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HomeMy WebLinkAbout76 Development Permit 651 Edelweiss 15-BDEVELOPMENT PERMIT PERMIT NO. 651 EDELWEISS ESTATES, PHASE 15-B FOR AREAS OUTSIDE THE SPECIAL FLOOD HAZARD AREA RE: CHAPTER 13 OF THE COLLEGE STATION CITY CODE SITE LEGAL DESCRIPTION: SITE ADDRESS: EDELWEISS ESTATES, PHASE 15-B SOPHIALN OWNER: Begonia Corporation James 0 , Crowell, President 1901 San Jacinto Houston, Texas 77002 713-645-0060 DRAINAGE BASIN: Bee Creek Trib A TYPE OF DEVELOPMENT: SUBDIVISION CONSTRUCTION AS PER APPROVED PLANS The Contractor shall take all necessruy 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 inside 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/ Agent Date Contractor Date ER/NG, INC. McCLURE ENGINE 1722 Broadmoor Bryan , Texas (409) 776-6700, Fax: ( , Suite 210 77802 409) 776-6699 TRANSMITTAL LETTER TO: Mr. Jeff Tondre, Graduate Engineer Development Engineering Dept. Date: 5/19/99 Proj. # Attn: CITY OF COLLEGE STATION RE: Edelweiss Estates, Phase 15-B Edelweiss Business Center, Lots 1-3, Blk 4 We are sending you the following: r8J Attached 0 U nder Separate Cover Via: 0 Invoice 0 Prints 0 Plans 0 Contractor Invoice 0 Bid Books 0 Specifications 0 Change Order 0 Contracts r8J Other Copies Date No. Description 1 4/27/99 Phase 15-B Copy o f Dev . Permit Application , N.0 .1. form & fees receipt & Const ruction Cost Estimate 1 5/10/99 Edel. Bus. Center Copy of Dev. Permit Application, Drainage Letter & Fee Recei pt These are transmitted as follows 0 For Approval 0 Approved as Submitted Sets to be approved and returned to me r8J For your use 0 Approved except as noted Copies for your files r8J As Requested D Resubmitted after Revisions Corrected Prints -- 0 For Review Comments 0 Other REMARKS: COPY TO: SIG NED: Michael R. McClure , P.E., R.P.L.S. President - /NEERING, INC. McCLURE ENG 1722 Broadm Bryan, Te (409) 776-6700, Fa oor, Suite 210 xas 77802 x: (409) 776-6699 TRANS MITT AL LETTER TO: Mr. Jeff Tondre, Graduate Engineer Development Services Date: 4/27/99 Proj. # Attn: CITY OF COLLEGE STATION RE: EDELWEISS ESTATES, PHASE 15-8 We are sending you the following: r8] Attached D Under Separate Cover Via: D Invoice D Prints D Plans D Contractor Invoice D Bid Books D Specifications D Change Order D Contracts r8] Other Development Permit : t~~~-~~f· .. : .. . :-.--: ... .. ,... ... ) .. :_,_.; . ~Cription 1 4/99 De velopment Pennit Application t--~~~~~-+-~~~~~-+-~~~~~-+- 1 4/99 Co PY of Completed N.0 .1. t--~~~~~-+-~~~~~-+-~~~~~-+- 1 ~9 D evelopment Pennit Fee of $100 .00 t--~~~~~-+-~~~~~-+-~~~~~-+- 1 ~9 s ubdivision Inspection Fee of $300.00 These are transmitted as follows r8] For Approval D Approved as Submitted Sets to be approved and returned to me D For your use D Approved except as noted Copies for your files Corrected Prints D As Requested D Resubmitted after Revisions . : ·"! ~ - D For Review Comments D Other REMARKS: COPY TO: SIGNED:~ :IR. McClure, P.E., R.P.L.S. President - FOR OFFICE USE ONLY CASE NO.: -----DA TE SUBMfITED: DEVELOPMENT PERMIT MINIMUM SUBMITTAL REQUIREMENTS __ $100.00 Development Permit Application Fee. __ Drainage and erosion control plan, with supporting Drainage Report two (2) copies each. __ Notice o(.I~tent (N.O.I.) if disturbed area is greater than 5 acres. ; 1; LEGAL DESCRIPTION EDELWEISS ESTATES, PHASE 15-B APPLICANT (Primary Contact for the Project): Name BEGONIA CDRPORATION, James 0. CrCMell, President Street Address 1 901 San Jacinto City Houston, TX State TX Zip Code 77002 E-Mail Address ------------- Phone Nwnber ( 713) 654-0060 Fax Number ( 713) 652-4926 PROPER1Y OWNER'S INFORMATION: Name Same as above ------------------------------------- Street Address -----------------City --------------- State ____ Zip Code ______ E-Mail Address ------------- Phone Number Fax Number -----------------------------~ ARCHITECT OR ENGINEER'S INFORMATION: Name Michael R. McClure, P.E., R.P.L.S., McCLURE ENGINEERJN;, INC. StreetAddress ----------------City-------------- State ____ Zip Code ------E-Mail Address -------------- Phone Number Fax Number ~----------------------------- Application is hereby made for the following development specific site/waterway alterations: Sul:xiivision construction in the Bee Creek Tributary "A" drainage basin. ACKNOWLEDGMENTS: I, James 0. Crowell, Pres. , ~owner, hereby aclmowledge or affirm that: The infonnation 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 pem1it application, I agree to construct the in1provements proposed in this application ing to these documents and the requ i rem en ts of Chapter 13 of the College Station City Code . o .~~~~~~~~ operty Owner(s) James o. Crowell President DEVELOPMENT PERMl"BEXXNIA CDRPORATION DPERM!T.DOC Jn"/99 Contractor I of2 CERTIF1CA TIO NS: (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 £1000.ing from the l 00 year storm . Engineer Date .. i . 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 base flood elevation established in the latest Federal Insurance Administration Flood Hazard Study and maps, as amended . Engineer Date C . I, Michael R. McClure, P. ;e:certify that the alterations or development covered by this ~ <liminish the flood-carrying capacity of the wate.way adjoining or crossing this permitted site and ~~It[ development are consistent with requirements of the City of College Station City Code, Chapter q~n~ · ·· •. ~ }~ encroachments of fl ways and of floodway fringes. &!.!. ....................... :· .. ~ .. ~ l MICHAEL R. McCLURE ii! Cf~ <t-/i-z/q1 \~i:' ... "3274o'""'1$J ---+----+__,,,_,.__,~:;.....___;;____ r f 0 ·-6>~ r.'O •' 0 ., Date ·~~··.,G'tSTE~y.•' ~ .;' fi' &s .......... ~<::> ~ '\{~~~1;.J;?-- D. 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 . 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. DEVELOPMENT PERMIT DPERMIT.DOC 3n4/99 2 of2 . THIS FORM REPLACES PREVIOUS FORM 3510-6 (8-92) . Form Approved. OIAB Ho. ~G--008' ~ See Reverse for Instructions ~f>'OVal oxplnoa : g..,JH!a &EPA United States Environmental Protection Agency NP DES Washington, DC 20460 ~ORM Notice of Intent (NOi) for Storm Water Disc.harges.Associated with Industrial Activity Under a NPDES General Permit Submission of Vis Notice of Intent coostitu:tes notice that the party Identified In Section II of this form intends to be authori.z~ by a ':'IPDES permit Issued for storm water disdlarges associated V(ith Industrial activi~ In the State identified in Section Ill of this form. Becoming a perrnittee obligates such discharger to comply with the~ and conditions of the permil A L NECESSARY INFORMATION MUST BE PROVIDED ON THIS FORM . . I. Permit Seledon: You must Indicate the NPDES Storm Waler general permit under which you are applying for coverage. Check one of these . Baseline D Baseline ill Multi-Sector D Crndustrial Construction (Group Permit) .IL Facil.ity Operator Information Name: I BJ=.t~. o.FJ • 1 /ir·. .C-10 1R.1P 1 0 1 ~1 A;T 1 I 1Q1tl..1 I I I I I I I I I I Phone : 1f1I131~ 1514-I D101 Co10 I Addres s: ll1Cf101l1 1S1A1N1 lj 1A-1C.1 I 1N1T101 I I I I I I I Status of [£] I · I I I I I I I I Owner/Operator: lffi010 1S1Tj 01Al1 I . State: t:u1J . ZIP Code: IJ 1710 I Ol;l. I -I City: I I I I I I I I I I I I I I I I I I Ill. Facility/Site loca:f°t0n Information Name : IE=,D1E,L 1W.E=11 1'S1S1 1E'1:5 01A ,T ,E' 1S I 1P 1tt1 A1 :S1E, 1 l 1518, I I I Is the facili~ located on Indian Lan s? (Y or N) @] Address : I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I City: !C.1D1L1L1€i61E1 1S1T11\iT1 I 101N1 I I I I I I I I State : IT1'f...I ZIP Code:l1171~ 14-151 -I I I I I latitud/11~I(;11 I~ I 2191 Longitude: !e1 31OI'-l-1OI~111 Quarter. LU Section: LU Township: I I I I I Range : I I I I I IV. Site Activity lnfocmation MS4 Operatoc Haine: I C.1 I 1T.Y1 IOIFI IC.I 01 L.I Ll£1 l:tlGI 1s;r1~;ri1 10 IA}I I I I I I I I I Receiving WaJ«Body: 181 E"1E"1 1C.1 R.1 E"1€1 k1 1T1f<1 l 1~1u 1'1A1R.1Y 1 1A1 I I I If you are filing as a co-pennittee, Mulli-Sectoc Eeanit A~ats Only_; enter storm YaTa< general pennit number: I I I I I I I I I I Based on the instructions provided in Addendum H of the Multi-Sector permit, are ·species Identified in Addendum H SIC or Designc:ed IC101 I I I in proximity to the storm water discharges to be covered Activity Code: Primary: I 2nd: I I I under this permit, or the areas of BMP construction to D control those storm water discharges? [LJ ('(or N) Is the facility required to submit monitori.ng data? (1, 2, 3, or 4) Will construction (land disturbing activities) be conducted D If You Have Arothec-Existing NPDES I I for storm water controls? (Y or N) Permit. Enter Pemil Number. I I I I I I I I D Is applicant subject to and in compliance with a written historic preservation agreement? (Y 0< N) V. Additional lr1bcmation Required for Construction Activities Only Project Start Date: Completion Date : Is the Storm Water Pollution Prevention Plan lo,Slo 1J l~.jl IOf1 lo11 l~U11 Estimated Area to be I Is, in compliance with State and/or Local [] Disturbed (in Acres): I I I I sediment and erosion ~s? (Y or N) VI. Certification:: The certification statement in Box 1 ·applies lo all applicants. The certification statement in Box 2 applies ~ to facilities applying for the Multi-Sector storm water general permit BOX1 BOX2 _AU. APPLICANTS: MUL Tl-SECTOR STORM WATER GENERAL PERMIT APPLICANTS ONLY: I certify unde<° pe.naJty of law that this I certify under penalty of law that I have read and understand the Part 1.8 . eligibility requiiemenls for document sid all attachments were coverage under the Mufti-Sector storm water general permit, including those requirements relating to prepared u'd9< ~direction 9f: supervisiqn the protection of species Identified in Addendum H . .. in aooordanot · a system designed to . ! :· assure that qualified personnel property To the best of my knowledge, the discharges covered under this permit. and construction of BMPs to gather and evaluate the information control storm water run-off, are not likely to and will not likely adversely affect any species identified in submitted. Based on my inquiry of the Addendum H of the Multi-Sector storm water general permit or are oehe<wise eligible for coverage due person oc peG)llS who manage the system, to previous authorization under the Endangered Species Act. or those peG)llS directly responsible for To the best of my knowledge, I further certify that such discharges . and construction of BMPs to gathering the information, the information submi tted is. to the best of my knowledge control storm water run-off, do not have an effect .on properties listed oc eligible for listing on the and belief. tr.ie, accurate, and complete . I National Register of Historic Places under the National Historic Preservation Act, or are otherwise am aware Iha there are significant penalties eligible for coverage due to a previous agreement under the Nationa: Historic Preservation Act. for submitti~ lalse information, including the I understand that Continued coverage under the Multi -Sector genera: permi t is contingent upon possibili ty d. fine and imprisonment for knowing violaioos . maintaining eligibility as provided for in Part l.B . Print Name : I c.T /\ • f'-f • ~ } ' '0, c Ro "'-' i:: l. (.. . r ,R ,c:. , :i-• -i:: D ll. µ, T, J L~ 1.q z, ' I !i_!l I Da te: Sionalure : ( L -~ r: / (/ {) ~-:..eg_J ~ _(b; __ -___ J I -.. EP A Form 351 0 -{' ·~·9 CITY OF COLLEGE STATION *** CUSTOl'IER RECEIPT *** OPER: l'IRODGERS CT DRAWER: 1 DATE: 4/27/99 00 RECEIPT: 0026655 DESCRIPTION QTY Al'IOUNT TP Tl'I FILING FEE/DS/BI 1 $300.00 *B7 CK BEGONIA CORP-CK1216 INSPECTION FEE EDELWEISS PH. 15-B l'IR TENDER DETAIL CK 1216 $300. 00 DATE: 4/27/99 Til'IE: 15:26:56 TOTAL PERSONAL CHECK $300 00 Al'IOUNT TENDERED $300: 00 THANK YOU CITY OF COLLEGE STATION *** CUSTOMER RECEIPT *** OPER: l'IRODGERS CT DRAWER: 1 DATE: 4/27/99 00 RECEIPT: 0026654 DESCRIPTION QTY AKOUNT TP TK FILING FEE/DS/BI 1 $100.00 *B7 CK BEGONIA CORP-CK1215 DEVL PERKIT EDELWEISS PH. 15-B KR TENDER DETAIL CK 1215 $100.00 DATE: 4/27/99 Til'IE: 15:26:16 TOTAL PERSONAL CHECK $100.00 Al'IOUNT TENDERED $100. 00 THANK YOU Item No. 1 2 3 4 5 6 7 8 9 IO 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Description Mobilization Prepare Work Area Earthwork 1.5" HMAC Surface Course Edelweiss Estates Phase 15B Engineer's Estimate April 1, 1999 Unit Paving Construction Lump Sum Lump Sum C.Y. S .Y . 6" Lime Stabilized Subgrade (6% dry lime by weight) S.Y. Extra Lime Ton 6" Crushed Limestone Base S.Y. Layback Curb and Gutter L.F. Concrete Apron, Type A S.F. 4" Sidewalk S.F Sidewalk Ramps S.F End of Road Markers Each Quan ti Unit Price! 1 1,000.00 1 2,000.00 1,100 3 .75 2,569 4.35 3,266 3.15 40 85 .00 2,569 5 .75 1,606 7.00 1,125 3.75 1,255 2.50 109 6.00 3 125 .00 Paving Subtotal Drainage Construction 12" Reinf. Concrete Pipe, Non-Structural Backfill L.F. 41 25 .00 24" Reinf. Concrete Pipe, Structural Backfill L.F. 37 45.00 24" Reinf. Concrete Pipe, Non-Structural Backfill L.F. 33 38.00 27" Reinf. Concrete Pipe, Structural Backfill L.F. 192 55.00 30" Reinf. Concrete Pipe, Structural Backfill L.F. 31 62.00 30" Reinf. Concrete Pipe, Non-Structural Backfill L.F. 17 57.00 Concrete Apron S.F . 1,125 3.75 Concrete Spillway S.F . 486 3.75 Concrete Flume S.F . 396 3 .75 10' Curb inlet EACH 4 2,650.00 Dry Rip-Rap S.Y. 75 18.50 Plug for 27" RCP EACH l 100.00 Sloped Headwall for 30" RCP EACH l 1,000.00 Sloped Headwall for 12" RCP EACH 2 450:00 Inlet Protection EACH 5 80 .00 Silt Fence L.F. 470 2.00 Construction Exit for Silt Control S .Y. 1 7 .00 Fibennulch Seeding S.Y. 6,2 50 0.25 Drainage Subtotal Page l of2 Total 1,000.00 2,000.00 4 ,125.00 11,175 .15 10,287.90 3,400.00 14,771.75 11,242.00 4,218.75 3,137.50 654.00 375.00 66,012 .05 1,025.00 1,665.00 1,254.00 10,560.00 1,922.00 969.00 4 ,218.75 1,822.50 1,485.00 10 ,600.00 1,387.50 100.00 1,000.00 900.00 400.00 940.00 7.00 1,562.50 41 ,818.25 • Item No . 3 1 32 33 34 35 36 37 38 39 40 4 1 42 43 44 45 46 47 48 49 50 51 52 53 54 Edelweiss Estates Phase lSB Engineer's Estimate April 1, 1999 Description Unit Water Line Construction 8" PVC Water Line, Non-Structural Backfill L.F. 6" PVC Water Line, Structural Backfill L.F . 6" PVC Water Line, Non-Structural Backfill L.F. Fire Hydrant Assembly, Type II EACH 8" Gate Valve EACH 8"x 13" Anchor Coupling EACH 8"x 6" Tee EACH 6" Gate Valve EACH 6"x 13" Anchor Coupling EACH 2 " Blow-Off Assembly EACH Remove blow-off and connect to existing water line EACH 1.5'' Type K Copper Water Ser..'.':: 10 ft . (4' length) EACH 1.5'' Type K Copper Water Ser.> 10 ft . (43 ' avg. Ieng EACH Trench Safety (water line) L.F . Quanti Unit Price! 300 15.00 137 23.00 435 15.00 1 1,800.00 1 612 .00 1 180 .00 1 200.00 1 412.00 1 98 .00 2 500 .00 1 300 .00 1 400 .00 4 800 .00 240 1.00 Water Line Subtotal Sewer Line Construction 6" PVC , ASTM D-3034, structural backfill L.F. 239 18 .50 6" PVC, ASTM D-3034, non-structural backfill L.F. 608 14.00 6 11 PVC, ASTM D-2241 , structural backfill L.F . 40 32.00 Standard Manhole, 5-8 ft. deep EACH 1 1,300.00 Standard Manhole, 10-12 ft. deep EACH 2 1,700.00 Connect to Existing Manhole EACH 1 500.00 6" Sewer Clean-Out EACH 1 250.00 4" PVC Sewer Service,.::: 10 ft., (6.4 ft . avg. length) EACH 5 300.00 4" PVC Sewer Service,> 10 ft., ( 58.9 ft. avg . length) EACH 5 1,050.00 Trench Safety (sewer line) L.F. 885 1.50 Sewer Line Subtotal Total Construction Cost Page 2 of 2 Total 4,500 .00 3,151.00 6 ,525.00 1,800.00 612 .00 180 .00 200.00 412.00 98 .00 1,000 .00 300.00 400 .00 3,200.00 240.00 18 ,118.00 4,421.50 8,512.00 1,280 .00 1,300.00 3,400.00 500.00 250 .00 1,500.00 5,250.00 1,327 .50 27,741.00 $153,689.30 Drainage Report FOR .Edelweiss Estates Phases VICINITY MAP NTS March, 1999 Revised April, 1999 Prepared By: McClure Engineering, Inc. 1722 Broadmoor Drive, Suite 210 Bryan, Texas 77802 ( 409) 776-6700 I 1 I McCLURE ENGINEERING, INC.--------...... April 14 , 1999 Jeff Tondre City of College Station P.O. Box 9960 College Station, Texas 77842 RE: Drainage Report and Plan Sheet 5 revisions for Edelweiss Estates, Phase 14-A and 15-B Dear Jeff. This letter is to address your comments on the "Drainage Report For EDELWEISS ESTATES, PHASES 14-A AND 15-B", and Plan Sheet 5. Your main concern about the decrease of the proposed conditions drainage area from the existing conditions drainage area has been corrected. It is still correct that the drainage area is decreased, but the area of the detention fucility and the area from proposed lots along the Southwood Valley property were not included in the proposed conditions drainage area. Exhibit B-2 has been updated to include the drainage area of the pond and Drainage Area "8" which is the proposed lots along Southwood Valley. The proposed conditions drainage area still is decreased due to the developments of Phases 12 and 15-A. This development diverts some of the proposed conditions drainage area to the existing detention pond located north of Innsbruck Circle. Also, a small portion of the proposed conditions drainage area will be diverted by future development into a future detention fucility. These corrections have been included in the revised drainage report. The routing has been updated to account for the area of the pond and for Drainage Area "8". Note that Drainage Area "8" drains to the existing flume undetained. This is shown in the routing hydrograph and has no impact on the overall analysis. The proposed spot elevation for the detention pond shown on Plan Sheet 5 was labeled incorrectly. The correct elevation should be 304 .85 which will provide 2% drainage into the flume. Also, the proposed flume from the pond outfull device will connect to the existing concrete channel. The existing elevation of the flume at the connection point is 303.23 which is shown in the profile view. Should you have questions or need additional information, please do not hesitate to call. Sincerely #.iL.,~ Chie.fi:>esign Engineer Attachments 1722 Broadmoor, Suite 210 • Bryan, Texas 77802 • (409) 776-6700 • FAX (409) 776-6699 Drainage Report FOR Edelweiss Estates Phases VICINITY MAP NTS March, 1999 Revised April, 1999 Prepared By: McClure Engineering, Inc. 1722 Broadmoor Drive, Suite 210 Bryan, Texas 77802 ( 409) 776-6700 CERTIFICATION I, Joel J . Mitchell, Registered Professional Engineer No. 80649 , State of Texas , certify that this report for the drainage design for EDELWEISS ESTATES, PHASE 15-B , was prepared by me in accordance with the provisions of the City of College Station Drainage Policy and Design Standards for the owners thereof DRAINAGE REPORT ~~''''"~. ~-· -~E.OF T. ·~, ;' ~"',,~······f~~ \\ ~ft PL 9 1 •.. * .... ri•. . ~ 2 .. : .............. ·... I J. Mitchell, P.E. No. 80649 B JOEL J. MITCHELL · Z,···~················ . ~-..~ 80649 <:) :t:e§ •• ~..C:.•~G1 s~t'~ *"«I .-iii' , •. ~~·· ····~c§ _, '~IONAL € JI" '"'''~· EDELWEISS ESTATES, PHASES 14-A AND 15-B INTRODUCTION TABLE OF CONTENTS EDELWEISS ESTATES PHASES 14-A AND 15-B GENERAL LOCATION AND DESCRIPTION FLOOD HAZARD INFORMATION PRIMARY DRAINAGE BASIN DESCRIPTION DRAINAGE FACILITY DESIGN DRAINAGE DESIGN CRITERIA CONCLUSION EXHIBITS FEMA FLOOD INSURANCE RATE MAP EXCERPT DRAINAGE AREA MAP -EXISTING CONDITIONS DRAINAGE AREA MAP -PROPOSED CONDITIONS RATIONAL FORMULAS DRAINAGE AREA CALCULATIONS INLET COMPUTATIONS PIPE SIZE CALCULATIONS PROPOSED DETENTION POND ROUTING PROPOSED DETENTION POND HYDROGRAPHS PROPOSED DETENTION POND STAGE/STORAGE AND STAGE/ DISCHARGE CURVES DRAINAGE REPORT EDELWEISS ESTATES, PHASES 14 -A AND 15-B 1 1 1 2 2 2 4 "A" "B-1" "B-2" "C -1" "C-2" "C-3" "D-1" "D-2" "D-3" ii DRAINAGE REPORT ·EDELWEISS ESTATES PHASES 14-A AND 15-B INTRODUCTION: The purpose ofthis report is to study the effects of the development of Phases 14-A and 15-B of Edelweiss Estates. The parameters used for design and the existing conditions of the on-site area are incorporated to show how the final drainage design will accomplish the desired drainage objectives per the City of College Station Drainage Policy and Design Standards (DPDS.) GENERAL LOCATION AND DESCRIPTION: The 11.58 acre site is located in Edelweiss Estates, north of Rock Prairie Road. The property is bounded by Edelweiss Estates Phases 15-A and 12 to the east and south respectively. The property is bounded to the east by future phases of Edelweiss Estates and is bounded to the north by Southwood Valley Section 24C. The site is mostly open with a few wooded areas. The site is gently rolling with an average slope of 2.0% to 2.5%. FLOOD HAZARD INFORMATION: This property is not in a 100-Year Flood Hazard Area according to the Flood Insurance Rate Maps for Brazos County, Texas and Incorporated Areas, effective July 2 1992, prepared by the Federal Emergency Management Agency for the City of College Station (See Exhibit "A"). DRAINAGE REPORT EDEL WEISS EST A TES, PHASES 14-A AND 15-B PRIMARY DRAINAGE BASIN DESCRIPTION: The site naturally drains to the north. Along the Southwood Valley property line , a channel has been excavated to direct runoff to an existing concrete flume located between Southwood Valley and Fraternity Row. The existing concrete flume discharges into Bee Creek Tnbutary "A". DRAINAGE FACILITY DESIGN: Storm water from the site will be captured in the curbs and gutters and conveyed by RCP storm drain to the detention facility . The detention facility will be located in the north part of the site . Storm water from the detention facility will be discharged into the existing concrete channel which will convey the storm water to Bee Creek Tributary "A". The point where the flow exits the proposed detention facility will serve as Study Point # 1 for this project. Exlubit "C-1" shows the rational calculations for the various drainage areas corresponding to the Drainage Area Maps (Exlubits B-1 and B-2). Exlubit "C-2" shows the inlet computations. Exlubit "C-3" shows the pipe size calculations for the storm drain. Note that the proposed conditions drainage area (Exhibit B-2) is smaller than the existing conditions drainage area (Exlubit B-1). The drainage area is decreased because a portion of the area to the east is diverted by Phases 12 and 15 -A to an existing detention facility and a portion of the area to the west will be diverted to a future facility. Runoff from the lots adjacent t o Southwood Valley will not be controlled by the detention facility . This area is shown as drainage area "8" on Exhibit B-2 and is included in the pond routing hydrograph. DRAINAGE DESIGN CRITERIA: All drainage is in accordance with the City DPDS . The design rainstorm is the 10 year event . DRAINAGE REPORT 2 EDELWEISS ESTATES , PHASES 14-A AND 15-B Flow calculations for all drainage areas are based on the Rational Method. Manning 's Roughness Coefficient "n" is 0.014 per the DPDS. The storage volume required for the detention pond is based on a triangular hydrograph routing of the flows (base= 3* Tc). The detention pond serves to detain all design storms. Exhibit "D-1" shows the routing and hydrograph plots for the 5, 10, 25, 50, and 100 year events at Study Point #1. The discharge for the proposed detention facility will be metered to not exceed the requirement that 1/3 of the 5 year event be contained by the existing concrete flume. The capacity of the existing concrete flume is approximately 9 cfs. 1be following summary table shows the Pre-development and Post-development flows at the study point. Study Point #1 (Outlet of Detention Facility) Design Event Pre-Development Post-Development Water Surface Elev. Qs= 37 cfs 12 cfs 307.2 Q10= 42 cfs 15 cfs 307.4 Q25= 48 cfs 19 cfs 307.6 Qso= 55 cfs 23 cfs 307.9 Q100= 62 cfs 29 cfs 308 .1 Top of Berm= 309.00 The pond outfall device is a 12" diameter RCP with a 15' concrete overflow weir at an elevation of 307.50'. DRAINAGE REPORT 3 EDELWEISS ESTATES , PHASES 14-A AND 15-B CONCLUSION: The Post-development flow is reduced below the Pre-development flow for the 5, I 0, 25 , 50 , and I 00 year events. The I 00 year event is contained in the pond and released through the pond outlet device . A third of the 5 year event is contained within the existing concrete flume . The drainage design for this site meets the requirements as stated in the City of College Station Drainage Policy and Design Standards. DRAINAGE REPORT 4 EDELWEISS ESTATES, PHASES 14-A AND 15-B / / ZONE X / EXHIBIT A Flood Insurance Rate Map Excerpt Brazos County, Texas and Incorporated Areas Map Numbers: 48041C0182C Effective Date: July 2 , 1992 \ _\ Sc al e : 1" = 2 00' DRAINACB ARBA JIAP EXISTlNG CONO/TlON EXHIBIT B-1 ./ / r I / I I I t I I I I I I J I I J I ( I I \ I { \ ) ) I /' I I / / I / I f I I / / I I I I I I I \ \ ) / r r / / I { I I / ( \ \ / I ~ ) / / / I I / / / / / Scale : 1" 200' DRAINAGE AREA I/AP PROPOSED CONDITION EXHIBIT 8-2 EXHIBIT C-1 Rational Formula Drainage Area Calculations Edelweiss Estates Phases 14-A and 15-B ct ~ ~ w 0 0 0 > > ~ w ~ ~ > > ct ct a.. <i. LL. LL. 0 0 w w 0 -I-0 0 ~ ~ ~ ~ 1-z ctz z u.. u.. >-<!> ct w z w u ct:c ct ~:c ~ !::: I I ~ ~ > ~ :E ~~I-~ WI-W U ~ 1~ -ct Wet - W ct ~(!) ~~I-(!) I-~ 0 · I ct 1-ow If) > 1-wz w~ 1-z 1-~ ~ u w c 1 ~ o z~ w ct o >w > =>w =>ct w iii If) N '° c ' o 1-=>ct~ a.. 1-o~ o~ <!>~ <!>u.. > u =>I~ lol !!? lol =le ; I '° ,0 '° N 0 : '° ~ 0 !!? !O NO. IAC. I 0.41 0.551 0.91 ltt. ltt. ltt. lft. lftls I min I min I in/Hr lcfs lln/Hr lcfs lin/Hr lcfs lin/Hr lcfs-1Tn7Rr icfs fin/Hr lets 1....-U7 0,00 U7 0,00 075f 290,0 8.0 451.0 8.6~1,8 7.0 7,0 -7.34 5:-5 --8,91 6,7 9,9 7,5 1U 8,5 12,7! 9,6 ~ 10,8 2 1.42 0,00 1.42 0,00 0,781 306,0 9.0 454,0 8,0 1,8 7,1 7,1 7.29 5,7 8,8 6.9 9,8 7,7 11.2 8,8 12,7! 9,9 14,2 11,1 -----1--· + ! . ----3.. 1, 16 0,00 u 6 o.oo 0,64 ! 659,0 1 o.o 190,0 1,0 1,0 14,9 14,9 5,21 3,3 6.41 4.1 7.2 4,6 8,3 5,3 9.41 6,0 10,6 6,7 1--·----·-·-F---·-f--·-· ----·--~--_, ___ ....... ---· --~---;::\l"-·-t-· ··-·-·· -· 4 1,71 0,00 U1 0,00 094, 294,0 10.0 466,0 12.0 2,0 6,2 6.2 7,66 7,2 9,21 8,7 10,3 9,7 1U 11,01 132, 12,4 14,8 13,9 _ 5-~ __ !_:§_9 o,oo 159 ooo o.871265,o 6.o 466,0j 12.0 1.8 6,6 6.6 7.49 6,6 9,0 7.9 10.1 8,8 11,5mft13,oj11.3_ 14,5 1,27 6A 099 000 0,99 000 054l 606,0 120 1810 2.7 1,2 11.4 11.4 5,96 3,2 7,3! 4,0 8.2 4.4 9,3 5,1i 10,6! 5,7 11,9 6,5 --------->-------~ ------. ! . +--· -:-+-·--1 ·-----;-~_B _ 20_~ O,OQ 106_Q.:,QQ_!~~~ ?~7~_20~9_~104~ 1.4 1,2 12.0 12.0 5,82 6,6 7,1; 8.:.!__8.0 9,1 9,1 10,'4--1Jl~1_!_,7 _]_~,~2.:~ _-7~~::.-~~,_ _ _2:_oo -~J_~ __ 9-:..~9. QJ_~ _ _?o,q_-2:.~~1814_2.? __ 1_.o ,__ 1.7 5,o 8,?~ _ _Q.9 --~'~h!,o 11.0 1.1 12:~~~~J_~J.1_J_ 5 --~~~ -~ _?EVt0,3~ _Q;_QQ,_0,38 0,00 02~ 20,0 0,2 104,o.J-.~-· 1,7 1.2 5,0 8,22. u 9,9 2,1 11,0 2,3 12,5 2,6! 14,1;~9 __ 15,8 :u 8 uo 0,00 uo 0,00 0,72 134,0 2,0 412.01 4,0 1,5 6.1 6,1 7.70 5.5 9,3 6,6 10,3 7.4 11,8 8.4' 13,3! 9,5 14,9 10.6 EX _!~-16,-92 o.oo o,9__g_ 67~127.§: _ _o_32:.9. 102:r=o1 1,0 1,2 .199 19,9 4.45.30.1 5.5 37,2 6.2 42.2 7,1 48,3 8,1;549 -~2 6fQ -----· i : ------p------>----->---__ _J_ ! ----·---·---· ~----+-·-, -·----i------~ L---·-f--+-·-·---+-_j_ --.. :~==---------· ! ---t---= ----. --r-,_ ---·-4/14/99 9827-dra,xls Exhibit C-1 ~ . C.!l 0 ~i ~< 2 3 4 5 6A 6B 7A 7B = ~ ""' < ~ ~ 0 ~ 'i: .5 ~ = > ""' o~ 0 = ~ ""' = ~ CD = = ·; ""' ~ cfs 3 I 7.5 3 I 7.7 6B I 4.6 6B I 9.7 6B I 8.8 NA I 4.4 NA I 9.1 NA I I.I NA I 2.3 ""' ~ > 0 t' ""' = u 0 0.0 0.0 2.8 0.0 0.0 0.0 0.0 0.0 0.0 -~ = ~ -= 0 -= -0 ~ 7.5 7.7 7.4 9.7 8.8 4.4 9.1 I. I 2.3 .c -"O ~ -~ ~ ""' -00 28 28 28 28 28 28 28 28 28 EXHIBIT C-2 INLET COMPUTATIONS Edelweiss Estates Phases 14A and 158 -~ ~ .!: 00 -"O ,e ~ e"' i..-·s ~ C" c. ~ 0 ~ 00 0.8% 0.9% 0.8% 1.4% 1.1% 0.3% 1.2% 0.0% 0.1% 0 z ~ = ~ ~ = ~ -= 0 -= -0 ~ 1 I 7.5 2 I 7.7 3 I 7.4 4 I 9.7 5 I 8.8 6 I 13.5 7 I 3.4 DESCRIPTION Recessed Inlet on Grade Recessed Inlet on Grade Recessed Low Point Inlet Recessed Low Point Inlet Recessed Low Point Inlet Recessed Low Point Inlet Recessed Low Point Inlet ~ ~ ""' ~ ~ ~ -0 C" ~ ~ "O ~ "O ·;;: 0 ""' ~ ~ Curb Inlet cfs I ft I ft 0.62112.071 10 0.62112.441 10 2.331 3.171 5 2.33 I 4.15 I 5 2.33 I 3.78 I 5 2.331 5.791 10 2.3311.471 5 ""' .c . ~ -~ > c. . 0 ~ 00 >. ~ t ,_. "O ~ ""' ~ . = "O ~ u § < 0 ~ u "O ~ ""' ... = C" ~ = ~ ""' < Grate Inlet "O ~ "O ·;;: 0 ""' ~ = ~ ""' < ft I cfs I sq-ft I sq-ft 1.3 1.5 0 0 0 0 0 0 0 3/4/99 9827-dra.xls Exhibit C-2 0 < E--4 u z ~ g ~ E--4 ~ g 0 0 E--4 E--4 # # Ac. 1 2 0 .8 2 3 1.5 3 68 2 .2 4 5 0 .9 5 68 1.8 68 78 5 .7 78 HW 6 .0 EXHIBIT C-3 PIPE SIZE CALCULATIONS Edelweiss Estates Phases 14A and 158 c Oil ·r;; c « ~ Oil « e ~ ·-~ ~ "J c. c. i.. ~ "J ·-0 "O ~ ~ ~ 0 ~ -.... .... "O c. i.. 00 00 "J ... ~ ~ ~ = = ~ = :oi .... """ 0 Oil "J « 0 ... ~ it; .:; it; it; .... ... 0: CJ "J = 0 "O 0 0 0 ... t:S CJ ~ -<~ ~ i.. E--4 ~ ;:J ~ z ~ 00 min yr cfs cfs # cfs Ofo " 7 .0 10 7.5 9 .3 1 9 .3 0 .91 18 7 .1 10 15 .1 18 .9 1 18 .9 0 .80 24 14.9 10 15 .7 15 .7 1 15 .7 0 .30 27 6 .2 10 9 .7 12 .1 1 12 .1 0 .33 24 6 .6 10 18 .3 22 .9 1 22 .9 1.18 24 16.1 10 39.4 39.4 1 39 .4 1.06 30 16.2 10 41.4 41 .4 1 41.4 1.18 30 *Includes 25% Flow Increase for pipe sizes <2T' dia . -See Plan & Profile for pipe slope used (Pipe slope >or= Friction slope) ~ ~ ~ z ~ ~ ~ fps I 5 .3 31 6 .0 39 3.9 290 3 .8 31 7 .3 41 8 .0 31 8.4 28 ~ e ... "O E--4 E--4 c ~ ; ~ -~ @ ~ s i.. CJ ~ E--4 E--4 min min I I 0 .10 7 .07 0 .11 7.20 1.23 16 .10 0 .13 6.34 0 .09 6 .69 0 .06 16 .17 0 .06 16.22 3/23/99 9827-dra.xls Exhibit C-3 D.A. # D.A. # 'It: J: c Q. w I! z g> iii .. "O ~ "O c: >-0 8 J: Q. Qp 38.9 Tc 16.2 inc 2.0 Time cfs cfs 0.0 0.0 0.0 2.0 4.8 4.8 4.0 9.6 9.6 6.0 14.4 14.4 8.0 19.2 19.2 10.0 24.0 24.0 12.0 28.8 28.8 14.0 33.6 33.6 16.0 38.4 38.4 18.0 36.8 36.8 20.0 34.4 34.4 22.0 32.0 32.0 24.0 29.6 29.6 26.0 27.1 27.1 28.0 24.7 24.7 30.0 22.3 22.3 32.0 19.9 19.9 34.0 17.5 17.5 36.0 15.1 15.1 38.0 12.7 12.7 40.0 10.3 10.3 42.0 7.9 7.9 44.0 5.5 5.5 46.0 3.1 3.1 48.0 0.7 0.7 50.0 0.0 0.0 52.0 0.0 0.0 54.0 0.0 0.0 56.0 0.0 0.0 58.0 0.0 0.0 60.0 0.0 0.0 62.0 0.0 0.0 64.0 0.0 0.0 66.0 0.0 0.0 68.0 0.0 0.0 70.0 0.0 0.0 72.0 0.0 0.0 74.0 0.0 0.0 76.0 0.0 0.0 PEAK FLOWS 38 38 0.00 indicates inital condition EXHIBIT "D-1" PROPOSED DETENTION POND ROUTING Edelweiss Estates Phases 14-A and 15-B Pond Routing EVENT= 5 D.A.# c: a + c: c: ~ 0 ..... a ;:; + ~ .... c: + ..... "O ~ + c: + C: GI ~ ~ c: 0-c: a 0.. w co 6.6 6.1 cfs cfs cfs cfs ft cfs 4.81 0.00 0.00 0.00 303.5 0.0 14.42 0.00 4.81 3.22 304.0 2.2 24.03 7.11 14.42 3.65 304.2 4.3 33.64 22.32 31.13 4.41 304.5 6.5 43.25 45.05 55.96 5.46 305.0 5.6 52.86 76.79 88.29 5.75 305.2 4.5 62.47 117.38 129.64 6.13 305.4 3.4 72.08 166.65 179.84 6.59 305.7 2.3 75.20 224.60 238.73 7.07 306.0 1.3 71.11 285.12 299.80 7.34 306.3 0.2 66.31 341.06 356.23 7.59 306.5 0.0 61.50 391.73 407.37 7.82 306.6 0.0 56.70 437.20 453.24 8.02 306.8 0.0 51.89 477.50 493.90 8.20 306.9 0.0 47.09 511.25 529.39 9.07 307.0 0.0 42.28 537.69 558.34 10.33 307.1 0.0 37.48 557.44 579.97 11.27 307.2 0.0 32.67 571.09 594.92 11.91 307.2 0.0 27.87 579.17 603.77 12.30 307.2 0.0 23.06 582.16 607.04 12.44 307.2 0.0 18.26 580.50 605.22 12.36 307.2 0.0 13.45 574.60 598.76 12.08 307.2 0.0 8.65 564.82 588.05 11.62 307.2 0.0 3.84 551.50 573.47 10.98 307.2 0.0 0.72 534.95 555.35 10.20 307.1 0.0 0.00 516.99 535.68 9.34 307.1 0.0 0.00 499.93 516.99 8.53 307.0 0.0 0.00 483.47 499.93 8.23 307.0 0.0 0.00 467.17 483.47 8.15 306.9 0.0 0.00 451.00 467.17 8.08 306.8 0.0 0.00 434.98 451.00 8.01 306.8 0.0 0.00 419.10 434.98 7.94 306.7 0.0 0.00 403.37 419.10 7.87 306.7 0.0 0.00 387.77 403.37 7.80 306.6 0.0 0.00 372.31 387.77 7.73 306.6 0.0 0.00 356.99 372.31 7.66 306.5 0.0 0.00 341.80 356.99 7.59 306.5 0.0 0.00 326.76 341.80 7.52 306.4 0.0 0.00 311.84 326.76 7.46 306.4 0.0 12 307.2 7 c w II) ..JO < 0.. I-0 g !i: cfs 0.00 5.39 7.99 10.91 11.05 10.26 9.56 8.94 8.32 7.51 7.59 7.82 8.02 8.20 9.07 10.33 11.27 11.91 12.30 12.44 12.36 12.08 11.62 10.98 10.20 9.34 8.53 8.23 8.15 8.08 8.01 7.94 7.87 7.80 7.73 7.66 7.59 7.52 7.46 12 D.A. # >< w 37.2 19.9 cfs 0.0 3.7 7.5 11.2 15.0 18.7 22.5 26.2 30.0 33.7 37.1 35.2 33.4 31.5 29.6 27.7 25.9 24.0 22.1 20.2 18.4 16.5 14.6 12.7 10.9 9.0 7.1 5.3 3.4 1.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 37 9827-dra.xts Exhibit D-1 (!) ..J z < I= I-!!? g~ cfs 0.00 3.75 7.49 11.24 14.98 18.73 22.48 26.22 29.97 33.72 37.10 35.23 33.35 31.48 29.61 27.73 25.86 23.99 22.11 20.24 18.37 16.49 14.62 12.75 10.88 9.00 7.13 5.26 3.38 1.51 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 37 D.A. # D.A.# :it: .t= c Q. w <'Cl z .. Cl e iXi "C :E "C c: >. 0 0 J: c. u Qp 44.0 Tc 16.2 inc 2.0 Time cfs cfs 0.0 0.0 0.0 2.0 5.4 5.4 4.0 10.9 10.9 6.0 16.3 16.3 8.0 21.7 21.7 10.0 27.1 27.1 12.0 32.6 32.6 14.0 38.0 38.0 16.0 43.4 43.4 18.0 41.5 41.6 20.0 38.8 38.8 22.0 36.1 36.1 24.0 33.4 33.4 26.0 30.7 30.7 28.0 28.0 28.0 30.0 25.2 25.2 32.0 22.5 22.5 34.0 19.8 19.8 36.0 17.1 17.1 38.0 14.4 14.4 40.0 11.7 11.7 42.0 9.0 9.0 44.0 6.2 6.2 46.0 3.5 3.5 48.0 0.8 0.8 50.0 0.0 0.0 52.0 0.0 0.0 54.0 0.0 0.0 56.0 0.0 0.0 58.0 0.0 0.0 60.0 0.0 0.0 62.0 0.0 0.0 64.0 0.0 0.0 66.0 0.0 0.0 68.0 0.0 0.0 70.0 0.0 0.0 72.0 0.0 0.0 74.0 0.0 0.0 76.0 0.0 0.0 PEAK FLOWS 43 43 0.00 indicates inital condition EXHIBIT "D-1" PROPOSED DETENTION POND ROUTING Edelweiss Estates Phases 14-A and 15-B Pond Routing EVENT= 10 D.A. # c: a ~ c: c: 0 .... q + .... ;:; c: 32 + .... "C <'Cl + c: + c: > ~ ~ a 0 .!! .E c. w CXI 7.4 6.1 cfs cfs cfs cfs ft cfs 5.43 0.00 0.00 0.00 303.5 0.0 16.28 0.00 5.43 3.25 304.0 2.4 27.14 8.81 16.28 3.74 304.2 4.8 37.99 26.70 35.95 4.62 304.6 7.3 48.85 53.62 64.70 5.54 305.1 6.2 59.70 90.71 102.47 5.88 305.3 5.0 70.56 137.76 150.41 6.32 305.6 3.8 81.42 194.61 208.32 6.85 305.9 2.6 84.94 261.56 276.03 7.23 306.2 1.4 80.33 331.42 346.51 7.55 306.4 0.2 74.90 396.07 411.75 7.84 306.7 0.0 69.47 454.78 470.98 8.10 306.9 0.0 64.05 506.56 524.25 8.85 307.0 0.0 58.62 548.89 570.61 10.86 307.2 0.0 53.19 582.59 607.51 12.46 307.2 0.0 47.76 608.40 635.78 13.69 307.3 0.0 42.34 627.02 656.16 14.57 307.4 0.0 36.91 639.06 669.35 15.15 307.4 0.0 31.48 645.10 675.97 15.43 307.4 0.0 26.05 645.66 676.58 15.46 307.4 0.0 20.63 641.22 671.72 15.25 307.4 0.0 15.20 632.20 661.84 14.82 307.4 0.0 9.n 619.02 647.40 14.19 307.3 0.0 4.34 602.02 628.79 13.38 307.3 0.0 0.81 581.54 606.36 12.41 307.2 0.0 0.00 559.61 582.35 11.37 307.2 0.0 0.00 538.85 559.61 10.38 307.1 0.0 0.00 519.89 538.85 9.48 307.1 0.0 0.00 502.58 519.89 8.66 307.0 0.0 0.00 486.10 502.58 8.24 307.0 0.0 0.00 469.n 486.10 8.17 306.9 0.0 0.00 453.58 469.n 8.09 306.9 0.0 0.00 437.54 453.58 8.02 306.8 0.0 0.00 421.64 437.54 7.95 306.7 0.0 0.00 405.88 421.64 7.88 306.7 0.0 0.00 390.26 405.88 7.81 306.6 0.0 0.00 374.78 390.26 7.74 306.6 0.0 0.00 359.43 374.78 7.67 306.5 0.0 0.00 344.23 359.43 7.60 306.5 0.0 15 307.4 7 c w "' ..J 0 c:( c. I-0 ~ g: cfs 0.00 5.67 8.58 11.89 11.78 10.92 10.15 9.47 8.64 7.74 7.84 8.10 8.85 10.86 12.46 13.69 14.57 15.15 15.43 15.46 15.25 14.82 14.19 13.38 12.41 11.37 10.38 9.48 8.66 8.24 8.17 8.09 8.02 7.95 7.88 7.81 7.74 7.67 7.60 15 D.A. # I< w 42.2 19.9 cfs 0.0 4.2 8.5 12.7 17.0 21.2 25.5 29.7 34.0 38.2 42.0 39.9 37.8 35.7 33.5 31.4 29.3 27.2 25.1 22.9 20.8 18.7 16.6 14.4 12.3 10.2 8.1 6.0 3.8 1.7 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 42 9827-dra.xls Exhibit D-1 Cl ..J z c:( I= I-!:!? ~~ cfs 0.00 4.24 8.49 12.73 16.98 21.22 25.47 29.71 33.96 38.20 42.03 39.91 37.79 35.67 33.54 31.42 29.30 27.18 25.06 22.93 20.81 18.69 16.57 14.44 12.32 10.20 8.08 5.96 3.83 1.71 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 42 D.A. # D.A. # ~ .c. c Q, w Ill ... z g> iii ... "O ::!! "O c >. 0 8 J: 0.. Qp 50.3 Tc 16.2 inc 2.0 Time cfs cfs 0.0 0.0 0.0 2.0 6.2 6.2 4.0 12.4 12.4 6.0 18.6 18.6 8.0 24.9 24.9 10.0 31.1 31.1 12.0 37.3 37.3 14.0 43.5 43.5 16.0 49.7 49.7 18.0 47.5 47.5 20.0 44.4 44.4 22.0 41.3 41.3 24.0 38.2 38.2 26.0 35.1 35.1 28.0 32.0 32.0 30.0 28.9 28.9 32.0 25.8 25.8 34.0 22.7 22.7 36.0 19.6 19.6 38.0 16.5 16.5 40.0 13.4 13.4 42.0 10.3 10.3 44.0 7.1 7.1 46.0 4.0 4.0 48.0 0.9 0.9 50.0 0.0 0.0 52.0 0.0 0.0 54.0 0.0 0.0 56.0 0.0 0.0 58.0 0.0 0.0 60.0 0.0 0.0 62.0 0.0 0.0 64.0 0.0 0.0 66.0 0.0 0.0 68.0 0.0 0.0 70.0 0.0 0.0 72.0 0.0 0.0 74.0 0.0 0.0 76.0 0.0 0.0 PEAK FLOWS 50 50 0.00 indicates inital condition EXHIBIT "D-1" PROPOSED DETENTION POND ROUTING Edelweiss Estates Phases 14-A and 15-B Pond Routing EVENT= 25 D.A. # c a + c c 32 0 .... ~ + .... :;::: c + .... "O Ill + 32 c + c > C/j ~ c 0 .!! ..E N a 0.. w °' 8.4 6.1 cfs cfs cfs cfs ft cfs 6.22 0.00 0.00 0.00 303.5 0.0 18.65 0.00 6.22 3.28 304.0 2.8 31.08 10.96 18.65 3.84 304.3 5.5 43.51 32.24 42.03 4.90 304.8 8.3 55.94 64.47 75.75 5.64 305.1 7.1 68.37 108.31 120.41 6.05 305.4 5.7 80.80 163.55 176.68 6.56 305.7 4.4 93.23 230.16 244.35 7.09 306.1 3.0 97.27 308.50 323.39 7.44 306.3 1.6 91.98 390.15 405.n 7.81 306.6 0.2 85.n 465.84 482.13 8.15 306.9 0.0 79.55 531.54 551.61 10.03 307.1 0.0 73.34 585.86 611.09 12.62 307.3 0.0 67.12 629.79 659.20 14.71 307.4 0.0 60.91 664.22 696.91 16.34 307.5 0.0 54.69 690.00 725.13 17.57 307.5 0.0 48.48 707.86 744.69 18.42 307.6 0.0 42.26 718.49 756.33 18.92 307.6 0.0 36.05 722.52 760.75 19.11 307.6 0.0 29.83 720.53 758.57 19.02 307.6 0.0 23.62 713.04 750.36 18.66 307.6 0.0 17.40 700.52 736.65 18.07 307.6 0.0 11.19 683.41 717.92 17.25 307.5 0.0 4.97 662.11 694.60 16.24 307.5 0.0 0.93 636.99 667.08 15.05 307.4 0.0 0.00 610.36 637.92 13.78 307.3 0.0 0.00 585.19 610.36 12.58 307.3 0.0 0.00 562.21 585.19 11.49 307.2 0.0 0.00 541.22 562.21 10.49 307.1 0.0 0.00 522.05 541.22 9.58 307.1 0.0 0.00 504.55 522.05 8.75 307.0 0.0 0.00 488.06 504.55 8.25 307.0 0.0 0.00 471.71 488.06 8.17 306.9 0.0 0.00 455.50 471.71 8.10 306.9 0.0 0.00 439.44 455.50 8.03 306.8 0.0 0.00 423.52 439.44 7.96 306.7 0.0 0.00 407.75 423.52 7.89 306.7 0.0 0.00 392.11 407.75 7.82 306.6 0.0 0.00 376.61 392.11 7.75 306.6 0.0 19 307.6 8 c w C/j ...I 0 <( 0.. ... 0 g g: cfs 0.00 6.04 9.36 13.17 12.76 11.79 10.92 10.07 9.04 8.03 8.15 10.03 12.62 14.71 16.34 17.57 18.42 18.92 19.11 19.02 18.66 18.07 17.25 16.24 15.05 13.78 12.58 11.49 10.49 9.58 8.75 8.25 8.17 8.10 8.03 7.96 7.89 7.82 7.75 19 D.A. # >< w 48.3 19.9 cfs 0.0 4.9 9.7 14.6 19.5 24.3 29.2 34.1 38.9 43.8 48.2 45.8 43.3 40.9 38.5 36.0 33.6 31.2 28.7 26.3 23.9 21.4 19.0 16.6 14.1 11.7 9.3 6.8 4.4 2.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 48 9827-dra.xls Exhibit D-1 (!) ...I z <( I= ... !:!? g~ cfs 0.00 4.87 9.73 14.60 19.47 24.33 29.20 34.06 38.93 43.80 48.19 45.76 43.33 40.89 38.46 36.03 33.59 31.16 28.73 26.29 23.86 21.43 18.99 16.56 14.13 11.69 9.26 6.83 4.39 1.96 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 48 D.A. # D.A. # :ii: .c. c Q. w res z ... ei ai 'C :E 'C c: >. 0 8 J: Q. Qp 57.1 Tc 16.2 inc 2.0 Time cfs cfs 0.0 0.0 0.0 2.0 7.0 7.0 4.0 14.1 14.1 6.0 21.1 21.1 8.0 28.2 28.2 10.0 35.2 35.2 12.0 42.3 42.3 14.0 49.3 49.3 16.0 56.4 56.4 18.0 53.9 53.9 20.0 50.4 50.4 22.0 46.8 46.8 24.0 43.3 43.3 26.0 39.8 39.8 28.0 36.3 36.3 30.0 32.8 32.8 32.0 29.2 29.2 34.0 25.7 25.7 36.0 22.2 22.2 38.0 18.7 18.7 40.0 15.1 15.1 42.0 11.6 11.6 44.0 8.1 8.1 46.0 4.6 4.6 48.0 1.1 1.1 50.0 0.0 0.0 52.0 0.0 0.0 54.0 0.0 0.0 56.0 0.0 0.0 58.0 0.0 0.0 60.0 0.0 0.0 62.0 0.0 0.0 64.0 0.0 0.0 66.0 0.0 0.0 68.0 0.0 0.0 70.0 0.0 0.0 72.0 0.0 0.0 74.0 0.0 0.0 76.0 0.0 0.0 PEAK FLOWS 56 56 0.00 indicates inital condition EXHIBIT "D-1" PROPOSED DETENTION POND ROUTING Edelweiss Estates Phases 14-A and 15-B Pond Routing EVENT= 50 D.A. # c: a + c: 32 c: 0 ..... ~ + ..... :;:::; c: + ..... 'C ~ + c: + C: GI l!.l l!.l a 0-c: Q. w "" 9.5 6.1 cfs cfs cfs cfs ft cfs 7.04 0.00 0.00 0.00 303.5 0.0 21.13 0.40 7.04 3.32 304.1 3.1 35.22 13.58 21.53 3.97 304.4 6.2 49.31 38.40 48.80 5.20 304.9 9.3 63.40 76.22 87.71 5.75 305.2 8.0 77.48 127.16 139.61 6.22 305.5 6.5 91.57 191.01 204.65 6.82 305.9 4.9 105.66 268.05 282.58 7.26 306.2 3.4 110.24 358.38 373.71 7.67 306.5 1.8 104.25 452.44 468.62 8.09 306.9 0.2 97.21 536.18 556.69 10.25 307.1 0.0 90.16 606.22 633.39 13.58 307.3 0.0 83.12 663.75 696.39 16.32 307.5 0.0 76.08 709.84 746.86 18.51 307.6 0.0 69.03 745.50 785.92 20.21 307.7 0.0 61.99 771.63 814.53 21.45 307.8 0.0 54.94 789.06 833.62 22.28 307.8 0.0 47.90 798.55 844.01 22.73 307.8 0.0 40.86 800.78 846.45 22.84 307.9 0.0 33.81 796.38 841.63 22.63 307.8 0.0 26.77 785.93 830.19 22.13 307.8 0.0 19.72 769.96 812.70 21.37 307.8 0.0 12.68 748.94 789.68 20.37 307.7 0.0 5.64 723.32 761.62 19.15 307.6 0.0 1.06 693.48 728.95 17.73 307.6 0.0 0.00 662.06 694.54 16.24 307.5 0.0 0.00 632.40 662.06 14.83 307.4 0.0 0.00 605.32 632.40 13.54 307.3 0.0 0.00 580.59 605.32 12.37 307.2 0.0 0.00 558.00 580.59 11.29 307.2 0.0 0.00 537.38 558.00 10.31 307.1 0.0 0.00 518.55 537.38 9.42 307.1 0.0 0.00 501.35 518.55 8.60 307.0 0.0 0.00 484.88 501.35 8.23 307.0 0.0 0.00 468.56 484.88 8.16 306.9 0.0 0.00 452.39 468.56 8.09 306.9 0.0 0.00 436.35 452.39 8.02 306.8 0.0 0.00 420.46 436.35 7.95 306.7 0.0 0.00 404.71 420.46 7.87 306.7 0.0 23 307.9 9 c w I/) ....I 0 < Q. I-0 e g: cfs 0.00 6.44 10.20 14.54 13.78 12.70 11.74 10.62 9.47 8.34 10.25 13.58 16.32 18.51 20.21 21.45 22.28 22.73 22.84 22.63 22.13 21.37 20.37 19.15 17.73 16.24 14.83 13.54 12.37 11.29 10.31 9.42 8.60 8.23 8.16 8.09 8.02 7.95 7.87 23 D.A.# ~ w 54.9 19.9 cfs 0.0 5.5 11.0 16.6 22.1 27.6 33.1 38.7 44.2 49.7 54.7 51.9 49.2 46.4 43.6 40.9 38.1 35.4 32.6 29.8 27.1 24.3 21.6 18.8 16.0 13.3 10.5 7.7 5.0 2.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 55 9827-dra.xls Exhibit D-1 (!) ....I z < I= I-~ e~ cfs 0.00 5.52 11.04 16.57 22.09 27.61 33.13 38.66 44.18 49.70 54.69 51.93 49.16 46.40 43.64 40.88 38.12 35.36 32.60 29.84 27.08 24.31 21.55 18.79 16.03 13.27 10.51 7.75 4.99 2.23 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 55 D.A. # D.A. # 'It: .c. 0 c. w "' ... z 8' iii ... "C ::?: "C c: >-0 8 ::c: Q.. Qp 64.3 Tc 16.2 inc 2.0 Time cfs cfs 0.0 0.0 0.0 2.0 7.9 7.9 4.0 15.9 15.9 6.0 23.8 23.8 8.0 31.8 31.8 10.0 39.7 39.7 12.0 47.7 47.7 14.0 55.6 55.6 16.0 63.5 63.5 18.0 60.8 60.8 20.0 56.8 56.8 22.0 52.8 52.8 24.0 48.8 48.8 26.0 44.9 44.9 28.0 40.9 40.9 30.0 36.9 36.9 32.0 33.0 33.0 34.0 29.0 29.0 36.0 25.0 25.0 38.0 21.0 21.0 40.0 17.1 17.1 42.0 13.1 13.1 44.0 9.1 9.1 46.0 5.2 5.2 48.0 1.2 1.2 50.0 0.0 0.0 52.0 0.0 0.0 54.0 0.0 0.0 56.0 0.0 0.0 58.0 0.0 0.0 60.0 0.0 0.0 62.0 0.0 0.0 64.0 0.0 0.0 66.0 0.0 0.0 68.0 0.0 0.0 70.0 0.0 0.0 72.0 0.0 0.0 74.0 0.0 0.0 76.0 0.0 0.0 PEAK FLOWS 64 64 0.00 indicates inital condition EXHIBIT "D-1" PROPOSED DETENTION POND ROUTING Edelweiss Estates Phases 14-A and 15-B Pond Routing EVENT= 100 D.A. # c: a + c: c: ~ .!2 .... a + ~ .... .... "Cl c: + + + c: c: ell ~ le c: 0-c: a Q.. w co 10.6 6.1 cfs cfs cfs cfs ft cfs 7.94 0.00 0.00 0.00 303.5 0.0 23.83 1.22 7.94 3.36 304.1 3.5 39.71 16.78 25.05 4.13 304.4 7.0 55.60 45.57 56.50 5.46 305.0 10.5 71.48 89.43 101.17 5.87 305.3 9.0 87.37 148.07 160.91 6.42 305.6 7.3 103.25 221.34 235.44 7.05 306.0 5.5 119.14 309.69 324.59 7.45 306.3 3.8 124.30 413.01 428.83 7.91 306.7 2.0 117.55 518.48 537.31 9.41 307.1 0.3 109.61 608.63 636.03 13.70 307.3 0.0 101.66 683.70 718.24 17.27 307.5 0.0 93.72 745.00 785.37 20.18 307.7 0.0 85.78 793.72 838.72 22.50 307.8 0.0 77.84 830.96 879.50 24.27 307.9 0.0 69.89 856.61 908.80 26.09 308.0 0.0 61.95 869.43 926.51 28.54 308.0 0.0 54.01 872.96 931.38 29.21 308.1 0.0 46.07 869.76 926.97 28.60 308.0 0.0 38.12 861.70 915.83 27.06 308.0 0.0 30.18 849.52 899.82 25.15 308.0 0.0 22.24 831.14 879.70 24.28 307.9 0.0 14.30 807.11 853.38 23.14 307.9 0.0 6.35 m.91 821.40 21.75 307.8 0.0 1.19 743.99 784.26 20.14 307.7 0.0 0.00 708.31 745.18 18.44 307.6 0.0 0.00 674.63 708.31 16.84 307.5 0.0 0.00 643.88 674.63 15.38 307.4 0.0 0.00 615.80 643.88 14.04 307.3 0.0 0.00 590.16 615.80 12.82 307.3 0.0 0.00 566.74 590.16 11.71 307.2 0.0 0.00 545.36 566.74 10.69 307.1 0.0 0.00 525.84 545.36 9.76 307.1 0.0 0.00 508.01 525.84 8.91 307.0 0.0 0.00 491.48 508.01 8.26 307.0 0.0 0.00 475.10 491.48 8.19 306.9 0.0 0.00 458.87 475.10 8.12 306.9 0.0 0.00 442.78 458.87 8.05 306.8 0.0 0.00 426.83 442.78 7.97 306.8 0.0 29 308.1 10 0 w CJ) ..J 0 < Q.. I-0 0 a:: I-Q.. cfs 0.00 6.85 11.11 15.93 14.87 13.67 12.56 11.22 9.93 9.69 13.70 17.27 20.18 22.50 24.27 26.09 28.54 29.21 28.60 27.06 25.15 24.28 23.14 21.75 20.14 18.44 16.84 15.38 14.04 12.82 11.71 10.69 9.76 8.91 8.26 8.19 8.12 8.05 7.97 29 D.A. # )( w 62.0 19.9 cfs 0.0 6.2 12.5 18.7 24.9 31.2 37.4 43.7 49.9 56.1 61.8 58.6 55.5 52.4 49.3 46.2 43.1 39.9 36.8 33.7 30.6 27.5 24.3 21.2 18.1 15.0 11.9 8.8 5.6 2.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 62 9827-dra.xls Exhibit D-1 (!) ..J z < I= I-!!? g~ cfs 0.00 6.24 12.47 18.71 24.95 31.19 37.42 43.66 49.90 56.13 61.77 58.65 55.53 52.41 49.29 46.17 43.05 39.94 36.82 33.70 30.58 27.46 24.34 21.22 18.11 14.99 11.87 8.75 5.63 2.51 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 62 ~ .!::!. a Edelweiss Estates Phases 14-A and 15-B 5 Year Event Hydrograph 45 .00 -..-----------------------------------------.. 40.00 35.00 - 30.00 25.00 20.00 - 15 .00 - 10.00 '>: '~,--~~~~~~~~- 5 .00 -', \.\. \. '\. o.oo_._----+-------+~~~~--i-~~~~--+-~~~-""--~~~~'+------+-------4 0 .00 10.00 20.00 30.00 40 .00 Time (min .) 50 .00 60.00 70.00 80 .00 --Pond --COMBINED 8 --TOTAL PROPOSED - - -TOTAL EXISTING 4/14/99 Exhibit D-2 Edelweiss Estates Phases 14-A and 15-B 10 Year Event Hydrograph 50.00 -.----------------------------------------, 45.00 40 .00 35 .00 30.00 ~ ~ 25 .00 a 20 .00 15 .00 - 10.00 - 5 .00 \.\. \.\. \.\. \. \. \. \. 0.00 -J-----i--------+-----+------+-------""----~'+-------+------1 0.00 10.00 20.00 30.00 40.00 Time (min.) 50 .00 60.00 70.00 80 .00 --Pond --COMBINED 8 --TOTAL PROPOSED - --TOTAL EXISTING 4/14/99 Exhibit D-2 Edelweiss Estates Phases 14-A and 15-B 25 Year Event Hydrograph 60 .00 -.--------------------------------------~ 50 .00 40 .00 -- ~ ~ 30.00 a 20 .00 10.00 '\ \. '\. "" "" \. \. \. \. o.oo.--------+-------+-----+-----4----__:::,..._ ___ ~,~---------------4 0.00 10 .00 20.00 30.00 40 .00 Time (min.) 50 .00 60.00 70.00 80 .00 --Pond --COMBINED 8 --TOTAL PROPOSED -- -TOTAL EXISTING 4/14/99 Exhibit D-2 ~ Edelweiss Estates Phases 14-A and 15-B 50 Year Event Hydrograph 60.00 ~-------------------------------------~ r, I \ '\ 50 .00 - 40 .00 - '\ '\ '\ '\ '\ ' ' ' ' ' ' ' ' ' ~ 30.00 ' ' a ' ' 20.00 - 10 .00 - ' ' ' ' 0.00 ------------+-----+------+------""------'-'"------+------I 0.00 10.00 20 .00 30.00 40 .00 Time(min.) 50 .00 60.00 70.00 80 .00 --Pond --COMBINED 8 --TOTAL PROPOSED ---TOTAL EXISTING 4/14/99 Exhibit D-2 ~ ~ a Edelweiss Estates Phases 14-A and 15-B 100 Year Event Hydrograph 70.00 -.------------------------------------------, 60 .00 - r, I \ '\ \ \ \ 50 .00 40.00 30.00 . 20 .00 10.00 \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ '\ \ \ ~ \ \ \ \ \ \ \ \ \ \ ' \. o .oo~----1------+~~~~-+~~~~-+-~~~_::,,"1-~~~~'+-~~---+-------l 0.00 10.00 20 .00 30 .00 40 .00 Time(min.) 50.00 60.00 70.00 80 .00 --Pond --COMBINED 8 --TOTAL PROPOSED - - -TOTAL EXISTING 4/14/99 Exhibit D-2 3 .000 2 .500 -2 .000 ~ u ~ "' Ol ~ 0 <n 1.500 1.000 0.500 303 304 305 Edelweiss Estates Phases 14A and 158 Stage-Storage Curve 306 307 308 309 Elevation (msl) 310 311 312 Exhibit D-3 325.000 300 .000 275.000 250 .000 225 .000 200.000 Cil -~ 17 5.000 II en ... I'll .c Ii! 150.000 i5 12 5 .000 100.000 75.000 50 .000 25.000 0.000 303.0 304 .0 305 .0 Edelweiss Estates Phases 14A and 158 Stage-Discharge Curve 306 .0 307 .0 308.0 309 .0 El evation (msl) 310.0 311 .0 312 .0 Exhibit D-3 ASll lit BROWNE ENGINEERING1 INC. E n K!neers and C onsult.ants P.O. Box 10838, College Station, Tex as 77842 May6, 1999 Veronica Morgan Asst. City Engineer City of College Station P.O. Box 9960 409-694-2123 Fax: 409-694-3694 College Station , TX 77842 Re : Plans Check for Edelweiss 15B Dear Ms. Morgan , I have reviewed the revised Edelweiss Estates, Phase 15B plans that were provided to me on Tuesday, May 4th . The plans include the revisions that were requested on the red lined set and are ready for acceptance. The revised drainage plan includes all the requested changes and necessary certifications. The engineers estimate was attached also. Elrey B . Ash Ash & Browne Engineering , Inc TO: Mr. Jeff Tondre Graduate Engineer RING, INC. McCLURE ENG/NEE 1722 Broadmoor, S Bryan, Texas 7 (409) 776-6700, Fax: (4 uite 210 7802 09) 776-6699 TRANSMITTAL LETTER te: 4/21/99 n: Proj. # CITY OF COLLEGE STATION Da Att R E: EDELWEISS ESTATES, PHASE 15-B We are sending you the following: ~ Attached D Under Separate Cover Via: D Invoice D Prints ~ Plans D Contractor Invoice D B id Books D Specifications D Change Order D Contracts D Other Copies Date No. Description 6 Sets of Constru ction Plans revised per City Staff comments 1 City Staff Red -Lined Set of Construction Plans 2 Copies of the Engineer's Construction Cost Estimate 2 Copies of the revised Drainage Report , plus red-lined comments These are transmitted as follows ~For Approval D Approved as Submitted 2 Sets to be approved and returned to me D For your use D Approved except as noted 4 Copies for your files D As Requested ~ Resubmitted after Revisions Corrected Prints --- D For Review Comments D Other REMARKS: The Development Permit has been sent to BEGONIA C ORPORATION for the Owner's signature and will be submitted as soon as it has been returned to me. COPY TO: SIGN ED:~ ::: R. McClure , P.E., RP.LS. President - " ~ r Drainage Report FOR Edelweiss Estates Phases VICINITY MAP NTS March, 1999 Prepared By: McClure Engineering. Inc. 1722 Broadmoor Drive. Suite 210 Bryan, Texas 77802 ( 409) 776-6700 -------------------- I I > • '7 ~_,,~f'~ ~ +;.. ~ Pl~ ~-1 s?/ao; ~~J - ~J?r:> o+ ~wo::> ~ ~{)/:JV'_l jJ/r S fa/ ~cj S?Oa .__ ~AO+ ::>t"?-1 + 5 ..J-~1 f-1'0 ~ ~~~4!Y".A -f-~...A~ ~ ~~""".' '">"f>,1fl0Ad L_g'o/ ~ t/O ~~od oJd Zb''J/ ·YO ~:;-~_,!(~ ~s'S~J' rd ~f,.j° ~ ~sod<Md -···",;"'! r:1-s':S. .... o::> s..,..,,..,,, ~"'.rw1f d,1 - #-. PRIMARY DRAINAGE BASIN DESCRIPTION: The site naturally drains to the north. Along the Southwood Valley property ~e , a channel has been excavated to direct runoff to an existing concrete flume located between Southwood Valley and Fraternity Ro w. The existing concrete flume discharges into Bee Creek Tributary "A". DRAINAGE FACILITY DESIGN: Storm water from the site will be captured in the curbs and gutters and conveyed by RCP storm drain to the detention facility. The detention facility will be located in the north part of the site. Storm water from the detention facility will be discharged into the existing concrete channel which will convey the storm water to Bee Creek Tnbutary "A". The point where the flow exits the proposed detention facility will serve as Study Point # 1 for this project. Exhibit "C-1" shows the rational calculations for the various drainage areas corresponding to the Drainage Area Maps (Exhibits B -1 and B-2). Exhibit "C-2" shows the inlet computations. Exhibit "C-3" shows the pipe {. ,J.,'~.· • ...s i 0 t size calculations for the storm drain. t-Jo l..-<-\--(.......\-~ Pr •f0 ''p''" tfr ..... , ..... se.. crrl-°'-15 Flow calculations for all drainage areas are based on the Rational Method. Manning 's Roughness Coefficient "n" is 0 .014 per the DPDS . The storage volume required for the detention pond is based on a triangular hydrograph routing of the flows (base = 3* Tc). The detention pond serves to detain all design storms. Exhibit "D-1" shows the routing and hydrograph plots for the 5, 10 , 25 , 50 , and 100 year DRAINAGE REPORT 2 EDELWEISS ESTATES, PHASES 14-A AND 15-B • events at Study Point # 1. The discharge for the proposed detention facility will be metered to not exceed the requirement that 1/3 of the 5 year event be contained by the existing concrete flume. The capacity of the existing concrete flume is approximately 9 cfs . The following summary table shows the Pre-development and Post-development flows at the study point. Study Point #1 (Outlet of Detention Facility) Design Event Qs= Q10= Q25= Qso= Q100= Pre-Development 37 cfs 42 cfs 48 cfs 55 cfs 62 cfs ~~~~......-~~~~~~-- Post-Development Water Surface Elev. \'?-H cfs 307.2 ~~~~--~~~~~~-- \ ( .14'cfs _).01;-3 307,4 ~~~~--~~~~~~-- \ °'l ~cfs ~ 3o7,(, ~~~~--~~~~~~-- -z,, 3 #f'cfs ~ 3o7.) ~~~~--~~~~~~-- 1. '1 zS cfs -l08:tr ~. I Top ofBerm = 309.00 -r1 L po· l ,....._,t.-h,.f/ cAe V,C f i's C\. \2,'' L n ~ 111 1 I 1 " "Cl' ...,.... D:,_ ,........,r«-r 1<.L f WI._._ C\ / !; ~ ,,,.. crl-+C CONCLUSION: The Post-development flow is reduced below the Pre-development flow for the 5, 10, 25, 50, and 100 year events. The 100 year event is contained in the pond and released through the pond outlet device. A third of the 5 year event is contained within the existing concrete flume. The drainage design for this site meets the requirements as stated in the City of College Station Drainage Policy and Design Standards. DRAINAGE REPORT 3 EDELWEISS ESTATES, PHASES 14-A AND 15-B i I Item No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Description Mobilization Prepare Work Area Earthwork 1.5" HMAC Surface Course Edelweiss Estates Phase 15B Engineer's Estimate April 1, 1999 Unit Paving Construction Lump Sum Lump Sum C.Y. S.Y. 6" Lime Stabilized Subgrade (6% dry lime by weight) S.Y. Extra Lime Ton 6" Crushed Limestone Base S.Y. Layback Curb and Gutter L.F. Concrete Apron, Type A S.F. 4" Sidewalk S.F Sidewalk Ramps S.F End of Road Markers Each Quan ti Unit Pri~ 1 1,000 .00 l 2,000.00 1,100 3.75 2,569 4.35 3,266 3.15 40 85.00 2,569 5.75 1,606 7.00 1,125 3.75 1,255 2.50 109 6.00 3 125 .00 Paving Subtotal Drainage Construction 12" Reinf. Concrete Pipe, Non-Structural Backfill L.F. 41 25.00 24" Reinf. Concrete Pipe, Structural Backfill L.F. 37 45.00 24" Reinf. Concrete Pipe, Non-Structural Backfill L.F. 33 38 .00 27" Reinf. Concrete Pipe, Structural Backfill L.F. 192 55 .00 30" Reinf. Concrete Pipe, Structural Backfill L.F. 31 62 .00 30" Reinf. Concrete Pipe, Non-Structural Backfill L.F. 17 57.00 Concrete Apron S.F. 1,125 3.75 Concrete Spillway S.F. 486 3.75 Concrete Flume S.F. 396 3.75 10' Curb inlet EACH 4 2,650.00 Dry Rip-Rap S.Y . 75 18.50 Plug for 27" RCP EACH l 100.00 Sloped Headwall for 30" RCP EACH l 1,000 .00 Sloped Headwall for 12" RCP EACH 2 450 :00 Inlet Protection EACH 5 80 .00 Silt Fence L.F. 470 2 .00 Construction Exit for Silt Control S.Y. I 7 .00 Fibennulch Seeding S.Y. 6,25 0 0 .25 Drainage Subtotal Page I of2 Total 1,000.00 2,000 .00 4,125.00 11,175.15 10,287.90 3,400 .00 14,771.75 11,242.00 4,218.75 3,137.50 654.00 375.00 66,012.05 1,025.00 1,665.00 1,254.00 10 ,560.00 1,922 .00 969 .00 4,218 .75 1,822.50 1,485.00 10,600 .00 1,387.50 100.00 1,000 .00 900 .00 400 .00 940.00 7.00 1,562.50 41,818.25 . ' Item No. 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 Edelweiss Estates Phase 15B Engineer's Estimate April 1, 1999 Description Unit Water Line Construction 8" PVC Water Line, Non-Structural Backfill L.F . 6" PVC Water Line, Structural Backfill L.F. 6" PVC Water Line, Non-Structural Backfill L.F . Fire Hydrant Assembly, Type II EACH 8" Gate Valve EACH 8"x 13" Anchor Coupling EACH 8"x 6" Tee EACH 6" Gate Valve EACH 6"x 13" Anchor Coupling EACH 2" Blow-Off Assembly EACH Remove blow-off and connect to existing water line EACH 1.5" Type K Copper Water Ser.~ IO ft . (4' length) EACH 1.5" Type K Copper Water Ser.> 10 ft. (43' avg. Ieng EACH Trench Safetv (water line) L.F. Quan ti Unit Pri1 300 15 .00 137 23 .00 435 15 .00 I 1,800.00 1 612.00 1 180.00 1 200.00 1 412 .00 I 98 .00 2 500 .00 1 300.00 1 400.00 4 800 .00 240 1.00 Water Line Subtotal Sewer Line Construction 6" PVC, ASTM D-3034, structural backfill L.F. 239 18 .50 6" PVC, ASTM D-3034, non-structural backfill L.F . 608 14 .00 6" PVC, ASTM D-2241, structural backfill L.F. 40 32.00 Standard Manhole, 5-8 ft. deep EACH 1 1,300 .00 Standard Manhole, 10-12 ft. deep EACH 2 1,700.00 Connect to Existing Manhole EACH I 500.00 6" Sewer Clean-Out EACH I 250.00 4" PVC Sewer Service,~ 10 ft., (6.4 ft . avg. length) EACH 5 300.00 4" PVC Sewer Service,> IO ft., ( 58 .9 ft. avg. length) EACH 5 1,050.00 Trench Safety (sewer line) L.F. 885 1.50 Sewer Line Subtotal Total Construction Cost Page 2 of2 Total 4,500.00 3,151.00 6,525.00 1,800.00 612 .00 180.00 200 .00 412 .00 98 .00 1,000.00 300.00 400.00 3,200.00 240 .00 18,118.00 4,421.50 8,512 .00 1,280.00 1,300.00 3,400.00 500.00 250.00 1,500 .00 5,250.00 1,327 .50 27,741.00 $153,689.30 Item No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Description Mobilization Prepare Work Area Earthwork 1.5" HMAC Surface Course Edelweiss Estates Phase 15B Engineer's Estimate April 1, 1999 Unit Paving Construction Lump Sum Lump Sum C.Y. S.Y. 6" Lime Stabilized Subgrade (6% dry lime by weight) S.Y. Extra Lime Ton 6" Crushed Limestone Base S.Y. Layback Curb and Gutter L.F . Concrete Apron, Type A S.F. 4" Sidewalk S.F Sidewalk Ramps S.F End of Road Markers Each Quan ti Unit Pri 1 1,000.00 1 2,000 .00 1,100 3.75 2 ,569 4.35 3,266 3.15 40 85.00 2,569 5.75 1,606 7.00 1,125 3.75 1,255 2 .50 109 6 .00 3 125.00 Paving Subtotal Drainage Construction 12" Reinf. Concrete Pipe, Non-Structural Backfill L.F. 41 25 .00 24" Reinf. Concrete Pipe, Structural Backfill L.F . 37 45.00 24" Reinf. Concrete Pipe, Non-Structural Backfill L.F. 33 38.00 27" Reinf. Concrete Pipe, Structural Backfill L.F. 192 55.00 30" Reinf. Concrete Pipe, Structural Backfill L.F. 31 62.00 30" Reinf. Concrete Pipe, Non-Structural Backfill L.F. 17 57.00 Concrete Apron S.F. 1,125 3.75 Concrete Spillway S.F. 486 3.75 Concrete Flume S.F. 396 3.75 l O' Curb inlet EACH 4 2,650.00 Dry Rip-Rap S.Y . 75 18 .50 Plug for 27" RCP EACH l 100 .00 Sloped Headwall for 30" RCP EACH l 1,000.00 Sloped Headwall for 12" RCP EACH 2 450 :00 Inlet Protection EACH 5 80.00 Silt Fence L.F. 470 2.00 Construction Exit for Silt Control S.Y. l 7.00 Fibermulch Seeding S.Y . 6,250 0.25 Drainage Subtotal Pagel of2 Total 1,000.00 2,000.00 4 ,125 .00 11,175.15 10,287.90 3,400.00 14,771.75 11,242.00 4,218.75 3,137.50 654 .00 375.00 66,012.05 1,025 .00 1,665.00 1,254.00 10,560.00 1,922 .00 969 .00 4 ,218 .75 1,822.50 l ,485.00 10 ,600.00 1,387.50 100.00 1,000.00 900 .00 400.00 940.00 7.00 1,562.50 41,818.25 Item No. 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 Edelweiss Estates Phase 15B Engineer's Estimate April 1, 1999 Description Un it Water Line Construction 8" PVC Water Line, Non-Structural Backfill L.F. 6" PVC Water Line, Structural Backfill L.F . 6" PVC Water Line, Non-Structural Backfill L.F. Fire Hydrant Assembly, Type II EACH 8" Gate Valve EACH 8"x 13" Anchor Coupling EACH 8"x 6" Tee EACH 6" Gate Valve EACH 6"x 13" Anchor Coupling EACH 2" Blow-Off Assembly EACH Remove blow-off and connect to existing water line EACH 1.5" Type K Copper Water Ser. S IO ft . (4' length) EACH 1.5" Type K Copper Water Ser.> IO ft. (43' avg. lengi EACH Trench Safety (water line) L.F. Quan ti Unit Pri 300 15 .00 137 23.00 435 15.00 I 1,800.00 I 612.00 I 180.00 I 200.00 I 412 .00 I 98 .00 2 500.00 I 300.00 I 400.00 4 800.00 240 1.00 Water Line Subtotal Sewer Line Construction 6" PVC, ASTM D-3034, structural backfill L.F. 239 18.50 6" PVC, ASTM D-3034, non-structural backfill L.F . 608 14.00 6" PVC, ASTM D-2241, structural backfill L.F. 40 32.00 Standard Manhole, 5-8 ft. deep EACH I 1,300.00 Standard Manhole, I0-12 ft. deep EACH 2 1,700.00 Connect to Existing Manhole EACH I 500 .00 6" Sewer Clean-Out EACH l 250.00 4 " PVC Sewer Service, S IO ft ., (6.4 ft . avg. length) EACH 5 300.00 4" PVC Sewer Service,> IO ft., ( 58.9 ft. avg . length) EACH 5 1,050 .00 Trench Safetv (sewer line) L.F. 885 1.50 Sewer Line Subtotal Total Construction Cost Page 2 of2 Total 4,500 .00 3,151.00 6,525.00 1,800 .00 612.00 180.00 200 .00 412.00 98 .00 l,000 .00 300.00 400.00 3,200.00 240.00 18,118.00 4,421.50 8,512.00 1,280 .00 1,300.00 3,400.00 500.00 250.00 1,500.00 5,250.00 1,327.50 27,741.00 $153,689.30 1'6·*(. ~rJ : FOR OFFICE USE ONLY DATE~~~~-----.__ ____ _ COlllGl STAJION DEVELOPMENT PERMIT MINIJ\1UM SUBMITf AL REQUIREMENTS __ $100.00 Development Permit Application Fee. __ Drainage and erosion control plan, with supporting Drainage Report two (2) copies each. __ Notice oflntent (N.O.I.) if disturbed area is greater than 5 acres. LEGAL DESCRIPTION EDELWEISS ESTATES, PHASE 1 5-B APPLICANT (Primary Contact for the Project): Name BEGONIA (X)RPORATION, James O. Cro;vell, President Street Address 1901 San Jacinto City Houston, TX _______ _ State TX Zip Code 77002 E-Mail Address ------------ Phone Number ( 71 3) 654-0060 Fax Nwnber ( 713) 652-4926 PROPERTY OWNER'S INFORMATION: Name Sarne as above ----------------------------- Street Address -----------------City -------------- State Zip Code ______ E-Mail Address ------------------ Phone Number Fax Number ------------------------------ ARCIDTECT OR ENGINEER'S INFORMATION: Name Michael R. McClure, P.E., R.P.L.S., McCLURE ENGINEERING, INC. _______ _ Street Address ------------------City -------------- E-Mail Address -------------State ----Zip Code _____ _ Phone Number Fax Nwnber ------------------------------ Application is hereby made for the following development specific site/waterway alterations : Subdivi sion construction in the Bee Creek Tributary "A" drainage basin. -------- ACKNOWLEDGMENTS: I, James 0. Cro;vell, Pres. , ~owner, 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 pem1it application, I agree to construct the improvements proposed in this application ing to these documents and the requirements of Chapter 13 of the College Station City Code. v.~~ ---------------- operty Owner(s) James o. Cro;vell President DEVELOPMENT PERMI'BEGONIA (X)RPORATION DPERMIT .DOC Jn-4199 Contractor I of2 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 flOOO,ing from the 100 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 base flood elevation established in the latest Federal Insurance Administration Flood Hazard Study and maps, as amended. Engineer Date C. . . I, Michael R: McCl~e, P .~certify that ~e. a!terations o~ deve~opmen~ cove~ed by this~· diminish the flood-carrymg capacity of the waterway adJornrng or cross mg this perrmtted site and ~ ·~ development are consistent with requirements of the City of College Station City Code, Chapter l3J!R~ · ··.~ }~ encroachments of fl ways and of floodway fringes. f .t:.!. ....................... 9: •• 1! •• ~ • Date l MICHAEL R. McCLURE i! ~ .................................... , 'i~. • Q:-v. v,'b··~ 32740 Q/t'JI fq~··f.9tSTE~~··· ~ ~ lit .s's •••••••• ~<::> .. \ 10NAL ~~ - D. 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 . 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. DEVELOPMENT PERMIT DPERMIT.DOC 3n4/99 2 of2 NP DES f=ORM THIS FORM REPLA.CES PREVIOUS FORM 3510-6 (8-92} See Reverse for Instructions . Form Approved. OMB No. ~<Hl086 Approval expk .. : 8-31-QS OEPA United States Environmental Protection Agency Washington, DC 20460 Notice of Intent (NOi) for Storm Water Discharges ·Associated with Industrial Activity Under a NPDES General Permit Submission of ttis Notice of Intent constitutes notice that the party Identified In Section II of this fo~ intends to be authorized by a NPDES permit Issued for storm water discharges associated v.;ith industrial activity In the State identified in Section Ill of this form. Becoming a permittee obligates such discharger to comply with the~ and conditions of the permiL ALL NECESSARY INFORMATION MUST BE PROVIDED ON THIS FORM. . I. Permit Seledion: You must indicate the NPDES Storm Water general permit under which you are applying for coverage. Check one of these. :~:':~~ D ~~~i~~i on IZl . ~~~i~~~!~.) D .11. Facil.ity Operator information Name: I B.t:.~. o./.J 1 1 .Pr. .c..o 1R.1P1 o. e... A;T. I I Q1 t::l.1 I I I I I I I I I I Phone: lt1I131'1151'-l-I D1C>1 'G:.10 I 1 l 1Cf I 0 I I 1S1A1N1 1..J1A1C11 1N1T1C1 Status of [£] Address: I I I I I I I I I · I I I I I I I I Owner/Operator: City: I "'ff-'-'-1 D-'-'"-1 _1)~'~$'--'-1/,__._1_0~1._Al_,_1 __._1__._1_.1_._1 __._1 __._1__.1_1.__.._1 __._1__.1_1.__.._1 __._1__,I ·State: t:G1J . ZIP Code: r7 1710 101~1 -1 Ill. Facility/Site Locajion Information Name: I I Is the facility located on Indian Lands? (Y or N) Address: l.__~1_,__1_1..._~1_1..._~1__.1'--L'--'-l--'1'--L'--'-'--'l'--L1--'-1--'1.__~1__._1--'1.__~1__.1'--~1__._1_L1__._1_L1-'-1--'1'--~1__.1_L1_,I City: IC.1D1L1L.1€i61E1 I 51•1 J\i T1 I 101N1 I I I I I I I I State: IT1~l ZIP Code:l11?18._ 1(f.151 -1 Latitudt' !Cf 1~11 I ez11:2.. 191 Longitude: lei ~ 1 O I 41 O I 4 171 Quarter. LU Section: LU Township: I I I I I Range: I IV. Site Activity lnfocmaUon MS40peratocName: 1c.1 1,y;Y, ,01F 1 ,C.1 0,L.,t..,G,b1G', ,s;r 1 ~1T;1 10 1AJ, I I I I I ReceivingWaterBody: l8,E"1E"1 ,C.,R.,E',€"1~1 1T1R.1l 161U1T,A,R.1Y1 ,A, 1 1 I I I I If you are filing as a co-permittee, enter storm vr.t:.er general permit number: SIC or Designated Activity Code: Primary: IC,0 1 2nd: 1~1..__.1..__.,.__.I Is the facility rEqUired to submit monitori_ng data? (1, 2, 3, or 4) If You Have Arothe< Existing NPDES Permit, Enter Pem1it Number. I I I I I V. Additional lnbfmation Required for Construction Activities Only [LJ I Multi-Sector Permit Aopf!C!lnls Only; Based on the instructions provided in Addendum H of the Multi-Sector permit, are .species Identified in Addendum H in proximity to the storm water discharges to be covered under this permit, or the areas of BMP construction to control those storm water discharges? (Y or N) Will construction (land disturbing ae!Mties) be conducted for storm water controls? (Y or N) Is applicant subject to and in compliance with a written historic preservation agreement? (Y o< N) I I I I I I D D D I I Project Start Dale: Completion Date: Estimated Area to be Disturbed (in Acres): 151 Is the Storm Water Pollution Prevention Plan [] in cocnpliance with State and/or Local sediment and erosion plans? (Y or N) VI. Ce rtif teatiorc The certification statement in Box 1 ·applies to all applicants. The certification statement in Box 2 applies ~to facilities applying for the Multi-Sector storm water general permit BOX1 ..ALL APPLICANTS: I certify unde< pe_nalty of law that this document 3rld all attachments were prepared urot< my direction Qr ~upervisiqn in accordance wiih a system designed to assure that quaified personnel property gather and evaluate the infomiation submitted. Based on my inquiry of the person Of persoos who manage the system, or those persons directly responsible for gathering the inf<>mlation, the infomiation submitted is. to the best of my knowledge and belief. tr.:e, accurate, and complete . I am aware ~ there are significant penalties for submittill\; false information, including the possibility cl. fine and imprisonment for knowing violaioos- BOX2 MUL Tl-SECTOR STORM WATER GENERAL PERMIT APPLICANTS ONLY: I certify under penalty of law that I have read and understand the Part 1.8 . eligibility requiiemen\s for coverage under the Multi-Sector storm water general permit, including those requirements relating to the protection of species identified in Addendum H. ·I /: ,. To the best of my knowledge, the discharges covered under this permit. and construction of BMPs to control storm water run-otf, are not likely to and will not likely adversely affect any species identified in Addendum H of the Multi-Sector storm water general permit 0< are Olhe<wise eligible for coverage due to previous authorization under the Endangered Species Act. To the best of my knowledge, I further certify that such discharges. and construction of BMPs to control storm water run-otf, do not have an effect .on properties listed o< eligible for listing on the National Register of Historic Places under the National Historic Preservation Act, or are otherwise el igible for coverage due to a previous agreement under the Nationa: Historic Preservation Ac t. I understand that C:ontinued coverage under the Multi -Sector genera: pe rmit is contingent upon maintaining eligibility as provided for in Part l.B . Print Name: ,O, ,C,R,0,1..>, i:: L,L, I I I Dat e : / McCLURE ENGINEERING, INC. 1722 Broadmoor, Suite 210 Bryan, Texas 77802 (409) 776-6700, Fax: (409) 776-6699 TRANSMITTAL LETTER TO: Mr. Jeff Tondre, Graduate Engineer Development Services CITY OF COLLEGE STATION We are sending you the following: IZ! Attached Date: 4/27/99 Proj. # Attn: RE: EDELWEISS ESTATES, PHASE 15-B 0 Under Separate Cover Via: D Invoice 0 Prints D Plans D Contractor Invoice 0 Bid Books D Specifications D Change Order D Contracts IZ! Other Development Permit Copies Date No. Description 1 4/99 Development Permit Application 1 4/99 Copy of Completed N.0.1. 1 4/99 Dev elopment Permit Fee of $100.00 1 4/99 Subdivision Inspection Fee of $300.00 These are transmitted as follows IZ! For Approval D Approved as Submitted ---Sets to be approved and returned to me 0 For your use D Approved except as noted ---Copies for your files 0 As Requested 0 Resubmitted after Revisions Corrected Prints --- 0 For Review Comments D Other REMARKS: COPY TO : SIGNED:~ :l R. McClure , P.E., R.P .L.S. President