~'>(o.o +) + 0 .'10(0.13) -o. o.77 0.17 A,~ 0 .1 2.. c D .??{~·t"L ) +-0 .9 c(O .'Z."L J A -L· ,-1 ,, A .... r -'-t.... . c. 71 ) (?. ?<,, + ---- ) ( Gw. -<" l'I cr, J Ji . -C>.c '> ,,..,, - O ."?>S (_c .1..'-z.) -+ D .9 O ( O · O S ) t-;;. ------ 0 c 7 " -.• 03 /06 /95 1 2 :08 'B409 846 8252 KLI NG EN GR KLING ENGINEERING & SURVEYING T E L E C 0 P I E R C 0 V E R S H .E E T tEF:fuco11erl Please deliver the following pages to: Name :,_B_..;._. ,,_-=~IJ-..;.__W!v--=-=Cv;.....;;...;;!~(rslf'-h/----=.....;u~~~~,'" a::;.i..c..0 ,_~___.__.,..,:;.+:-~=:......--- Firm : _ __.._~-k--i.....,'<s~-=J-+------"e,,'""-s _____________ _ Fax Number: ________________________ _ urveying ve., Suite 212 Bryan, Texas 77802 Phone: (4091846-6212 Fax : (409)846-8252 We are transmitting 3 page(s), including this cover letter from our fax number listed above. If any pages are missing or incomplete, please contact sender . 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MEMO Consulting Engineers • L and Surveyors Telephone 409/8 46-6212 Fax 409/846-8252 March 10, 1995 TO: Veronica Morgan FROM: City of College Stat(\ /, ;J /) Danny Miller AJ ~ ~ Exxon RE: Post Office Box 4234 Bryan, Texas 77805 Attached is a rev ised grading plan for Exxon Express located at the intersect ion of Rock Prairie Rd. and Hwy 6. The revision consists of a 12" PVC storm sewer beginn i ng with a slotted vane drain spanning the width of the driveway to intercept the flow from DA-2 as shown in the original report . The quantity of runoff is 0 25 = 2.13 cfs. Included is the manufacturer's specs on the slotted drain. The storm sewer then proceeds south with two grate inlets capturing DA-3 and DA-5 with quantities of runoff of 0 25 = 1.29 cfs and 0.51 cfs respectively. The storm sewer will then be tied into the existing curb inlet box located at the intersection. The total contribution to the existing box is 3.93 cfs. This is flow that previously drained into the Foxfire Tributary Basin and will now drain into the Lick Creek Basin . It is my understanding that this was TxDOT's preference . If you have any questions, please call. K LITNG E GHNE E R ING & §U RVEYHNG 4 103 Texas Avenue, Suite 212 Bryan , Texas 77802 B.}. Kling, P .E., R.P.L.S . S.M . Kling, R.P.L.S . MEMO C onsulting Engine ers • Land Sur veyors Telephone 409/846-621 2 Fax 409/846-8252 March TO, 1995 TO : Veronica Morgan FROM: City of College StaI)i n /, /) /} Danny Miller ~ q-a Exxon RE: Post Office Box 4 2 34 Bryan, Texas 77805 Attached is a revised grading plan for Exxon Express located at the intersection of Rock Prairie Rd. and Hwy 6. The revision consists of a 12" PVC storm sewer beginning with a slotted vane drain spanning the width of the driveway to intercept the flow from DA-2 as shown in the original report. The quantity of runoff is 0 25 = 2.13 cfs. Included is the manufacturer's specs on the slotted drain. The storm sewer then proceeds south with two grate inlets capturing DA-3 and DA-5 with quantities of runoff of 0 25 = 1.29 cfs and 0.51 cfs respect ively. The storm sewer will then be tied into the existing curb inlet box located at the intersection. The total contribution to the existing box is 3.93 cfs. This is flow that previously drained into the Foxfire Tributary Basin and will now drain into the Lick Creek Basin. It is my understanding that this was TxDOT's preference. If you have any questions, please call. R-3599-A Slotted Vane Drain NEENAH's Cast Iron Slotted Vane Drain offers ease of installation along with the superior vaned configuration to capture previously unexpected quantities of water when placed perpendicular to the flow. Installation is accomplished by sawing a slot in the top of conventional PVC pipe, placing the pipe on grade, installing the Cast Iron Slotted Vane Drain in place and pouring the concrete . Drain is pedestrian and bicycle safe and can be used with confidence in urban areas. When used in conjunction with a vane grate inlet, virtually all of the water in the street which would normally bypass the catch basin can be captured, thus increasing the space between inlets . An additional benefit is the added safety factor obtained should the catch basin be plugged or covered with snow. The unit may also be installed at entrances and exits of parking areas to capture sheet flow before it enters a commercial street. Feel free to contact our field personnel or our Product Engineering Dept. at Neenah for further detailed information. (4) 1/2" DIA. CORED HOl.LS DRAIN S BOLT TOCElHER On longitudinal slopes of 096 to 696, this unit captures approximately 0 .5 cubic feet per second, per lineal foot. (4) 1/2" DIA. COR ED HOLES F"OR B~. ilNC TOCCTH£R DRAINS NEENAH FOUNDRY COMPANY SECTION lliRU VANE DRAIN WIRE DRAIN TO P1P£ PAVEMENT e• MIN . CONatE1t ntac:NCSS AT SIDCS ANO BOTTOM Of S['ll[R PIP[ FASTEN CASTINC SEQJREL Y TO PIP£ •TH 'llllR£ kOCKS TO AO.A.IST ~ TO GRAOC ANO A$SURC e• Wiit. COHCJt[T( TMO<NESS 80€AlH PIP{ R-3599-A Slotted Vane Drain NEENAH's Cost Iron Slotted Vane Drain offers ease of installation along with the superior vaned configuration to capture previously unexpected quantities of water when placed perpendicular to the flow. Installation is accomplished by sowing a slot in the top of conventional PVC pipe, placing the pipe on grade, installing the Cast Iron Slotted Vane Drain in place and pouring the concrete. Drain is pedestrian and bicycle safe and can be used with confidence in urban areas. When used in conjunction with a vane grate inlet, virtually all of the water in the street which would normally bypass the catch basin con be captured, thus increasing the space between inlets. An additional benefit is the added safety factor obtained should the catch basin be plugged or covered with snow. The unit may also be installed at entrances and exits of parking areas to capture sheet flow before it enters a commercial street. Feel free to contact our field personnel or our Product Engineering Dept. at Neenah for further detailed information. (4) 1/2° DI._ CORED HOLES DRA INS BOL T TOGE THER On longitudinal slopes of 096 to 696, this unit captures approximately 0.5 cubic feet per second, per lineal foot. (4) 1/2° DI._ CORED HOUS fOR Bat TINC TOG[THER OIWN S NEENAH FOUNDRY COMPANY I"" ,, •. lt!,2 ~;:.-RAD. j ~r-----...l """ORMN TO P1P£ SECTION THRU VANE DRAIN 1~· CU .. SDR-M PYC SOICR PIPE kOOC:S TO AO..llST PPE TO CftAO[ AHO AsstM[ e• ....._ CONCR£T'[ MOC NC SS BDIEA TH PIP£ P>\VEMENT e• MIN . CONCR(TE THIOCNESS AT 90£5 AHO BOTTOM aF SEWER PIPE ----------------------