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HomeMy WebLinkAboutContract 54657 10/13/2020 CSC No.54657 11:42 AM DOE # STORMWATER FACILITY MAINTENANCE AGREEMENT THIS AGREEMENT, made and entered into this day of October 8 2020 , by and between �CCI-54 BEACH RETAIL, LP acting by and through PAUL D. AGARWAL_, 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 40.828 acre tract located in the DAVID ODOM Survey, Abstract _1184 , Tarrant County, Texas according to the deed recorded in Volume �203177660 , 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 MOTOROLA ADDITION 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 STORMWATER FACILITY MAINTENANCE AGREEMENT CITY SECRETARY 1 Rev.12/29/2014 FT. WORTH, TX 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 Property"); 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.12/29/2014 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 steps 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.12/29/2014 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.12/29/2014 Executed this 8th day of October2020 Landowner CCI-54 BEACH RETAIL,LP City of Fort Worth Dana Burghdoff(Oc 8,2u2u�3T'DT] Name: PAUL 15. AGARWAL Dana Burghdoff Assistant City Manager Title: Manager of CCI-54 Beach Retail, LP Approved as to Form and Legality /444 lf�T+ q�44aa�Il� Assistant City Attorney � 0 o oo- ad p�'►a °o o ATTEST °ono osd QII as Oh o a*y°T°°°oo 5 op �OP.(?Oil� EXA by t°rR AP.G—aie(Od 12,202007:20 COT) �bnnaa4�' City Secretary OFFICIAL RECORD CITY SECRETARY FT. WORTH, TX STORMWATER FACILITY MAINTENANCE AGREEMENT 5 Rev.12/2912014 STATE OF TEXAS § COUNTY OF TARRANT § This instrument was aclnowledged before me on October 9,2020 by Dana Burghdoff, Assistant City Manager of the City of Fort Worth, on behalf of the City Of Fort Worth. Digitally signed by LAURIE LAURIE PEQUENO LEWIS o PRV pve` LAURIE PEQUENO LEWIS PEQUENO LEWIS Date:2020.10.0914:21:25 a Notary Public + + STATE OF TEXAS -05'00' Notary I.D.ls10, 23. NotaryPublic, State of Texas My Comm.Ex 952 p Dec.Dec.ec.10 20 STATE OF TEXAS § COUNTY OF Travis § Before me, the undersigned authority on this s day of September 2020 , personally appeared Paul D.Agarwal ----- known to me to be the person whose name is subscribed to the foregoing instrument and aclnowledged to me that the same is the act of CCI-54 Beach Retail, LP , and that he executed the same as its General Partner and as the act of such partnership and for the purposes and consideration expressed in the foregoing instrument. Robb Buchanan Notary Public, State 6f Texas • " i: ROBB BUCHANAN My Notary ID#12215382 1-25-2021 rF•• s'' Expires January 25,2021 OFFICIAL RECORD CITY SECRETARY STORMWATER FACILITY MAINTENANCE AGREEMENT FT. WORTH, TX Rev.12/29/2014 Contract Com;pli:ince iYlanal-el. By signin.g Iacknowledge that l.nni the person responsible for the molutoring and administration of this contract,including cnsuring all p:rformar<cc and.repoctin�reyuirements, gu rAI S. i!dorales DevcIupment Servicus iNJanager OFFICIAL RECORD CITY SECRETARY FT. WORTH, TX EXHIBIT "A" INSERT LEGAL DESCRIPTION STORMWATER FACILITY MAINTENANCE AGREEMENT 7 Rev.12/29/2014 N ABBREVIATION LEGEND ABBR. DEFINITION CC# COUNTY CLERK'S FILE NO. CIRF IRON ROD FOUND WITH CAP CM CONTROLLING MONUMENT LOT 1 A BLOCK 1 1/2"IRF XCF X-CUT FOUND FOR CORNER , W E XCF MOTOROLA ADDITION BEARS '15"E . CC#D203177660 @ 0.32' 1/2"CIRF"GSEN 4804" S POINT OF 1/2"CIRF 0' COM 50' 100, MENCING "4709" A=36°16'49" Scale 1"=100' R=70.00' L=44.32' CL=43.59' 41.25' CB=S18°36'09"E N89°16'39"E W co N00°34'49"W `L POINT OF OE 76.70' LO�0 o R=10722.27' BEGINNING F o L=180.04' 10'ENSEARCH U) CL=180.04' LOT 3,BLOCK 1 L EASEMENT o o CB=N89°19'39"E MOTOROLA ADDITION a VOL.11653,PG.2253 0 CC#D203177660 N / 70 O.P.R.T.C.T. N00°21'43"E z 43.77' w w 109.29' 87.51' Uj N89°47'51"E N89°05'05"E cobs m v'o S00°52'16 E�7A7� I N 49.9T ?j2, ; PRIVATE DRAINAGE EASEMENT `D 2" I N N 2.446 ACRES ah Q, M y' I o g (106,569 SQUARE FEET) h 'o by 1/2"CIRF `O ^ti z X C D �, ��^� a� "WAI„ A=19°07'13" Gam° �0 1/2"CIRF 1/2"CIRF I R=192.73' ' "PACHECO" "5557" L=64.32', G CL=64.02' XCF CB=S44°42'54"W PACHECO o A=53°00'46"�� �� 112'C1RF' BEARS z A=89°35'26" R=140.41' ' g64'09,0711 °L102A R=2.59' L=129,91' . I I L=4.06'zo CL=125.33' cq C,4 CL=3.66' CB=S58°54'20"W RIGHT-OF-WAY DEDICATION v° /CB=N38°50'46"W QF CC#D216074482 z S89°44'33"W 92.96' N89°59'21"W 105.72' 1/2"CIRF"5557" SAD° BEARS S13°55'33"W @ 0.23' psHE`` pRIVE SAN right-of-way) Wdocument shall not be W i n k e l m a n n PRIVATE DRAINAGE EASEMENT & Associates, Inc Preliminary, this 2.446ACRES CONSULTING CIVIL ENGINEERS 0 SURVEYORS (106,569 SQ. FT.) SHEET 5750 HILLCREST RA2A —,SWE215 (972).ea]oso recorded for any DALLAS,TEAS 1513a (9]2)190.]099 FAX Texas Engineers Reg�sVab-No.89 purpose and shall not Texas Surveyors No.1008SWO Expires 12-31-20 COPYRIGHT©2020,WnkelmannBAssovates.Inc. be used or viewed or CCI-BEACH II, LP OF Scale: 1`100' relied upon as a final g00 BRAZOS STREET, SUITE 600 Date: 04.28.20 survey document. 3 DW .File: 58059.OE-Drainage Easement AUSTIN, TEXAS 78701 Project No.: 58059.0E G:\580\59XOE\SURVEY\Easements\58059.DE-Drainage Easement.dwg PRIVATE DRAINAGE EASEMENT DESCRIPTION STATE OF TEXAS § COUNTY OF TARRANT § BEING a tract of land situated in the DAVID ODOM SURVEY, ABSTRACT NO. 1184, City of Fort Worth, Tarrant County, Texas, and being a portion of Lot 3, Block 1, Motorola Addition, an addition to the City of Fort Worth, Tarrant County, Texas, according to the plat thereof recorded in County Clerk's File No. D203177660, Plat Records, Tarrant County, Texas, and being more particularly described as follows: COMMENCING at a point for the Northeast corner of said Lot 3 and the Southeast corner of Lot 1A, Block 1, said Motorola Addition, from which a 1/2-inch iron rod found bears South 06 deg 21 min 15 sec East, at a distance of 0.32 feet, said point being situated in the Westerly right-of-way of N. Beach Street, a variable width right-of-way, and the beginning of a non-tangent curve to the right,with a radius of 70.00 feet, a central angle of 36 deg 16 min 49 sec, a chord bearing of South 18 deg 36 min 06 sec East, and a chord length of 43.59 feet; THENCE along said non-tangent curve to the right, the Easterly line of said Lot 3, and the Westerly right-of-way of said N. Beach Street an arc distance of 44.32 feet to a 1/2-inch iron rod with plastic cap stamped "4709"found; THENCE South 00 deg 27 min 35 sec East, continuing along the Westerly right-of-way of said N. Beach Street and the Easterly line of said Lot 3, a distance of 642.84 feet to a 1/2-inch iron rod with red plastic cap stamped "WAI"found; THENCE departing the Westerly right-of-way of said N. Beach Street and over and across said Lot 3 the following: North 55 deg 13 min 41 sec West, a distance of 272.12 feet to the POINT OF BEGINNING,- South 00 deg 52 min 16 sec East, a distance of 49.97 feet to a point for corner; South 00 deg 37 min 00 sec East, a distance of 48.93 feet to a point for corner, said point being the beginning of a curve to the right, with a radius of 132.09 feet, a central angle of 56 deg 45 min 06 sec, a chord bearing of South 30 deg 42 min 40 sec West, and a chord length of 125.55 feet; Along said curve to the right, an arc distance of 130.83 feet to a point for corner, said point being the beginning of a curve to the left, with a radius of 192.73 feet, a central angle of 19 deg 07 min 13 sec, a chord bearing of South 44 deg 42 min 54 sec West, and a chord length of 64.02 feet; Along said curve to the left, an arc distance of 64.32 feet to a point for corner, said point being the beginning of a curve to the right, with a radius of 140.41 feet, a central angle of 53 deg 00 min 46 sec, a chord bearing of South 58 deg 54 min 20 sec West, and a chord length of 125.33 feet; Along said curve to the right, an arc distance of 129.91 feet to a point for corner; North 89 deg 59 min 21 sec West, a distance of 105.72 feet to a point for corner; South 89 deg 44 min 33 sec West, a distance of 92.96 feet to a point for corner, said point being the beginning of a curve to the right, with a radius of 2.59 feet, a central angle of 89 deg 35 min 26 sec, a chord bearing of North 38 deg 50 min 46 sec West, and a chord length of 3.66 feet; Along said curve to the right, an arc distance of 4.06 feet to a point for corner; North 00 deg 32 min 48 sec West, a distance of 48.80 feet to a point for corner; North 00 deg 34 min 44 sec West, a distance of 89.36 feet to a point for corner; (Continued on Sheet 3) WW i n k e l m a n n PRIVATE DRAINAGE EASEMENT & Associates, Inc Preliminary, this 2.446 ACRES CONSULTING CIVIL ENGINEERS■SURVEYORS document shall not be SHEET OR fi]Se HILlGREST recorded for any (1061 569 SQ. FT.) PLAZA NE.SUITE 215 (e]2)490-]090 eALLAS,TEXAS ]52]0 ,9]2I 490.]e�FAX Texas Engineers ReglsVaoon No.60 purpose and shall not Texas Surveyors No.10086600 Expires e7 12-31-20 be used or viewed or COPYRIGHT 2020,W1nk ci eli—B Assoates,Inc. CCI—BEACH II, LP OF Scale: NIA relied upon as a final Date: 04.28.20 survey document. 800 BRAZOS STREET, SUITE 600 D%kq.File: 58059.0E-Drainage Easement AUSTIN, TEXAS 78701 Project N0.: 58059.0E G:\580\59\OE\SURVEY\Easements\58059.OE-Drainage Easemi PRIVATE DRAINAGE EASEMENT DESCRIPTION (Continued from Sheet 2) North 00 deg 24 min 56 sec West, a distance of 102.03 feet to a point for corner; North 89 deg 47 deg 51 sec East, a distance of 109.29 feet to a point for corner; North 89 deg 05 min 05 sec East, a distance of 87.51 feet to a point for corner; North 00 deg 21 min 43 sec East, a distance of 43.77 feet to a point for corner; North 00 deg 09 min 17 sec West, a distance of 50.67 feet to a point for corner; North 00 deg 34 min 49 sec West, a distance of 76.70 feet to a point for corner; North 89 deg 16 min 39 sec East, a distance of 41.25 feet to a point for corner; South 00 deg 28 min 50 sec East, a distance of 101.13 feet to a point for corner, said point being the beginning of a non-tangent curve to the left, with a radius of 10,722.27 feet, a central angle of 00 deg 57 min 43 sec, a chord bearing of North 89 deg 19 min 39 sec East, and a chord length of 180.04 feet; Along said non-tangent curve to the left, an arc distance of 180.04 feet to the POINT OF BEGINNING. CONTAINING within these metes and bounds 2.446 acres or 106,569 square feet of land, more or less. Bearings shown hereon are based upon an on-the-ground Survey performed in the field on the 4th day of June, 2019, utilizing the West boundary line (N00°04'49"E) according to the plat of Lots 1A, 2 and 3, Block 1, Motorola Addition, recorded under County Clerk's File No. D203177660, Plat Records, Tarrant County, Texas. W W i n k e l m a n n PRIVATE DRAINAGE EASEMENT & Associates, Inc Preliminary, this 2.446 ACRES document shall not be SHEET CONSULTING CIVIL ENGINEERS 0 SURVEYORS (106,569 SQ. FT.) 6750 HILLCREST PLAZF DRIVE.SUITE 216 (9]3)Ja0.]J90 recorded for any ALL0.5.TEAS 75330 T ,9]]I 490.]099 FTX exas Engineers Registrada No.89 purpose and shall not Texas Surveyors No.10086600 Expires 12-31-20 COPYRIGHT)2020,rsNo.1 08660 Expis o2-31-20 be used or viewed or CCI-BEACH II, LP OF Scale: NSA relied upon as a final Date: 04.28.20 survey document. 800 BRAZOS STREET, SUITE 600 DW .File: 58059.0E-Drainage Easement AUSTIN, TEXAS 78701 Project N0.: 58059.0E G:\580\59\OE\SURVEY\Easements\58059.OE-Drainage Easement.dwg N EXHIBIT B "DESING PLAN AND SPECIFICATIONS" W E S 0 100 200' SCALE: 1" = 100' ?EA CH % UL4 I 655ICI t I III IRON _ 1- FENCE r l 8 x8' CONCRETE r -_-_ PAD (tYP) WA TER r r FEA TORE IRON �z=—•- ! FENCE ; 6 i d r. f. b' 'A rC5 FEA TORE d =;' k OUTLET � I STRUCTURE f, j ( IRON ,f — I FENCE: /650— EXISTING OVERFLOW SPILL WA Y if I -- u I __ — .' ; PPS PLAN VIEW Ax Aswciates, Inc..a man � RETENTION X-SECTIONS COPSUL71NO`"` "MRS SUWEfOn 5401 N. BEACH STREET nso xurnm rurt t+RSG sort s,s Iml+so-xu e o.,&Vw w Rp trou R Ir B9 (ntl�so-]aw rul Teaa.Svvryv.Rcgl. kW.N., a-W MnANman FORT WORTH, TEXAS aPYR�clIT•-2Uz0. a Auodatn, e Scale : 1" = 100' Date : 07 22 2020 Dwg. File : RETENTION POND.DWG Pro'ect No. 655 655 4' O�RD ------- 9 t t"' 1 1 A I 650 650 --4-t100YR WSEL---1 645 645 0+00 1+00 2+00 3+00 4+00 5+00 X-SECTION A -A N.TS. 660 660 -------- ........ 655 655 -vFREEBOARD 1.22' ; EVERGENCY-1-- SPILL WA Y I. TM 650 I 1 1 1 A 1 650 100YR WSEL 645 - 645 0+00 1+00 2+00 '3+00 4+00 5+00 X-SECTION B-8 ' I 1 N.T.S.Winkelmann 4LI tit, w & Associates, Inc. RETENTION X-SECTIONS SHEET CONSONO CWL EWNEM m SURMORS 5401 N. BEACH STREET T Na 1 89 FORT WORTH, TEXAS N. �6-m I —&A..d°-1— 2 Scale 100' Date : 0711612020 Dwg. File : RETEN77ON POND.DWG lProiect No. , 58059.OE 650 - I I RtEi?Q RD 650 7- Vertical 4 .24 27.JZ.- 1 Scale 1 . 2 647 647 0+00 1+00 1+80 SPILL WA Y CROSS SEC 77ON Horizon tal Scale = I"-40' IRON jEx 649. 30ng FENCE SPILLWAY CROSS /Cv ICV(5 do SECTION 0 #0 co 650 SS MH G1 LP E,00 r- SN avow SPILLWAY CALCULATIONS N TAX domommom 100-YEAR Channel Height h 123 ft Base b 30.08 ft Mannings n 0.035 Slope S 0.63 % Right Side Slope zR 44.24 fUft Left Side Slope zt- 27.32 ft/ft Channel Area Ch A 91.13 ft2 Water Area A 10.87 ft2 Wetted Perimeter Wp 49.61 R Hydraulic radius R 0.219084 Velocity V 1.22 ft/s Depth d 0-272803 ft Flow Flow Rate Qcap 25831 jefs Q100 13.31 cis W ><n a mann & Associates. Inc. EXISTING SPILLWAY X—SECTIONS CONSMT1NO CML EWNEE" M SUR&YORS SHEET 5401 N. BEACH SMEET T...Erphws Rpk"Um N,89 Teat.Sveyur. U.—.. �-w kl.—&A..dt�I— FORT WORTH, TEXAS Scale : I" = 100' Date : 07,422 d 12020 3 Dwq. File : RETENTION POND.DWG Proiect No. : 58059.OE I EXISTING CIRCULAR ORIFICE WITH GRATE N CIRCULAR ORIFICE — PLAN VIEW DETAIL 7.2' - EXISTING STRUCTURE CC]-Bea z) rn n 100—YEAR WSE = 648.18 O O RETENTION POND 5—YEAR WSE = 647.34 0 WSE=646.40 1—YEAR WSE = 647.00 :I 11=1 11=1 11=1 11=1 11=1 I I CIRCULAR ORIFICE 11 =1 11=1 11=1 11=1 =1 11=1 II1�1=1 I I=1 I El 11=1 I WI TH GRATE I�I I-1 11=1 I H I 1=1 11-1 I I .I I I I I I l l l l l lI'1 1 1 I I I I I I I I I I I I I I I I I I I 11 I I I I 1 1 1 I I I 1 1 1 1 1 1 I I I I I I I 1 I I I I I I I CIRCULAR ORIFICE — CROSS SECTION DETAIL wWin a mann & Associates, Inc. DETENTION ORIFICE CALCULATIONS CONSU xi C r ENGIn'E" ■SURVEYORS SHEET ,, 7— .I= f.2), °° 5401 N. BEACH STREET T... cocas T, nn.co-x.c rAr T..e.GgFw RpYfmllen No 9q ic.o.Sv�eTer.Reyl ftkd Rs I FORT WORTH, TEXAS CCPTPoGRT c ZOs0.MinkNmmn k As.odat.4 I20711712020 < Scale : 1 = 2' Date : 07 17 2020 4 Dwq. File : EX POND STORAGE.DWG Project No. DETENTION POND CALCULATIONS OUTLET STRUCTURE CALCULATIONS MODIFIED RATIONAL METHOD 1-YR 5-YR 100-YR WTR Surface Elev. 647.00 647.34 648.18 Elevation Difference 0.60 0.34 0.84 PRE-DEVELOPMENT gfeied5e(cfs) 6.52 12.82 14.63 Runoff Coefficient,C.1 0.30 Area,A(acres)l 13.898 CIRCULAR WEIR OPENING DETAILS Time of Concentration,Tc(min)l 15 Area-A(ft2) 40.72 POST-DEVELOPMENT Diameter-D(ft) 7.20 Runoff Coefficient,C1 0.87 Radius-r(ft) 3.60 Area Detained,Ad(acres)l 13.898 Weir Height-W(ft) 4 00 Time of Concentration,Tc(min) 10 EFFECTIVE HEAD-H(ft) H-wsL 0.60 H.vvsz 0.94 H.sys3 1.03 Storm Year Event 1-YR 5-YR 100-YR DISCHARGE RATE-Cb(CFS) OR-wsi 6.52 QR.wsz 12,82 QR.ws3 14.63 Coefficient,e 0.82169 0.81423 0.77982 Coefficient,b 43.653 71.154 110.202 Coefficient d 8 12 14 Pre-Development Intensity,I in/hr 3.32 4.86 7.98 Allowable Release Rate,Qa WS)l 13.84 20.27 33.27 Proposed Release Rate,OR(cfs) 6.52 12.82 14.63 Rainfall Factor,a 95.835 170.81 322.07 Rainfall Factor,b 13.425 19.435 24.388 Critical Storm Duration,Td(min) 55.64 59.70 89.55 Critical Storm Intensity,Ird(in/hr) 1.44 2.19 2.96 Vpreliminary,(ft) 43,166.75 66,678.82 139,945.66 PTd(in) 1.33 2.18 4.41 Piao(in) 1.77 2.94 5.43 VMAX,(ft ) 57,277.08 89,771.01 172,229.05 VMAX,(ac-ft) 1.31 2.06 3.95 WSE 647.00 647.34 648.18 RATING TABLE CCI-Be Ele\,ation Head Discharge Rate Storage Storage (ft) (ft) H/R* Calculation (cfs) (cu-ft) (ac-ft) 649.00 1.84 0.51 WEIR 36.29 254937.78 5.85 648.18 1.03 0.28 WEIR 14.63 172229.05 3.95 647.50 1.10 0.31 WEIR 16.31 105185.52 2.41 647.34 0.94 0.26 WEIR 12.82 89771.01 2.06 647.00 0.60 0.17 WEIR 6.46 1 56908.17 1 1.31 647.00 0.60 0.17 WEIR 6.52 57277.08 1 1.31 646.50 0.10 0.03 WEIR 0.43 9406.26 1 0.22 646.40 0.00 0.00 WEIR 0.00 0.00 0.00 *R=OUTLET PLATE OPENING RADIUS. CIRCULAR ORIFICE EQUATION CIRCULAR WEIR EQUATION Q = Cd(1/47TD2) 29H Q = Cd(27002 Storm Event QR WSE HEAD VMAX, (ft) VmAx, (ac-ft) 100 14.63 648.18 1.030 172,229 3.95 5 12.82 647.34 0.940 89,771 2.06 1 1 6.52 1 647.00 1 0.604 1 57,277 1 1.31 Winkelmann & Associates, Inc. DETENTION ORIFICE CALCULATIONS MNSULTWC CML ENCWEERS .SURverors SHEET f9n7=Fx 5401 N. BEACH STREET Teeee EnyFes-e Regi.trellon Ne.B9 Teeoe YRIGHT SrT R071 ratb vmNo.10 5-W FORT WORTH, TEXAS WP ��4(Y10.MSnkdm h Neackle;Inc5 Scale . Date . 07 17 2020 Dwg. File : EX POND STORAGE.DWG Proiect No. : 58059.OE 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.12/29/2014 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.12/29/2014 Condition of filtrations stem Berm or Embankment Settlement Location of erosion Evidence of Animals Evidence of Aquatic life CCI-BeC STORMWATER FACILITY MAINTENANCE AGREEMENT 10 Rev.12/29/2014