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HomeMy WebLinkAboutContract 50131 CITY SECRETARY CONTRACT NO. DOE # — STORMWATER FACILITY MAINTENANCE AGREEMENT THIS AGREEMENT, made and entered into this day ofC3, by and between Sunrise Development, 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 Lot 1, Block 1, of the Justin Boot Com any Addition, consisting of an approximate 2 1.10 acre tract located in the J.C. McComas Survey, Abstract 1047, Tarrant County, Texas according to the deed recorded as Document No. D216071525, 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 3500 E. Long Avenue 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 adequatcly maintained by the OFFICIAJL.RECORD STORMWATER FACILITY MAINTENANCE AGREEMENT CITY SECRETARY 1 Fr.WORM,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 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 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 Executed this_ 5> day of 94,�a",ax 20 . Sunrise Development, LLC City of Fort Worth L lL Nat e: Jesus J. Chapa Assistant City Manager Title: Approved as to Form and Legality t' nvl 1 . ssistant City Attor ey ATTEST FpRT�. ity Secre �XAS 1295:- ®"ICIA""calm RE T'$wOrtlrw,TX STORMWATER FACILITY MAINTENANCE AGREEMENT 5 STATE OF TEXAS § COUNTY OF TARRANT § This instrument was acknowledged before me on ,ai2t yy % Zoly by Jesus J. Chapa, Assistant City Manager of the City of Fort Worth, on be alf of the City of Fort Worth. IRY PU''� TRIKINYA L JOHNSON =O' cNotary Public, State of Texas — .c Comm. Expires 04-17-2018 Notary P lic, 1ple of Texas f7TF OF'CF'+� Notary ID 1238832.0 STATE OF TEXAS § COUNTY OF TARRANT § Before me, the undersigned authority on this day of 20_, 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 , and that he executed the same as its and as the act of such and for the purposes and consideration expressed in the foregoing instrument. Notary Public, State of Texas Sa�SCc'�hpd and Smarr-, �v bQ vr2 Me /U�"ary I ubl. L - n aid ��� ��.e Sk��� ® oK\o�� 0. , -�h,s ►5�- �Qy oC ��c e nib-1- F- aot-1 ��saTa;�:sati', *1700{715 e �i�•OS/0?J18 c Q' C.C�mmiSS ,o� �6c) . 1 �c�©�{l1S OFFICIALRECORD STORMWATER FACILITY MAINTENANCE AGREEMENT SECREY 6 FTS WO Contract Compliance Manager By signing I acknowledge that I am the person responsible for the monitoring and administration of this contract, including ensu ging a " erfoand porting requirements. 4 Janie S. orales Development Manager OFFICIAL.RECORD CITY SECRETARY FT.WORTH,TX EXHIBIT "A" LEGAL DESCRIPTION Exhibit A Page 1 of 1 PRIVATE DRAINAGE EASEMENT JUSTIN BOOT COMPANY ADDITION PART OF LOT 1, BLOCK 1 J.C. McCOMMAS SURVEY, ABSTRACT NO. 1047 CITY OF FORT WORTH, TARRANT COUNTY, TEXAS Being a 38,503 square foot (0.88 acre) tract of land situated In the J.C. McCommas Survey. Abstract No. 1047, being part of Lot 1, Block 1 of Justin Boot Company Addition, an Addition to the City of Fort Worth, Tarrant County, Texas, as recorded in Volume 388-214, Page 65, Map Records, Tarrant County, Texas, and being part of that tract conveyed to Sunrise Development by Special Warranty Deed recorded in Instrument No. D216071525, Official Public Records, Tarrant County, Texas, and being more particularly described by motes and bounds as follows: COMMENCING at a 5/8 inch iron rod found at the Southwest corner of a tract of land conveyed to Joseph A. Ciementi by Deed recorded in Instrument No. D214164745, Official Public Records, Tarrant County, Texas, said point being on the Northwest line of Lot 16, Block 19 of North Riverside Estates. an Addition to the City of Fort Worth, Tarrant County, Texas, according to the map recorded In Volume 388-13. Page 13, Map Records, Tarrant County, Texas; THENCE North 01 degrees 06 minutes 13 seconds West. along the West line of said Clementl tract, a distance of 27.55 feet to a point for corner. THENCE leaving said West line of Clementl tract and traversing through said Sunrise Development tract as follows: South 45 degrees 25 minutes 17 seconds West, a distance of 39.93 feet to a point for corner and the POINT OF BEGINNING; South 45 degrees 25 minutes 17 seconds West, a distance of 20.08 feet to a point for corner; North 49 degrees 47 minutes 34 seconds West, a distance of 14.71 feet to a point for corner; South 45 degrees 25 minutes 30 seconds West, a distance of 110.23 feet to a point for corner; North 44 degrees 31 minutes 07 seconds West, a distance of 226.05 feet to o point for corner; North 04 degrees 37 minutes 58 seconds West, a distance of 44.37 feet to a point for corner; North 85 degrees 22 minutes 02 seconds East, a distance of 160.46 feel to a point for corner; North 04 degrees 37 minutes 58 seconds West, a distance of 10.00 feet to a point for corner on the South rlght—of—way line of E. Long Avenue (variable width right—of—way); THENCE North 85 degrees 22 minutes 02 seconds East, along sold South right—of—way line of E. Long Avenue, a distance of 40.00 feet to a point for corner; THENCE leaving said South right—of—way line of E. Long Avenue and traversing through said Sunrise Development tract as follows: South 04 degrees 37 minutes 58 seconds East, a distance of 10.00 feet to a point for corner; North 85 degrees 22 minutes 02 seconds East, a distance of 57.72 feet to a point for corner, South 01 degrees 07 minutes 20 seconds East, a distance of 129.92 feet to a point for corner; South 45 degrees 25 minutes 30 seconds West, a distance of 6.99 feet to a point for corner; South 49 degrees 47 minutes 34 seconds East, a distance of 14.71 feet to the POINT OF BEGINNING and containing 38,503 square feet or 0.88 of an acre of land. GENERAL NOTES: Bearings are are based on Texas Slate Plonr Coordinates, North Central Zone. NAD83 (2011). BRYA CC.0NgALLY R.P.L.�`.`'N`�`.�•5;5.1':3 .' CBG Surveying, Inc. SHEET 1 OF 2 PLANNING SURVEYING JOB NO. 1701040-2 12025 Shiloh Road - Sulfa 230 Dallas. Texas 75228 DRAWN BY: MC P 214.349.9485 F 214.349.2215 DATE: 12/13/17 Firm No. 10158800 www.cbglncfx.com , _ ;�.�� u; , .' ,., . � z M .. �, .�, a r..,. -, . .., ,is � :. _. w.. ., z ..Y � _ � s �, ._i.. E d r� PRIVATE DRAINAGE EASEMENT JUSTIN BOOT COMPANY ADDITION Line Table PART OF LOT 1, BLOCK 1 �f Line Direction Length J.C. McCOMMAS SURVEY, ABSTRACT NO. 1047 L7 S0/'08'13"E 27.55' CITY OF FORT WORTH, TARRANT COUNTY, TEXAS � y L2 S45'25'1 7"W 39.93' c ;� L3 S45'25'17"W 20.08' 'p L4 N49'47'34"W 14.71' 50' 25' 0 50' 100, L5 N04.37'58"W 10,00' L6 N85'22'02"E 40.00' SCALE: 1 " = 50' L7 SO4.37'58"E 10.00- L8 N85'22'02"E 57.72' AVENUE 7.a' UTILITY ESMT. E LONG VOL 3118-214• PG. 65 L9 S45025'30"W 6.99' VARIABLE WIDTH R.O.W• M.R.T.C.T. L6 S85'22' 2-W 93.39' 1l2;——-- LI O 549'47'34"E 14.71' adsse' -- cm 1 2' CbL N85'22'02"E 160.46' I 10' TESCO ESMT. VOL. 4003, PC. 64 40- 4 N U N O.R.T.C.T. cri ° � Woo La ,,t��p•� PRIVATE 6RAWA¢E; N 38;503 SOFT. I i• I 0.88. ACRES o LOT 1. BLOCK 1 I / JUSTIN BOOT COMPANY ADDITION VOL. 388-214, PG. 65 M.R.T.C.T. T. L9 POB l f O, SUNRISE DEVELOPMENT. LLC r" .�,rJ( ` C ♦� AN OKLAHOMA LIMITED LIABILITY CO. "' �• 5�° ♦S INST. NO. D216071525 O.P.R.T.C.T. LEGEND !:.. 0IRON ROD FOUND / iPb�♦ tir�b e POINT FOR CORNER ;f T. / "'" �Q 'ti / ♦� Cy' POC POINT OF COMMENCEMENT10' 4003. PGM 64 X. e ���G wpG a�'�' vp6 POB POINT OF BEGINNING D.R.T.C.T.Cm CONTROL INET. N0. NSTRUMENTONUMBER /•/ / �Jr % 4,y��,. VOL. P0. VOLUME, PAGE R.O.W. RIGHT-OF-WAY O.P.R.T.C.T. OFFICIAL PUBLIC RECORDS. ♦� 1� a TARRANT COUNTY, TEXAS ' M.R.T.C.T. MAP RECORDS, TARRANT COUNTY. TEXAS yn4 oy�a "/ / / r�r C" O.R.T.C.T. DEED TARRANT COUNTY, TEXAS ,y',6 4y' 4• ESIAT. EASEMENT / + ,� / ` tic ♦•��/ f � ♦O _., SOFT. SQUARE FEET �`'� / ♦>w Ir> , AH CYYINALI..' GENERAL NOTES: Bearings are based on Texas State Plane Coordinates. North Central Zone, NAD83 (2011). BRYAN C NA1= R,P.L.S. 0. 5513 CBG Surveying, Inc. SHEET 2 OF 2 PLANNING • SURVEYING JOB NO. 1701040-2 12025 Shiloh Road • Suite 230 • Dallas, Texas 75228 DRAWN BY: MC P 214.349.9488 , F 214.349.2216 SCALE: 1"=50' www.cb91notx.a*m0 DATE: 12/13/17 ":a :�. a ... ,. ;��,. a .. 4 a s" �t.� ,,, .� , _. ., _.,., :" ,� .. d � � �, .,.. i .,. �� ... A. f k � 1V .. ._. R .,,. � / } ,�� �f �' �, ��i, t? �° .. u. f � f' x� � 'b .. { g x.. .. 1. (% A I tl M IMI V V/'111� � VLfVt\ EXHIBIT "B" Design Plan and Specifications The project site is located in Fort Worth at 3500 East Long Avenue. The total lot size is approximately 20.10 acres and is described as Lot 1, Block 1 of the Justin Boot Company addition. Proposed development will occur over an area of approximately 9.6 acres, which consists of the northern portion of the lot. The remainder of the lot is currently developed with an existing warehouse building,which is approximately 151,433 square feet and was built on 1965. Proposed development consists of 2 proposed building structures with a total surface area of 84,000 square feet, and associated site improvements. EXISTING CONDITIONS The approximate 9.6 acre site area is primarily undeveloped, except for a driveway from the existing warehouse building within the southern portion of the lot to East Long Avenue, and drainage improvements along the northeastern side of the property. In general, the existing topography falls from the southwest to the northeast. The existing drainage improvements consist of a concrete lined channel along the northeastern property line which captures sheet flow run-off from the North Riverside Estates residential subdivision to the east of the site, sheet flow run-off from the site and upstream runoff from the south. The concrete lined channel outfalls to two 36" drainage pipes which flow towards East Long Avenue. A 36" drainage pipe runs parallel to the concrete lined channel and is utilized as a conveyance relief for an area within the North Riverside Estates, south of the site. This 36" drainage pipe runs to East Long Avenue as well. The storm sewer system within East Long Avenue then conveys the storm water runoff to Little Fossil Creek. BASIS OF DESIGN AND PROPOSED DRAINAGE ANALYSIS Existing and proposed rainfall, run-off and hydraulic calculations were performed in accordance with ISWM and the City of Fort Worth Standards. Peak runoff rates and rainfall amounts were determined by the SCS Method (TR-55), based on Tarrant County rainfall data using a type II distribution. The 100-year peak flow rate was utilized for all storm sewer capacity analysis and sizing. The 100-year, 50-year, 25-year, 5-year and 1-year design storms were utilized for the detention sizing and release rates. Existing and off-site information was analyzed based on the as-built/record drawing information received from the City of Fort Worth Engineering records and available aerial, GIS, and topographic data. Down-stream impacts through the"Zone of Influence" were limited to the 10% rule. The existing downstream drainage improvements were analyzed to determine the capacity of the existing system. Through our analysis, we determined storm water detention is required to reduce CAIN-CLICK ENGINEERING, INC. Exhibit B 325 N.SAINT PAUL,SUITE 2850 Page 1 of 14 DALLAS,TX 75201 214-871-2302 TBPE FIRM#10142 n A 1L1 01 InV V/'111� � VLIVn the peak run-off rates from the proposed developed conditions to the existing condition peak run- off rates for the design storm events. The following is a summary of the storm water detention pond design. Required Detention Pond Volumes and Allowable Release Rates Design Storm Required Volume Allowable Release Rate 100-Year 1.52 acre-ft 47.84 cfs 50-Year 1.29 acre-ft 41.94 cfs 25-Year 1.15 acre-ft 36.12 cfs 5-Year 0.43 acre-ft 23.95 cfs 1-Year 0.34 acre-ft 13.13 cfs Provided Detention Pond Volume and Elevations Provided Detention Capacity 1.52 acre-ft Bottom of Pond Elevation 570.80 feet 100-Year Water Surface Elevation (WSEL) 579.00 feet Freeboard Elevation 580.00 feet Spillway Elevation 581.00 feet Top of Berm Elevation 582.00 feet 100-Year WSELSurface Area 0.44 acres Refer to the following calculations for the detailed analysis of the required detention pond volume, provided capacity, and detention release rates. CAIN-CLICK ENGINEERING, INC. Exhibit B 325 N.SAINT PAUL,SUITE 2850 Page 2 of 14 DALLAS,TX 75201 214-871-2302 TBPE FIRM#10142 P A 11 Ll P If%V tj riiivi " 4jLIVIX SCS Method Detention Pond Design(100-year) Existing Conditions 100 Year Tributary Area(A)= 11.18 acres Composite CN Value(CN)= 79 Time of Concentration(Ts)= 0.318 Hrs Calculated Rainfall Amount(Pioo)= 11.73 inches 100-yr Calculated Runoff Rate Rate(Q)= 53.51 cfs Potential Maximum Retention After Runoff S(Sloo)= 2.66 inches Initial Abstraction I(Iloo)= 0.53 inches Proposed Conditions 100 Year Tributary Area(A)= 11.18 acres Composite CN Value(CN)= 98 Time of Concentration(Ts)= 0.125 Hrs Calculated Rainfall Amount(P1oo)= 10.10 inches 100-yr Calculated Runoff Rate Rate(Q)= 100.29 cfs Potential Maximum Retention After Runoff (Sloo)= 0.20 inches Initial Abstraction I(Iloo)= 0.04 inches 100-Year Detention Requirements Existing Rainfall Amount(Ptoo)= 11.73 inches Proposed Rainfall Amount(Plop)= 10.10 inches Difference(Pioo)= 1.63 inches Required Detention Volume(loo)= 1.52 acre-ft 100-Year Required Detention Release Rate Undetained Calcualted Runoff Tributary Area(Al 2+A6)= 0.59 acres Composite CN Value(CN)= 98 Time of Concentration(Ts)= 0.103 Hrs 100-yr UndetainedRunoff Rate Rate(Q)= 5.67 cfs 100-yr Calculated Runoff Rate Rate(Q)-100yr Undetained Runoff Rate=100 yr Required Detention Release Rate 100-Year Required Detention Release Rate(Qioo 47.84 cfs CAIN-CLICK ENGINEERING, INC. Exhibit B 325 N.SAINT PAUL,SUITE 2850 Page 3 of 14 DALLAS,TX 75201 214-871-2302 TBPE FIRM#10142 in A 1 L1 Ir l IM/ / + W1111 tiLIVIX ' SCS Method Detention Pond Design(50-year) Existing Conditions 50 Year Tributary Area(A)= 11.18 acres Composite CN Value(CN)= 79 Time of Concentration(Ts)= 0.318 Hrs Calculated Rainfall Amount(Pso)= 10.41 inches 50 yr Calculated Runoff Rate Rate(Q)= 47.09 cfs Potential Maximum Retention Atter Runoff (Sso)= 2.66 inches Initial Abstraction 1(15o)= 0.53 inches Proposed Conditions 50 Year Tributary Area(A)= 11.18 acres Composite CN Value(CN)= 98 Time of Concentration(Ts)= 0.125 Hrs Calculated Rainfall Amount(P50)= 9.03 inches 50-yr Calculated Runoff Rate Rate(Q)= 91.14 cfs Potential Maximum Retention Atter Runoff (Sso)= 0.20 inches Initial Abstraction 1(15o)= 0.04 inches 50-Year Detention Requirements Existing Rainfall Amount(Pso)= 10.41 inches Proposed Rainfall Amount(P5o)= 9.03 inches Difference(Pso)= 1.38 inches Required Detention Volume(So)= 1.29 acre-ft 50-Year Required Detention Release Rate Undetained Calcualted Runoff Tributary Area(A14)= 0.59 acres Composite CN Value(CN)= 98 Time of Concentration(Ts)= 0.103 Hrs 50-yr UndetainedRunoff Rate Rate(Q)= 5.15 cfs 50-yr Calculated Runoff Rate Rate(Q)-50yr Undetained Runoff Rate--50 yr Required Detention Release Rate 50-Year Required Detention Release Rate(Qso - 41.94 cfs CAIN-CLICK ENGINEERING, INC. Exhibit B 325 N.SAINT PAUL,SUITE 2850 Page 4 of 14 DALLAS,TX 75201 214-871-2302 TBPE FIRM#10142 PAILI Pl 1f%11 Vnill VLIVI�► i SCS Method Detention Pond Design(25-year) Existing Conditions 25 Year Tributary Area(A)= 11.18 acres Composite CN Value(CN)= 79 Time of Concentration(Ts)= 0.318 Hrs Calculated Rainfall Amount(P25)= 6.87 inches 25-yr Calculated Runoff Rate Rate(Q)= 40.75 cfs Potential Maximum Retention After Runoff S(S25)= 2.66 inches Initial Abstraction I(125)= 0.53 inches Proposed Conditions 25 Year Tributary Area(A)= 11.18 acres Composite CN Value(CN)= 98 Time of Concentration(Ts)= 0.125 Hrs Calculated Rainfall Amount(P25)= 5.63 inches 25-yr Calculated Runoff Rate Rate(Q)= 81.87 cfs Potential Maximum Retention After Runoff S(S25)= 0.20 inches Initial Abstraction 1(125)= 0.04 inches 25-Year Detention Requirements Existing Rainfall Amount(P25)= 6.87 inches Proposed Rainfall Amount(P25)= 5.63 inches Difference(P25)= 1.24 inches Required Detention Volume(V25)= 1.15 acre-ft 25-Year Required Detention Release Rate Undetained Calcualted Runoff Tributary Area(A14)= 0.59 acres Composite CN Value(CN)= 98 Time of Concentration(Ts)= 0.103 Hrs 25-yr UndetainedRunoff Rate Rate(Q)= 4.63 cfs 25-yr Calculated Runoff Rate Rate(Q)-25yr Undetained Runoff Rate=25 yr Required Detention Release Rate 25-Year Required Detention Release Rate(Q25)= 36.12 cfs CAIN-CLICK ENGINEERING, INC. Exhibit B 325 N.SAINT PAUL,SUITE 2850 Page 5 of 14 DALLAS,TX 75201 214-871-2302 TBPE FIRM#10142 If% A ILI ,� 01 IPV Unll� toLIVn SCS Method Detention Pond Design(5-year) Existing Conditions 5 Year Tributary Area(A)= 11.18 acres Composite CN Value(CN)= 79 Time of Concentration(Ts)= 0.318 Hrs Calculated Rainfall Amount(PS)= 4.75 inches 5-yr Calculated Runoff Rate Rate(Q)= 27.46 cfs Potential Maximum Retention After Runoff (SS)= 2.66 inches Initial Abstraction I(h)- 0.53 inches Proposed Conditions 5 Year Tributary Area(A)= 11.18 acres Composite CN Value(CN)= 98 Time of Concentration(Ts)= 0.125 Hrs Calculated Rainfall Amount(PS)= 4.29 inches 5-yr Calculated Runoff Rate Rate(Q)= 62.12 cfs Potential Maximum Retention After Runoff (SS)= 0.20 inches Initial Abstraction 1(I5)= 0.04 inches 5-Year Detention Requirements Existing Rainfall Amount(PS)= 4.75 inches Proposed Rainfall Amount(PS)= 4.29 inches Difference(PS)= 0.46 inches Required Detention Volume(VS)= 0.43 acre-ft 5-Year Required Detention Release Rate Undetained Calcualted Runoff Tributary Area(A14)= 0.59 acres Composite CN Value(CN)= 98 Time of Concentration(Ts)= 0.103 Hrs 5-yr UndetainedRunoff Rate Rate(Q)= 3.51 cfs 5-yr Calculated Runoff Rate Rate(Q)-5yr Undetained Runoff Rate-5 yr Required Detention Release Rate 5-Year Required Detention Release Rate(Qs)= 23.95 cfs CAIN-CLICK ENGINEERING, INC. Exhibit B 325 N.SAINT PAUL,SUITE 2850 Page 6 of 14 DALLAS,TX 75201 214-871-2302 TBPE FIRM#10142 InAIll P1 IM/ tins ■ VLltjl% SCS Method Detention Pond Design(1-year) Existing Conditions 1 Year Tributary Area(A)= 11.18 acres Composite CN Value(CN)= 79 Time of Concentration(Ts)= 0.318 Hrs Calculated Rainfall Amount(PI)= 3.74 inches 1-yr Calculated Runoff Rate Rate(Q)= 15.60 cfs Potential Maximum Retention After Runoff (Sr)= 2.66 inches Initial Abstraction 1(11)= 0.53 inches Proposed Conditions 1 Year Tributary Area(A)= 11.18 acres Composite CN Value(CN)= 98 Time of Concentration(Ts)= 0.125 Hrs Calculated Rainfall Amount(PI)= 3.37 inches 1-yr Calculated Runoff Rate Rate(Q)= 43.75 cfs Potential Maximum Retention After Runoff S(Sr)= 0.20 inches Initial Abstraction I(Ir)= 0.04 inches 1-Year Detention Requirements Existing Rainfall Amount(Pr)= 3.74 inches Proposed Rainfall Amount(Pr)= 3.37 inches Difference(PI)= 0.36 inches Required Detention Volume(Vr)= 0.34 acre-ft 1-Year Required Detention Release Rate Undetained Calcualted Runoff Tributary Area(Al 4)= 0.59 acres Composite CN Value(CN)= 98 Time of Concentration(Ts)= 0.103 Hrs 1-yr UndetainedRunoff Rate Rate(Q)= 2.47 cfs 1-yr Calculated Runoff Rate Rate(Q)-lyr Undetained Runoff Rate=1 yr Required Detention Release Rate 1-Year Required Detention Release Rate(Qr)= 13.13 cfs CAIN-CLICK ENGINEERING, INC. Exhibit B 325 N.SAINT PAUL,SUITE 2850 Page 7 of 14 DALLAS,TX 75201 214-871-2302 TBPE FIRM#10142 A' D Cl)C m� = r� 3, n ri :320 r =u n �� 0 0 > 7C . n c m 2 M ti r Z c C) m Z /• v m oM p - Z DETENTION POND VOLUME AND OUTLET RELEASE RATING TABLE r Outllowl Outflow2 Ou"-2 - C7 Z Elevation Incremental Volume Cumulatiuc.Volume Orifice Release Rate Weir Release Rate Orifice Release Rate Totalmlease.Rio C1 iW'w A-(0) Area(Ac) Difference (ac-R) (ac40 (ds) (ds) (cis) (ch) 0 0.00 :321 004 0.20 0.00 OSA ;11 A) 1366 0.05 0.50 0,02 003 +.25 125 2856 0.07 0.50 0.03 006 515 575 319t 0.08 0.50 0.04 009 ?46 7,46 3969 0.09 050 0.04 0.14 8.85 8.85 573.50 4591 0.11 0.50 0.05 0.19 10..04 10.04 574.00 5257 012 0.50 006 0.24. 1'-11 11.11 57.1.5(1 5%9 Oil 0.50 0.% 0.31 12.:1 12.08 T-YEAR WSEL 574.75 0:34 12.54 1254 56.00 1:087 016 0.50 0,07 0.38 12.98 12.98 S-YEAR.WSF 575,30 0.43 13.50 13.50 ,75 50 312' '..19 0,50 0,09 1147 ]3 E3 13,83 P6.00 '9264 ,�-1 0.50 0.10 0'W14.62 14-62 a 6.5`0 1014. Illn 0.50 0,11 0.69 1537 35,37 577[10 11%3 027 0.50 0.13 0.81 16.09 1.77 17.86 577.50 13527 113: 050 0.15 0.96 1678 9.19 2597 W890 15231 1t, 0.50 0.17 L12 17,44 17,72 35.16 25-YEARWSE 5M,% 1.15 17.51 18.42 35.93 50-YEAR WSE1 578.41 L29 17.96 2204 4O.00 578,50 :7078 0.39 0.50 0.19 1.31 18.07 22.88 40,95 100-YEARWSEL 573.00 19042 0.44 0.50 0.21 L52 18.69 27,07 45.76 573,50 21102 1 048 0.50 0.23 1,75 FREEBORO 580.00 23203 1 053 0.50 F 0.25 2,00 80.50 SPILLWAY 581.W 581.50 TOPOFMNDI 582.00 tU 110 f0 m 00 O Q ti+ ? m P A 1 ■1 PI IPI/ VP111l VLIVIX OUTLET STRUCTURE ORIFICE FLOW RATES 100-YEAR WSEL 579.00 ft Depth(Orifice 1) 7.73 ft Cd=(Orifice 1) 0.60 Depth(Orifice 2) 1.75 ft Cd=(Orifice 2) 0.60 Q(orincel)= 1 18.69 ICI(orifice2)= 07 CFS Qloo REQUIRED= 47.84 CFS Qloo METERED= D 76 CFS 50-YEAR WSEL 578.41 ft Depth(Orifice 1) 7.14 ft Cd=(Orifice 1) 0.60 Depth(Orifice 2) 1.16 ft Cd=(0rifice2) 0.60 Q(orifieel)=1 17.96 jQorf,r.,,2i- 22.04 CFS Q5o REQUIRED= 41.94 CFS Q50 METERED= 40.00 CFS 25-YEAR WSEL 578.06ft Depth(Orifice 1) 6.79 ft Cd=(Orifice 1) 0.60 Depth (orifice 2) 0.81 ft Cd=(orifice 2) 0.60 Q(orificel)=1 17.51 Q(orifice2) 18.42 CFS Qts REQUIRED= 36.12 CFS Qts METERED= 35.93 CFS S-YEAR WSEL(orifice 1) 575.30 ft Depth 4.03 ft Cd= 0.60 Qs REQUIRED= 23.95 CFS Q5 METERED= 13.50 CFS 1-YEAR WSEL(Orifice 1) 574.75 ft Depth 3.48 ft Cd= 0.60 Ql REQUIRED= 13.13 CFS .Qi METERED= 12.54 CFS Orifice 1 Centroid Eievation 571.27 ft 'Orifice 2 Centroid Elevation 7 .25 ft Orifice 1 D-16.00"Area= 1.40 ft2 Orifice 2 Area= 4.25 ft2 CAIN-CLICK ENGINEERING, INC. Exhibit B 325 N.SAINT PAUL,SUITE 2850 Page 9 of 14 DALLAS,TX 75201 214-871-2302 TBPE FIRM#10142 P A ILI nl IPI/ ULIUM DETENTION POND SCHEMATIC PLAN I VA Ni0I21 soma cw xc'rcn a aR• a l I � ?�, �, f Ir 6 I i-s ono ac x w 1111 IIS ,..." -• +.� T� .: ter.e-s,s aex. cv,o: .,�. ,r -.' �✓� + ana9 aa; r —T—5mI;_ s' 1iM01080 W tel,MA°tt'Yf�� �� 582 Sgae au [r !4-`I.y�. S A 0•�]0 i2 atMr uar[3+ r L.. �_•t. nw...n �.. °tta 4Rcr}� u 1 CAIN-CLICK ENGINEERING, INC. Exhibit B 325 N.SAINT PAUL,SUITE 2850 Page 10 of 14 DALLAS,TX 75201 214-871-2302 TBPE FIRM#10142 P A I tl PI I f%V �I 166YR 676 I 676 YR 674 674 I i . .372 _ _ 02 d 676 670 0+00 1+00 2+00 ;Z_DETENTION POND CROSS SECTIONAL B-B 366 � 661 ' w2 „6 s6o t6o rR waE.3,9.00 m VR WSE•MAI 676 -.... 26 YR W6E•376A6 .... 676 6 YR WBE 676.10 374 Sri W 671. 670 670 0+00 1+00 2+00 DEMMON POND CROSS SECTIONAL C-C CAIN-CLICK ENGINEERING, INC. Exhibit B 325 N.SAINT PAUL,SUITE 2850 Page 11 of 14 DALLAS,TX 75201 214-871-2302 TBPE FIRM#10142 PAI &t f%l ir+v �n� �� VLIt1R 0.50%TOMAROS r-3,5W PSI COFKKTE /r almrpW POND (18-00 COOKSSYYE STIIENOM) !! µMAR Q TS"O., -- .—r— (eo7N aR[cRaos) 4 'a r (Mi> '.5!f•.:'.;: ATCD LIMEL' ANO COMPACT .O'..s!t;ra•::,,,.:. :.y rra DENSt7Y.) IM 41EU OF ,'ABMT,!,5-OF TXMT ITEM 247. TYPE A.tP �1..: '''.riXKIM SASE OAN K Pt.,IM ASOW Cf.l. .F-. -.-PME SUSCRADF"MAL BE COMPACtF.l -".•.YINDARD PROCTOR DENSITY. (PEFr"T,? a r1MT) DErENT ION POND MAINTENANCE ROADf PAD Soft NOt To sow 2C OAS IrAs�N T...-..I,.•--•--1 RD"TEsaD vT1UYY I I CASEMENT So gad_. 662 n I I 660 100 YR WSE•670.00 Q _ SO YR WSE-s)b.4i _.._,-..-._..�. I I ! I olwvz pf ski3SYuE.^.S2S�7(G._. 1 # _p I 3 I srs az"T. i I O '"b° t SH 01`''1I+1FC 910R1?Lf iPJ!PIC. 42"FIOi S �, 42'ItpPF Sf�.s M 1l 'S:a "tV AwtL1' 1� EFkLFFN toKFI C'7 .. CC'}7} it I sro - 570 0+00 1+00 2+00 3+00 _DMIMON POND CROSS SECTIONAL AREA A-A_ CAIN-CLICK ENGINEERING, INC. Exhibit B 325 N.SAINT PAUL,SUITE 2850 Page 12 of 14 DALLAS,TX 75201 214-871-2302 TBPE FIRM#10142 f% A 111 . til IPI/ Vn� �� VLiV� LANDSCAPE PLAN 1A 1 . lz bt IJ i} ♦ \ \F \� [A ' vi ti+.,'� ♦ �.'.4 Yf� E7.�✓_. . R Fd_ ii q _sem T l- A ONE y 582 W F F-� Xa 12 I4 'k I I CAIN-CLICK ENGINEERING, INC. Exhibit B 325 N.SAINT PAUL,SUITE 2850 Page 13 of 14 DALLAS,TX 75201 214-871-2302 TBPE FIRM#10142 PA ILI Ol Ir+V tjnll'f ' %jLlVR LANDSCAPE PLAN LEGEND KE TREES Y col Mrn Crni Dorn es coL • SIG Ov Wvas d Ir"na UVE t1AK �2�—tTMHslprt, l CaL�MM.Coq.Rest m"OaL 09 UC Gurus erapttata CEDAR EUA 12'—iS MSIMft,d—A'$nad ap•dmen 3'COL a Capt OaL B QT Gu•rW!a•an• Tiwd MW Oak 1spedm■+Htlph4t ,M-9 d Nwud SHRUBS O s Od-ft mum 03 CAL w kvpa wwkwm Amwfwn Bsadybsny Ir mkoku"Iwlgd at OvAbs 30*1 -M pian.lsakhllnnV 3D` b OdIl.MN h 311 AKIL MuMwvb•r9fa'Pink Flamfid hFi pk Fkgrdiga kWhly Ors•s Mfimun hrlyhL at piant'Yp Owed w pian,makhles GROUNDCOVER Del1LOA soo Cerrnan O.emwaa tfr.ss Nmud•ara.. s.aNd mI)rnri•air�udfsrm assra�s sAtidn n usys sf aw*m ltn CAIN-CLICK ENGINEERING, INC. Exhibit B 325 N.SAINT PAUL,SUITE 2850 Page 14 of 14 DALLAS,TX 75201 214-871-2302 TBPE FIRM#10142 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. 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 detention basin shall be returned to original 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. 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. Disposal of all trash sediment and debris shall be in accordance with federal, state and local regulations. Visual inspections and maintenance activities of all stormwater facility components shall be conducted at the intervals described below, A log shall be kept of all inspections and maintenance actions. Additionally, the log shall 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. Routine Inspection/Maintenance Procedures The following routine visual inspections and maintenance activities shall be performed on a monthly basis, or as required for proper operation of the Facility. • Detention facilities shall be mowed monthly between the months of April and October or anytime vegetation exceeds 12-inches in height. Exhibit C Page 1 of 2 • Outlet structures shall be inspected; and any trash, sediment, and debris shall be removed as necessary to maintain proper operation of the detention basin. • Trash and debris shall be removed from the detention basin. • Irrigation systems shall be inspected to confirm proper operation. Non-Routine Inspection/Maintenance Procedures The following visual inspections and maintenance activities shall be performed on an annual basis (every 12 months), or as required for proper operation of the Facility. • Detention basin earthen banks and dam shall be inspected for erosion, cracking, animal burrowing, large roots and any other elements that may affect the structural integrity. If necessary, maintenance shall be performed to repair and stabilize the earthen bank and dam structures. • Existing vegetation shall be inspected. If more than 30% of the area is un- protected by existing vegetation, those areas shall be re-vegetated in accordance with the landscape plan. • Sediment accumulation within the detention basin shall be inspected, when the detention basins volume is reduced by no more than 10%, the sedimentation shall be removed. The detention pond shall be returned to the original grades shown on the approved engineering plans. • Outfall structures, trickle channels, spillways, and other structural elements shall be inspected. If damage, cracking, or other disrepair is observed the structures shall be repaired or replaced. • Inspect rip-rap at spillway. Repair if needed. • Storm drainage pipes shall be inspected to determine if there is any accumulation of trash, sediment and debris within them. If trash, sediment and debris are observed, it shall be removed and disposed of. • Storm drainage piping shall be inspected for cracks or other damage. If cracking or damage is observed that affects the structural integrity of the pipe, the pipe shall either be repaired or replaced. Exhibit C Page 2 of 2 EXHIBIT"D" STORMWATER STRUCTURAL CONTROL MAINTENANCE CHECKLIST Facility Name Facility Agreement No. Basin/Pond Inspected By: Date Type of Inspection: Annual Routine Monthti,, Storm Event ( Days since event) Maintenance Maintenance Inspected Required Performed Notes Routine InspectionslMointenonce Mowing Outlet Structure(Inspection and removal of trash,debris and sediment Trash and debris removal from detention basin Inspection of irrigation Sytem Non-Routine InspedionslMaintenance Inpsection and Maintenance of earthen banks and dams Inspection of existing vegetation.If more than 30%is un-protected,re-vegetate. Inspect sedimentation within the detention basin.If the detention basin volume is reduced by more than 10%,remove sediment. Page 1 of 2 EXHIBIT"D" STORMWATER STRUCTURAL CONTROL MAINTENANCE CHECKLIST Facility Name Facility Agreement No. Basin/Pond Inspected By: Date Type of Inspection: Annual Routine Monthly Storm Event (_Days since event) Maintenance Maintenance Inspected Required Performed Notes Inspect outfall structures,trickle channels and outer structural elements.Repair or replace if damage is observed. Inspect Rip-rap at spillway.Repair if needed. Inspect storm drainage pipes for accumulation of trash sediment and debris. Remove if observed. Inspect storm drainage piping for cracks or other damage.If structural integrity is affected,repair or replace. Plans for correcting deficiencies Signature: Owner's Representative Date: Page 2 of 2