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Home My WebLink About56 Development Permit 620 Longmire Office ComplexDEVELOPMENT PERMIT PERMIT NO. 620 LONGMIRE OFFICE CENTER FOR AREAS OUTSIDE THE SPECIAL FLOOD HAZARD AREA RE : CHAPTER 13 OF THE COLLEGE STATION CITY CODE SITE LEGAL DESCRIPTION: Tract B Ponderosa OWNER: MWM Corporation Box 10220 College Station, Texas 77842 409-693-1617 DRAINAGE BASIN: Bee Creek Trib A SITE ADDRESS: TYPE OF DEVELOPMENT:This permit is valid for the construction of the Longmire Office Complex and site development as shown on the attached plans. The Contractor shall take all necessary precautions to prevent silt and debris from leaving the immediate construction site in accordance with the approved erosion control plan as well as the City of College Station Drainage Policy and Design Criteria. The Owner and/or Contractor shall assure that all disturbed areas are sodden and establishment of vegetation occurs prior to removal of any silt fencing or hay bales used for temporary erosion control. The Owner and/or Contractor shall also insure that any disturbed vegetation be returned to its original condition, placement and state. The Owner and/or Contractor shall be responsible for any damage to adjacent properties, city streets or infrastructure due to heavy machinery and/or equipment as well as erosion, siltation or sedimentation resulting from the permitted work. Any trees required to be protected by ordinance or as part of the landscape plan must be completely fenced before any operations of this permit can begin. In accordance with Chapter 13 of the Code of Ordinances of the City of College Station, measures shall be taken to insure that debris from construction, erosion, and sedimentation shall not be deposited in city streets, or existing drainage facilities . I hereby grant this permit for development of an area outside the special flood hazard area. All elopment shall be in accordance with the plans and specifications submitted to and approved by the i Engineer in the development permit application for the above named project and all of the codes and · ces of Ci of College Station that apply . Date 10/16 fez& Owner/ Agent Date Contractor Date Figure Xll Development Permit City of College Station, Texas SiteLegalD esc ription :_~-~~~-~~~-~-~~~~-~~~~~~~~~~~~~- SiteOwner:MvJM.. ~ Address : ~~\O'"LL-0 CJ ... ~11~cfZ. Telephone: 4<J&t / l?C13 -1 (b\1 Architect/ /J .I"\ Engineer : (_,, t b A-QA~ \JJI Contracto d'l~ ~l.t ~· Date Appli cati o n Filed : ________ _ Address : 2-~<Jq S:,.ili_,~ M-- Telephone No : -r10~s40 Address :~~ \0-Z"U? CS. 118¥r<._ TelephoneNo :ZfOdf ( 6fB-/fJl1 Approved : ___________ _ Appl ic ation is hereby made for the following devel o pment specific waterway alteration s : 0 Application Fee 0 Sign e d 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: ------------------------------ ACKNOWLEDGMENTS : r.0~ design e ng ineer/owner, here by acknowledge or affirm that: The information a nd conclusion s 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 D ra inage Policy and D es ign Standards . As a condition of approval of this permit applicati o n, I agree to construct the improvemen t s proposed in this application according to these docume nts and the requirements of Chapte r 13 of the College Station City Code . '{Vwtrl\_C4CP--"---'--------- Property Owner(s) Contractor Figure XII Continued CERTIFICATIONS : (for proposed alterations within designated flood hazard areas .) A. I, certify that any nonresidential structure on or proposed to be on this site as part of this application is designated to prevent damage to the structure or its contents as a result of flooding from the l 00 year storm . Engineer Date B. I, certify that the finished floor elevation of the lowest floor, including any basement, of any residential structure, proposed as part of this application is at or above the ba se flood elevation e stablished in the latest Federal Insura nce Administration Flood Hazard Study and maps, as amended . Engineer Date C. I, certify that the alterations or development covered by this permit shall not diminish the fl o od-carrying capa c ity 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 floodway fringes. Engineer Date I, do certify that the proposed alterations do not raise the level of the 100 year flood above elevation established in the latest Federal Insurance Administration Flood Hazard Study . Engineer Date Conditions or comments as part of approval: -------------------- In accordance with Chapter 13 of the Code of Ordinances of the City of College Station, measures shall be taken to insure that debris from construction, erosion, and sedimentation shall not be deposited in city streets, or existing drainage facilities. I hereby grant this permit for development. All development shall be in accordance with the plans and specifications submitted to and approved by the City Engineer for the above named project. All of the applicable codes and ordinances of the City of College Station shall apply . fonu1/i:nwl\1n-n11t/I 0 ·9J ESMOND ENGINEERING. INC. Environment & Infrastructure CRYSTAL PARK PLAZA • 2700 EAST BYPASS • SUITE 4600 • COLLEGE STATION , TEXAS 77845 OFFICE (409) 764-7640 •WATS (800) 444-7640 • FAX (409) 693-6729 .....i11iiiii September 17, 1998 Veronica Morgan, P.E. Assistant City Engineer City of College Station P.O. Box 9960 College Station, TX 77842 Re: Site Drainage for Longmire Center Dear Ms. Morgan: We have performed a drainage analysis of the proposed development as a result of our earlier work for Longmire Self Storage, Ponderosa Place, Section Two . My understanding is that the site plan has been submitted to the City and is in the final review process. Please incorporate this document into your site plan review. The subject development consists of a total of 2.365 acres adjacent to Longmire Drive, which is to be developed as a commercial center with stand-alone buildings, paved parking lots, and 6" concrete curbs. On-site runoff will flow toward the rear (wes tern property line), exit the subject tract through a curb leave-out, enter a designated private drainage easement, and thence discharge into the existing retention basin which has reserve capacity to handle the subject development. The runoff coefficient ("C factor") used to design the retenti o n basin was 0.95. Approximately 18,000 sq.ft. of green area will be incorporated into he proposed development. Applying the City's drainage design standards, a runoff coefficient of 0.80 was calculated for the developed site. Therefore, the original design anticipated peak flows approximately 15 percent higher than the proposed development would generate. The original drainage study for Longmire Self Storage determined that the 100 year undetained runoff generated on this tract was equivalent to: 65.95 cfs/5.554 acres = 11.87 cfs/acre. Drainage within the subject tract will be as follows. There wi ll be no storm sewers and all runoff will be managed by s urface contours. Approximately 40 percent of the runoff will be handled in the parking lot running in a northerly direction parallel to Longmire, then turn at the north driveway and flow toward the rear of the property. The remaining 60 percent will be directed along the parking lot in a westerly direction to the rear of the property, then turning north along the rear parking lot to join the runoff from the ot her portion of the tract before discharging into the private drainage easement. ! The hydraulic configuration of the parking lot will consist of 6" curbs and a swale in the center and minimum depth of0.25'. At slopes of0.6% to 1.0%, the 100 year runoff should be confined within the subject tract until it is diverted to the private drainage easement. Runoff velocities approaching the curb leave-out will be 3.0 to 4 .5 fps . The height of the curbs around the dumpster and in the vicinity of the curb leave-out will be increased to approximately one foot to prevent water from overrunning the curb onto adjacent property toward Lodgepole. The curb leave-out will be sculptured in a transition to form a rectangular flume downstream of . the parking lot, approximately 9 to 10 feet wide. The rectangular concrete flume will convey all runoff from the subject tra c t from the parking lot into the retention basin. Please advise if you need any additional information. Very truly yours, ESMOND ENGINEERING, INC. c: James H . Woods F :\9~04 7 \c s-02. wpd ,,.,.· .. ~P-17-1998 16=25 ESMOND ENGINEERING ESMOND ENGINEER IN 2700 East Bypass Suite College Station Texas 7 845 409/764-7640 • 800/44 -7640 Fax 409/693-6729 FAX Date: To: Fax: Voice: From: Re: 4096936729 P.01 September 17, 1998 Veronica Morgan @ City of College Station 764-3496 764-3763 Steven E. Esmond, P.E. Longmire Center Hard copy sent? Being sent by: Mai! Pages including this 3 COMMENTS: Veronica, Attached is the drainage re . rt which incorporates your comments from 911 /98. It should correspond with revised dr wings that are being submitted to you by the developer. .. SEP-17-1998 16:25 ESMOND ENGINEERING 4096936729 P.02 ESMOND E GINEERING. Environment&. lnfrastr cture INC. CRYSTAL PARK PLAZA • 2700 EA BYPASS• SUITE 4600 •COLI.EGE STATION, HXAS 77845 OFFICE (409) 764-7640 • WATS <8 0) 444-7640 • FAX (409} 693-6729 September 17, 1998 Veronica Morgan, P .E. Assistant City Engineer City of College Station P.O. Box. 9960 College Station, TX 77842 Re: Site Drainage for L ngmire Center Dear Ms. Morgan : We have performed a drai 1age analysis of the proposed development as a result of our earlier work for Longmire Self St rage, Ponderosa Place, Section Two . My understanding is that the site plan has be.en submitted to the City and is in the final review process. Please incorporate this document into your site pl n review. The subject development c nsists of a total of 2.365 acres adjacent to Longmire Drive, which is to be developed as a com ercial center with stand-alone buildings, paved parking lots, and 6" concrete curbs. On-site nm ff will flow toward the rear (western property line), exit the subject tract through a curb leave-o t, enter a designated private drainage easement, and thence discharge into the existing retention asin which has reserve capacity to handle the subject development. The runoff coefficient. ("C factor") used to design the retention basin was 0.95. Approximately 18,000 sq .ft. of green ar will be incorporared into he proposed development. Applying the City's drainage design s dards, a runoff coefficient of 0.80 was calculated for the deyeloped site. Therefore, the origin-I design anticipated peak flows approximarcly 15 percent higher than the proposed development would generate. The original drainage stu y for Longmire Self Storage determined that the 100 year undetained runoff generated on this tract was equivalent to: 65. 95 cfs/5.554 acres = 11.87 cfs/acrc. Drainage within the subjec tract will be as follows . There will be no storm sewers and all runoff will be managed by surfac contours. Approximately 40 percent of the runoff will be handled in the parking lot running i a northerly direction parallel to Longmire, then turn at the north driveway and flow towar the re.ar of the property . The remaining 60 percent will be directed along the parking lot in a esterly direction to the rear of the property. ch en turning north along the rear parking Int to joi the runoff from the other portion of the tract before discharging into the private drainage e.a~er ent. S£P-17-1998 16=26 ESMOND ENGINEERING 4096936729 P.03 Drainage Report Page 2 ~:;~:m:~:~t;t:~:~~~~i:r q~:~~~s~:7;:;:::;;:;:;'~,~:r: :~~::~B:~L!sh::'E ':::·0+~;i,:(5 ::::~~~'.:::a:~':::;2s~~::~~:&;~dhi:';':::;:;;~s~('.F •·'.::~::::-\:~:::-~!:~~~&.~~t~:i:~~~:f;:§~i~~~ The hydraulic configuratio 1 of the parking lot will con si st of 6" curbs and a swale in the center and minimum depth of 0.25 . At slopes of 0 .63 to 1.03 , the 100 ye.ar runoff should be confined within the subject tract un il it is diverted to the private drainage easement. Runoff velocities approaching the curb lea e·out will be 3.0 to 4.5 fps. The height of the curbs around the dumpster and in the vicinit of the curb leave-out will be increased to approximately one foot to prevent water from overru ming the curh onto adjacen t property toward Lodgepole. The curb leave-out will be sculptured in a rransition to form a rectangular flume downstream of the parking lot , approximat ly 9 to IO feel wide . The rectangular concrete flume w i ll convey all runoff from the subject tra ·t from the parking lot into the retention basin . ny addicional information. Very truly yours , ESMOND ENGINEERIN . , INC. President c: James H. Woods TOTRL P.03 ESMOND ENGINEERING . INC. Environment & Infrastructure CRYSTAL PARK PLAZA• 2700 EAST BYPASS • SUITE 4600 • COLLEGE STATION , TEXAS 77845 OFFICE (409) 764-7640 •WATS (800) 444-7640 • FAX (409) 693-6729 September 17, 1998 Veronica Morgan , P.E. Assistant City Engineer City of College Station P.O. Box 9960 College Station , TX 77842 Re: Site Drainage for Longmire Center Dear Ms. Morgan: We have performed a drainage analysis of the proposed development as a result of our earlier work for Longmire Self Storage , Ponderosa Place , Section Two. My understanding is that the site plan has been submitted to the City and is in the final review process. Please incorporate this document into your site plan review. The subject development consists of a total of 2 .365 acres adjacent to Longmire Drive , which is to be developed as a commercial center with stand-alone buildings, paved parking lots, and 6" concrete curbs . On-site runoff will flow toward the rear (western property line), exit the subject tract through a curb leave-out , enter a designated private drainage easement, and thence discharge into the existing retention basin which has reserve capacity to handle the subject development. The runoff coefficient ("C factor ") used to design the retention basin was 0.95. Approximately 18 ,000 sq.ft. of green area will be incorporated into he proposed development. Applying the City 's drainage design standards, a runoff coefficient of 0.80 was calculated for the developed site. Therefore, the original design anticipated peak flows approximately 15 percent higher than the proposed development would generate . The original drainage study for Longmire Self Storage determined that the 100 year undetained runoff generated on this tract was equivalent to: 65.95 cfs/5.554 acres = 11.87 cfs/acre. Drainage within the subject tract will be as follows. There will be no storm sewers and all runoff will be managed by surface contours. Approximately 40 percent of the runoff will be handled in the parking lot running in a northerly direction parallel to Longmire, then turn at the north driveway and flow toward the rear of the property . The remaining 60 percent will be directed along the parking lot in a westerly direction to the rear of the property , then turning north along the rear parking lot to join the runoff from the other portion of the tract before discharging into the private drainage easement. Drainage Report Page 2 k _.·.·_.?._.··.·.· .. ·.·.·_.n •• _.·.· .• ·.= .• g·:·-·.·· .• ·.:_.··.m_.·.· .• ·.·.:.:: •. _·.= •. '.1···',' •. '.r·· .• · •. ·.-~.-· • .-.... .-.... c .......... .-.·· . .-.·· .. e ................ n .......... = .• '.·t···'· •• e_,_,=·.:_: ....... r_ ..... ·.• . .-.·= •. · .• : •..•.• :.·.=.'._;·'··'·'.•' .••.•.• •.• .• ·.·.·.·.=.·.'.'.'.'.•.=.•.=.•.·.·.=,•,=,•,=.•.=.','.','.'·''''''';;;:'•' ..••• ,.,,,,.,.· :::}:•:_::_:_·,.,.,:.·.:_:.=.·,:.:,:·,'.· .. '·',.-,:• .. ·: ....... ·.:_ .. :'_:.:_.-.··.:.:_.-.-' ... ='.-',-'''',:',.-_·.·.'·',.-.:_',-',··.:.·.: •. :._:.· •. _:.·.: • .-.... .-• .-,.-• .-• .-................ ·.·.·,·,·,·,·.· .. ·.,·,·,·.·. t•.=•·.•·.:•.==-.·•.=•.=•.'.''·''·''·'•·.'•.=.=.= .•.• ·.·,·.· • .-., •• ·,·.·.·.·,·.·.·.·,·.·.·.·.·.· .• ··,·,· •.•.. • . .-.-' • .-,-'.-',-' ... ,-' .... -',-',-',-',-',•',-',•',',·'.','.'.'.'.'.'.'.'.'.','.', .•.• §7P!~rn?:.~t: ..... ~Zh 12.~ .. ~. {;}:]{)?{''.{ .;:::,,):}f:::••·•:::=:::;:::::;:::::::;•:•;:::: The hydraulic configuration of the parking lot will consist of 6" curbs and a swale in the center and minimum depth of 0.25'. At slopes of0.6 % to 1.0 %, the 100 year runoff should be confined within the subject tract until it is diverted to the private drainage easement. Runoff velocities approaching the curb leave-out will be 3.0 to 4.5 fps. The height of the curbs around the dumpster and in the vicin ity of the curb leave-out will be increased to approximately one foot to prevent water from overrunning the curb onto adjacent property toward Lodgepole. The curb leave-out will be sculptured in a tran sition to form a rectangular flume downstream of the parking lot , approximately 9 to 10 feet wide . The rectangular concrete flume will convey all runo ff from th e subject tract from th e parkin g lot into th e retention basin. Please advise i f you need any additional information. Very truly you rs , ESMOND ENGINEERING , INC. c: Ja1n es H. V/ood s F :\98047\cs-02 .w pd ~~~~J.e ~?MQ~graf ~§INEERING, INC. ~ l CRYSTAL PARK PLAZA• 2700 EAST BYPASS• SUITE 4600 •COLLEGE STATION, TEXAS 77845 --E,. OFFICE (409) 764-7640 •WATS (800) 444-7640 • FAX (409) 693-6729 September 1, 1998 Veronica Morgan, P.E. Assistant City Engineer City of College Station P.O . Box 9960 College Station, TX 77842 Re: Site Drainage for Longmire Center Dear Ms . Morgan: We have performed a dra inag e analysis of the proposed development as a result of our earlier work for Longmire Self Storage, Ponderosa Place, Section Two . My understanding is that the site plan has been submitted to the City and is in the final review process. Please incorporate this docum ent into your site plan review. The subject development consists of a total of 2.365 acres adjacent to Longmire Drive, which is to be developed as a commercial center with stand:O:alorie 'buildings, paved parking lots~ arid 6~ concrete curbs. On-site runoff will flow toward the rear (western property line),· exit the subject tract through a curb leave-out, enter a designated private drainage easement, and thence discharge into the existing retention basin which has reserve capacity to handle the subject development. The runoff coefficient ("C factor") used to design the retention basin was 0.95. Approximately 18,000 sq.ft. of green area will be incorporated into he proposed development. Applying the City's drainage design standards, a runoff coefficient of0.80 was calculated for the developed site. Therefore, the original design anticipated peak flows approximately 15 percent higher than the proposed development would generate. The original drainage study for Longmire Self Storage determined that the 100 year undetained runoff ge nerated on this tract was equivalent to: 65.95 cfs/5 .554 acres = 11.87 cfs/acre. Drainage within the subject tract will be as follows. There will be no storm sewers and all runoff will be managed by surface contours. Approximately 40 percent of the runoff will be handled in the parking lot running in a northerly direction parallel to Longmire, then tum at the north driveway and flow toward the rear of the property. The remaining 60 percent will be directed along the parking lot in a westerly direction to the rear of the property, then turning north along the rear parking lot to join the runoff from the other portion ·of the tract before dischargiilg into the private drainage easement. -· . · · · ·- Drainage Report Longmire Center Page 2 September 1, 1998 The hydraulic configuration of the parking lot will consist of 6" curbs and a swale in the center and minimum depth of O. 25' . At slopes of 0. 6 3 to 1. 0 3, the 100 year runoff should be confined within the subject tract until it is diverted to the private drainage easement. As runoff approaches the curb leave-out, the runoff velocity will increase to 7-8 fps. The height of the curb around the dumpster and in the vicinity of the curb leave -out will have to be increased to approximately one foot to prevent water from overrunning the curb onto adjacent property toward Lodgepole. The curb leave-out should be sculptured to form a flume approximately 9 feet wide, or a curb stop can be installed cross-flow if the surrounding curb height is increased by 0.5 foot. The 40 foot.wide private drainage easement shown on the site plan will dirccttunoff from the curb- leave-out to the retention basin. This private easement is assumed to remain an earthen channel with a slope of approximately 0.8 percent. Based upon this assumption, the channel should be deepened to provide at least 1 foot of freeboard all the way from the edge of the subject property to the entrance to the retention basin. Please advise if you need any additional information . Very truly yours, ESMOND ENGINEERING, INC. President F :IG & A\Corri!spondencc\cs--01.wpd