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HomeMy WebLinkAboutContract 63880Date Received: 8/27/2025 Permit No.: SWFMA-25-0056 1:52 p.m. 63880 Time Received: City Secretary No.: STORMWATER FACILITY MAINTENANCE AGREEMENT THIS AGREEMENT, made and entered into this 27th day of August , 2025, by and between Blue Mound Stone Partners, LP, a Texas limited partnership, acting by and through Matthew MacConnell, its duly authorized Vice President, 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 a tract of land situated in the Josiah Walker Survey, Abstract No. 1602, City of Fort Worth, Tarrant County, Texas according to the deed recorded in Document No. D222006700, 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 Dutch Bros Coffee TX0509 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 storm water 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 Landowner, its successors and assigns, the location and dimensions of which is shown and STORMWATER FACILITY MAINTENANCE AGREEMENT OFFICIAL RECORD Rev. 03/01/2022 BN CITY SECRETARY 1 FT. WORTH, TX 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 ensure the 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 of inspection is to follow-up on reported deficiencies and/or to respond to STORMWATER FACILITY MAINTENANCE AGREEMENT 2 Rev. 03/01/2022 BN 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, fail 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 THE CITY OF FORT WORTH, ITS AGENTS, SERVANTS AND STORMWATER FACILITY MAINTENANCE AGREEMENT 3 Rev. 03/01/2022 BN 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 FACILITY 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 boundaries of the Property in which the Facility is located as outlined on Exhibit "A" but this paragraph shall not preclude construction of other improvements within the boundaries of the Property in which the Facility is located, which do not impede drainage. Landowner covenants and agrees that no habitable building shall be erected on the above property abutting such boundaries of the Property in which is Facility is located, 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 owner's association. STORMWATER FACILITY MAINTENANCE AGREEMENT 4 Rev. 03/01/2022 BN Executed this 27th day of August CITY OF FORT WORTH Jesica McEachern Assistant City Manager City of Fort Worth Date: 08/27/2025 Approved as to Form and Legality: M,, fCwi� v APv)&rg-, It M. Kevin Anders, II (Aug 25, 2025 13:43:43 CDT) M. Kevin Anders, II City Assistant Attorney City Attorney's Office Date: 08/25/2025 ATTEST. of FQgT��pa C\\�w ��'v'�aQQp nEXASod Jannette S. Goodall City Secretary Date: 08/27/2025 2025. LANDOWNER Blue Mound Stone Partners, LP a Texas limited partnership By: MALOUF INTERESTS, INC. a Texas corporation it general pa ner /t By: Ma hew Macdonnell Its: Vic President Date: OF $ 9 Contract Compliance Manager: By signing, I acknowledge that I am the person responsible for the monitoring and administration of this contract, including ensuring all performance and reporting Kandice Merrick Planning Manager Date: 08/25/2025 OFFICIAL RECORD CITY SECRETARY FT. WORTH, TX STORMWATER FACILITY MAINTENANCE AGREEMENT 55 Rev. 03/01/2022 BN STATE OF TEXAS § COUNTY OF TARRANT § This instrument was acknowledged before me on August 27th, 2025 by Jesica McEachern, Assistant City Manager of the City of Fort Worth, on behalf of the City of Fort Worth. Notary Public, State of Texas Pa�> KATHLEEN BRADFORD Notary Public *®* STATE OF TEXAS Notary I.D. 72197197 "soF My Comm. Exp. Apr. 12, 2027 LANDOWNER STATE OF bvu C, 5 § JOSEPH ASKEW COUNTY OF 1' l!� S My Notary ID # 130226940 § Y. '•y:; o� ;E±'•� Expires June 19, 2027 BEFORE ME, the undersigned authority, a Notary Public in and for the State of on this day personally appeared 4kA4-' Ma c.-- Lp'-�'/ie--1 (name), V ( C"e- }�� e 5-1 c.Ce.1 f (title), known to me to be the person whose name is subscribed to the foregoing instrument, and acknowledged to me that he/she executed the same for the purposes and consideration therein expressed, as the act and deed of �3 1v -e- 44oji j S 6✓ e- Pcir- rna4s L P (entity), a I-[,r�,s ��v��l� ►)c,v}�,e�s1�c� (entity type) and in the capacity therein stated. ' GIVEN UNDER MY HAND AND SEAL OF OFFICE this clay Of Aof f" , 20,15 —� Nottgg uM@lic, State of JOSEPH ASKEW *: My Notary ID # 130226940 Expires June 19, 2027 STORMWATER FACILITY MAINTENANCE AGREEMENT 6 Rev. 03/01/2022 BN A EXHIBIT "A" LEGAL DESCRIPTION STORMWATER FACILITY MAINTENANCE AGREEMENT Rev. 03/01/2022 BN PROJECT SITE4. m " cc 0. 4 .arryon Ridge 1l Western Center Bkvd North l� 7 k CP7 1E 5 �a Qua Watauga Rd Watauu• na VICINITY MAP DUTCH BROS. COFFEE TX0509 6800 BLUE MOUND ROAD CITY PROJECT NO. 104891 MAPSCO 034V CITY COUNCIL DISTRICT #2 DUNAWAY JOB NO. B008075.001 wDUNAWAY 550 Bailey Avenue a Suite 400 • Fort Worth, Texas 76107 Tel: 817.335.1121 TEXAS REGISTERED SURVEYING FIRM NO. 10098100 ENGINEER: DUNAWAY ASSOCIATES L.P. 550 BAILEY AVENUE STE. 400 FORT WORTH, TEXAS 76107 PHONE: (817) 335-1121 CONTACT: CHRIS BIGGERS, PE NORTH cRAPMc SCAI£• t ..%I _ _ THE MciDRv 6RauP, uc -T. NO 02100T5T5 P.R.TC.i. 1 T — — I LOT 2 wxi�a w f AS WME waYW SR,L .ARB�B. �.. 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BLOCK I W I N D R O S E LANDSURVEYING I PLATTING xw RLaalnARoxN. , II,rnRrose,aweM.eow SPENCER BUSCITY SOPP W FORT R1DITION TO THB SITUATED IN TIM JOSIAH WALKER SURVEY, ABSTRACT NUMBER L602 °xnwx,v s wrt A o ee nr Ru ,°awo_ owns CITY OF FORT WORTH, TARRANT COUNTY, TERAS PREPAREDON:0IN9/PM4 L . eerraRR i�A..l,ao-a'name»,ma�.wa mN Pur RE—MM IN DOCUN xNMMem °A� �o Ln LL 0 < o f� 0 z� :DjE 00 0 LU N v 77 J m F— CC O z EXHIBIT "A" STORMWA TER FACILITY MAINTENANCE AGREEMENT SI TUA TED IN THE JOSIAH WALKER SURVEY, ABSTRACT NO. 1602, CITY OF FORT WORTH, TARRANT COUNTY, TEXAS 15' WATER LINE EASEMENT VOLUME 9016, PAGE 627 D.R.T.C.T. BLUE MOUND STONE PARTNERS, LP DOCUMENT NUMBER D222006700 D.R.T.C.T. N89'08'44"E 110.80' w 4,990 SQUARE FEET / 0.114 ACRE STORMWATER FACILITY 'R �p MAINTENANCE AGREEMENT 0 N IS89-10.00"E N89'10'00'W 57.55' POINT OF 110.85' BEGINNING POINT OF COMMENCING LOT 1, BLOCK 1 SPENCER BUSINESS PARK CABINET A, PAGE 5953 P.R.T.C.T. C.C.D. NO. = COUNTY CLERK'S DOCUMENT NUMBER D.R.T.C.T. = DEED RECORDS, TARRANT COUNTY, TEXAS P.R.T.C.T. = PLAT RECORDS, TARRANT COUNTY, TEXAS I 15' SANITARY SEWER J I EASEMENT D220307772 D.R. T.C.T. A%Q- A metes and bounds description of DUNAWAY even date accompanies drawing. 550 Bailey Avenue • suite 400 • Fort Worth, Texas 76107 Tel: 817.335.1121 DATE: JUNE 27, 2025 TEXAS REGISTERED SURVEYING FIRM NO. 10098100 0 50' SCALE FEET 1 "= 50' LOT 2, BLOCK A BLUE CENTER ADDITION DOCUMENT NUMBER D220307772 P.R.T.C.T. 15' SANITARY SEWER EASEMENT D220,07772 D.R.T.C.T. A,'*X�STF 0* cam: �F W FQ .S STEPHEN R. GLOSUP 5570 941 S.iiO••yO SUR`�� 06/27/2025 PAGE 1 OF JOB NO. B008075.001 EXHIBIT "A" STORMWA TER FACILITY MAINTENANCE AGREEMENT SI TUA TED IN THE JOSIAH WALKER SURVEY, ABSTRACT NO. 1602, CITY OF FORT WORTH, TARRANT COUNTY, TEXAS PROPERTY DESCRIPTION BEING a tract of land situated in the Josiah Walker Survey, Abstract Number 1602, City of Fort Worth, Tarrant County, Texas and being a part of that certain tract of land described by deed to Blue Mound Stone Partners, LP, recorded in County Clerk's Document No. D222006700, Deed Records, Tarrant County, Texas, said tract of land being more particularly described by metes and bounds as follows: COMMENCING at a point for the southwest corner of said Blue Mound Stone Partners tract, the northwest corner of Lot 1, Block 1, Spence Business Park, an Addition to the City of Fort Worth, according to the plat recorded in Cabinet A, Slide 5953, Plat Records, Tarrant County, Texas, and in the east right—of—way of Blue Mound Road/FM 156 (a 120' width right—of—way); South 89°10'00" East, with the south line of said Blue Mound Stone Partners tract, and with the north line of said Lot 1, Block 1, Spencer Business Park, a distance of 57.55 feet to the point of BEGINNING of herein described tract; THENCE North 00°51'16" West, departing the north line of said Lot 1, Block 1, Spencer Business Park and crossing into said Blue Mound Stone Partners tract, a distance of 43.41 feet to a point; THENCE North 89°08'44" East, continuing across said Blue Mound Stone Partners tract, a distance of 110.80 feet to a point; THENCE South 00'51'16" East, continuing across said Blue Mound Stone Partners tract, a distance of 46.67 feet to a point in the south line of said Blue Mound Stone Partners tract and the north line of said Lot 1, Block 1, Spencer Business Park; THENCE North 89°10'00" West, with the south line of said Blue Mound Stone Partners tract, with the north line of said Lot 1, Block 1, Spencer Business Park, a distance of 110.85 feet to the POINT OF BEGINNING and containing a calculated area of 4,990 square feet or 0.114 acres of land. NOTES: The basis of bearings for this Easement is the Texas Coordinate System of 1983, North Central Zone, 4202, based upon GPS measurements, according to the GPS Reference Network. A drawing of even date accompanies this metes and bounds description. The metes and bounds description contained herein was compiled from information contained in recorded documents and does not reflect the results of an on the ground survey. DUNAWAY JOB NO. B008075.001 Stephen . Glosup 0 F Registered Professional Land Surveyor �F .•••••• T Texas Registration No. 5570 A, - S T fR'. ' srg@dunaway.com C� 7 June 27, 2025 STEPHEN R. GLOSUP DUNAWA 5570 Y .,s,s,,\.'* S U R `I 550 Bailey Avenue • Suite 400 • Fort Worth, Texas 76107 Tel: 817.335.1121 TEXAS REGISTERED SURVEYING FIRM NO. 10098100 PAGE 2 OF 2 EXHIBIT "A" 5TORMWATER FACILITY MAINTENANCE AGREEMENT SITUATED IN THE JOSIAH WALKER SURVEY, ABSTRACT NO. 1602 City of Fort Worth, Tarrant County, Texas. EXHIBIT "B" DESIGN PLAN AND SPECIFICATIONS STORMWATER FACILITY MAINTENANCE AGREEMENT Rev. 03/01/2022 BN DU"FqH BROS COFFEE 950 S.F. J41NGLE STORY) FF-691.95 I 11/1111111�,1�/1 \ 0 o. + STA 0+00.00 - STRM-C ' CONNECT TO \ UNDERGROUND DETENTION POND CHAMBERS FL 12" IN = 686.05 N N 7000495.70 E 2324442.14 \ STA 0+ 19.77 - STRM-A - CONNECT TO EX. 4 X4' DROP INLET i �\ MODIFY RIM ELEVATION AND REMOVE GRATE WITH 24 L FLAT TOP FL 24" IN = 685.15 E FL JO" OUT = 685.12 SW r N 7000462.36 - - - - I E 2324391.61 I -5 L^ 24" HDPE ASTM F2648 ® 0.3390 1- I I I I I I UNDERGROUND DETENTION SYSTEM = CAPACITY VOLUME.- 8,925 C.F. - DISCHARGE: 1.62 CFS -- - - - OUTLET STRUCTURE' - - NYLOPLAST DRAIN BASIN w/ 1` INTEGRATED DUCTILE IRON FRAME - (�1 & GRATE (AASHTO H-20) NOTE: NO SAVED OR PROPOSED TREES ARE WITHIN THE SWFMA BOUNDARY STA 0+24.17 - S7RM- INSTALL: 12"x12" 45' H FL 12" IN = 686.30 N FL 12" IN = 686.30 NE FL 12" OUT = 686.30 N 7000519.88 E 2324442.34 STA 0+00.00 - STRM-B CONNECT TO UNDERGROUND DETENTION POND CHAMBERS WA 5' DIA STRUCTURE (SEE PLANS BY OTHERS) r` FL 12 " IN = 686. 11 S f � 7000465.32 E.2324457.10 N -• 1 ` N� SWFMA - -• BOUNDARY • i ? STA 0+27.12 - S7RM-A G \\ : D CJ -CT - - =}7jPE ASTM F2648 ® 1.059 CONTROL STRUCTURE �/ 229. �7� FL 24" OUT = 685.17 W STA 0+04.20 - S7RM-B N 7000463.80 ;� INSTALL: 12" 45- BEND X E 2324398.82 FL 12" IN = 686.15 SW GRATE INLET (EMERGENCY `-Comm OVERFLOW) DUNAWAY 550 Barley Avenue • Suite 400 • Fort Worth, Texas 76107 Tel: 817.335.1121 (TX REG. F-1114) FL 12" OUT = 686.15 N - N 7000461.13 ,E 2324457.30 EXHIBIT B DUTCH BROS COFFEE 6800 N BLUE MOUND ROAD ACCESS MANHOLE AT PAVEMENT GRADE i I I TOP OF BOX= 690.08 ! TOP OF OUTLET PLATE FL EL=688.60 I \ OUTLET CONTROL PLATE 3.5—INCH WIDE WEIR _ J� FL EL=686.80 I 5—INCH ORIFICE FL EL=685.17 24" DIA. OUTLET PIPE ON WEST FACE OF BOX FL ELEV=685.17 CONNECTION TO ADS PIPE DETENTION SYSTEM EAST FACE OF BOX (REFERENCE ADS DRAWINGS FOR CONNECTION) UNDERGROUND STORAGE OUTLET STRUCTURE DETAIL � W D U N AWA 550 Bailey Avenue • Suite 400 • Fort Worth, Texas 76107 Tel: 817.335.1121 (TX REG. F-1114) NOT TO SCALE -*'t71:1 = r DUTCH BROS COFFEE 6800 N BLUE MOUND ROAD PLOTTED BY: Aaron Vasquez ON: Monday, October 21, 2024 AT: 2:55 PM FILEPATH: P:\008000\8075\001\Civil\CAD\Exhibits\SWFMA\Exhibit B.dwg CA 00 O ov ZC n C m O� ZO v� 7v m O m D v O U1 O LA O (Jl O I I STAI CoNyVE O+b9.717 T T NI E ST I -A 4.C4' DR / LE MOD AND R O GRATE Wl II III FLA TP FL 4" N 6 5.1 STA 0+ 7.1 S7?'A4-A COh Ou VECT T Ai STR JC71JRE FL 24m OUT = 1585.17 T V O (n O CA CA 00 00 tG tG O O o (n o Ch O (n v. N rn z� o:10 zo �o Scenario Calculation Summary Scenario Summary ID 18 Label 100 Year Notes Active Topology Active Topology Hydrology Hydrology Rainfall Runoff 100 Year Physical Physical Initial Condition Initial Condition Boundary Condition Boundary Condition Infiltration and Inflow Infiltration and Inflow Output Output User Data Extensions User Data Extensions PondPack Engine Calculation Options Base Calculation Options Output Summary Output Increment 0.050 hours Duration Rainfall Summary Return Event Tag 100 Rainfall Type Total Depth (N/A)in Storm Event Frequency Area (years) (acres) 100 1 0.8101 Label Scenario CM-1 100 Year 0-1 100 Year PO-1 (IN) 100 Year PO-1 (OUT) 100 Year Label Type 12.000 hours I-D-F Storm User Defined IDF Table - 1 - 100 Year Modified Rational Method Grand Summary Adjusted C Duration Intensity Flow (Peak) Flow Volume Volume Coefficient (hours) (in/h) (ft3/s) (Allowable) (inflow) (Storage) (ft3/s) (ac-ft) (ac-ft) 0.9001 0.4001 6.5091 4.78 1 2.061 0.1581 0.092 1 Executive Summary (Nodes) Return Truncation Hydrograph Time to Peak Flow Maximum Maximum Event Volume Peak (ft3/s) Water Pond (years) (ac-ft) (hours) Surface Storage Elevation (ac-ft) (ft) 100 None 0.158 0.200 4.78 (N/A) (N/A) 100 None 0.158 0.500 1.62 (N/A) (N/A) 100 None 0.158 0.200 4.78 (N/A) (N/A) 100 None 0.158 0.500 1.62 687.59 0.122 Executive Summary (Links) Location Hydrograph Peak Time Peak Flow End Point Node Flow Volume (hours) (ft3/s) (ac-ft) Outlet-1 I Pond Outlet Upstream I 0.1581 0.200 I 4.78 I PO-1 Outlet-1 Pond Outlet Outflow 0.158 0.500 1.62 PO-1 Bentley Systems, Inc. Haestad Methods Solution 8075 DB-Blue Mound Rd- Pond.ppc Center 8/1/2025 27 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 Direction Pond Inflow Pond Outflow PondPack CONNECT Edition [10o2.00.01] Page 1 of 2 Scenario Calculation Summary Executive Summary (Links) Label Type Location Hydrograph Peak Time Peak Flow End Point Node Flow Volume (hours) (ft3/s) Direction (ac-ft) Outlet-1 Pond Outlet Link 0.158 0.500 1.62 Outlet-1 Pond Outlet Downstream 0.158 0.500 1.62 0 -1 EXHIBIT B D U N AWAY DUTCH BROS COFFEE 550 Bailey Avenue •Suite 400 • Fort Worth, Texas 76107 Tel: 817.335.1121 6800 N BLUE MOUND ROAD .33 (TX REG. F-1114) Project: REV2 Dutch Bros Coffee (S478309) Chamber Model - 7- SC-800 Units - Imperial Number of Chambers - 87 Number of End Caps - 22 Voids in the stone (porosity) - 1 40 1% Base of Stone Elevation - 1 685.17 ft Amount of Stone Above Chambers - 12 in Amount of Stone Below Chambers - 1 9 lin Area of system - 3465 Isf Min. Area - 2972 sf min. area StormTech SC-800 Cumulative Storage Volumes Height of I ncremental Single Incremental Incremental Incremental System Chamber Single End Cap Chambers End Cap (inches) (cubic feet) (cubic feet) (cubic feet) (cubic feet) 54 0.00 0.00 0.00 0.00 53 0.00 0.00 0.00 0.00 52 0.00 0.00 0.00 0.00 51 0.00 0.00 0.00 0.00 50 0.00 0.00 0.00 0.00 49 0.00 0.00 0.00 0.00 48 0.00 0.00 0.00 0.00 47 0.00 0.00 0.00 0.00 46 0.00 0.00 0.00 0.00 45 0.00 0.00 0.00 0.00 44 0.00 0.00 0.00 0.00 43 0.00 0.00 0.00 0.00 42 0.07 0.00 6.48 0.01 41 0.20 0.00 17.12 0.08 40 0.29 0.01 24.83 0.14 39 0.51 0.01 43.94 0.19 38 0.74 0.01 64.43 0.30 37 0.89 0.02 77.63 0.53 36 1.01 0.03 88.29 0.74 35 1.12 0.04 97.45 0.95 34 1.21 0.05 105.51 1.16 33 1.30 0.06 112.78 1.37 32 1.37 0.07 119.38 1.55 31 1.44 0.08 125.42 1.72 30 1.51 0.09 130.99 1.89 29 1.57 0.09 136.19 2.06 28 1.62 0.10 141.04 2.25 27 1.67 0.11 145.58 2.42 26 1.72 0.12 149.85 2.59 25 1.77 0.12 153.86 2.73 24 1.81 0.13 157.65 2.82 23 1.85 0.14 161.22 3.00 22 1.89 0.14 164.59 3.15 21 1.93 0.15 167.77 3.19 20 1.96 0.15 170.78 3.28 19 2.00 0.16 173.62 3.43 18 2.03 0.16 176.32 3.60 17 2.06 0.17 178.86 3.69 16 2.08 0.17 181.27 3.77 15 2.11 0.18 183.54 3.86 14 2.13 0.17 185.69 3.81 13 2.16 0.18 187.71 3.99 12 2.18 0.18 189.62 4.04 11 2.20 0.19 191.42 4.09 10 2.22 0.13 193.38 2.91 9 0.00 0.00 0.00 0.00 8 0.00 0.00 0.00 0.00 7 0.00 0.00 0.00 0.00 6 0.00 0.00 0.00 0.00 5 0.00 0.00 0.00 0.00 4 0.00 0.00 0.00 0.00 3 0.00 0.00 0.00 0.00 2 0.00 0.00 0.00 0.00 1 0.00 0.00 0.00 0.00 QM N AWA 550 Barley Avenue • Suite 400 • Fort Worth, Texas 76107 Tel: 817.335.1121 (TX REG. F-1114) Incremental Incremental Ch, Cumulative Stone EC and Stone System Elevation (cubic feet) (cubic feet) 115.50 115.50 8924.70 689.67 115.50 115.50 8809.20 689.59 115.50 115.50 8693.70 689.50 115.50 115.50 8578.20 689.42 115.50 115.50 8462.70 689.34 115.50 115.50 8347.20 689.25 115.50 115.50 8231.70 689.17 115.50 115.50 8116.20 689.09 115.50 115.50 8000.70 689.00 115.50 115.50 7885.20 688.92 115.50 115.50 7769.70 688.84 115.50 115.50 7654.20 688.75 112.91 119.39 7538.70 688.67 108.62 125.82 7419.30 688.59 105.52 130.48 7293.49 688.50 97.85 141.98 7163.01 688.42 89.61 154.34 7021.03 688.34 84.24 162.40 6866.69 688.25 79.89 168.92 6704.29 688.17 76.14 174.54 6535.37 688.09 72.83 179.50 6360.83 688.00 69.84 183.99 6181.33 687.92 67.13 188.06 5997.34 687.84 64.65 191.78 5809.28 687.75 62.35 195.23 5617.50 687.67 60.20 198.45 5422.27 687.59 58.18 201.47 5223.82 687.50 56.30 204.30 5022.34 687.42 54.53 206.96 4818.04 687.34 52.86 209.45 4611.08 687.25 51.31 211.78 4401.62 687.17 49.81 214.03 4189.84 687.09 48.41 216.14 3975.81 687.00 47.12 218.08 3759.67 686.92 45.88 219.93 3541.60 686.84 44.68 221.73 3321.66 686.75 43.53 223.45 3099.93 686.67 42.48 225.03 2876.48 686.59 41.49 226.52 2651.45 686.50 40.54 227.94 2424.93 686.42 39.70 229.20 2196.99 686.34 38.82 230.52 1967.79 686.25 38.04 231.69 1737.27 686.17 37.30 232.80 1505.58 686.09 36.98 233.27 1272.77 686.00 115.50 115.50 1039.50 685.92 115.50 115.50 924.00 685.84 115.50 115.50 808.50 685.75 115.50 115.50 693.00 685.67 115.50 115.50 577.50 685.59 115.50 115.50 462.00 685.50 115.50 115.50 346.50 685.42 115.50 115.50 231.00 685.34 115.50 115.50 115.50 685.25 EXHIBIT B DUTCH BROS COFFEE 6800 N BLUE MOUND ROAD PROJECT INFORMATION ALYSSA SAMARCO ENGINEERED /// MANAGER 214-536-9867 ALYSSA SAMARCO@ADSPIPE.COM 111AW. SiteAssist' BRYAN TUCKER FOR TECH ADS SALES REP 682-216-0795 INSTALLATIOONN INSNSTRUCTIONS BRYAN.TUCKER@ADSPIPE.COM Advanced Drainage Systems, Inc. VISIT OUR APP PROJECT NO. S478309 DUTCH BROS COFFEE (6800 N BLUE MOUND RD) SC-800 STORMTECH CHAMBER SPECIFICATIONS 1. CHAMBERS SHALL BE STORMTECH SC-800 FORT WORTH, TX, USA IMPORTANT - NOTES FOR THE BIDDING AND INSTALLATION OF THE SC-800 SYSTEM 2. CHAMBERS SHALL BE ARCH -SHAPED AND SHALL BE MANUFACTURED FROM VIRGIN, IMPACT -MODIFIED POLYPROPYLENE COPOLYMERS 3. CHAMBERS SHALL MEET THE REQUIREMENTS OF ASTM F2418, "STANDARD SPECIFICATION FOR POLYPROPYLENE (PP) CORRUGATED WALL STORMWATER COLLECTION CHAMBERS" 4. CHAMBER ROWS SHALL PROVIDE CONTINUOUS, UNOBSTRUCTED INTERNAL SPACE WITH NO INTERNAL SUPPORTS THAT WOULD IMPEDE FLOW OR LIMIT ACCESS FOR INSPECTION. 5. THE STRUCTURAL DESIGN OF THE CHAMBERS, THE STRUCTURAL BACKFILL, AND THE INSTALLATION REQUIREMENTS SHALL ENSURE THAT THE LOAD FACTORS SPECIFIED IN THE AASHTO LRFD BRIDGE DESIGN SPECIFICATIONS, SECTION 12.12, ARE MET FOR 1) LONG -DURATION DEAD LOADS AND 2) SHORT -DURATION LIVE LOADS, BASED ON THE AASHTO DESIGN TRUCK WITH CONSIDERATION FOR IMPACT AND MULTIPLE VEHICLE PRESENCES. 6 CHAMBERS SHALL BE DESIGNED AND ALLOWABLE LOAD CONFIGURATIONS DETERMINED IN ACCORDANCE WITH ASTM F2787, "STANDARD PRACTICE FOR STRUCTURAL DESIGN OF THERMOPLASTIC CORRUGATED WALL STORMWATER COLLECTION CHAMBERS". LOAD CONFIGURATIONS SHALL INCLUDE 1) INSTANTANEOUS (<l MIN) AASHTO DESIGN TRUCK LIVE LOAD ON MINIMUM COVER 2) MAXIMUM PERMANENT (75-YR) COVER LOAD AND 3) ALLOWABLE COVER WITH PARKED (1-WEEK) AASHTO DESIGN TRUCK. 7. REQUIREMENTS FOR HANDLING AND INSTALLATION. • TO MAINTAIN THE WIDTH OF CHAMBERS DURING SHIPPING AND HANDLING, CHAMBERS SHALL HAVE INTEGRAL, INTERLOCKING STACKING LUGS. • TO ENSURE A SECURE JOINT DURING INSTALLATION AND BACKFILL, THE HEIGHT OF THE CHAMBER JOINT SHALL NOT BE LESS THAN 2". • TO ENSURE THE INTEGRITY OF THE ARCH SHAPE DURING INSTALLATION, a) THE ARCH STIFFNESS CONSTANT SHALL BE GREATER THAN OR EQUAL TO 750 LBS/FT/% . THE ASC IS DEFINED IN SECTION 6.2.8 OF ASTM F2418. AND b) TO RESIST CHAMBER DEFORMATION DURING INSTALLATION AT ELEVATED TEMPERATURES (ABOVE 73" F / 23" C), CHAMBERS SHALL BE PRODUCED FROM REFLECTIVE GOLD OR YELLOW COLORS. 8. ONLY CHAMBERS THAT ARE APPROVED BY THE SITE DESIGN ENGINEER WILL BE ALLOWED. UPON REQUEST BY THE SITE DESIGN ENGINEER OR OWNER, THE CHAMBER MANUFACTURER SHALL SUBMIT A STRUCTURAL EVALUATION FOR APPROVAL BEFORE DELIVERING CHAMBERS TO THE PROJECT SITE AS FOLLOWS: • THE STRUCTURAL EVALUATION SHALL BE SEALED BY A REGISTERED PROFESSIONAL ENGINEER. • THE STRUCTURAL EVALUATION SHALL DEMONSTRATE THAT THE SAFETY FACTORS ARE GREATER THAN OR EQUAL TO 1.95 FOR DEAD LOAD AND 1.75 FOR LIVE LOAD, THE MINIMUM REQUIRED BY ASTM F2787 AND BY SECTIONS 3 AND 12.12 OF THE AASHTO _RFD BRIDGE DESIGN SPECIFICATIONS FOR THERMOPLASTIC PIPE • THE TEST DERIVED CREEP MODULUS AS SPECIFIED IN ASTM F2418 SHALL BE USED FOR PERMANENT DEAD LOAD DESIGN EXCEPT THAT IT SHALL BE THE 75-YEAR MODULUS USED FOR DESIGN. 9 CHAMBERS AND END CAPS SHALL BE PRODUCED AT AN ISO 9001 CERTIFIED MANUFACTURING FACILITY. 10. MANIFOLD SIZE TO BE DETERMINED BY SITE DESIGN ENGINEER. SEE TECH NOTE #6.32 FOR MANIFOLD SIZING GUIDANCE. DUE TO THE ADAPTATION OF THIS CHAMBER SYSTEM TO SPECIFIC SITE AND DESIGN CONSTRAINTS, IT MAY BE NECESSARY TO CUT AND COUPLE ADDITIONAL A PIPE TO STANDARD MANIFOLD COMPONENTS IN THE FIELD. 11. ADS DOES NOT DESIGN OR PROVIDE MEMBRANE LINER SYSTEMS. TO MINIMIZE THE LEAKAGE POTENTIAL OF LINER SYSTEMS, THE MEMBRANE LINER SYSTEM SHOULD BE DESIGNED BY A KNOWLEDGEABLE GEOTEXTILE PROFESSIONAL AND INSTALLED BY A QUALIFIED CONTRACTOR. 1. STORMTECH SC-800 CHAMBERS SHALL NOT BE INSTALLED UNTIL THE MANUFACTURER'S REPRESENTATIVE HAS COMPLETED A PRE -CONSTRUCTION MEETING WITH THE INSTALLERS 2. STORMTECH SC-800 CHAMBERS SHALL BE INSTALLED IN ACCORDANCE WITH THE "STORMTECH SC-31 D/SC-740/SC-800/DC-780 CONSTRUCTION GUIDE". 3 CHAMBERS ARE NOT TO BE BACKFILLED WITH A DOZER OR AN EXCAVATOR SITUATED OVER THE CHAMBERS. STORMTECH RECOMMENDS 3 BACKFILL METHODS: • STONESHOOTER LOCATED OFF THE CHAMBER BED. • BACKFILL AS ROWS ARE BUILT USING AN EXCAVATOR ON THE FOUNDATION STONE OR SUBGRADE. • BACKFILL FROM OUTSIDE THE EXCAVATION USING A LONG BOOM HOE OR EXCAVATOR. 4. THE FOUNDATION STONE SHALL BE LEVELED AND COMPACTED PRIOR TO PLACING CHAMBERS. 5. JOINTS BETWEEN CHAMBERS SHALL BE PROPERLY SEATED PRIOR TO PLACING STONE. 6 MAINTAIN MINIMUM - 3" (75 mm) SPACING BETWEEN THE CHAMBER ROWS 7. EMBEDMENT STONE SURROUNDING CHAMBERS MUST BE A CLEAN, CRUSHED, ANGULAR STONE OR RECYCLED CONCRETE; AASHTO M43 #3, 357, 4, 467, 5, 56, OR 57. 8. THE CONTRACTOR MUST REPORT ANY DISCREPANCIES WITH CHAMBER FOUNDATION MATERIALS BEARING CAPACITIES TO THE SITE DESIGN ENGINEER. 9. ADS RECOMMENDS THE USE OF "FLEXSTORM CATCH IT" INSERTS DURING CONSTRUCTION FOR ALL INLETS TO PROTECT THE SUBSURFACE STORMWATER MANAGEMENT SYSTEM FROM CONSTRUCTION SITE RUNOFF NOTES FOR CONSTRUCTION EQUIPMENT 1. STORMTECH SC-800 CHAMBERS SHALL BE INSTALLED IN ACCORDANCE WITH THE "STORMTECH SC-310/SC-740/SC-800/DC-780 CONSTRUCTION GUIDE". 2. THE USE OF CONSTRUCTION EQUIPMENT OVER SC-800 CHAMBERS IS LIMITED: • NO EQUIPMENT IS ALLOWED ON BARE CHAMBERS • NO RUBBER TIRED LOADERS, DUMP TRUCKS, OR EXCAVATORS ARE ALLOWED UNTIL PROPER FILL DEPTHS ARE REACHED IN ACCORDANCE WITH THE "STORMTECH SC-310/SC-740/SC-B00/DC-780 CONSTRUCTION GUIDE". • WEIGHT LIMITS FOR CONSTRUCTION EQUIPMENT CAN BE FOUND IN THE "STORMTECH SC-310/SC-740/SC-800/DC-780 CONSTRUCTION GUIDE". 3. FULL 36" (900 mm) OF STABILIZED COVER MATERIALS OVER THE CHAMBERS IS REQUIRED FOR DUMP TRUCK TRAVEL OR DUMPING USE OF A DOZER TO PUSH EMBEDMENT STONE BETWEEN THE ROWS OF CHAMBERS MAY CAUSE DAMAGE TO THE CHAMBERS AND IS NOT AN ACCEPTABLE BACKFILL METHOD. ANY CHAMBERS DAMAGED BY THE "DUMP AND PUSH" METHOD ARE NOT COVERED UNDER THE STORMTECH STANDARD WARRANTY. CONTACT STORMTECH AT 1-800-821-6710 WITH ANY QUESTIONS ON INSTALLATION REQUIREMENTS OR WEIGHT LIMITS FOR CONSTRUCTION EQUIPMENT. PvPP LAYOUT PR(; 0 ELEVATIONS: WEST END QQQQ CHAMBERS s6996.ss77 M IMUM ALLOWABLE GRADE (TOP OF PAVEMENT/UNPAVED) 22 ��ry H ��-�00 END CAPS 690.42 MINIMUM ALLOWABLE GRADE (UNPAVED WITH TRAFFIC) 12 STONE ABOVE (in) 689.92 MINIMUM ALLOWABLE GRADE (UNPAVED NO TRAFFIC) 9 STONE BELOW (in) 689.92 MINIMUM ALLOWABLE GRADE (BASE OF FLEXIBLE PAVEMENT) 40 %STONE VOID 689.92 MINIMUM ALLOWABLE GRADE (TOP OF RIGID PAVEMENT) 8,925 INSTALLED SYSTEM VOLUME (CF) 689.17 STONE STONE INCLUDED) 618 17 TT9OPP QOF 3.465 SYSTEM AREA (82) 686.05 72" BO��Cf�CO�HAMBER NECTION INVERT 279 SYSTEM PERIMETER (R) 685.92 BOTTOM OF SC-800 CHAMBER 685.17 UNDERDRAIN INVERT 685.17 BOTTOM OF STONE PROPOSED ELEVATIONS: EAST END 697.20 MAXIMUM ALLOWABLE GRADE (TOP OF PAVEMENT/UNPAVED) 690.96 IN MINIMUM ALLOWABLE GRADE (UNPAVED WITH TRAFFIC) 690.45 ALLOWABLE GRADE (UNPAVED NO TRAFFIC) 690.45 MINIMUM ALLOWABLE GRADE (BASE OF FLEXIBLE PAVEMENT) 690.45 MINIMUM ALLOWABLE GRADE TOP OF RIGID PAVEMENT) 689.70 TOP OF STONE 689.20 TOP OF SC-800 CHAMBER 687.12 18" TOP MANIFOLD/CONNECTION INVERT 686.64 24" ISOLATOR ROW PLUS CONNECTION INVERT 686.45 BOTTOM OF SC-800 CHAMBER 685.70 UNDERDRAIN INVERT 685.70 BOTTOM OF STONE CHAMBERS S BASE STONE TO BE SLOPED 0.50% UPPER END TO LOWER END, AS SHOWN ON PLAN. MINIMUM 6" BASE STONE REQUIRED. SEE PLAN (THIS PAGE) AND/OR OVERLAY PAGE FOR BASE STONE ELEVATIONS. M � N PART TYPE (PREFABRICATED EZ END CAP iIrnr-CORED END CAP (PRE -CORED END CAP IFLAMP IMANIFOLD PIPE CONNECTION 11 Rig INSPECTION PORT IPIPE CONNECTION MANIFOLD MANIFOLD 'INVERT ABOVE BASE OF CHAMBER TU- DESCRIPTION INVERT" MAX FLOW �AYOU� 4" BOTTOM PREFABRICATED EZ END CAP, PART#SCSOOECEZ / TYP OF ALL 24" BOTTOM Z - O 0 PLUS �F'R 00 ❑ Q ��Ny{EJ/C y/g� � �LATOR �9Q PE �% 12" kfOT RE END CAP, P�FtT#: SUTF IB CP TYP OF ALL 12" BOTTOMTIONS 8 Z C CONNECTIONS 60" Ud D INSTALL FLAMP ON 24" ACCESS PIPE /PART#' SC80024RAMP LLLL F w 9 Z E 18" x 18'. TOP MANIFOLD, ADS N-12 8.00" O F❑ U y V O F G 12" BOTTOM CONNECTIO (DESIGN BY ENGINEER /(tOy� jy 9THJj$) - - 1.60" 11.2 CFS IN O 3 H OCS (DESIGN BY ENGIN IId. I�iVV ((jj�) FHiERS) 1.62 CFS OUT LLI � N m W I 6" ADS N-12 DUAL WALL PERFORATED HDPE UNDERDRAIN m O N E vi J 4" SEE DETAIL m ry =- K 18"TOP CONNECTION 8.00" V o F A L M 12" X 12. BOTTOM MANIFOLD 12" X 12" BOTTOM MANIFOLD 1.60" 1.60" 4.6 CFS IN F o O ISOLATOR ROW PLUS (SEE DETAIL) PLACE MINIMUM 12.50' OF ADSPLUS625 WOVEN GEOTEXTILE OVER BEDDING STONE AND UNDERNEATH CHAMBER FEET FOR SCOUR PROTECTION AT ALL CHAMBER INLET ROWS — —BED LIMITS 51.57' V L I I I 58.68' I BOTTOM OF STONE: 685.17 V H F C B 16.43' BOTTOM OF STORMTECH SYSTEM @ 0.5% SLOPE 105.58' K J E 89.15' 44.45' Q K � NOTES D D&o • THE SITE DESIGN ENGINEER MUST REVIEW ELEVATIONS AND n3vmu zry wK IF NECESSARY ADJUST GRADING TO ENSURE THE CHAMBER enanozs zry -D COVER REQUIREMENTS ARE MET. I J•JI i 30.22' I— J• 4 G A D J BOTTOM OF STONE: 685.70 SHEET 2OF5 MATERIAL LOCATION ACCEPTABLE FILL MATERIALS: STORMTECH SC-800 CHAMBER SYSTEMS DESCRIPTION FINAL FILL: FILL MATERIAL FOR LAYER'D' STARTS FROM THE D TOP OF THE 'C' LAYER TO THE BOTTOM OF FLEXIBLE ANY SOILIROCK MATERIALS, NATIVE SOILS, OR PER ENGINEER'S PLANS PAVEMENT OR UNPAVED FINISHED GRADE ABOVE. NOTE THAT CHECK PLANS FOR PAVEMENT SUBGRADE REQUIREMENTS. PAVEMENT SUBBASE MAY BE PART OF THE'D' LAYER. INITIAL FILL: FILL MATERIAL FOR LAYER'C' STARTS FROM THE GRANULAR WELL -GRADED SOIL/AGGREGATE MIXTURES, <35% FINES OR TOP OF THE EMBEDMENT STONE ('B' LAYER) TO 15" (375 mm) PROCESSED AGGREGATE. C ABOVE THE TOP OF THE CHAMBER. NOTE THAT PAVEMENT SUBBASE MAY BE A PART OF THE'C' LAYER MOST PAVEMENT SUBBASE MATERIALS CAN BE USED IN LIEU OF THIS LAYER. EMBEDMENT STONE: FILL SURROUNDING THE CHAMBERS CLEAN, CRUSHED, ANGULAR STONE B FROM THE FOUNDATION STONE (W LAYER) TO THE 'C' LAYER OR RECYCLED CONCRETES ABOVE. FOUNDATION STONE: FILL BELOW CHAMBERS FROM THE CLEAN, CRUSHED, ANGULAR STONE A SUBGRADE UP TO THE FOOT (BOTTOM) OF THE CHAMBER. OR RECYCLED CONCRETES AASHTO MATERIAL COMPACTION / DENSITY REQUIREMENT CLASSIFICATIONS PREPARE PER SITE DESIGN ENGINEER'S PLANS PAVED N/A INSTALLATIONS MAY HAVE STRINGENT MATERIAL AND PREPARATION REQUIREMENTS AASHTO M145' BEGIN COMPACTIONS AFTER 12" (300 mm) OF MATERIAL OVER A-1 , A-2-4, A-3 THE CHAMBERS IS REACHED COMPACT ADDITIONAL LAYERS IN 6" (150 mm) MAX LIFTS TO A MIN. 95% PROCTOR DENSITY FOR OR WELL GRADED MATERIAL AND 95% RELATIVE DENSITY FOR PROCESSED AGGREGATE MATERIALS. ROLLER GROSS AASHTO M43' VEHICLE WEIGHT NOT TO EXCEED 12,000 Ibs (53 kN). DYNAMIC 3, 357, 4, 467, 5, 56, 57, 6, 67, 68, 7, 78, 8, 89, 9, 10 FORCE NOT TO EXCEED 20,000 Ibs (89 kN). AASHTO M43' NO COMPACTION REQUIRED. 3, 357, 4, 467, 5, 56, 57 AASHTO M43' PLATE COMPACT OR ROLL TO ACHIEVE A FLAT SURFACE z.a 3, 357, 4, 467, 5, 56, 57 PLEASE NOTE. 1. THE LISTED AASHTO DESIGNATIONS ARE FOR GRADATIONS ONLY. THE STONE MUST ALSO BE CLEAN, CRUSHED, ANGULAR FOR EXAMPLE, A SPECIFICATION FOR #4 STONE WOULD STATE: "CLEAN, CRUSHED, ANGULAR NO. 4 (AASHTO M43) STONE" 2. STORMTECH COMPACTION REQUIREMENTS ARE MET FORA' LOCATION MATERIALS WHEN PLACED AND COMPACTED IN 6" (150 mm) (MAX) LIFTS USING TWO FULL COVERAGES WITH A VIBRATORY COMPACTOR 3. WHERE INFILTRATION SURFACES MAY BE COMPROMISED BY COMPACTION, FOR STANDARD DESIGN LOAD CONDITIONS, A FLAT SURFACE MAY BE ACHIEVED BY RAKING OR DRAGGING WITHOUT COMPACTION EQUIPMENT. FOR SPECIAL LOAD DESIGNS, CONTACT STORMTECH FOR COMPACTION REQUIREMENTS. 4. ONCE LAYER'C' IS PLACED, ANY SOIL/MATERIAL CAN BE PLACED IN LAYER'D' UP TO THE FINISHED GRADE. MOST PAVEMENT SUBBASE SOILS CAN BE USED TO REPLACE THE MATERIAL REQUIREMENTS OF LAYER 'C' OR'D' AT THE SITE DESIGN ENGINEER'S DISCRETION 5. WHERE RECYCLED CONCRETE AGGREGATE IS USED IN LAYERS'A' OR'B' THE MATERIAL SHOULD ALSO MEET THE ACCEPTABILITY CRITERIA OUTLINED IN TECHNICAL NOTE 6.20 "RECYCLED CONCRETE STRUCTURAL BACKFILL". ADS GEOSYNTHETICS 601T NON -WOVEN GEOTEXTILE ALL AROUND CLEAN, CRUSHED, ANGULAR STONE IN A & B LAYERS PERIMETER STONE (SEE NOTE 4) EXCAVATION WALL (CAN BE SLOPED OR VERTICAL) 12" (300 mm) MIN SUBGRADE SOILS V­� (SEE NOTE 3) PAVEMENT LAYER (DESIGNED 1yBY SITE DESIGN ENGINEER) �wsTnLuB"n`OoTNTOMOFFLER—ING 1-1 1-1VTEwFaOREUNPAVED 15I „ 8/ ' INCR—EoEaT021 cszs mntl _ _,qly. + (375 mm)MIN* (2.4 m)MAX 3" (75 mm) MIN 6" (150 mm) MIN 1 I t 33" "THIS CROSS SECTION DETAIL REPRESENTS (838 mm) MINIMUM REQUIREMENTS FOR INSTALLATION. PLEASE SEE THE LAYOUT SHEET(S) FOR PROJECT SPECIFIC REQUIREMENTS. ' 6"(150mm)MIN (SEE NOTE 3) 12" (300 mm) MIN NOTES: 1. CHAMBERS SHALL MEET THE REQUIREMENTS OF ASTM F2418, "STANDARD SPECIFICATION FOR POLYPROPYLENE (PP) CORRUGATED WALL STORMWATER COLLECTION CHAMBERS" 2. SC-800 CHAMBERS SHALL BE DESIGNED IN ACCORDANCE WITH ASTM F2787 "STANDARD PRACTICE FOR STRUCTURAL DESIGN OF THERMOPLASTIC CORRUGATED WALL STORMWATER COLLECTION CHAMBERS". 3. THE SITE DESIGN ENGINEER IS RESPONSIBLE FOR ASSESSING THE BEARING RESISTANCE (ALLOWABLE BEARING CAPACITY) OF THE SUBGRADE SOILS AND THE DEPTH OF FOUNDATION STONE WITH CONSIDERATION FOR THE RANGE OF EXPECTED SOIL MOISTURE CONDITIONS. REFERENCE STORMTECH DESIGN MANUAL FOR BEARING CAPACITY GUIDANCE 4. PERIMETER STONE MUST BE EXTENDED HORIZONTALLY TO THE EXCAVATION WALL FOR BOTH VERTICAL AND SLOPED EXCAVATION WALLS. 5. REQUIREMENTS FOR HANDLING AND INSTALLATION • TO MAINTAIN THE WIDTH OF CHAMBERS DURING SHIPPING AND HANDLING, CHAMBERS SHALL HAVE INTEGRAL, INTERLOCKING STACKING LUGS. • TO ENSURE A SECURE JOINT DURING INSTALLATION AND BACKFILL, THE HEIGHT OF THE CHAMBER JOINT SHALL NOT BE LESS THAN 2". • TO ENSURE THE INTEGRITY OF THE ARCH SHAPE DURING INSTALLATION, a) THE ARCH STIFFNESS CONSTANT AS DEFINED IN SECTION 6.2.8 OF ASTM F2418 SHALL BE GREATER THAN OR EQUAL TO 750 LBS/FT/%. AND b) TO RESIST CHAMBER DEFORMATION DURING INSTALLATION AT ELEVATED TEMPERATURES (ABOVE 73' F / 23' C), CHAMBERS SHALL BE PRODUCED FROM REFLECTIVE GOLD OR YELLOW COLORS. o c o x w� O o o� LLI n Z Y ILLLZ �' wa- OZ) _ may( U O U) 2 3 0 LLI m m m 0 N z o U s w o a f 71311 8I 20M ZYV RWD y! SHEET OF 5 STORMTECH HIGHLY RECOMMENDS FLEXSTORM INSERTS IN ANY UPSTREAM STRUCTURES WITH OPEN GRATES I SUMP DEPTH TBD BY SITE DESIGN ENGINEER CATCH BASIN (24" [600 mm] MIN RECOMMENDED) OR MANHOLE INSPECTION & MAINTENANCE STEP 1) INSPECT ISOLATOR ROW PLUS FOR SEDIMENT INSTALL FLAMP ON 24" (600 mm) ACCESS PIPE PART#'SC80024RAMP SC-800 CHAMBER 24" (600 mm) HDPE ACCESS PIPE REQUIRED USE EZ END CAP PART #: SC800ECEZ SC-800 ISOLATOR ROW PLUS DETAIL NTS A. INSPECTION PORTS (IF PRESENT) A 1 REMOVE/OPEN LID ON NYLOPLAST INLINE DRAIN A.2. REMOVE AND CLEAN FLEXSTORM FILTER IF INSTALLED A.3. USING A FLASHLIGHT AND STADIA ROD, MEASURE DEPTH OF SEDIMENT AND RECORD ON MAINTENANCE LOG A 4 LOWER A CAMERA INTO ISOLATOR ROW PLUS FOR VISUAL INSPECTION OF SEDIMENT LEVELS (OPTIONAL) A.5. IF SEDIMENT IS AT, OR ABOVE, 3" (80 mm) PROCEED TO STEP 2. IF NOT, PROCEED TO STEP 3. B ALL ISOLATOR PLUS ROWS B. 1. REMOVE COVER FROM STRUCTURE AT UPSTREAM END OF ISOLATOR ROW PLUS B 2 USING A FLASHLIGHT, INSPECT DOWN THE ISOLATOR ROW PLUS THROUGH OUTLET PIPE 1) MIRRORS ON POLES OR CAMERAS MAYBE USED TO AVOID A CONFINED SPACE ENTRY ii) FOLLOW OSHA REGULATIONS FOR CONFINED SPACE ENTRY IF ENTERING MANHOLE B.3. IF SEDIMENT IS AT, OR ABOVE, 3" (80 mm) PROCEED TO STEP 2. IF NOT, PROCEED TO STEP 3. STEP 2) CLEAN OUT ISOLATOR ROW PLUS USING THE JETVAC PROCESS A. A FIXED CULVERT CLEANING NOZZLE WITH REAR FACING SPREAD OF 45" (1.1 m) OR MORE IS PREFERRED B. APPLY MULTIPLE PASSES OF JETVAC UNTIL BACKFLUSH WATER IS CLEAN C. VACUUM STRUCTURE SUMP AS REQUIRED STEP 3) REPLACE ALL COVERS, GRATES, FILTERS, AND LIDS; RECORD OBSERVATIONS AND ACTIONS STEP 4) INSPECT AND CLEAN BASINS AND MANHOLES UPSTREAM OF THE STORMTECH SYSTEM. NOTES 1. INSPECT EVERY 6 MONTHS DURING THE FIRST YEAR OF OPERATION. ADJUST THE INSPECTION INTERVAL BASED ON PREVIOUS OBSERVATIONS OF SEDIMENT ACCUMULATION AND HIGH WATER ELEVATIONS 2. CONDUCT JETTING AND VACTORING ANNUALLY OR WHEN INSPECTION SHOWS THAT MAINTENANCE IS NECESSARY. 12" (300 mm) MI 1 8" (200 mm) MIN THICKNESS OF P OVERLAYAND CONCRETE CO } ASPHALT OVERLAY FOR TRAFFIC APPLICATIONS CONCRETE COLLAR STORMTECH CHAMBER OPTIONAL INSPECTION PORT SC-800 END CAP ONE LAYER OF ADSPLUS625 WOVEN GEOTEXTILE BETWEEN FOUNDATION STONE AND CHAMBERS 5' (1 5 m) MIN WIDE CONTINUOUS FABRIC WITHOUT SEAMS NYLOPLAST 8" (200 mm) LOCKING SOLID COVER AND FRAME CONCRETE COLLAR / ASPHALT OVERLAY NOT REQUIRED FOR GREENSPACE OR NON -TRAFFIC APPLICATIONS 8" (200 mm) NYLOPLAST UNIVERSAL INLINE DRAIN BODY (PART# 270BAG41PKIT) OR TRAFFIC RATED BOX W/SOLID LOCKING COVER 4" (100 mm) SDR 35 PIPE 4" (100 mm) INSERTA TEE TO BE CENTERED ON CORRUGATION CREST NOTE: INSPECTION PORTS MAY BE CONNECTED THROUGH ANY CHAMBER CORRUGATION CREST. 4" PVC INSPECTION PORT DETAIL (SC SERIES CI -WA BIk) NTS Z _ 0 0 C0000 3 W� w' z LL LLZ Z 0 7= o 01 00 0� U) 2 3 � Lu Y m m J O = m52 r F U s u w Q w o a nwmuiAK 2.2.. ZYV -D s U E N L 0 m N U SHEET 4OF5 UNDERDRAIN DETAIL NITS STORMTECH I CHAMBERS ST A ECH END C END CAP OUTLET MANIFOLD STORMTECH CHAMBER FOUNDATION STONE ice, I I_�i BENEATH CHAMBERS T ADS GEOSYNTHETICS 601T NON -WOVEN GEOTEXTILE STORMTECH END CAP I FOUNDATION BENEATH CHAMBERS ADS GEOSYNTHETIC NON -WOVEN GEOTEXTILE — 4" (100 mm) TYP FOR SC'310 & SC-160LP SYSTEMS J'�'" c'"V""ccn 6" (150 mm) TYP FOR SC-800, DC-780, MC-3500, MC-4500 & MC-7200 SYSTEMS SECTION B-B DUAL WALL PERFORATED HDPE UNDERDRAIN SC-800 TECHNICAL SPECIFICATION NITS OVERLAP NEXT CHAMBER HERE (OVER SMALL CORRUGATION) a BUILD ROW IN THIS DIRECTION 85 4" (2169 mm) INSTALLED LENGTH I ^� 71 330" (838 mm) �^ I^ I �il �I�II I iI�1 W I i ll� I, 1 ` III �u IiJ I� L I (1295 mm) 90 6" (2301 mm) ACTUAL LENGTH NOMINAL GyQJy)gFR SgFCIJFI('AjJnNS 51.0" X 33.0" X 85.4" SIZE X H X�NSTALLED LENGTH) X 838 X 2169 (w CHAMBER STORAGE 50 6 CUBIC FEET (1295 mm mm mm) (1.43 m') MINIMUM INSTALLED STORAGE' 78 4 CUBIC FEET (2.22 m') WEIGHT 81.8 lbs. (37.1 kg) NOMINAL E(W X H X IN9TA�LEL"IF11epj1GN5 S46.5" X 32 6" X 10 5" (1181 mm X 828 mm X 267 mm) END CAP STORAGE L f� T) 3.4 CUBIC FEET (0.09 m") MINIMUM INSTALLED STORAGE" 14.7 CUBIC FEET (0.42 m') WEIGHT 15.7 lbs. IT kg) ASSUMES 6" (150 mm) STONE ABOVE, BELOW, AND BETWEEN CHAMBERS, 3" (75 mm) BETWEEN CHAMBERS "ASSUMES 6" (150 mm) STONE ABOVE AND BELOW END CAPS, 3" (150 mm) BETWEEN ROWS, 12" (300 mm) BEYOND END CAPS PRECOREDHOLES AT BOTTOM OF E PRE -CORED HOLES AT TOP OF END I PART # S�BOOEPE06T2 S 800EPEO6BP SC800EPEOBTPC SC800EPE08BPC SC800EPE10TPC SC800EPE10BPC STB C800EPE12TPC �QEPE12BP� EPEI5TP00EPE15BP�OOEPE18TP SC800EPE 1 8BPC SC800EPE24BPC SC800EPE ND CAP FOR PART NUMBERS ENDING WITH "BPC" ;AP FOR PART NUMBERS ENDING WITH "TPC" STUB B C 6" (150 mm) 21.4" (544 mm) --- --- 0.9" (23 mm) 8" (200 mm) 19.2" (488 mm) --- --- 1.0" (25 mm) 10" (250 mm) 17.0" (432 mm) --- --- 1.2" (30 mm) 12" (300 mm) 14.4" (366 mm) --- 1.6" (41 mm) 15" (375 mm) 11.3" (287 mm) --- --- 1.7" (43 mm) 18" (450 mm) 8.0" (203 mm) --- --- 2.0" (51 mm) 24" (600 mm) --- 2 3" (58 mm) NONE SOLID END CAP NOTE: ALL DIMENSIONS ARE NOMINAL START END PER SHEET OF 5 Isolator"' Row Plus O&M Manual ///A)S StormTech The Isolator Row Plus Introduction An important component of any Stormwater Pollution Prevention Plan is inspection and maintenance. The StormTech Isolator Row Plus is a technique to inexpensively enhance Total Suspended Solids (TSS), Total Phosphorus (TP), Total Petroluem Hydrocarbons (TPH) and Total Nitrogen (TN) removal with easy access for inspection and maintenance. The Isolator Row Plus The Isolator Row Plus is a row of StormTech chambers, either SC-160, SC- 310, DC-780, SC-800, MC-3500, MC-4500 or MC-7200 models, are lined with filter fabric and connected to a closely located manhole for easy access. The fabric lined chambers provide for sediment settling and filtration as stormwater rises in the Isolator Row Plus and passes through the filter fabric. The open bottom chambers allow stormwater to flow vertically out of the chambers. Sediments are captured in the Isolator Row Plus protecting the adjacent stone and chambers storage areas from sediment accumulation. ADS Isolator Row and Plus fabric are placed between the stone and the Isolator Row Plus chambers. The woven geotextile provides a media for stormwater filtration, a durable surface for maintenance, prevents scour of the underlying stone and remains intact during high pressure jetting. The Isolator Row Plus is designed to capture the "first flush" runoff and offers the versatility to be sized on a volume basis or a flow -rate basis. An upstream manhole provides access to the Isolator Row Plus and includes a high/low concept such that stormwater flow rates or volumes that exceed the capacity of the Isolator Row Plus bypass through a manifold to the other chambers. This is achieved with an elevated bypass manifold or a high -flow weir. This creates a differential between the Isolator Row Plus row of chambers and the manifold to the rest of the system, thus allowing for settlement time in the Isolator Row Plus. After Stormwater flows through the Isolator Row Plus and into the rest of the chamber system it is either exfiltrated into the soils below or passed at a controlled rate through an outlet manifold and outlet control structure. The Isolator Row Plus Flamlorm is a flared end ramp apparatus attached to the inlet pipe on the inside of the chamber end cap. The FLAMP provides a smooth transition from pipe invert to fabric bottom. It is configured to improve chamber function performance by enhancing outflow of solid debris that would otherwise collect at the chamber's end, or more difficult to remove and require confined space entry into the chamber area. It also serves to improve the fluid and solid flow into the access pipe during maintenance and cleaning and to guide cleaning and inspection equipment back into the inlet pipe when complete. The Isolator Row Plus may be part of a treatment train system. The treatment train design and pretreatment device selection by the design engineer is often driven by regulatory requirements. Whether pretreatment is used or not, StormTech recommend using the Isolator Row Plus to minimize maintenance requirements and maintenance costs. Note. See the StormTech Design Manual for detailed information on designing inlets for a StormTech system, including the Isolator Row Plus. Looking down the Isolator Row Plus from the manhole opening, ADS Plus Fabric is shown between the chamber and stone base. StormTech Isolator Row Plus with Overflow Structure (not to scale) 1—, °W,NR°°°Rs,°NE W,E1°a�`,. W. T °OUT M I — OE CONTROL WOVEN FABRIC FOR SCOUR PFKI CTON L Isolator Row Plus Inspection/Maintenance Inspection The frequency of inspection and maintenance varies by location. A routine inspection schedule needs to be established for each individual location based upon site specific variables. The type of land use (i.e. industrial, commercial, residential), anticipated pollutant load, percent imperviousness, climate, etc. all play a critical role in determining the actual frequency of inspection and maintenance practices. At a minimum, StormTech recommends annual inspections. Initially, the Isolator Row Plus should be inspected every 6 months for the first year of operation. For subsequent years, the inspection should be adjusted based upon previous observation of sediment deposition. The Isolator Row Plus incorporates a combination of standard manhole(s) and strategically located inspection ports (as needed). The inspection ports allow for easy access to the system from the surface, eliminating the need to perform a confined space entry for inspection purposes. If upon visual inspection it is found that sediment has accumulated, a stadia rod should be inserted to determine the depth of sediment. When the average depth of sediment exceeds 3" (75 mm) throughout the length of the Isolator Row Plus, clean -out should be performed. Maintenance The Isolator Row Plus was designed to reduce the cost of periodic maintenance. By "isolating" sediments to just one row, costs are dramatically reduced by eliminating the need to clean out each row of the entire storage bed. If inspection indicates the potential need for maintenance, access is provided StormTech Isolator Row Plus (not to scale) afoRARECH NIPRLYRECCA/ElDB FLIDET01W INEDI SNANYLPS W" SIRUCFIIRES FYFRI9P@I BIOV E8 ELEMTE0 6YPAW MANIFOLD i WNP CPRN THO RY 6R6MIM MIGINFNR PP PW m q M REOOWETDI via a manhole(s) located on the end(s) of the row for cleanout. If entry into the manhole is required, please follow local and OSHA rules for a confined space entry. Maintenance is accomplished with the JetVac process. The JetVac process utilizes a high pressure water nozzle to propel itself down the Isolator Row Plus while scouring and suspending sediments. As the nozzle is retrieved, the captured pollutants are flushed back into the manhole for vacuuming. Most sewer and pipe maintenance companies have vacuum/JetVac combination vehicles. Selection of an appropriate JetVac nozzle will improve maintenance efficiency. Fixed nozzles designed for culverts or large diameter pipe cleaning are preferable. Rear facing jets with an effective spread of at least 45" are best. StormTech recommends a maximum nozzle pressure of 2000 psi be utilized during cleaning. JetVac reels can vary in length. For ease of maintenance, ADS recommends Isolator Row Plus lengths up to 200' (61 m). The JetVac process shall only be performed on StormTech Isolator Row Plus that have ADS Plus Fabric (as specified by StormTech) over their angular base stone. W WO I.W NNPE ACCEW PPE FEQU IRED LF BD CAP PART■BC IB ONE LAYER CF ADSPUAM V/OYM GBOTECIII2 GErA Bi FOUNDATION WOMARO CIIM IM 9(1.3m11lN WGECONnNUMM FAMMMHOUTWA B Isolator Row Plus Step By Step Maintenance Procedures Step 1 Inspect Isolator Row Plus for sediment. A) Inspection ports (if present) i. Remove lid from floor box frame ii. Remove cap from inspection riser iii. Using a flashlight and stadia rod,measure depth of sediment and record results on maintenance log. iv. If sediment is at or above 3 inch depth, proceed to Step 2. If not, proceed to Step 3. B) All Isolator Row Plus i. Remove cover from manhole at upstream end of Isolator Row Plus ii. Using a flashlight, inspect down Isolator Row Plus through outlet pipe 1. Mirrors on poles or cameras may be used to avoid a confined space entry 2. Follow OSHA regulations for confined space entry if entering manhole iii. If sediment is at or above the lower row of sidewall holes (approximately 3 inches), proceed to Step 2. If not, proceed to Step 3. Step 2 Clean out Isolator Row Plus using the JetVac process. A) A fixed floor cleaning nozzle with rear facing nozzle spread of 45 inches or more is preferable B) Apply multiple passes of JetVac until backflush water is clean C) Vacuum manhole sump as required Step 3 Replace all caps, lids and covers, record observations and actions. Step 4 Inspect & clean catch basins and manholes upstream of the StormTech system. Sample Maintenance Log 3115111 6.3 fE Koble New 4AsEaLLoRoiA. 1=LXeA DAM potmAE Ls C1 frame aE grade Fj 9/24/11 6.2 0.1 f E Some grLE f eLE sM 6/20/13 C.? 0.5 f E Mucky f eeL, Aebrls viLsLke NV Ltn malnkoie o,KA LK IsoLolor Row ?Lus, moLKEeKoKce Aue adspipe.com 7/7/13 6.3 f E SysEew jeUed, aoxi DAM 800-821-6710 vacuumed ADS"Terms and Conditions of Sale" are available on the ADS website, www.adspipe.com The ADS logo, StormTech®, the Isolator® Row Plus and the Green Stripe are registered trademarks of Advanced Drainage Systems, Inc. 11AW 912025 Advanced Drainage Systems, Inc. #11081 S/25 CS StormTech n» I I I I \ I I 1 O i i NOTE: NO SAVED OR PROPOSED TREES ARE WITHIN THE SWFMA BOUNDARY I ICI I I n I I� 4 I ,I I yp_777. I awcae% I i` _ 72 i 3 \ I I �- I I I � I'I GA u pInTlT I I THE NUNNALLY STUDIO - DUTCH BROS COFFEE - BLUE MOUND R RATIONAL METHOD RUNOFF CALCULATIONS d AREA AREA (aa) Tc c 11 41 CA IS 05 1100 0100 ---- - - -- - - -- - -- -- -- NAME (min) I (in41r) (cfs) (inlhr) (CIS) (inmr) (cfs) 1 2 IRunaBData 9 4 5 6 7 fi T e B A A I AA A-2 0.41 014 10.00 1000 0.90 090 0.37 4.06 1.50 013 406 051 5.74 574 2.12 D.72 1.21 924 3.41 119 NE anGN \ A-3 B-1 B. 028 094 D.01 1000 1000 10.00 090 090 090 023 405 095 004 408 O15 001 408 0.04 574 574 5.74 1m D21 0D5 824 024 924 318 033 008 \� GNAPHIC—E IN FEET rnln-Ilnrelrnv�va nu��umrc aacr°vua ro s�Esin.�rticr � rraxo" or Al iavn`n'"sv�°c1°u"n° n s C"°`aaia avy'"c ° �llil; The RW All E ° nos 1 Nunnally Studio «wNllmemial PanmlN U. I>RA— °EF,G�,° 1XA11 � = ce3foP ,nA°ron Aaw., A µ ,s rsua-�N,na° � 'A e�w.A.sfi�EfiR,NaEaA��.Ep�� ��,.n� 3�— N s"a °oa�lsNE° EIEPAnpNA �111Y r s o`� .sEr`H' E°:°P �r�`"a Q ~ W" RAGr llj era "a.tla�E Al ° Ex o �P aim rower"n rc Ev = 0) 0 Lf DRAINAGE LEGEND O X R. NVI.[ppaAl—Onuwxr G — — — — — — — — — — — uinlxc nosm °iwn o U K L--] �Inlxe cuxa lx�n U y a5 Q rn O owAaxow o m 5 y 0 oENcx—T 'o e No o i.9Ao ac. owaENA�cAacA d � � E � � 'RROPOSEO DRAINAGE FROM SIfE5 70 UL7/MA7E �_ ... ...._. R DEVELOPMENT TABLE FROM SY/EET --- �.. ......... 7/25 9D2 OAD I I I I I I I I COMMENTS .ma ar I Drains b Cvb hkt Noimxommr. herya mraw Rcnf 8 covryartl open space area tlrain _ D,m b Cvb I,W PROPOSED D,.m ofsile DRAINAGE MAP Draim.%U, C6. w ��ms a�.��n�aesrem.��n,�a���.�a�d„���s�aa �o�w�m���mne�a�a,����wo.ana����.,�re a"��maam �e e�.�d��a»�����sn,��meb w�,�.e��r.�.��s �,..m�e.��.�m�m ��e�s,����, o�w�ons.abo��,res�m��e��r »�•�md�.l��„�awa�do,����,.aw�r�e,��s�re ��nr�� NORTH BLUE MOUND ROAD (F. M. 156 ) 020 111 IIT oA IF 111) a y #= ..____- -.... �...,..-___�_ mi v ------------------ z z �00 -- 2Dm- z < m =v m p Vcf 7C G � n 70 z0 D WO O m C 0 z� v;0 D M m � Vf D m "gym>A; o "e A -up A� m^� °�a"°€m a §_�A� "IIH pa. 7 mm. � F I ���e ^R� "q"^,�m$�A °z z� 2sA' � m �' sx e; 1 zAAA= RN" � g MOP fib# mg'$o� o go 9 e a 9 = a r $U RI ga� $��� m„ s GAF „_5 re g pyy m"`a ss mmm g n �P -�w a - ----- �Project No: TX0509 Dutch Bros Coffee - New Freestanding Store ,� d a N w ro !83 \ 6724 Blue Mound Road (FM 156) - DUNAWAY m= ~ Z z oia3 1 �� Fort Worth, TX w��"s ? j II�II III n`1 sso ernernverue. wne em.rarw«m, rex«�sim eeN — Cn o N: s Y 4�'*/s for Dutch Bros Coffee Tee ..i isi „ W S W 7 O `vt 110 SW 4lh St. a Q Sv o Zz° s m m — — — — — Grants Pass, OR 97526 8 N Exhibit "C" CITY OF FORT WORTH STORMWATER FACILITY OPERATION AND MAINTENANCE PLAN FOR UNDERGROUND FACILITIES 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 facilities storage volume is reduced by more than 10%. Silt shall be removed and the facility returned to original working condition of the lines and grades shown on the approved engineering plans. In addition, corrective measures are required any time a facility does not drain completely within 72 hours of cessation of inflow. NO STANDING WATER IS ALLOWED in the underground facility 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 facility. Disposal shall be in accordance with federal, state and local regulations. 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, silt, litter and debris removal dates. • 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 UNDERGROUND FACILITY MAINTENANCE AGREEMENT FORT WO RT H Fort Worth °CS Stormwater Management " EXHIBIT D" STORMWATER UNDERGROUND DETENTION FACILITY MAINTENANCE CHECKLIST FREQUENT INSPECTION Inspection Item: Date: Repairs Required: Repairs Made: Notes: Remove: Trash and Debris Remove: Grass Clippings, Leaves, Etc. MINOR INSPECTION: Inspection Item: Date: Repairs Required: Repairs Made: Notes: Condition of Underground Facility Amount of Silt in Facility Amount of Ponded Water in Facility MAJOR INSPECTION: Inspection Item: Date: Repairs Required: Repairs Made: Notes: Type / Condition of Outfall Structure Size and Condition of Outfall Pipe Evidence of Roots Infiltrating the Facility Evidence of subsidence around facility