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HomeMy WebLinkAboutContract 53556 j s 0, 355(P DOE # RECEIVED STORMWATER FACILITY FEB 2 0 2020 MAINTENANCE AGREEMENT CITY OF FORT WORTH CITYSECRERRY THIS AGREEMENT, made and entered into this day of 61h of November, 2019, by and between Donald L. Siratt, III, acting by and through Montserrat Hills, LLC, hereinafter referred to as "Landowner", and the City of Fort Worth, hereinafter referred to as"City". WITNESSETH WHEREAS, the Landowner is the owner of certain real property described as an approximately 1.686 Acre tract located in the J. F. ELLIOTT Survey, Abstract 493 , Tarrant County, Texas according to the deed recorded in Instrument No. D219010528, Deed Records, Tarrant County, Texas,hereinafter called the "Property". WHEREAS, the Landowner is proceeding to build on and develop the Property according to the Site Plan/Subdivision Plan known as Montrachet hereinafter called the "Plan", which is expressly made a part hereof, as approved or to be approved by the City and the Landowner provides for management of Stormwater within the confines of the Property; and WHEREAS, the City and the Landowner, and their successors and assigns, agree that the health, safety and welfare of the residents of the City of Fort Worth, Texas require that on-site Stormwater Management Facilities be constructed and maintained on a portion of the Property; and WHEREAS, the City requires that on-site Stormwater Management Facilities ("Facility") as shown on the Plan be constructed and adequately maintained by the OFFICIAL RECORD CITY SECRETARY STORMWATER FACILITY MAINTENANCE AGREEMENT Rev.11/17/2016 FT. MATH,ATH,T Landowner, its successors and assigns, the location and dimensions of which is shown and more particularly described by metes and bounds in the attached Exhibit "A" ("Facility Propert)f"); and NOW, THEREFORE, in consideration of the foregoing premises, the mutual covenants contained herein, and the following terms and conditions, the parties hereto agree as follows: 1. The Landowner, its successors and assigns, shall adequately construct and maintain the on-site Stormwater Management Facility ("Facility") at no expense to the City of Fort Worth in accordance with the design specifications for the Facility, attached as Exhibit `B", and the current standards then in force and effect in the City of Fort Worth and with the Operations and Maintenance Plan attached to this Agreement as Exhibit "C". The Stormwater Facility includes all pipes, channels or other conveyances built to convey Stormwater to the facility, as well as all structures, improvements, and vegetation provided to control the quantity and quality of the Stormwater. Adequate maintenance is herein defined as good working condition so that these facilities are performing their design functions. The Stormwater Structural Control Maintenance Checklists, attached to this Agreement as Exhibit "D", are to be used to establish what good working condition is acceptable to the City. 2. The Landowner, its successors and assigns, shall inspect the Facility and submit an inspection report to the City annually. The purpose of the inspection is to assure safe and proper functioning of the Facility. The inspection shall cover the entire Facility, berms, outlet structure, pond areas, access roads, etc. Components of the Facility, which need maintenance or replacement to perform their design function, shall be noted in the inspection report along with the corrective actions to be taken. 3. The Landowner, its successors and assigns, hereby grant permission to the City, its authorized agents and employees, to enter upon the Property and to inspect the Facility Property whenever the City deems necessary. The purpose STORMWATER FACILITY MAINTENANCE AGREEMENT 2 Rev.11/17/2016 of inspection is to follow-up on reported deficiencies and/or to respond to citizen complaints. The City shall provide the Landowner, its successors and assigns, copies of the inspection findings and a directive to commence with the repairs if necessary. 4. In the event the Landowner, its successors and assigns, fails to maintain the Facility in good working condition as specified herein, the City, its authorized agents and employees, may enter upon the Facility Property and take whatever sus necessary to correct deficiencies identified in the inspection report and to charge the costs of such repairs to the Landowner, its successors and assigns. It is expressly understood and agreed that the City is under no obligation to routinely maintain or repair said Facility, and in no event shall this Agreement be construed to impose any such obligation on the City, such obligation is Landowner's. 5. The Landowner, its successors and assigns, will perform the work necessary to keep the Facility in good working order as appropriate. In the event the City pursuant to this Agreement, performs work of any nature, or expends any funds in performance of said work for labor, use of equipment, supplies, materials, and the like, the Landowner, its successors and assigns, shall reimburse the City upon demand, within thirty (30) days of receipt thereof for all actual costs incurred by the City hereunder. In the event that Landowner or its successors or assigns fail to pay the City for the costs incurred under this section, the City shall impress a lien for the costs of such work upon other lots owned by the Landowner. Such lien shall be perfected by filing in the office of the County Clerk of Tarrant County, Texas an affidavit identifying the property to be charged with such lien, stating the amount thereof, and making reference to this Agreement. 6. This Agreement imposes no liability of any kind whatsoever on the City. THE LANDOWNER AGREES TO HOLD THE CITY HARMLESS FROM ANY LIABILITY IN THE EVENT THE FACILITY FAILS TO OPERATE PROPERLY. LANDOWNER COVENANT AND AGREE AND DOES HEREBY INDEMNIFY, HOLD HARMLESS AND DEFEND STORMWATER FACILITY MAINTENANCE AGREEMENT 3 Rev. 11/17/2016 THE CITY OF FORT WORTH, ITS AGENTS, SERVANTS AND EMPLOYEES FROM AND AGAINST ALL COSTS, EXPENSES, LOSSES, DAMAGES, CLAIMS OR CAUSES OF ACTION WHATSOEVER ARISING, OR WHICH MIGHT ARISE, FROM THE FAILURE OF LANDOWNER OR ANY FUTURE OWNERS OF THE ABOVE FACILITITY PROPERTY TO MAINTAIN THE FACILITY, INCLUDING, BUT NOT LIMITED TO THE BED AND BANKS OF THE DETENTION POND; ANY DAMAGES CAUSED TO PERSON OR PROPERTY DUE TO (1) FLOODING OF THE POND AND ITS BANKS, (2) SLOPE FAILURE OF THE BANKS OF THE POND, OR (3) FAILURE OF THE POND OR ITS BANKS TO OPERATE IN A MANNER CONSISTENT WITH CITY OF FORT WORTH CRITERIA TO PERFORM ANY OTHER DUTIES OR OBLIGATIONS HEREUNDER. 7. Landowner covenants and agrees that no habitable building shall be erected within the drainage easement outlined on Exhibit "A" but this paragraph shall not preclude construction of other improvements within the drainage easement, which do not impede drainage. Landowner covenants and agrees that no habitable building shall be erected on the above property abutting such easement which shall have a finished floor at an elevation less than two feet above the maximum depth of water in the detention pond which would occur during a 100 year frequency flood. 8. This Agreement shall be recorded among the land records of Tarrant County, Texas, shall constitute a covenant running with the land, and shall be binding on the Landowner, its administrators, executors, assigns, heirs and any other successors in interests, including any property owners association. [SIGNATURE PAGE FOLLOWS] STORMWATER FACILITY MAINTENANCE AGREEMENT 4 Rev. 11/17/2016 Executed this.(Z day of -4�WV 2O8 Montserrat Hills, LLC City of Fort Worth i Name: Donald L. Pratt. Jesus J. Chapa Assistant City Manager Title: � /--�' Approved as to Form and Legality P�A A /I ssistant y tt ey FOPS, ST ;;` / gj. qity Secretary ............... E AL RECORECRETARY TH FT. WORTH, TX STORMWATER FACILITY MAINTENANCE AGREEMENT 5 Rev.11/17/2016 STATE OF TEXAS § COUNTY OF TARRANT § This instrument was acknowledged before me o by Jesus J. Chapa, Assistant City Manager of the City of Fort Viorth, on b alf of the City of Fort Worth. PPY•"„B ' MARIA S,SANCHEZ 2U•' * *= My Notary iD#2256490 �': •'ry Expires December 19,2021 No ry Public, State of Texas `'•'.,rF of•<'��"� STATE OF TEXAS § COUNTY OF TARRANT § Before me, the undersigned authority on this (�' " day of ktykL ew"e — 20 tq personally appeared known to me to be the person whose name is subscribed to the foregoing instrument and acknowledged to me that the same is the act of 5 P_r-r—,zL, 41115 L,L-G , and that he executed the same as its f-- and as the act of such and for the purposes and consideration xpressed in the foregoing instrument. ERNETTE G ANDRAE Notary Public, State of Texas Notary Public State of Texas %d • 'e;' My Commissiora#130588338 °P^` My Comm.Exp.March 18,2020 OFFICIAL RECO«E ' CITY SECREMN" FT. WORTH,7X STORMWATER FACILITY MAINTENANCE AGREEMENT 6 Rev.11/17/2016 Contract Compliance Manager By signing I acknowledge that I am the person responsible for the monitoring and administration of this contract, including ens png all pe A rmance and reporting requirements. Janie S V4orales Development Services Manager rCPS Via„c , FT '�7URTK"' k a(; EXHIBIT "A" INSERT LEGAL DESCRIPTION STORMWATER FACILITY MAINTENANCE AGREEMENT 7 Rev.11/17/2016 MONTRACHET DRAINAGE EASEMENT ACQUISITION C.P.# 102276; Parcel#DE-I DE-I 9190 CHAPIN RD. FORT WORTH,TEXAS. J. F. ELLIOTT SURVEY,A-493 EXHIBIT "A" REAL PROPERTY DESCRIPTION OF A VARIABLE WIDTH PRIVATE DRAINAGE EASEMENT BEING TWO PARCEL OF LAND SITUATED IN J. F. ELLIOTT SURVEY, ABSTRACT NUMBER 493, CITY OF FORT WORTH, TARRANT COUNTY, TEXAS, BEING A PORTION OF LOT B, BLOCK 10, MONTSERRAT ADDITION AS RECORDED IN CABINET A, SLIDE 11550, PLAT RECORDS, TARRANT COUNTY, TEXAS, AND PORTION OF THAT 40.001 ACRE TRACT OF LAND DESCRIBED BY DEED TO MONTSERRAT HILLS, LLC, AS RECORDED IN INSTRUMENT NUMBER D219010528, DEED RECORDS, TARRANT COUNTY, TEXAS, AND BEING MORE PARTICULARLY DESCRIBED BY METES AND BOUNDS AS FOLLOWS: PARCEL 12X: BEGINNING AT A 5/8 INCH IRON ROD WITH YELLOW CAP STAMPED "ANA" FOUND FOR THE SOUTHWEST CORNER OF SAID LOT B, AND THE SOUTHEAST CORNER OF SAID 40. 001 ACRE TRACT IN THE NORTH RIGHT-OF-WAY LINE OF TEAM RANCH ROAD (80' RIGHT-OF-WAY) , ALSO BEING THE BEGINNING OF CURVE TO THE LEFT; THENCE 109.70 FEET WITH THE ARC OF SAID CURVE TO THE LEFT AND SAID NORTH RIGHT-OF-WAY LINE THROUGH A CENTRAL ANGLE OF 00 DEGREES 32 MINUTES 48 SECONDS WITH A RADIUS OF 11499. 14 FEET, A TANGENT LENGTH OF 54 . 85 FEET AND A CHORD WHICH BEARS SOUTH 82 DEGREES 38 MINUTES 03 SECONDS WEST, 109.70 FEET; THENCE DEPARTING SAID NORTH RIGHT-OF-WAY LINE, NORTH 07 DEGREES 39 MINUTES 01 SECONDS WEST, 130.16 FEET; THENCE NORTH 42 DEGREES 14 MINUTES 58 SECONDS WEST, 23.06 FEET TO THE BEGINNING OF A CURVE TO THE LEFT AND THE SOUTHERLY RIGHT-OF-WAY LINE OF FUTURE LATOUR LN. ; THENCE 42.88 FEET WITH THE ARC OF SAID CURVE TO THE LEFT THROUGH A CENTRAL ANGLE OF 49 DEGREES 08 MINUTES 01 SECONDS WITH A RADIUS OF 50.00 FEET, A TANGENT LENGTH OF 41.58 FEET AND A CHORD WHICH BEARS NORTH 23 DEGREES 11 MINUTES 01 SECONDS EAST, 41.58 FEET; THENCE NORTH 88 DEGREES 37 MINUTES 01 SECONDS EAST, 175.06 FEET TO THE WEST LINE OF LOT 15, OF SAID BLOCK 10; THENCE SOUTH 00 DEGREES 04 MINUTES 51 SECONDS EAST, 168.34 FEET WITH THE COMMON LINE OF SAID LOT 10, AND SAID LOT B, TO THE BEGINNING OF A CURVE TO THE LEFT AND THE NORTH RIGHT- OF-WAY LINE OF SAID TEAM RANCH ROAD; THENCE 50.36 FEET WITH THE ARC OF SAID CURVE TO THE LEFT THROUGH A CENTRAL ANGLE OF 00 DEGREES 15 MINUTES 03 SECONDS WITH A RADIUS OF 11499.14 FEET, A TANGENT LENGTH OF 25.18 FEET AND A CHORD WHICH BEARS SOUTH 83 DEGREES 01 MINUTES 58 SECONDS WEST, 50.36 FEET TO THE POINT OF BEGINNING AND CONTAINING 30, 342 SQUARE FEET OR 0. 697 ACRES OF LAND MORE OR LESS. A.N.A. Consultants,L.L.C. Pagel of 2 5000 Thompson Terrace Colleyville,TX 76034 REVISION: 08-16-19 MONTRACHET DRAINAGE EASEMENT ACQUISITION C.P.# 102276;Parcel#DE-1 DE-1 9190 CHAPIN RD. FORT WORTH,TEXAS. J.F.ELLIOTT SURVEY,A-493 PARCEL 1X: CObMNCING AT A 5/8 INCH IRON ROD WITH YELLOW CAP STAMPED "ANA" FOUND FOR THE SOUTHWEST CORNER OF SAID LOT B, AND THE SOUTHEAST CORNER OF SAID 40.001 ACRE TRACT IN THE NORTH RIGHT-OF-WAY LINE OF TEAM RANCH ROAD (80' RIGHT-OF-WAY) ; THENCE SOUTH 81 DEGREES 24 MINUTES 56 SECONDS WEST, 598.72 FEET TO THE POINT OF BEGINNING ON THE NORTH RIGHT-OF-WAY LINE OF SAID TEAM RANCH ROAD AND THE BEGINNING OF A CURVE TO THE LEFT; THENCE 324.48 FEET WITH THE ARC OF SAID CURVE TO THE LEFT AND THE COMMON LINE OF SAID 40.001 ACRE TRACT AND SAID TEAM RANCH ROAD THROUGH A CENTRAL ANGLE OF 01 DEGREES 37 MINUTES 00 SECONDS WITH A RADIUS OF 11499.14 FEET, A TANGENT LENGTH OF 162.25 FEET AND A CHORD WHICH BEARS SOUTH 79 DEGREES 06 MINUTES 56 SECONDS WEST, 324.47 FEET; THENCE NORTH 56 DEGREES 54 MINUTES 44 SECONDS WEST, 14.19 FEET; THENCE NORTH 12 DEGREES 06 MINUTES 19 SECONDS WEST, 202.70 FEET; THENCE NORTH 32 DEGREES 53 MINUTES 41 SECONDS WEST, 14.14 FEET; THENCE NORTH 77 DEGREES 53 MINUTES 41 SECONDS EAST, 107 .87 FEET TO THE BEGINNING OF A CURVE TO THE RIGHT; THENCE 13.20 FEET WITH THE ARC OF SAID CURVE TO THE RIGHT THROUGH A CENTRAL ANGLE OF 00 DEGREES 46 MINUTES 33 SECONDS WITH A RADIUS OF 975.00 FEET, A TANGENT LENGTH OF 6.60 FEET AND A CHORD WHICH BEARS NORTH 78 DEGREES 16 MINUTES 58 SECONDS EAST, 13.20 FEET; THENCE SOUTH 10 DEGREES 46 MINUTES 32 SECONDS EAST, 141.89 FEET; THENCE NORTH 86 DEGREES 26 MINUTES 49 SECONDS EAST, 212.33 FEET; THENCE SOUTH 08 DEGREES 41 MINUTES 31 SECONDS EAST, 56.26 FEET TO THE POINT OF BEGINNING AND CONTAINING 43, 058 SQUARE FEET OR 0. 989 ACRES OF LAND MORE OR LESS. Note: Surveyed on the ground August 2019. Note: Bearings are relative to True North obtained from Global Positioning Satellite System (GPS) Observations, North American Datum 1983 (NAD 183) , Texas State Plane Coordinate System, North Central Zone. Description included herein and the Map of Survey attached herewith s G— •,% e. "....•ee•e000 •EDWARD K.KHALIL ..yr..u. a...............Y.. 5951 •�OFE 5 5 1 0�.•O v � 9ti0•S U - 41 i I -6, --1 11-1 A.N.A.Consultants,L.L.C. Page 2 of 2 5000 Thompson Terrace Colleyville,TX 76034 REVISION: 08-16-19 BLOCK 10 MONTSERRAT CAB.A,SLIDE NO.11550 15 P.R.T.C.T. Q=00°15'03" 13 14 168.34' �BIRF R=11499.14' 50'ACCESS AND UTILITIES EASEMENT S00°04'51"E L =50.36' c T=25.18' (H.O.A.)LOT B L.C.=S 83°01'58"W 50.36' POB Q=OO I32'48" R=11499.14' w PARCEL L =109,70' 12X T =54.85' L.C.=S 82'38'03"W N 109.70' CoCo Z 130.16' o 06 1407*39'01"W C;i ^� h� w Q=49"08'01" o Z a z R=50.00' L =42.88' T =22.86' L.C.=N 23'11'01" Scale 1"= 100' 41.58' w Quo Q, a �oQ J. IF. ELLOOTT SURVEY = a ABSTRACT No. 403 V � o > Q toCo a J J L O > 0 a N_ u. 0 x s m MONTSERRAT HILLS,LLC. C D219010528 p 56.26 D.R.T.C.T. Z SOF3'41'3i"E POB (40.001 AC) %IRS Exhibit B iSWM Plans .. FFE 806.13 rS :1 11 we :1. As :1 11 :1 11 ■■■■■■■■■■■■■■■■�■■■■■■■■■■■■■■■■■■■■■■■■■■■MINE■ : ■■■■■■■M■■■■■■E■■■■■■■■■■■■■■■E■M��IN�M■MIN■Mee■■■ ONSEN ME immi2awam MEN MEN PRELIMINARY FOR REVIEW ONLY �esnd cu ent3 are for Design Review ot Intended for Construdlion. idding or Pe it Purpose& They were prepo ed by.or under supervision of. Hog MONTRACHET IF FIRT-WIRTH TEXAS TRANSPIDI AND PUBLI� WORKS DEPT. ENGINEERING DIVISION A& 5OW Thompson Terrace --AX-.(8j7)n6-995S ■■■INE■■M■■■■■■A����fl■■■■■■■■�}����!■■I■■ISM■■■■MIN■E ■■MINE■M■■E��I .IN�'�i�i7'r��■■■��2�M■���■■■\■I�L•1/■■■■■■■IN■ ■■■■■E■■■■■��■MINss���e��eeeeszeesesl�s..M■c���■■■■■ ■■MM■■■■■■■M■MMM■■■MMIN■■■MM■■MM■■■■■MINE ■■■MM■E■■■■■■■■■■■■■■■■■■■■E■■■MINE■■■■■ : ■■M■M■MEMM■■■■■■■■M■■■■■■■■■M■■MINE■■M■■ ■■■■M■■■■■■■M■M■■■■■M■■■■■■MEIN■■■■■■■■■ I}. ,. �■�� `a • ■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■ ■■■■■■■■■■■■■■■��■�■■■■■■■■■�■■■■■■■ ■■■■■■ ■■■■■■�■■■■■■■■■■■■■■■■■■■■■■■■■■■■■ ENE on MEN iiiiiiiMO■i■iiii iiiiiiiiiiiiiiiii■■i=iiiiiii�■iiii�iiiiiiiiiiiiiiiii PRELIMINARY FOR RE�IEW ONLY ese documents re for Design Re�ie� ofid not Intended for Construction. ' ■■■■■■■■■■■■■■■■■■■[ tG�■■■Gi■■■■■11■■■■■■■■■ ■■■■■■■■■■■■■ � �■■■■■'JI■■■■■■■■■I�■■■■■■■■■ or mit Purposes. They�ere . .. . . . under super�ision of: NEEMEMEMEMERVEZIM IM ■■■■■■■■■nc■�■��iirriri>rr■iriir�i■lp"I1f „ins W ■■■■■■■■■��i■►�ilrii■■■■■■■■■■■■■;��■�i11b 1ii■■ MONTRACHET ■■■■■■■■■t!�■R■\■■■�1111lJI!!�!!.■■■■■■I�G�■I i 11�■1!!�■■ OF FORT WORTH, TEXAS MEE TRANSPORTATION AND PUBLIC WORKS DEPT. ■■■■■■ !��■I■n■n■■■I�■wnalnn■■■■■r�lr,;�n ���■■ ■■■■■■■■■---�il■■■■■�/!G�:ir .T.R. 5000 Thompson Ten-ace ii + *■■■■■ ENGINEERING DIVISION ■■■■■c■■■n� ::Lr�,� ls ,*nm�a �n■arr� :R'R■■■■n■ ■■■■■■lm-_s (817)335-9900 ■■■■■a■■■iiGila.:^_• ',D•■fiCfilWii■■i�4' HiI+Yl�ii(il�i■■■■ DETENTION POND PLAN&PROFILE ■■■■■■■■■m����',�■■ii�lldlfiiYiflii■■i■■■�i�EF■■■■■■■■ TABLE 1.2 1-YEAR DETENTION B SIN OUTLET CALCULATION Storage Volume a uired c- 11,014 1-1ear WSEL ft= 796.50 Storage Volume rovided a 104 401 See Table 1.1 Orifice 1 1-Year Depth(81=1 2.50 Orifice Flowline(ftiz 794.00 Critics Type-Rectangular Number of Orifices 1 TABLE 1.0 Width in- 24.00 DETENTION POND 1 STORAGE VOLUME Height in 22.00 MODIFIED RATIONAL METHOD Area s= 3.67 Existing Runoff Coefficient 0.30 Proposed Runoff Coefficient 0.53 Head Provided(ft)- 1.56 Area 29.37 Acres Area 21 86 Acres Orifice Coefficient 0.62 Time of Concetra8o 15 Min. Time of Conceiration 15 00 Min. 00" .ds 23.0 =Cd•A 2 H".5 a n.2.9 1 Year Runo 29.25 CFS 1 Year Runoff 38 66 FS 5 Year Runo 4.82 CFS 5 Year Runoff 0.00 FS .. cfs= 23.52 See Table 1.0 100 Year Runoff 63 78 CFS 100 Year Runoff 92 92 FS O,w cfs= 22.96 C6-..,,= �39 FS Bypass flow from DA:B-4&Inlets BI&B2 TABLE 1.3 FS Bypass flow from DA:B-4 6-YEAR DETENTION BASIN OUTLET CALCUTAII NS tb,.....w,= FS Bypass flow from DA,B-4 Storage Volume Re uired c- 27,401 7,40 5-Year L ft- 97.33 Storage ofume Provi ed c - 1 4 57 See Table 11 O--„= t4999 Fs able 5.15: or 1 Yr Retum Period:e=0.8217,b=43.653,d=8 Orifice 1 5-Year e h R 3.3 arrant 15: Orifice Flowfine ft= 794.00 0.�."..,= S tY or 5 Yr Retum Periotl:e=0.8142,b=71.154.d=12 Or�ce 7 = Circular Or..-- FS ainfa0 Data r 100 Yr Return Period,e=0.7790,b=110.20 d=1 Number of Orifices 1 Width in)- 24.00 Height n 22.00 T..=g22Min. able 118 or 1 YrRetum Period:a=95.84,b-13.43 Areas = 3.67 T.= Min, ainfall For 5 Yr Retum Periotl:a=170.81,b=19.44 Head Provided fl 2.41 T.,o,= Min, actors or 100 Yr Return Period,a=322,07 b=4 39 Orifice Coefficient o.62 on .cfs= 28.3 =Cd•A•2 H".5 eon.2.9 P. 2 49 n. P'.r 1.77 n. Weir 2 10D-Year Depth ft a 0.5 Pm= 2.79 in. P,m,= 2.95 n. Weir Flowline fl- 796A Weir Type=Rectangular Broad Crested Weir P.,� 3.14 'n. P,e,,,,= 5.44 In. Number of Orifices 1 Weir Width in- 16.00 C=(2/S)"(32)(9)"(12)= 309 V---,= P171�1514.61 u.Ft V...,= 11014.22 u.Ft Weir Height(in)- 6.36 V...�.,,= v.Ft V-.-- 27557.48 u.Fl r cfs- 5.5 O= LH"312 eon.2 16 V,. - u FI Vw.,<e= 1000 .90 v.Ff 34 42 0.�.,.cfs= See Table 1.0 TABLE 1.1 0-cfs= 33.85 DETENTION POND 1 TABLE 1.4 DETENTION BASIN VOLUME CALCULATIONS 10 YEAR DE ENTION BASIN OUTLET CALCULATION 100 YR Storage Req. 100,044.90 JCF h 00 YR WSEL a 799.86 FT Storage Volume Re fired D- 10045 0 100-Year WSEL fl 799.86 S YR storage Req. 27,557.48 CF 5 YR WSEL C=797.33 FT Storage Volume Provided 104.401 See Table 1 1 1 YR Storage Req.=1 11,014.22 ICF I 1 YR WSEL a 796.50 FT Orifice 1 100-Year Depth M14 5.86 EMERGENCY SPILLWAY FLOWLINE a 80. FT Orifice Flowline fl- 794,00 Pond Depth Post-Dev. Area G ElevationStorage Total Storage Emergency Orifice Type-Rectangular (ft) Elev.(ft) (sf) (ft) (cf) (cf) - Flow Out Flow out(cfs) Number of Orifices 1 7.0 801,0 38261 A 114.49 Width(in)-- 24.00 1.0 36264.5 140665.50 Height in 22.00 D 800.0 34268 0,00 50.36 Area s = 3.67 1.0 32,230.0 104 401.00 Head Provided fl- C(14 5.0 799.0 30192 44.25 0.00 Orifice Coefficient 0,62 1.0 28.2i6.od 72171.01) 00, -cfs= 40.6 Q=Cd*A*rf2a H".5 a n.2.9 4.0 798.0 6240 36.93 0.00 Orifice 2 iOD-Year De 1h R= .06 1.0 24,330.5 43,955.00 Orifice Flowline ffl= 796.8 3,0 797.0 22421 27.61 0.00 Orifice Type=Rectangular 1.0 11,210. 19.624.50 Number f Orifices 1 .0 796.0 12212 18,99 0,00 Width in= 16,00 1,0 7,260.00 8,414.00 Hei ht in= 10.00 1.0 795.0 2308 5.27 000 Areas 1.11 1.0 1 154.00 1 154.00 Head Provided ft= 2.64 0.0 1 794.0 1 0 D.00 0.00 Orifice Coefficient 0.62 Ow&.cfs- 9.0 =Cd'A' H".5 e n 2.16 'I O cfs= 49.99 See Table 1.0 ...Cfs= 4955 PRELIMINARY - FOR REVIEW ONLY These documents ore for Design Review and not intended for Construction. Bidding or Permit Purposes. They were prepared by. or under supervision of: OSAMA F.NASHED 90373 10/30/2019 Tpe ar Print Name PE/ Dale MONTRACHET CITY OF FORT WORTH. TEXAS TRANSPORTATION AND PUBLIC WORKS DEPT. ENGINEERING DIVISION 5000 Thompson Terrace Colleyville,TX.76034 TBPE FIRM p 20 (817)335-9900 FAX:(817)335.9955 DETENTION POND CALCULATIONS DESIGNED: ALS DATE I PROACT NO.I SHEET DRAWN: ALS Oct.19 CPN 10z227 63A CHECKED: OF11 I X-25098 TABLE 2.0 DETENTION POND 2 STORAGE VOLUME MODIFIED RATIONAL METHOD Existing Runoff Coefficient 0.30 1 Proposed Runoff Coefficient 0.53 Area 1612 Acres Area 14.25 Acres Time of Concetration 15 Min. Time of Concetration 15.00 Min. 1 Year Runoff 15.16 CFS 1 Year Runoff 25.19 CFS 5 Year Runoff 22.19 CFS 5 Year Runoff 36.67 CFS 100 Year Runoff 36.44 FS 100 Year Runoff 60.55 CFS Q,....,,= 2 82 CFS Bypass flow from DA:B-6 TABLE 2.1 Q.,...".,= 413 FS Bypass flow from DA:B-6 DETENTION POND 2 O.w-,.,= 678 FS Bypass flow from DA:B4 DETENTION BASIN VOLUME CALCULATIONS 100 YR Storage Req.- 70,035,15 CF 00 YR WSEL 789.90 0.......,,= 29tFS FS able 5.15: or 1 Yr Return Period:e=0.8217,b-43.653,d=8 5 YR Storage Req.= 22,347.39 CF 5 YR WSEL 786.68 anent Coun 1 YR Stange Req.- 8,892.04 CF 1 YR WSEL- 784.60 Q.,,...,,= FS N[or or 5 Yr Return Period:a=0.11 2.b-71.154,d=12 EMERGENCY SPILLWAY FLOWLINE- 720.00tT Q.d...,.,= ainfa0 Data 100 r Return Period:e= 7 98 b=1 10,202 d=14 Pond Depth Post-Dev. Area C Elevation Storage Total Storage Controlled Emergency (ft) Elev.Ill) (at) (ft) (of) (cf) Flow Out(cfs) Flow out(cfs) T.= 26 36 Min. able 1.18 or 1 Yr Return Period:a=95.84,b=13.43 9.0 791.0 23776 0.00 110.01 ainfall 1.0 2,595. 95,477.00 T.= 33.38 Min. or 5 Yr Return Period:a=170.81,b=19.44 8.0 790.0 21414 actors 0.00 2994 T..= 39.01 in. or 100 Yr Return eriod:a=322.07 b=24.39 1.0 0,068.0 72,882.00 7.0 789.0 18722 26.99 0 00 P.�g27;1n. P,a,= 1 77 n. 1.0 7.676.5 52.814.00 Pm= n. P-= 2.95 n. 6.0 788.0 16631 23.64 0.00 Pn. n. P,e,.= SA4 n. 1.0 8,315.50 35,137.50 5.0 787.0 14702 16.93 0.00 V- 3594.0 Cu.FI V- 8892.04 u.Ft 1.0 7.351.00 26.822,00 4.0 786.0 12879 14,7E 0.00 2925.1 u.Fl V,..,= 22347.39 u.Fl 1.0 6.439.50 19,471.00 V" - 2 60.1 Cu FI - 7081 8 u.Ft 3.0 785.0 11185 12.21 0.00 1.0 5,592.50 13.031.50 2.0 1 784.0 9563 8.96 0.00 TABLE 2.2 1 1.0 4,781.50 7,439.00 1-YEAR DETENTION BASIN OUTLET CALCULATIONS 1.0 783.0 5315 3.39 0.00 Store a Volume Re ired(cn=l 8.892 1-Year WS L ff 784.60 1 1.0 21657450 2,557.50 Storage Volume Provided - 95,477 See Table 2.1 0.0 782.0 1 0 0.00 1 0.00 Orifice 1 1-Year Depth(ffj=j 2.60 Orifice F o ine ft= 782.0 Orifice Type=Rectangular Number of Orifices 1 Width in= 12.00 Hei hl in= 20.00 Area s = 1 A7 Head Provided 11= 1.77 Orifice Coe icient 0.62 o, .cfs= 11.02 =Cd•A'2 H".5 eqn.2.9 Q.....cfs= 12•34 See Table 2.0 0..cfs= 11.02 TABLE 2.3 5-YEAR DETENTION BASIN OUTLET CALCULATIONS Storage Volume Re uired e = 22.347 5-Year WSE k= 786.68 Storage Volume Provided(cf)xI 95,477 Se Ta le 2.1 Orifice 1 5-7ear a th k= 4.68 Orifice Flowline k= 782.0 Orifice Type- Circular Number of Orifices 1 dth n= 12.00 Height in 20.00 Areas 1.67 Head Provided 3.85 Orifice Coefficient 0.62 nra cfs= 16.3 =Cd•A• 2 H"5 e n 2.9 Weir 2 100.Year a th k= 0 28 Weir Flowlina ff= 786.4 Weir Type Type=Rectangular Broad Crested Weir Number of Orifices 1 Weir Width in= 12.00 =(213)"(32)(g)"(12)= 3.09 Weir He'ht in= 336 Over ids). 1.59 =CLH"312 a n.2.16 0.,...cfs= 78•06 See Table 2.0 0...cfs= 17.85 TABLE2.4 PRELIMINARY - FOR REVIEW ONLY 100-YEAR DETENTION AS IN OUTLET CALCULATIONS These documents are for Design Review Store a Volume Re ired = 70.839 100.Vear WSEL fl 789.90 antl not Intended for Construction, Bidding or Permit Purposes. They were Store a Volume Provided(cf)--1 95,477 See Tab a 2. prepared by,or under supervision of: Orifice 1 100.Year Da fh k= 7 90 OSAMA F. NASHED 90373 10/30/2019 Orifice F o ine k- 782.0o Tpa ar P6M Hama PE I Dote Orifice TvDe=Rectangular Number of Orifices 1 Width in= 12.00 H'ht Vol- 20.00 Area S 1.67 MONTRACHET Head Provided k= 7.07 Orifice Coefficient 0.62 Clam-(cfs)- 22.0 =Cd•A' 2 H .5 son.2.9 Orifice 100.Year De th ft- 3.50 CITY OF FORT WORTH, TEXAS Orifire Flowline ff- 786.4 TRANSPORTATION AND PUBLIC WORKS DEPT. Orifice Tvpe-Rectangular ENGINEERING DIVISION Number of Orifices 1 50M Thompson Terrace Width m- 12.00 O Colleyville,TX.76034 Heiaht finl10.50 TBPE FIRM A 20 rea s = 0.88 (817)335-9900 Head Provided ff= 3.08 FAX:(817)335-9955 Orfice Coefficient 0.62 s 7.62 Q=CcrA'lf2aH)4.51 son.2.16 DETENTION POND CALCULATIONS ,,,jefsj= 29.6E See Tab e 2 0 DESIGNED: ALS I DATE I PROJECT NO.I SHEET 0...cfs= 29.66 DRA1lNH: Al5 la'N 102227 CHEIt(ED: OFN Oct.19 X-26098 63g 1FT FREEBOARD AND POND TOP EL=801.00' lOO YR.WSE=799.86 5 YR WSE_797.33 — — — — 16' b — — _ _ORIFICE 2 FL-796.80' 1 YR WSE=796.50 24" ORIFICE 1 FL=794.OV DETENTION POND 1 OUTLET STRUCTURE FACE NOT TO SCALE THE PROPOSED POND OUTLET STRUCTURES SHALL BE A CITY OF FORT WORTH STANDARD DROP INLET WITH LID PER DETAIL D408.THIS CAST IN PLACE STRUCTURE SHOULD BE MODIFIED APPROPRIATELY BASED ON THE ORIFICE OPENING DIMENSIONS PROVIDED ON THIS SHEET. THE BROAD CRESTED WEIR EQUATION WAS USED TO CALCULATE THE EMERGENCY SPILLWAY CAPACITY THE ISWM ISWM Technical Hydraulics Manual Section 2.2Outlet Structures 4,—mil Broad crested )(Eweir Equation !a �l It—�-9--�11 Q•C'L•(H"1.5)IE n.2.16) Cvalue from Table 24 Weir Breadth b= 10.80 It 18, Head(H)= 10D It A A Weir[oefFident C= L67 Hoe.Weir length= IB.IXI (t SECTION A—A 4ASlo eLen th- 4.OD ft Qout- 58.74 cfs t 4:1 SLOPE 1%SLOPE 4:1 SLOP TYp. TYP. PRELIMINARY — FOR REVIEW ONLY These documents are for Design Review and not Intended for Construction. Bidding or Permit Purposes. They.ere DETENTION POND 1 prepared by, under supervision of: OSAMA F. NASHED 90373 10/30/2019 EMERGENCY SPILLWAY Tye or Print Noma PE I Dote PLAN VIEW(NTS) 4 _TOP OF POND EL=801.00 M ONTRAC HET EMERGENCY SPILLWAY ~ 4:15LOP — BOTTOM EL=800.00 100 YR WSE=799.86 TYP _ — — — — — — — CITY OF FORT WORTH, TEXAS DETENTION POND 1 TRANSPORTATION AND PUBLIC WORKS DEPT. ENGINEERING DIVISION EMERGENCY SPILLWAY In, 5000 Thompson Terrace CROSS SECTION (NTS) �It� Colley F M#034 TBPE !/-t!\�f"Q FIRM#20 (817)335-9900 FAX:(817)335-9955 _TOP OF POND EL=801.00 DETENTION POND DETAILS � lO RAMP WIDTH 125' 4:1 SLOPE — ~ a:t anp� 7YP. — EL=799.50 — — — DESIGNED: ALS DATE PRQECT NO. SHEET TYP' DRAWN: AL9 LPN 10=7 CROSS SECTION A—A(NTS) CHECKED: OFN Oct. X-26098 64A IFf FREEBOARD EL AND POND TOPE 11.00' 100 YR WSE=789.90 12" 5 YR WSE=796.68 _ ut RIFICE 2 FL=7t40' 1 YR WSE=784.fi0 THE PROPOSED POND OUTLET STRUCTURES SHALL BE A CITY OF FORT WORTH STANDARD DROP INLET WITH LID PER DETAIL D408.THIS CAST IN PLACE 12" STRUCTURE SHOULD BE MODIFIED APPROPRIATELY BASED ON THE ORIFICE OPENING DIMENSIONS PROVIDED ON THIS SHEET. ORIFICE 1 FL=782.00' DETENTION POND 2 OUTLET STRUCTURE FACE NOT TO SCALE _� SEE NOTES FROM DETENTION POND 1 EMERGENCY� I' �l ' SPILLWAY CALCULATIONS FOR ALL ASSUMPTIONS USED ISWMTechnlol Hydraulics Manual Section 2.2 outlet Structures A 2S' A Broad Crested Weir Equation O-CrLr(He1.S)(Egn.2.161 �c C value from Table 24 Weir Breadth b• 10.70 It Head H= I LSECTION A-A WeirCoeHicientc- 2.67 ► Harz.Weir Length. I- 4:1 SLOPE 1%SLOPE 4:1 SLOP 4:1SlopeLen h• 4. fItt It TYP. i i NP' flout= 77.43 ds DETENTION PC?f,)D 2 EMERGENCY SPILWAY PLAN VIEW(NTS) 4 PRELIMINARY — FOR REVIEW ONLY _TOP OF POND EL=791.00 These documents are for Design Review and not Intended for Construction, EMERGENCY SPILLWAY Bidding or Permit Purposes. They were 4:1 SLOP BOTTOM EL=790.00 prepared by, or under supervision of: — — — — — — 1D0 YR WSE=789.90 OSAMA F. NASHED 90373 10/30/2019 DETENTION POND 2 Type or Print Noma PE if Dale EMERGENCY SPILLWAY CROSS SECTION (NTS) MONTRACHET 8:1 EL=601.00 SLOPE CITY OF FORT WORTH, TEXAS TRANSPORTATION AND PUBLIC WORKS DEPT. PROP ENGINEERING DIVISION RETAINING Q 5000 Thompson Terrace WALL TYP p Colleyville,TX.76034 1LG RAMP WIDTH TBPE FIRM 0 20 EL=799.50 (817)335-9900 FAX.(817)335-9955 PROP.RETAININGDETENTION POND DETAILS WALL TM. EL=791.DO DESIGNED: ALS DATE I PROJECT NO. SHEET CROSS SECTION B—B (NTS) CI SLOP DRAWN` ALS Oct.19 CPN 102n7 646 MAX CHECKED: OFN x-28098 h JIM x b g LL Y E` 'gn LL i. e Z g" $5 W a ©- u'I n g g 9=i � =J 2 € £ a Bt 133M 3m 3m HUM i I / •I I ! 0 d a a IMP e? 5s� N "g' - -� i • � i 3 4 8 g 3 q X g �W FED ' �4g"�s >Y�g g�i 's ='gy ,y� ,� i 1 i i I ( � � ' j ! ( •,; . ( ( � i `g "� ffi b oi g go ggg�6 2 { "�� I I ( i 1 ui Y e g v�� NFINI7�NJ UM I I` ;tq zy "" 3='- g> gg : " saeKT o4�4 a. 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'-i t'�-:r.^.•.-f HU s R, bo lt Eli, >1 1 g s a 'sq'r"Ia1k1 loaf <Ins »,11W gg :: G' rid rdd d:9 l= _ ��Ki S�i�P:�S7 �F IQ SQ `_.ri.� "'i:: ,:'.-:.•'�,._.i.'.�Ei;':y. 1 v1 r � Syr I '�•� '4^ - yri- sty: . .. 'r_.�'• :s I e --mks x a � to i s �� �• '�� t i9tS t � i x ^ AISIAHO IN I �� I} LU \tea. -o , l �= i`,i r z CL �U0 =P V a f �_' I, l OWmE < 1 7 Z ;�� V ? will , Z W W III WON " ` II� w - i O :ice ,;,,t ( , I 'il, �" `•, � sa�i s$:i lil I) ago o � � ' 1 U ;wm $- bK 3 / \ a ( zV \ 1 191 k\ Exhibit "C" CITY OF FORT WORTH STORMWATER FACILITY OPERATION AND MAINTENANCE PLAN The only responsibility the City of Fort Worth has in the operation and maintenance of this Facility is inspection. General Maintenance Procedures The structural and functional integrity of the Facility shall be maintained at all times by removing and preventing drainage interference, obstructions, blockages, or other adverse effects into, through, or out of the system. Periodic silt removal shall occur when standing water conditions occur or the pond's storage volume is reduced by more than 10%. Silt shall be removed and the pond/basin returned to original lines and grades shown on the approved engineering plans. In addition, corrective measures are required any time a basin does not drain completely within 72 hours of cessation of inflow. NO STANDING WATER IS ALLOWED in basins designed for dry detention purposes. Accumulated litter, sediment, and debris shall be removed every 6 months or as necessary to maintain proper operation of the basin. Disposal shall be in accordance with federal, state and local regulations. Detention facilities shall be mowed monthly between the months of April and October or anytime vegetation exceeds 12-inches in height. To prevent debris from entering and clogging the downstream storm sewer system a wire mesh screen or, similar screening device shall be installed over the outlet until final acceptance. 4. PREVENTIVE MAINTENANCE/INSPECTION • Visual inspections of all components will be conducted every 6 months. • A log shall be kept of maintenance actions, and inspections. The log should document the condition of the detention system's primary components, mowing, and silt, litter and debris removal dates. Document aeration of the basin bottoms and replanting to prevent the sealing of the basin bottom. • Written maintenance and repair records shall be maintained by the party or parties signing the attached Agreement and shall be provided to the City upon request. STORMWATER FACILITY MAINTENANCE AGREEMENT 8 Rev.11/17/2016 Exhibit "D" Stormwater Structural Maintenance CHECKLIST FREQUENT REPAIRS REPAIRS INSPECTION DATE REQUIRED MADE NOTES Mowing Remove Trash and debris Inspect irrigation system operation Remove grass clippings Violations Noted MINOR INSPECTION Condition of Pond Amount of silt in and Amount of silt in flume Amount of ponded water Amount of wetland vegetation Location of Erosion Percent of vegetation Condition of trash guard Location of Erosion MAJOR INSPECTIONS Condition of Stormwater Quality Structure Type of Stormwater Quality Structure Structure type and Condition Condition of Rip- Rap STORMWATER FACILITY MAINTENANCE AGREEMENT 9 Rev.11/17/2016 Condition of filtrations stem Berm or Embankment Settlement Location of erosion Evidence of Animals Evidence of Aquatic life Condition of Aeration Foundation STORMWATER FACILITY MAINTENANCE AGREEMENT 10 Rev.11/17/2016