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Home My WebLink About15 Development Permit 298 Cellular Onef I RONNFELDT ENGINEERING CONSULTANTS, INC. 4438 Centerview, Suite 311 San Antonio, Texas 78228-1430 (210) 734-8755 DRAINAGE STUDY CELLULAR ONE NEW CELL SITE -S. COLLEGE STATION ARRINGTON ROAD August 26, 1995 This drainage analysis follows the procedures as outlined in the "Drainage Policy and Design Standards" which are contained in the "Stormwater Management Plan for the City of College Station". The subject property is located Southeast of the City of College Station near the intersection of Highway 6 and Green Prairie Road. The property is more precisely located on the West side of Arrington Road, approximately 1560 feet from the intersection of Arrington Road and Green Prairie Road. The subject property is in the Alum Creek watershed. Runoff from the property flows from the site, to the South, along Arrington Road to a point approximately 3,500 feet from the intersection of Arrington Road and Green Prairie Road. At this point the runoff flows under Arrington Road through a culvert. The runoff the follows a series of small tributaries until in flows into Alum Creek at a point West of Highway 6. This area lies in College Station Basin Reference No 10. The runoff area, which includes the subject property, is outlined with a heavy black dashed line on the attached "Drainage Map. This map ;has been copied from the contour map obtained from the City of College Station. For purposes of this drainage report the subject area has been reduced in size to a 1" = 200" scale, The runoff area encompasses approximately 4.77 acres and includes the entire project site. (Planimeter reading= 312/60 = 5.2 in. sq. 5.2 x 200 x 200/43560 = 4.77 acres) The "Rational Method" has been used to calculate the volume of runoff from the drainage area. For this study the area is considered to be natural grassland. The slope of the drainage area is approximately: 12/1000 = 1.20% The runoff velocity is obtained from Table III-2, page 24, for natural grasslands, O -3%. V =Oto 2.5 '/sec. 1.2/3 = 0.4 , 0.4 x 2.5 = 1.0; use V = 1.0'/sec. The time of concentration calculates as follows: 1000/lx60 = 16. 66 minutes. From figure III-1, "Intensity Duration Frequency Curves for the City of College Station, I 25 = 7.7 CFS. ... Drainage Report Cellular One, College Station Page 2 -•.. '*" August 26, 1995 From Table III-1, page 23, the runoff coefficient for natural grasslands, 1 to 3.5% slope, = 0.35 to 0.45. Slope = 1.2%, 0.2 x 0.1 = 0.02. For 1.20% use C = 0.02 + .35 = 0.37. Using these figures to calculate the runoff: Q = CIA 0 25 = 0.37 x 7.7 x 4.77 = 13.59 cfs Assume that the velocity through a culvert would be 6 '/sec. The area required for a culvert pipe ( 0 100 ) would be 13. 59 /6 = 2. 26 ft 2· The area of a 21" CMPA is 2. 20 ft2 • Due to the assumptions made to complete this analysis, the safety factors built into the figures used and the inherent inaccuracies of the rational method, as the area of the 21" CMPA is very close to the calculated requirement, I would consider that a 21" CMPA would be adequate to accommodate the runoff volume from a 25 year frequency rain storm. I would recommend the installation of one, 21" CMPA pipe to accommodate the drainage. ,,,,,,, --E. OF r~ \\ Ap.~·········~1i '• END OF REPORT ;~: ... * ·· .. oS' • "" .• •·• I "'*... ·.* ,, , . . * ~~ : •••••••••••••• ••••·••·••· ! ..• l ROY J. RON FE ~···~············· . ... . ·. . / l-o' ~ . ~ lj ~·~ I -' t{, ~~to ' A ~-t " rr .. ~,, ~'"-11 (9 t.6, . ·~ ' . DRAINAGE MAP CELLULAR ONE S. COLLEGE STATION CELL SITE SCALE: 1" -200' ------ · ... E RONNFELDT ENGINEERING CONSULTANTS, INC. 4438 Centerview, Suite 311 San Antonio, Texas 78228-1430 (210) 734-8755 DRAINAGE INSTALLATION DETAILS CELLULAR ONE NEW CELL SITE -S. COLLEGE STATION ARRINGTON ROAD September 5, 1995 These "Drainage Installation Details" are to be considered a part of the plans and specifications and other "Construction Documents", for the construction of the "Cellular One South College Station New Cell Site". The drainage study for this project, submitted to the City of College Station on August 26, 1995, indicated that the stormwater flows along Arrington Road at the S. College Cellular One Cell site will require the installation of one 21" Corrugated Metal Arch Pipe. This pipe has a rise of 16 inches and a span of 25 inches. This pipe is to be installed with an upstream invert elevation of 311.2 and a downstream invert elevation of 311.0. These invert elevations are based on the elevations developed in a survey conducted on May 8, 1995 by Paul A. Wilkinson, RPLS, Northstar Land Surveying, and shown on the survey plan developed for this survey. End Treatment" which is to be "Slope Details for Sideroad OF INSTALLATION DETAILS -0 ~ ,. • #3 Bar It " - ESTIMATED QUANTITIES PPE . ''o" "t' SIZES 18'' ·3 1:-6" 12' 24" 4'-0" 15 1 3011 4'-6" 18 1 2-30" s'-s'' . ,8 .. RPRAP C.Y. 0.5 0 .7 0 .9 1.4· Wire Mesh Relnt '. l Pipe . The Contractor wtlbe permitted to 'substitute Cl . 8" cone. rtprap In place of pipe from the . Junction of the center of plpe_wlth the 6=1 slope . tind the flowltne grade of the pipe. Rlprop , used In Heu of pipe wftl not be IOcluded In the pay quantity for rlprop, but wllbe considered subsidiary to other bid Items. Quontltles shown ore for one end onlr. QfJ shown does not Include rfprap footing. Footlnos, when reqW-edi wll! be consider ad subsidiary to otner bid Items. .... : . ____ __=:S==:L=::OP=:E=::DE=:T:=A=ILS ,_IR SIDEROAO CULVERTS I .. DEVELOPMENT PERMIT PERMIT NO . #298B FOR AREAS OUTSIDE THE SPECIAL FLOOD HAZARD AREA RE : CHAPTER 13 OF THE COLLEGE STATION CITY CODE SITE LEGAL DESCRIPTION: A 0 .147-acre tract of land out of a 24 .97-acre tract out of the Augustus Babille Survey, Abstract No.75 , Vol 1850 , Pg 248 . SITE ADDRESS: Street Address -info unavailable OWNER: J. L. Gaut; Cellular One 13238 Rain Lily Lane Houston, Texas 77083 DRAINAGE BASIN: Alum Creek TYPE OF DEVELOPMENT: This permit is valid for site grading, culvert construction and all site work associated with the building permit. The culvert shall be constructed of a 21" corrugated metal arch pipe with an upstream invert elevation of 3 11 . 2' and a downstream invert elevation of 311 . O'. All disturbed areas must be final graded and seeded upon completion . 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 outside the special flood hazard area. All development shall be in accordance with the plans and specifications mitted to and approved by the City Engineer in the development permit application for h above named project and all of the codes and ordinances of the City of College Station t . t apply . Date Owner Date Contractor Date FROM 9. 6. 1995 8: 3 I p. 1 ---·~------------_..'-'I' ................................ ----------------~ Poll·ll '" oraM Fax Transmittal Memo 1s12 No, or PtQ•• -z,.. Tnl11y~ 0Rle 1-~ -<f' ~· ~ 1) e. rt? Pl/ & a_ MG' r 1 a_, J/7 From R' t< c7 h fl f c;;, I e}-r--Company C, / o.J. 7' t' ~ ~ / / 'f!!, 1 e!--?I~ i? P";( Compeny f(:, #Hf f!!!-/ cJ + J:Fff ~I ;f~4 Y /K 4 Location ~ C Lix:auon Dopl. Charge/ / ,._....,.~// t7 ~ >"'"V;c...e.~· Fax, /,) 7//J ;t/JO/ TclcJJ!1u11.;1L.I~ -,//J _7 Fui""")'_,.,., 7xJ.-LJ , ~ T•ltpllOnae _ tfc:>1-(J?'T -./-, /~ ,~r-1-rr.,,"1"-Jp/t::) ,,._ v·· ,,,,,,,-, 'fl~ Zla-7~4-~?:J'.,j Comments Or;g;n•.1. 0 Destroy 0 Return 0 Call for ~c.kuo 01spo,111on: ;;-If tor*~ -I>~ pr~v1el...,cl tL 7 yt;'u r-e:-f'ui:::..7fi=:-d, z-? ;Yt?w, .f/t:::--~d /71~re-/M -{-p//~&Lf-1'>( ~V-~dd~ f1~~1 cJ~'7/f Pf p.!~a-~ e C,a//. -;<>~ ~ R.Q~~F~LDT ENGIN~~RING CONSU~TA~T9-.1 ... JNC. 4438 Cenlerview, Suite 311 San Antonio, Texas 78228-1430 (210) 734-875S DRAINAGE INSTALLATION DETAILS CELLULAR ONE NEW CELL SITE -S. COLLEGE STATION ARRINGTON ROAD September S, 1995 These "Drainage Installation Details'' are to be considered a part of the plans and specif .icali.ons and other "Construction Documents", for the construction of the "Cellular Ont! South College Station New Cell Site". The drainage study for this project, submltted to the City of College St:ation on August 26, 1995, .i.ndicaled that the stormwater flows along Arrington Road at the S. College CelluldI. One Cell site will L-equire the installation of one 21" Corrugated Metal Arch Pipe. This pipe has a rise of 16 inches and a span of 25 inches. This pii.>e i:.::t to be installed with an upstream invt!~t elevation of 311.2 and a downstream invert elevation of 311.0. These invert elevations are based on the elevations developed in a survey conducted on Moy 8, 1995 by Paul A. Wilkinson, RPLS, Northst:a.r Land Surveying, and shown on the survey plan developed for this survey. The pipe installation is to include ••safety End Treatment" which is to be as shown on the attached detail entitled "Slope Details for Sideroad OF INSTALLATION DETAILS ! -I .. <O . n "' "' ·D . ' . -0 1C ( #3 Bar . " ESTIMATED QUANTITIES Pff ·'"o• "~' sru:s f8 .. . 3 •,.. 8" 12' 24" 4•-0• 15 1 30" 4'-6111 18' 2-30°1 e'-6'' . ·l8 .. RAUf' c. "t ().~ 0.7 0 .9 L4 . Wire Mtdt Rtlnt '. l PIH . n.e Con1rocMr "'.IN! pem111d io 'subeifh::lll • a 8" cone. rfptap rn .,ac.c• or pipe fN>ln '"'' . )lnctlon of the center of sil,e_...., lie 61 ~ .and the nowln• oracle of lht ~ .. R~ r ned h leu or pipe d * be .nctude d 111 the pQJ quantity for rlprap. bul • b• CCIII Pd ti' ed 91Jblld1crrr to G .... bid It••'- Q\Jonlltle' lhown an for ont end OlllJ 011-sha.,. doe. •elf Include rtrap fooUnv. Fo0Un91 1 "'-' requr~, will tie cCJRtidere d tubsldlary to Oft'l9' . Ud lterM . SLOPE DETAILS -,..,R SIDEROAD CULVERTS ----------~-===========-I + RECIPIENT'S COPY QUESTIONS? CALL 800-238 -5355 TOLL FREE. A/RB/LL PACKAGE TRACKING NUMBER 4151378103 q 1 5 1 3 7 B 1 0 3 q 15131 a 1~~,3, 5 I I 11 II 11 I II 11 I ~'!'our Phone Number (Very Important) To (Reci pient's Name) Please Print Ken.n.e t 1'L. -.Oonou.ghu.e Company Donoughve ~ AsiocJ te Street Address I Inc. \ lf C: E. Loop ~1 0 , Suite 60 City State ZIP Required S n Antonio TX 7f'21 (., YOUR INTERNAL BILLING REFERENCE INFORMATION (optional) (First 24 characters will appear on invoice.) (Check services required) I r Priority Overnight Standard Overnight Weekday Service i°""'""""'""""""""""''i I~\':,!.~"""""! 1 0HOLOATi ED LOCATIONWEEKOAY ,.,,., """""''· (Fill in Section H) 11 D ~J~k1G1NG 51 D ~J~k1G/NG EL/VER WEEKDAY . ~--··-····--·-----------_ _,;.. __________ -·-------- 16 ~FEDEXLITTER" 56 D FEDEXLITTER" Satu day Service 12 D FEDEXPAK" 52 D FEDEXPAK" 31 D HDLDATFEDEXLDCA~f;~;-4/.'!I!/l,AJi 13 D FEDEX BOX 53 D FEDEX Box 3 D p.~~v~~.~\~~~~!;-To I Total Recipient's Phone Number (Very Important) ( h.aQ l 7 64-~~1 n _ DepartmenURoor No. C it~ of ColleQ t tion PlannJng Div sloo Exact St reet Addre ss (We Cannot Deliver to P.O. Boxes or P.O. lip Codes.) 1 10 1 T xas Av e nu City f Total State ZIP Required tat ion TX 77fl 2 IF HOLD AT FEOEJ< LOCATION, Print FEOEJ< Address Here Street Address State ZIP Required Date Cash Received 0 Return Shipment 0 Third Party 0 Chg . To Del. 0 Chg. To Hold Street Addre ss City State Zip Federal Express Use Base Charges Declared Value Charge Other 1 Other2 ......,14=--=D~F_ED-=E_x_ru=-B_E-i-5=-4 ~D~F_E_OE....,X-=cc-UB_E-.,,.,; _ -~ _g _ ~~~!°~g~~~:u~ ----. lo • 11 -- 1 f-_._-'----------1 x I y~...;~!,,1 1~~:,~~':::,::='2J:t Special Handling DIM SHIPMENT (Chargeable Weight) !--D=-a-t-em=-1m-e-=R=-e-c-ei,-ve-d,.---::F,-ed-::E=-x-=E=-m-p..,.lo_y_e-e7N,-u-m,...be-r--1 Received By : Total Charges I 30 D ECONOMY" 46 D rPt;~R 4 D DANGEROUS GOODS (E<tra cha'9'1) D lbs. r *Economyletter Ratenotavadable D GOV'T D DRY /CE ~=~~~Y rate. 41 PACKAGE 6 Dangerous Goods Shipper's Declarat1on not required Freight Service (fOfp«kagfSOW!f 150/bs.) 70 D OVERNIGHT 80 D TWO -DAY FREIGHT•• FREIGHT •• (Conlirmedreseivalionrequired) t Oelrvery ronmtmenl may "Declared Value l..Jmd 5500. · ••. -••••• ''f'""IN..w.ll\IONcr.hAril1lft MULTIPLE PACKAGE SERVICE IF YOU ARE MAKING AN MPS SHIPMENT, APPLY THE SELF ADHESIVE MPS COPY HERE TERMS ANO CONDITIONS DEFINITIONS On this A1rbill, we, our and us refer to Federal Express Co rporation, its emp loyees and agents You and your refer to the sender, its employees and agents AGREEMENT TD TERMS By giving us your package to deliver, you agree to all the terms on this Airb1ll and in our current Service Guide. which is available on request. If there 1s a conflict between the current Service Guide and this Airbill, the Service Guide will control. No one is authori~ed to alter or modify the terms of our Agreement. RfSPDNSIBILI TY FOR PACKAGING AND COMPLETING A/RB/LL You are responsible for adequately packaging your goods and for properly· f1jhng o ut ths Airbill. Omission of the number of pac kages and weight per package from this Airbill will result in a billing based on our best estimate of the number of packages received f~om you and an estimated ·default• weight per package, as determined and periodically ad1usted by us. AIR TRANSPORTA TION TAX INCLUDED Our basic rate includes a federal tax required by Internal Revenue Code Section 4271 on the air transportation portion of this service LIMITATIONS ON DUR LIABILITY AND LIABILITIES NOT ASSUMED Our liability for loss or damage to your package is limited to your actual damages or $100, whichever is less, unless you pay for and declare_ a higher authorized value. We ~o not provide cargo habil1_ty insurance, but you may pay an additional char9e for each add1llonal $100 of declared value. If you declare a higher value and pay the additional charge, our liability will be the lesser of your declared value or the actual value of your package. In any event we will not be liable for any damages, whether direct, incidental, special or consequential in excess of the declared value of a shipment. whether or not Federal Express had knowledge that such damages might be incurred including, but not limited to, loss of income or profits. We won't be liable for your acts or omissions, including but not limited to improper or insufficient packing, securing, marking or addressing, or for the acts or omissions of the recipient or anyone else with an interest in the package. Also, we won't be liable, if you or the recipient violates any of the terms of our agreement. We won't be liable for loss of or damage to shipments of prohibited items. We won't be liable for loss, damage or delay caused by events we cannot control, including but not limited to acts of God, perils of the air, weather conditions, acts of public enemies, war. strikes, civil commotions, or acts or omissions of public authorities (including customs and quarantine officials) with actual or apparent authority. DECLARED VALUE LIMITS The highest declared value we allow lor FedEx Letter and FedEx Pak shipments 1.s $500. For other shipments, the highest declared value we allow 1s $50,000 unless your package contains items of "ex t ra~rdinary value," in which case_ the highest declared value we allow 1s $500. Items of "extraordinary value, include artwork, jewelJ'. furs, .precious metals, negotiable instruments, and other items hsted in our current Service Guide 11 you send more than one package on this Airbill, you may fill in the total declared value lor all packages. not to exceed the $100, $500 or $50.000 pe r package limit described above. (Example: 5 packages can have a total declared value ol up to $250,000.) for11 1~~0o~h~~~~~t~i~t~~ ifi~n~get~ ~~~h~c~J~~i 1 ~a?~! 1 ~tb i:~~ package(s) lost or damaged (not to exceed the lesser ol the total declared value or the per package limits described above). You have the responsibility of proving the actual loss or damage. FILING A CLAIM ALL CLAIMS MUST BE MADE BY YOU IN WRITING. You must notify us of your claim within strict time limits. See current Service Guide We'll consider your claim hied if you call and notify our Customer Service Department at 800-238-5355 and notify us in wntmg as soon as possible Within 90 days after _you notify_ us of your claim, you must send us all r~levant information a~out 1t. We are not obligated to act on any claim until you have paid all transportation charges, and you may not deduct the amount of your claim from those charges. 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See current Service Guide for fur ther information Part# t45412/145413 Rev. 4/94 + M-~~=i-JL.P.:llir-'~~....LX~i==,,.-~~~~~~~~-+-+-=--==::___i Of _~~~--==-=~-'-'-'-\..l-=--=-<-=::.-=='--~~~-=~~-+-+;c..:..:::..:..:.=:=----1 Phone# _A_RE_A_C~O-D~E=:.:~~N-U~M~B~ER~-""::..UELXT4.------=~~~.LJ.~RE~T~U~RNED---1 Message ---------------------+--+Y_O'-'U'-R'-C.;.;.AL---lL WILL CALL AGAIN CAME TO SEE YOU WANTS TO SEE YOU / n add, }ion .f.r:, f~ cw/ Cl/ I t:Z/-fP/1 s ~ ~/z/~ !'1!. ~~v/ fl_ vvf vt~+·J ' ~c 11ced fz> ~ a ?rre::.f --?~rar~f-c t77¥>? Ai 11-i~~ ln6/,."6s ?f/FA/~,,~e: ¥f,,zi ~ ;';,/;,--,,»¢f,>.,, TRANSMITIAL ft @~~~ fr;X :N~R ~~~ 4.'J N."E. Loop 410, Suite 760 S<HJ An I on i o, 'l'Px<1s 7H/.1 o (210) 349-5184 PROJECT: Soulb CollegP SlcdiotJ Cell Sih-~ for Ce 11 ular One AIWH I Tr;CT' S PJm.JECT NO. 4.'i44 D.ilP: A11gusl H, 199:-i TO: Ms. Veronica MorgHn CITY OF COLLEGE STATION PLA 1 Nl C DIVISION P. 0. Box 9960 1101 Texas Avenue College Station, TX 77842-0960 WE TRANSMIT: [X] herewith [ ] hand delivered [ ] pick up [X] Fed. E~p. [ ] in accordance with your request [ ] Ullder separatP. cover· FOR YOUR: [ ] approval [ ] use- [ ] distribution lo parties [X] infon1111 I i 011 [ ] retnrn THE FOLLOWING ITEMS: Copies Date u. Descrip1ion 1 08/08/95 Th~ve] o pmen l Penni l., Soulh Col lc .. ge SI nU 011 Cell Sile _J Action Code: A. I _J I _I Action indicaled on iletn t rausud LLPd o Aclion required For Sig1rnlure nnd return to this office Acl i cm Coclr> B. c. D. E. For Signature & Forwarding els nol Pd below umfer REMAPKS See REMARKS below REMARKS: FOR PERMIT COPIES TO: (with I enclosures) Architect's file B. Law [X] I [ ] [ ] [ ] J UL 19 '95 1 1 : 07AM CO t'ITE MPORAR 'r' CONS T RUCTORS I NC P.3/4 Figure XII Development Per'mit City of College Station, Texas SiteLegalDescription: A t).141 Aeu.fUt1"•t=LWr> tJuroF A ~4.17 Attte f~#tA("fC ..-U.Ei A.u~i.a~TCAS P.,~ $1 u.a S'c.e,_,tt"f, A.4.sta. Do -tr, Vo&. •&"So,'"' "2.46 Site Owner: J. L · t'i .. I.AT Address : 13 Z.~6 ~,,., t., 4t lAu•, IJ'"n"otJ,TJt 11oa 3 Telephone: ( 1 f ~) "40 • 4-tt 4 Architect/ EngiAoer: J:::b~oM41h1~ '~SSDGtl.-'f~, IJG. Address : 45' N.E. ~ 4-io a ~uf'•7,_o, .,.~.fx.1&21'. Telephone No: ('Z10) 34Cf -~•~64~- Contractor :~~.rrl!.tM~~ &1Jt1utI1tis,~c. Address : 14' U£1M1.t1.., S'1.ura 4b1, '>.A.,TK. 7&'2.S~ Telephone No :(Zao') 4q(,-tc.tU Date Application Filed: ~-!> ... 'tG" Approved: ----------- Application is hereby made for the following development specific waterway alterations: At>r.)t~101J ~f A 15" 4 ~u.-A.'flO ~et'.A.l.. c::=:11t..ye.r;r= ~ c;1re:. ~$ J?l2"""N?..____ ___ _ 0 a 0 0 0 Application Fee Signed Certificatio1 Drainage and erosi • Site and Constructi Other : ~~~~--~- ACKN OWLEDGMENTS ; lg Drainage Report two (2) copies each . inage Report two (2) copies each. I, ~~~fl.!. \,(/. lA>NOM4'~£ , design engineer, hereby acknowledge or affirm that: The information and conclusions contained in the above plans and supporting documents comply with the current requirements of the City of College Station, Texas City Code, Chapter 13 and its associated 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 of the College Station City Code . cJ. L. ~~r Property Owner(s) &Nf~f"a.."'iMf a~S1'fU<t.'~12$, tt.JC. Contractor ,. J UL 19 '95 1 1 :0BAM CON TE MPORARY CONSTRUCTORS INC P.4/4 Figure XII Continued CERTIFICATIONS : (for proposed alterations within designated flood hazard areas.) A. I , T?t>tJ [ZaJ fJ ~t..DI -~---' 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 stonn. ·JZ c:J:?A4 h71 ----ll=-'-11,~z~r !~f_f.....__..._?_-~ if:,~~~= D~ B. I, -.J 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 o above the base flood elevation established in the latest Federal Insurance Administration Floe>d Hazard Study and maps , as amended . Engineer Date C . I, 12Dt.f ~t-Jf£l.QC ___,certify that the alterations or development covered by trus 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 13 concerning encroachments of flood ways and of floq;ringes . / /~~p ~ /::77:!'1?7-. I, ~~ f3>tJ~ f€.Y?,-, do certify that the proposed alterations do not raise the level of the l O year flood above elevation established in the latest Federal Insurance Administration F~ 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 he reby grant this permit for development. AJI 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 . ' RONNFELDT ENGINEERING CONSULTANTS, INC. 4438 Centerview, Suite 311 San Antonio, Texas 78228-1430 (210) 734 -8755 DRAINAGE STUDY CELLULAR ONE NEW CELL SITE -S. COLLEGE STATION ARRINGTON ROAD August 7, 1995 This drainage analysis follows the procedures as outlined in the "Drainage Policy and Design Standards" which are contained in the "Stormwater Management Plan for the City of College Station". The subject property is located Southeast of the City of College Station near the intersection of Highway 6 and Green Prairie Road. The property if more precisely located on the West side of Arrington Road, approximately 1560 feet from the intersection of Arrington Road and Green Prairie Road. The subject property is in the Alum Creek watersh ~. Runoff from the property flows from the site along Arrington Road to a point approximately 1300 feet from the intersection of Arrington Road and Green Prairie Road. At this point the runoff flows under Arrington Road through a culvert. The runoff the follows a series of small tributaries until in flows into Alum Creek at a point West of Highway 6. This area lies in College Station Basin Reference No 10. The runoff area which includes the subject property is shaded in red on the attached "Drainage Map. This map is copied from the USGS "Wellborn Tex" quadrangle map (1961, revised 1980). The runoff area encompasses approximately 0.275 acres and includes the entire project site. The "Rational Method" has been used to calculate the volume of runoff from the drainage area. For this study the area is considered to be natural grassland. The slope of the drainage area is approximately: 20/1400 = 1.43% The runoff velocity is obtained from Table III_/'2, for natural grasslands, 1 -3%. v = 0 to 2.5 I /sec. Use 2.5 I /sec. o.tv· The time of concentration calculates as follows: 1400/2. 5x60 = 9. 33 minutes. From page 18, paragraph 3. C. ( 3), use tc = 10 minutes ·/o.\V· From Table III-1, the runoff coefficient for natural grasslands, 1 to 3.5% slope, = 0.35 to 0.45. For 1.43% use 0.4. f) 'f/• Drainage Report Cellular One, College Station Page 2 August 7, 1995 From Figure III-1, "Intensity Durat i on Frequency Curves for the City of College Station": Is = 7.0 cfs r 10 = 7. 7 cfs I zs = 9. 0 cf s I so = 10.2 cfs I 100 = 11.6 cfs Using these figures to calculate the runoff: Q = CIA Os = 0.4 x 7.0 x 0.275 = 0.77 cfs 010 = 0.4 x 7.7 x 0.275 = .847 cfs 0 2 s = 0 . 4 x 9 . 0 x 0 . 2 7 5 = 1. 0 0 cf s Oso = 0.4 x 10.2 x 0.275 = 1.12 cfs 0 100 = 0.4 x 11.6 x 0.275 = 1.28 cfs Assume that the· velocity through a culvert would be 6 '/sec. The area required for a culvert pipe (Q100 ) would be 1.28 /6 = 0.21 ft 2· For the culvert under the entrance road to the site use the smallest practice corrugated metal pipe, 15" dia. The area of the 15" dia pipe is 1.227 sq ft. 1.227 >.021 15" dia pipe is OK. REPORT 08 /16 /95 10:30 '8'409 764 3496 DEVELOPME NT SVC S TRANSMISSIO OK *************************** *** ACTIVITY REPORT *** *************************** TX /RX NO. 2964 CONNECTION TEL CONNECTION ID STA RT TIME USAGE THIE PAGES RESULT p12103499549pp396 08 /16 10 :28 01 '2 4 [.) ~001 * * * * * * * * * CITY OF COLLEGE STATION DEVELOPMENT SERVICES 11O1 TEXAS A VE. COLLEGE STATION, TX 77840 * FACSIMILE COVER SHEET TO: COMPANY: PHONE: FAX: FROM: * COMPANY: PHONE: {; 17) of Coif 'fJ e__ 5f 4fiOn (~)7tA-~?o FAX: DATE: PAGES INCLUDING THIS COVER SHEET: (409) 764-3570 (409) 764-3496 FAX * * * * * * * * * * CITY OF COLLEGE STATION DEVELOPMENT SERVICES 1101 TEXAS AVE. COLLEGE STATION, TX 77840 * FACSIMILE COVER SHEET TO: \}Ac. ~--\}e;\d-\-- COMPANY: * ------------ PHONE: FAX : ~QK {)[v,f,J&, ~<6 cun COMPANY: __,\)~t:N~"-~~-\j_\..c_· __.e_s _____ _ FROM: PHONE: FAX: DATE: PAGES INCLUDING THIS C OVER SHEET: * COMMENTS: ___________________ _ * * * * * * * * (409) 764-3570 (409) 764-3496 FAX * * * * ------ - 0 c 1' (-.,___ #3 Bar II II ESTIMATED QUANTITIES PPE . "O" "t' SIZES 18" · 3 ':-e" 12' 2411 4'-0" 15 1 3011 4'-6 11 18' 2-30" a'-s" · 18 RIPRAP C.Y. o.~ 0 .1 0 .9 1.4 . Wire Mesh Relnt .. . l Pipe The Contractor wllbe permitted to ·substitute Cl 8" cone. rfprap In place of pipe from the Junction of the center of plpe_wllh the 6 :1 slope . and the flowllne orode of the pfpe. Rlprop , used In Heu of pipe wnt not be lricluded In the pay quantity for rlprap, but wlR be considered subsidiary to other bid Items . Quantities shown ore for one end only. Qty. shown does not Include rlprap f oot1no. Footlnos, when nqulred\ wll be considered subsidiary to otner . bid Items. ____ __::S=:L:=O:=:PE~D=ET=A=ILS r-IR SIDEROAD CULVERTS I _J ,,/ ( .. 09 /01 /95 15:06 '5'409 764 3496 DEVELOPMENT SVCS TRA SMISSIO N OK TX /RX NO. CONNECTION TEL CO NNECT IO N ID START TIME USAGE TIME PAGES RES ULT *************************** *** ACTIVITY REPORT *** *************************** 3129 12107354413pp396 09 /01 15:04 01 '50 2 OK 14] 001 DEVELOPMENT PERMIT PERMIT NO . #298B FOR AREAS OUTSIDE THE SPECIAL FLOOD HAZARD AREA RE: CHAPTER 13 OF THE COLLEGE STATION CITY CODE SITE LEGAL DESCRIPTION: A 0.147-acre tract of land out of a 24 .97-acre tract out of the Augustus Babille Survey, Abstract No .75 , Vol 1850 , Pg 248 . SITE ADDRESS: Street Address -info unavailable OWNER: J. L. Gaut; Cellular One 13 23 8 Rain Lily Lane Houston, Texas 77083 DRAINAGE BASIN: Alum Creek TYPE OF DEVELOPMENT: This permit is valid for site grading , culvert construction and all site work associated with the building permit. The culvert shall be constructed of a 21" corrugated metal arch pipe with an upstream invert elevation of 311 .2' and a downstream invert elevation of 311 .0'. All disturbed areas must be final graded and seeded upon completion . 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 outside the special flood hazard area. All development shall be in accordance with the plans and specifications mitted to and approved by the City Engineer in the development permit application for h above named project and all of the codes and ordinances of the City of College Station t t apply . Date Owner Date Contractor Date : FROM '\ . 9. 6 .199 5 8 :3 1 .~Q~~F~LDT ENGiti~~RING CONStJ~TA~'.r$..1 ... JNC. 4438 Cenlervlew, Suite 311 San Antonio, Texas 78228-1430 (210) 734-8755 DRAINAGE INSTALLATION DETAILS CELLULAR ONE NEW CELL SITE -S. COLLEGE STATION ARRINGTON ROAD p. 1 September S, 1995 These "Drainage Installation Details" are to be considered a part of the plans and spec.;if .i.<.::aLions and other "Construction Documents 11 , for the construction of the "Cellular On~ South College Station New Cell Site". The drainage study for this project, submltted to the City of College Station on August 26, 1995, .indicated that the stormwater flows along Arrington Road at the s. College Cellular Oue Cell site will i:-equire the inst al lat ion of one 21" Corrugated Metal Arch Pipe. This pipe has a rise of 16 inches and a span of 25 inches. This piIJ~ is to be installed with an upstream inv~~t elevation of 311.2 and a downstream invert elevation of 311.0. These invert elevations are based on the elevations developed in a survey conducted on Ma.y 8, 1995 by Paul A. Wilkinson, RPLS, Norths'ta.r Land Surveying, and shown on the survey plan developed for this survey. The pipe installation is to include ''Safety End Treatment" which is to be as shown on the attached detail entitl~d "Slope Details for Sideroad OF INSTALLATION DETAILS ' -I IL "' "' .. "' . " "' "' 0 "' IL . ,> -0 11: ' # 3 9ar . " ESTIMATED QUANTITIES PPE ·'"o• "~' SfZES f8 .. · 3'r 8" 12· 24• 4•-0• 151 30" 4'-6" 181 2-3o'' e'-6'1 . -i8 fWlRAP C.Y o.:. 0.7 0.9 l4" '. l Pin . 1he Cor*octer -'lbl pemlltd to 'subeff1a1 • a 9· cone. rfprap In .,ac.c1 or pipe...., lht . )litelk>n of tlM center of .,m,e_...., lte 61.,.,. . and the nowln• trade of 1111 tilPt. Rlprvf , .aed h leu or p1.,e d ltGf be lncfucle d I• the pGJ quantity for rlprap, bul ..tlb• co-eldtred 9Ublld1orr to «>"•.bid lt1•1.. • Quantities ahown .,,. for Ont end OftlJ Olf. shaWftdOH Hf lillclude ~ rooting. FooU19,~~~,~ ll• c01sldend M1bsldlary to omer . Ud Items. -----~S:=L=:O=::PE~DE=:T~A~ILS-1R SIDEROAD CULVERTS J 8. 20. 1 9 95 0 : 1 3 p. 1 Pott-II " brand • Fax Transmittal Memo 1s12 To v 6-r ~ I? I ~t:X--).// rP //'-1 a .'·'{ From K (/' / ~ p '1-r at!-/ cl:f- . eoi...p•~YGt f..., ~ -+--c; 11~ a e.-· :? f a--h nt Col'l~•"t-~ti 11 f e,, I Ji-P.~ ~ / H e-~ Y7 ~ f ~~i tlon { 7 Location Dept oi(rg~ FHtt (.f (?JC/,... 7 6'1.-lLf'f ~ To lopho~o•1t:Jq'-?~<./AJJ/t:/Fu~ /CJ-?'!,..._ l/ '-/-/ ~ .Telepllonefl Z/t?-/?t..). 'll j'j.- Cornm onts Orig inal. 0 De stroy 0 Return 0 Ce ll f()I pickup D1&pos11oon: I Pl~1~ rc:::-~1c.-u.J / C/t?m..dt~//1-;?-/? 1~ /~ '( ~ t<. /;a~<=-~-H.,Y 9" e.. ~ //, ~~~~1~e :i .... ~Y~ CA?j?/ Wt/I ROJlNf.~.~PT ENG~N~~.R±!:l'_G. ... ~Q~_~µ~TANTS I INC. 4438 Cenlervi~w, Suite 311 San Antonio, Texas 78228-1430 (210) 734-0755 DRAINAGE STUDY CELLULAR ONE NEW CELL SITE -S. COLLEGE STATION ARRINGTON ROAD August 26, 1995 This drainage analysis follows Lhe p~u~edures as outlined in the "Drainage Policy and Design Standards" which dL't:~ contained in the "Stormwater Management Plan for the City of College Station". The subject property is located Southeast or Lhe City of College Station near the intersection of Highway 6 and Green Prairie Road. The property is more precisely located on the West side of Arrington Road, approximately 1560 feet from the intersection of Arrington Road and Green Prairie Road. The subject property is in the Alum Creek watershed. Runoff from the property flows from the site, to lhe South, along Arrington Road to a point approximately 3,500 feet from the intersection or Arrington Road and Green Prairie Road. At this poinl Lhe L·u11o[f flows under Arrington Road through a culvei.-t. The runoff the follows a series of smdll tributaries until in flows into Alum Creek at a point West of Highway 6. This area lies in College Station Basin Refex·ence Nu 10. The runoff area, which includes lhe subject property, is outlined with a heavy black dashed 1 ine on the attached "Drainage Map. This map ; has been copied from t.he con Lour map obtdined from the City of College Station. For purposes of this drainage report the subject area has been reduced in size to a l '1 :;:;; 200" scale, The runoff a1·ea encompdsses approximately 4.77 acres and includes the entire project site. (Planirneter reading ~ 312/60 = 5.2 in. sq. 5.2 x 200 x 200/43560 = 4.77 acres) from the drainage area. Fo f this study the area is consid~red tu be natural grassland. The slope of the drainage area is approximately: 12/1000 "" 1.20% The runoff velocity is obtained from Table III-2, page 24, !or natu~dl grasslands, 0 -3%. V ~ 0 to 2.~ '/sec. 1.2/3 ""0.4 , 0.4 x 2.5 = 1.0; use V = 1.0'/aec. The time of concentJ..-ation calculates minutes. From figure III-1, "Intensily City of College Station, 1 25 .,. 7. 7 CFS. as follows: 1000/l.x60 = 16. 66 Du r ation Frequency Curves for the FRO l'I p. 2. ....... , ________ ......., ____________ ........... ....._ ___ _ Drainage neport rPllul~r On~, CollQga Station Paqe z Auqust 26, 1995 From Table III-1, paqc 23, the runoff coetticient for natural gr~~s18nds, 1 to 3.5% 3lope, • 0.~5 to 0.45. Slope ~ 1.2%, 0.2 x 0.1 = 0.02. Fnr l .20% use C ~ 0 .02 + .35 ~ 0.37. Using thC$C figurea to calculate Lhe runoff: Q ~ CIA g25 = 0.31 x 1.1 x 4.11 = 13.59 ~fs Assume that the v~ln~ity through a culv~rt would be 6 '/sac. The ai::·ea. required for a culvert plpe co 100 ) would be 13. ~9/6 = 2. 26 ft 2· The area of a 21" C':MPA is 7.. 20 ft2. Due to the assumptions made to comp le Lt= Lhll::I ctudly:::1l:::1, tht! l:Hifety :!actors t>U1l r. into tl'1e f iguz.·es used and the inherent inaccuracic:;; o! tilt:: :n1tional method, as the area of the 21" CMPA is very clo~P. t.o t.hP. c;;1lculat~d requir~m~nt, I would consider thaL a 21" CMPA wuulu l.J~ a<l~qutite to accommoelate the runoff volume r:rom a. 25 year frequency rain storm. I would reconunend the installation of one, 21" CMPA pipe t .o i'lr.r.nmmnch'lti;>. the dt :~i11C.1Ji..>. ~-''"' ~t. or TE.lo'~,, END OF' llL'.l'OR'I' P:!···· ••• ····•·-:J.r •• n.c. '• ' ""• .. -... ' .//' I ·a1 . t~: ............................ . l ROY J . AON FE..cJ• .. cJ..-~···:············· I •t41 f / l ..e' , " r.i,·~ ' • ..:-a I ~°\m1(j . A ~-I. " /]' ~,, ,, ... 1119 l6' . . .. \ .. / I /\., ·~ ·/ FRO N p. :s DRAINAGE MAP CELLULAR ONE S. COLLEGE STATION CELL SITE SCALE: 1" -200' --"' . Ii) RONNFELDT ENGINEERING CONSULTANTS, INC, ) • 44,J~ CENTERVIEW OFWe . SUITE 311 SAN ANTONIO, TEX/>.S 78228 ,. !. I I I I I I I I L --- · .... ACCO UNT NO . _________________ _ 3688 54 CITY OF COLLEGE STATION . Pa id by_-Check \ \ :;}_ \ . Cash .:....:· '--~ THANK YOU