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HomeMy WebLinkAbout77 Development Permit 541 Sherwin Williams/ £ DRAINAGE ANALYSIS FOR PROPOSED COMMERCIAL DEVELOPMENT SHERWIN-WILLIAMS PAINT STORE 3110 TEXAS AVENUE SOUTH COLLEGE STATION, BRAZOS COUNTY, TEXAS FEBRUARY, 1998 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. _,,,,,,, If"~~, ;~.:r._ ... _ ......... ..e.I l MICHAEL G. HES1EA 1 \~\';"691o~Jt '•(<'; .. ~~.~~ ''(S10NA \.. tt-• ~'~~~ Engineer No. 69104 P.t,, P.E. '2·4 '~e, SHERWIN WILLIAMS PAINT STORE -DRAINAGE ANALYSIS -CERTIFICATION DRAINAGE ANALYSIS SHERWIN-WILLIAMS PAINT STORE COLLEGE STATION, BRAZOS COUNTY, TEXAS FEBRUARY 4, 1998 INTRODUCTION: The proposed site is located at 3110 Texas Avenue South. The legal description is Southwood Valley Section 3, Block 16 Lots 19 and 18B and is 0.30 acres. The proposed improvements include a 4900 square foot one story building, parking and the associated infrastructure. The latest Flood Insurance Rate Maps (48041C0182C) shows that no portion of the tract is in the regulatory 100-year flood plain. The site is zoned commercial C-1 and is being developed by Jim H. Woods, P.O.Box 10220, College Station, Texas 77842. EXISTING STORM DRAINAGE: Storm water leaves the site in two directions and into concrete driveways. The proposed development is approximately 550 feet from, and discharges into Bee Creek Tributary "A" approximately 200 feet west of Texas Avenue. The designation for this creek is Drainage Basin No. 4, Regulatory Channel Reach No. II and is a primary channel. The Ultimate Condition Discharge for the 100 year storm at Texas Avenue is 3996 cfs, reference "Stormwater Management Plan for the City of College Station Drainage System Analysis", Table III-6, page 31. PROPOSED STORM DRAINAGE: Storm water runoff for the site, both pre and post- development drain into existing concrete driveways which carry the storm runoff to Bee Creek. Predevelopment: QlOO = 0.3 * 11.64 in/hr. * 0.3 acres Post Developme .nt: QlOO = 0.6 * 11.64 in/hr. * 0.3 acres Increase in runoff: 2.09 cfs -1.05 cfs 1.04 cfs 1. 05 cf s 2.09 cfs Analyzes were elevations increased owners. prepared to determine enough to impact down if water surface stream property The first analysis evaluated the entire 5.38 acre watershed with the point of interest being the watershed's confluence with Bee Creek. Below is a table showing a summary of the results before and after the proposed site development. DRAINAGE ANALYSIS · SHERWIN·WILLIAMS PAINT STORE· PAGE 1 OF 2 PAGES ENTIRE WATERSHED WATER SURFACE ELEVATION CHANGE PREDEVELOPMENT ACRES RUNOFF QlOO WATER SURFACE CONDITIONS COEFF. cf s ELEVATION 5.08 0.60 36.32 259.69 0.30 0.30 POST DEVELOP. 5.38 0.60 37.57 259.72 CONDITIONS CHANGE IN WATER SURFACE ELEVATION = 259.72 -259.69 = 0.03 FEET The second analysis was ran to determine the increase in the water surface elevation of the concrete driveways. DRIVEWAY WATER SURFACE ELEVATION CHANGE PREDEVELOPMENT CONDITIONS POST DEVELOPMENT CONDITIONS ACRES 0.30 0.30 RUNOFF QlOO 1/2 Q WATER SURFACE COEFF. cfs * CHANGE (FT.) 0.30 1. 05 0.53 0.11 0.60 2.09 1. 05 0.14 CHANGE IN WATER SURFACE ELEVATION= 0.14 -0.11 = 0.03 FEET *Approximately 1/2 of the runoff goes to the front and 1/2 goes to the rear of the site and into concrete drives. With a Bee Creek QlOO of of 3997 cfs adding another 1.04 cf s will not significantly increase the water surface elevation of Bee Creek. The table's show that the additional flow generated by the proposed improvements will not change the water surf ace elevation dramatically and therefore, detention is not required nor planned for the site. CONCLUSION: This project is in compliance with the City's Stormwater Design Standards. DRAINAGE ANALYSIS -SHERWIN-WILLIAMS PAINT STORE -PAGE 2 OF 2 PAGES w ~ f- (j) ~ [}={] ~~\'!MD [NJ= \'!MD [L [L D ~[Ml]~ CP&D[N]u ~u(Q)~~ ~U U@ LJ~~~© ~ '\il~o ©©o COLLEGE STATION, BRAZO S COUNTY, TX WATER SURFACE DETERMINATION Rating Table for Triangular Channel Project Description Project File c:\haestad\fmw\husfeld.fm2 Worksheet ACCESS DRIVEWAY Flow Element Triangular Channel Method Manning's Formula Solve For Channel Depth Constant Data Mannings Coefficient Channel Slope Left Side Slope Right Side Slope Input Data Minimum Discharge 0.53 Rating Table 0.013 0.011000 ft/ft 24 .000000 H : V 24 .000000 H : V Maximum 1.05 Discharge Depth Velocity (cfs) (ft) (ft/s) 0.53 0.11 1.76 1.05 0.14 2.08 Increment 0.52 cfs 02/03/98 04 :02 :33 PM Haestad Methods , Inc . 37 Brookside Road Waterbury , CT 06708 (203) 755-1666 FlowMaster v5 .13 Page 1 of 1 WATER SURFACE DETERMINATION Rating Table for Irregular Channel Project Description Project File c :\haestad\fmw\husfeld.fm2 Worksheet OUTFALL AT BEE CREEK Flow Element Irregular Channel Method Manning's Formula Solve For Water Elevation Constant Data Channel Slope 0.010000 ft/ft Input Data Minimum Maximum Increment Discharge 36 .32 37 .57 1.25 ds Rating Table Water Surface Discharge Wtd . Mannings Elevation Velocity (cfs) Coefficient (ft) (ft/s) 36.32 0.025 259.69 5.06 37.57 0.025 259.72 5.11 02/03 /98 04:00 :02 PM Haestad Methods , Inc. 37 Brookside Road Waterbury , CT 06708 (203) 755-1666 FlowMaster v5 .13 Page 1 of 1 DEVELOPMENT PERMIT PERMIT NO . 541 SHERWIN WILLIAMS FOR AREAS OUTSIDE THE SPECIAL FLOOD HAZARD AREA RE : CHAPTER 13 OF THE COLLEGE STATION CITY CODE SITE LEGAL DESCRIPTION: Lot 19 & 18B , Block 16 , Southwood Valley Section 3 OWNER: Rick Wood Box 10220 College Station, Texas 77842 693-1617 DRAINAGE BASIN: Bee Creek Trib. A -Segment I TYPE OF DEVELOPMENT: SITE ADDRESS: 3108 Texas Ave. S. This permit is valid for site clearing and rough grading ONLY. 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 . This permit, being temporary, is valid only within sixty (60) days of the date shown below, and is not intended to allow the complete development of the site as proposed . Any work performed after the expiration of this permit is not covered, and is considered unauthorized. 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 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 e City College Station that apply . Date Date -z.. /10 (9B Contractor Date I DEVELOPMENT PERMIT PERMIT NO . 541-A SHERWIN WILLIAMS FOR AREAS OUTSIDE THE SPECIAL FLOOD HAZARD AREA RE: CHAPTER 13 OF THE COLLEGE ST A TION CITY CODE SITE LEGAL DESCRIPTION: Lot 19 & 18B , Block 16 , Southwood Valley Section 3 OWNER: Rick Wood Box 10220 College Station, Texas 77842 69 3-1617 DRAINAGE BASIN: Bee Creek Trib . A -Segment I TYPE OF DEVELOPMENT: SITE ADDRESS: 3108 Texas Ave. S. This permit is valid for site construction as shown upon the approved 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 de velopment of an area 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 the Ci of ollege Station that appl y. Date I 7 ~ Contractor Date Or·a-inagc Oevelop1ncn t Penni t Issuance Checklist $I 00 00 Fee Paid Application Compl ete/Si g n ed Erosion Control Plan (submitted & approved) If S ite > 5 Acre s I s N 0 I Submitted Drainage Report/Letter (submitted & approved) $3UO Fee Paid -For Subdiv1 s10 11 Inspection (if applicable) "The above c h ecklist mu st be complete prio r to issuing a full drain;age permit on a riro_1ect. To issue a partial penrnt for clearing and grading only , all ite m s minus the dra111ag e report m u st be complete . Please initi a l in each box if y ou check off any of these item s" Figure XU Development Permit City of Coll ege Station, Texas i -.,.,.... / q l, l ~ ts Site Legal Description : L--0'V tsUJctc::._ '~ ~~ VA-Wfuy ~. ~ Address : ~K 10-Z.'LO ~S '1rz..,( ll<dc(-z_ Telephone: (¢fj"3-I b 11 ' . R\'O<-wOO\'> Site Owner:~ttv·v~ ~. vJoo{)f Ar c hite ct/ f.2 /\ n,..,. . ~~11i<L Address :-----------:;,-------- E ng in ee r : I~~ Telephon e N o: J]t:::?= SS-<fo C on tra ctor ~Gr&£~~ess: (boK 10?_60 Cs, 779Jcfi_ Telephone No : 0J}3 -t 6( 1 Dat e Application Filed : _______ _ Approved : ___________ _ Appl ication is hereby made for the following development specific waterway alterations : 0 Application Fee 0 Signed Certifications 0 Drainage and erosion control plan, with supporting Drainage Report two (2) copies each. 0 Site and Construction Plans, with supporting Drainage Report two (2) copies each . 0 Other: AC KNOWLEDGMENTS : , des ign engineer/owner, hereby acknowledge or affirm tha t : Th e information and conclusions contain ed in the above plans and supporting documents comply with the current require ments of the City of College Station, Texas City Code, Chapter 13 and its as so ciated Drainage Policy and Design Standards . As a condition of approval of this permit application, I agree to construct the improvements proposed in this application according to these documents and the requirements of Chapter 13 o f the College Station City Code. ~~ Property Owner(s) Contractor Figure XH Continued CERTCFrCATIONS : (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 100 year storm . Engin ee r Date B . l , certify that the finished floo r elevation of the lowest floor , including any baseme nt , of any residenti al structure, proposed as part of this application is at or above the base flood e levation establish ed in the latest Fed eral Insurance Admini stration Flood Hazard Study and maps, as amended . Engineer Date C l, certify that the alterations or development covered by this permit shall not dimini sh the flood-carry ing 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, Chapte r 13 concerning encroachments of flood ways and of flood wa y fringes . Engineer Date I, do certify that the proposed alterations do not raise the level ._.> of the 100 year flood above elevation establi shed in the latest Federal Insurance Administration Flood Hazard Study. Engineer Date Cond itions or comments as part of approva l: ------------------- 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. AH 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 . .. Figure Xll Development Permit City of College Station, Texas Site Legal Description~()JU<.:>L:&XJ? \ku-41 Ser ~ r ~l b I Lars lei 2t-( b B Sit e O w ner: SHmw~~ -L.,l W tJ!1f'~ Address : ------------ Telephone : Archi te cl/ ~ ~ { En g in e e r :O-•P • Co ntrac tor : ------------- D at e Application Filed : '2-Li.-4[b i~-11-~____,...~-;rw-wz-=--.l~~ ~--.~---Z-8-~ -B Address : C4::,£~ 3fztTZS-v-T?< Telephon e No :~j~ ,_(I CO Addres s ------------- Te 1 e phone No : ---------- Approved : ------------ Application is hereby made for the following development specific waterway alterations : ,...~ 0 Application Fee ---9 Signed Certifica tions -Q Drainage and erosion control plan , with supporting Drainage Report two (2) copies each. 0 Site and Construction Plans, with supporting Drainag e Report two (2) copies each. 0 Other: ------------------------------ ACKNOWLEDGMENTS : I, t1t~YML-G • &s1~ Re., d esig n e ngineer/owne r, hereby acknowled g e or affirm that : I Th e information and conclusions contain e d in the abov~ supporting documents comply w it h the current require ments of the City of College Station, Texas City Code, Chapter 13 and its a ssociated Drainage Po licy and Design St a ndards . 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