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Contract 60511
Date Received: 11/20/23 Time Received: 2:30 PM Permit No.: SWFMA-23-0067 City Secretary No.: 60511 STORMWATER FACILITY MAINTENANCE AGREEMENT THIS AGREEMENT, made and entered into this loth day of November 20 23 , by and between Scannell Properties #606, LLC, an Indiana limited liability company, 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 James Smith Survey, Abstract No. 1149, Denton County, Texas according to the deed recorded in Instrument No. 2022-18245, Deed Records, Denton 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 Speedway 3 Industrial Park, Building 1, 2, & 3, 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 Rev. 03/01/2022 BN OFFICIAL RECORD CITY SECRETARY 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 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 of inspection is to follow-up on reported deficiencies and/or to respond to STORMWATER FACILITY MAINTENANCE AGREEMENT Rev. 03/01/2022 BN 2 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 Denton 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 Rev. 03/01/2022 BN 3 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 Denton 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 Rev. 03/01/2022 BN 4 Executed this loth day of November CITY OF FORT WORTH TJan2 Dana Burghdoff (Nov 0, 20234463S CST) Dana Burghdoff Assistant City Manager City of Fort Worth Date: Nov 17, 2023 Approved as to Form and Legality: Thomas Royce Hansen, Assistant City Attorney II City Attorney's Office Date: Nov 15, 2023 ATTEST: Jannette S. Goodall City Secretary Date: Nov 20, 2023 STORMWATER FACILITY MAINTENANCE AGREEMENT Rev. 03/01/2022 BN 20 23 LANDOWNER Scannell Properties #606, LLC an Indiana limited liability company By: Marc D. Pfleging Its: Manager Date: U 131 i_o 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 requirements. SON Rebecca Diane Owen (Nov 15, 2023 10:51 CST) Rebecca Owen Planning Manager Date: Nov 15, 2023 OFFICIAL RECORD CITY SECRETARY FT. WORTH, TX STATE OF TEXAS COUNTY OF TARRANT This instrument was acknowledged before me on Anew?, /7 Jw oicor3 by Dana Burghdoff, Assistant City Manager of the City of Fort Worth, on behalf of the City of Fort Worth. �"""" BROOKE BONNELL `,io4'1V �4 %ef_Notary Public, State of Texas c Comm. Expires 10-11-2026 %,,,,°,,,,., Notary ID 134009625 i LANDOWNER STATE OF _L tap 4 COUNTY OF /r /or-t-; o,t Notary Public, t. e o exas BEFORE ME, the undersigned authority, a Notary Public in and for the State of `s ram; QT. , on this day personally appeared (name), /1714-tt a.. r (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 SCornln..11ieaea. -teS*1 ttatAt1 t. t41 (entity), a tw`,\ex '14.`Di Cnani�mt (entity type) and in the capacity therein stated. 11 GIVEN UNDER MY HAND AND SEAL OF OFFICE this (.3 day of i6)0em ,20aS Ido —0.\Ntary Public State ofnanaso z Marion CountySF,:ComiiNe�mssonumbr NP0T38881 s i• My Commission Expires h�oi,�r*`February 06,2030 STORMWATER FACILITY MAINTENANCE AGREEMENT Rev. 03/01/2022 BN tary Public, Stat 6 OFFICIAL RECORD CITY SECRETARY FT. WORTH, TX EXHIBIT "A" INSERT LEGAL DESCRIPTION STORMWATER FACILITY MAINTENANCE AGREEMENT Rev. 03/01/2022 BN 7 "EXHIBIT A" PRIVATE DRAINAGE EASEMENT STATE OF TEXAS: COUNTY OF DENTON: BEING a tract of land situated in the James Smith Survey, Abstract No. 1 149, City of Fort Worth, Denton County, Texas, being a portion of Texas Motor Speedway, an addition to the City of Fort Worth, Denton County, Texas as recorded in 2021-192, Official Records, Denton County, Texas (ORDCT), being a portion of Tract 1 as described in deed to Scannell Properties #606, LLC, recorded in 2022-18245, ORDCT, and being more particularly described as follows: COMMENCING at a 1 /2" rebar capped PACHECO KOCH found in the northerly line of Victory Circle West (120' Right -Of -Way Easement, 2022-18242, ORDCT), being the northeast corner of said Scannell Tract 1, and an angle point in the North line of said Texas Motor Speedway addition and the South line of the remainder of Tract I as described in deed to Petrus Investment, L.P., recorded in Volume 4246, Page 546, Deed Records, Denton County, Texas, from which a 5/8" rebar capped ANA found bears North 33 degrees 56 seconds East, 1.10 feet; THENCE South 89 degrees 17 minutes 08 seconds West, along the south line of said Petrus Tract 1 remainder tract and the north line of said Scannell Tract 1, a distance of 920.82 feet to a 7/8" rebar found at the southwest corner of said Petrus Tract I remainder tract and the southeast comer of a tract of land as described in a deed to Northlake 156 & 144 LP, recorded in 2021-68670, ORDCT; THENCE South 89 degrees 14 minutes 49 seconds West, along the south line of said Northlake 156 & 144 LP tract and the north line of said Scannell Tract 1, a distance of 30.00 feet to the POINT OF BEGINNING of the herein described tract; THENCE departing the south line of said Northlake 156 & 144 LP tract, across said Scannell Tract 1, as follows: South 00 degrees 07 minutes 46 seconds East, a distance of 13.99 feet; South 31 degrees 06 minutes 40 seconds East, a distance of 364.42 feet; South 62 degrees 30 minutes 38 seconds West, a distance of 138.46 feet; South 75 degrees 53 minutes 32 seconds West, a distance of 45.72 feet; South 89 degrees 14 minutes 49 seconds West, a distance of 101.07 feet; North 21 degrees 46 minutes 10 seconds West, a distance of 36.74 feet; North 00 degrees 45 minutes 11 seconds West, a distance of 367.00 feet to a point in the south line of said Northlake 156 & 144 LP tract and the north line of said Scannell Tract 1; THENCE North 89 degrees 14 minutes 49 seconds East, along the south line of said Northlake 156 & 144 LP tract and the north line of said Scannell Tract 1, a distance of 98.36 feet to the POINT OF BEGINNING and containing 76,167 square feet or 1.749 acres of land. NOTE: Bearings are referenced to the final plat of Lots 1 & 2, Block A & Lot 2, Block 1, Speedway Distribution Center as recorded in 2009-31, Official Records, Denton County, Texas-NAD 83 (1993) datum. GM civil Engineering & Surveying 2559 SW Giapevine Pkwy, Grapevine Texas 76051 817-329-4373 TxEng Firm .. F-2944 1 TxSury Firm :' 10021700 Scale: NONE Date: 8/18/2023 Job No.: 10923 Drafted: T.A.D. Checked: J.S.B. Sheet 11 of 2 E:\10923 - TMS\COGO\FPLAT\ESMTS BY G&M\DRAINAGE\10923-DE1.dwg r GARS' I SU 48 W ABSTRACT ` RA r No. NORTHLAKE 156 & 114 LP 2021-68670, O. R. D. C. r A-448 L6 A-1149 0 O r •o N 00°45'11" W co kr) L1 "EXHIBIT A" S S�RVLY G. CllkR1IN c r N°• 2 1 5 AgS (REMAINDER) TRACT I PETRUS INVESTMENT, L.P. VOL. 4246, PG. 546, D.R. D. C. T 7/8" R.F. PRIVATE DRAINAGE EASEMENT 76,167 SQ. FT. 1.749 AC. S 89°17'08" W 920.82' APPROXIMATE LOCATION COWTOWN PIPELINE PARTNERS, L.P. QUICKSILVER RESOURCES, INC. 30' PIPELINE R.O.W. & EASEMENT 2014-27875, O.R.D.C.T. 2014-27876, O.R.D.C.T. 1/2" R.C.F. "PACHECO KOCH" (5/8" R.C.F. "ANA" AT N 33°56' E, 1.10') A-215A A-1149 V TRACT 1 SCANNELL PROPERTIES #606, LLC 2022-18245, O.R.D.C.T. u TEXAS MOTOR SPEEDWAY \ 2021-192, O.R.D.C.T. ND- .17 V v' \ \ 03�3 b \ � r� Sb�'136A \ \ L4 43 \ \ SL1R� Y q 01 \ \ J. SNq1 rail, N° 114 G \ \ STR< 4 0°50011. /GG��a2�R. , �� 1�2Q22 `g2 5t V 0 071P6el*'4 ,00i 1207 -152p2 0 100 SCALE IN FEET LINE TABLE LINE # BEARING DISTANCE Ll S89°14'49"W 30.00' L2 SOO°07'46"E 13.99' L3 S75°53'32"W 45.72' L4 S89°14'49"W 101.07' L5 N21 °46' 10"W 36.74' L6 N89°14'49"E 98.36' 1'444 GM GMciviL Engineering & Surveying 2559 SW Giapcvinc Pkwy, Grapcvinc Taxos 76051 817-329-4373 TxEr•.g Firm , F-2944 I TxSury Firm 10021700 Scale: 1" = 100' Date: 8/18/2023 Job No.: 10923 Drafted: T.A.D. Checked: J.S.B. Sheet 2 of 2 E:\10923 - TMS\COGO\FPLAT\ESMTS BY G&M\DRAINAGE\10923-DE1.dwg EXHIBIT "B" DESIGN PLAN AND SPECIFICATIONS STORMWATER FACILITY MAINTENANCE AGREEMENT Rev. 03/01/2022 BN 8 1181HX3 c) 0 N 0 101100 V III.- II ,-I1 II n9 - ,9L41,99 ,P,SCI -0 11119 - 9=V L 11/5071I "-YAWN A 1,44171d5 0 n Ot1;01° " lig : 6.! V, • .01 650 644 s 3 / 65 66, 656 655 V 0 E . ‘61 ass ass A 3 ; 0 0 0 oveliA SPEEDWAY 3 INDUSTRIAL PARK GM Civil BUILDING 3 . „ FORT WORTH, TEXAS SCANNELL PROPERTIES 1 ,.9« 119IHX3 621 610,0, i 9 n 1.52 1 1 EROSION CONTROL PLAN ''';,; r = PARK virvim '© 0 m "I--- _:: . j l' '"/ ,._ L SPEEDWAY 3 INDUSTRIAL Grnavil BUILDING 3 d� SCANNELL ■ Eµg'Zteiin963u"7.'"9 E O E E■ T I E FORT WORTH, TEXAS .�.,, 11a1 1I8IHX3 i F. a 4 T ulga 8 8 ,. zl s 6 f 1 �pa6iboy a n 9 n y'o . p O p' .`a F 3 '�' 1j«� SPEEDWAY DISTRIBUTION CENTER GM Cw� t FINAL DRAINAGE STUDY 4. SCANNELL CITY OF FORT WORTH o DENTON COUNTY, TEXAS """"' s Table 1: Existin • Conditions HEC-HMS Area Node (Sq. Mi.) A 0.097 Draina Lag Time (min.) 19.0 • e Basin CN7. 79.4 Parameters Impervious 10.8 B 0.0064 11.8 80.0 38.2 B A 1 0.676 49.1 78.3 17.6 BA2 1.372 37.9 79.5 16.9 BA3 0.605 41.5 77.9 10.5 BA4 0.261 25.7 79.7 38.3 BA5 0.204 18.6 80.0 24.1 BA6 0.028 7.5 79.1 6.6 BA7 0.196 26.9 79.7 0.0 BA8 0.703 41.1 78.3 22.9 EXHIBIT "B" Table 2: Proposed Conditions Drainage Basin Parameters HEC-HMS Area Node (Sq Mi.) A-1 0.0010 Lag Time (min.) 1.6 CN 74.0 % Impervious 72.2 A-2 0.0128 10.4 77.2 87.2 A-3 0.0109 11.3 79.0 78.7 A-4 0.0012 3.5 80.0 80.5 A-5 0.0048 7.8 80.0 77.7 A-6 0.0195 7.6 80.0 86.2 A-7 0.0115 2.6 80.0 91.2 A-8 0.0022 3.1 80.0 63.4 A-9 0.0248 17.6 79.9 33.2 A-10 0.0039 1.0 80.0 69.3 A-11 0.0044 5.7 80.0 73.3 B 0.0062 11.1 80.0 41.4 BA1 0.676 49.1 78.3 17.6 BA2 1.372 37.9 79.5 16.9 BA3 0.605 41.5 77.9 10.5 BA4 0.261 25.7 79.7 38.3 BA5 0.204 18.6 80.0 24.1 BA6 0.028 7.5 79.1 6.6 BA7 0.196 26.9 79.7 0.0 BA8 0.703 41.1 78.3 22.9 Table 3: Existing and Proposed Conditions Discharges HEC-HMS Existing Node 1-YR Condition 5-YR (cfs) 100-YR Proposed 1-YR Condit 5-YR on (cfs) 100-YR Pond D-2 19.9 26.5 42.5 19.9 26.5 42.5 Junction-1 19.2 23.8 37.8 19.2 23.8 37.8 J-A (JA-11) 113.6 173.5 358.2 102.1 139.5 279.0 Junction BA6 124.3 192.1 405.1 115.4 159.7 339.3 Junction BA6b 424.1 660.0 1438.4 419.0 643.5 1367.9 Junction BA7 500.0 809.8 1842.9 492.6 775.0 1765.7 Junction BA7b 1781.2 2880.4 6458.7 1779.1 2880.1 6429.9 B 8.4 12.5 25.3 8.4 12.5 25.3 Junction BA8 1849.1 3075.7 7291.8 1848.4 3071.6 7255.0 EXHIBIT "B" Pond Report Hydraflow Hydrographs Extension for AutoCAD8 Civil 3DO 2018 by Autodesk, Inc. v2018.3 Pond No. 6 - Pond A-10 Pond Data Pond storage is based on user -defined values. Stage / Storage Table Stage (ft) Elevation (ft) Contour area (sqft) Incr. Storage (cuft) Total storage (cuft) 0.00 657.25 n/a 0 0 0.75 658.00 n/a 30,308 30,308 1.75 659.00 n/a 43,348 73,656 2.75 660.00 n/a 46,800 120,456 3.75 661.00 n/a 50,353 170,809 4.75 662.00 n/a 53,993 224,802 5.25 662.50 n/a 28,404 253,206 Tuesday, 12 / 6 / 2022 Culvert / Orifice Structures Weir Structures [A] [B] [C] [PrfRsr] [A] [B] [C] [D] Rise (in) = 30.00 Inactive 0.00 0.00 Crest Len (ft) = 60.00 0.00 0.00 0.00 Span (in) = 30.00 0.00 0.00 0.00 Crest El. (ft) = 660.90 0.00 0.00 0.00 No. Barrels = 1 1 0 0 Weir Coeff. = 3.33 3.33 3.33 3.33 Invert El. (ft) = 657.25 0.00 0.00 0.00 Weir Type = Rect Rect -- Length (ft) = 42.00 0.00 0.00 0.00 Multi -Stage = No No No No Slope (%) = 0.55 0.00 0.00 n/a N-Value = .013 .013 .013 n/a Orifice Coeff. = 0.50 0.60 0.60 0.60 Exfil.(in/hr) = 0.000 (by Wet area) Multi -Stage = n/a No No No TW Elev. (ft) = 0.00 Stage (ft) 6.00 5.00 4.00 3.00 2.00 1.00 0.00 Note: Culvert/Orifice outflows are analyzed under inlet (ic) and outlet (oc) control Weir risers checked for orifice conditions (ic) and submergence (s). Stage / Discharge 00 40.0 Total Q 80.0 120.0 160.0 200.0 240.0 280.0 320.0 360.0 400.0 440.0 Elev (ft) 663.25 662.25 661.25 660.25 659.25 658.25 657.25 480.0 Discharge (cfs) EXHIBIT "B" 350 300 250 4- al 200 ao - 150 o 100 50 0 • Pond A-10 Tailwater Rating Curve Flow vs. Depth • fr- • 0 0 2 0.4 0.6 0.8 1 1.2 1.4 Depth (ft) Elevation (ft) Discharge (cfs) 657.00 0 657.28 30 657.44 60 657.58 90 657.70 120 657.80 150 657.90 180 658.00 210 658.08 240 658.17 270 658.24 300 660.21 2000 *Taken from cross section 1 159 of HEC-RAS model Pond A-10 EXHIBIT "B" Project: TMS Simulation Run: 100-YR PROP DET Start of Run: 10Feb2022, 00:00 End of Run: 11Feb2022, 00:00 Compute Time: 06Dec2022, 11:52:18 Basin Model: Proposed With Porn Meteorologic Model: 100-YR Control Specifications:Control 1 Hydrologic Element Drainage Are (MI2) Weak Discha'pne (CFS) of Peak Volume (IN) BA1 0.6760000 1156.2 10Feb2022, 12:52 6.79 R-BA1 0.6760000 1149.5 10Feb2022, 13:04 6.76 BA2 1.3710000 2776.1 10Feb2022, 12:40 6.90 R-BA2 1.3710000 2767.7 10Feb2022, 12:46 6.89 BA3 0.6050000 1123.0 10Feb2022, 12:44 6.57 Junction BA3 2.6520000 4870.4 10Feb2022, 12:48 6.78 R-JBA3 2.6520000 4851.3 10Feb2022, 12:54 6.77 BA4 0.2610000 696.2 10Feb2022, 12:28 7.49 R-BA4 0.2610000 687.3 10Feb2022, 12:40 7.45 BA5 0.2040000 632.8 10Feb2022, 12:20 7.18 Junction BA5 0.4650000 1075.0 10Feb2022, 12:34 7.33 D-1 0.0242969 134.8 10Feb2022, 12:08 8.80 Pond D-1 0.0242969 19.0 10Feb2022, 12:44 8.80 D-2a 0.0054531 28.0 10Feb2022, 12:08 7.57 D-2b 0.0033906 17.2 10Feb2022, 12:08 7.45 Pond D-2A 0.0331406 22.9 10Feb2022, 13:14 8.44 RD-2A 0.0331406 22.9 10Feb2022, 13:16 8.44 D-3a 0.0040000 22.2 10Feb2022, 12:08 8.78 D-4 0.0035781 18.5 10Feb2022, 12:08 7.69 D-3b 0.0015937 8.2 10Feb2022, 12:08 7.59 D-3c 0.0011250 5.7 10Feb2022, 12:08 7.36 Pond D-2 0.0434374 42.2 10Feb2022, 12:20 8.25 RD-2 0.0434374 41.9 10Feb2022, 12:22 8.25 A-6 0.0195000 99.1 10Feb2022, 12:08 8.71 Pond A-6 0.0195000 42.6 10Feb2022, 12:22 8.71 JA-6 0.0629374 84.5 10Feb2022, 12:22 8.39 RA-6 0.0629374 84.0 10Feb2022, 12:26 8.38 Page 1 EXHIBIT "B" Hydrologic Element Drainage Ar€Peak (MI2) Discha (CFS) gene of Peak Volume (IN) A-7 0.0115000 77.4 10Feb2022, 12:04 8.84 Pond A-7 0.0115000 17.6 10Feb2022, 12:20 8.84 JA-7 0.0744374 101.4 10Feb2022, 12:24 8.46 RA-7 0.0744374 101.1 10Feb2022, 12:26 8.45 C-1 0.0234375 131.2 10Feb2022, 12:08 8.94 POND C-1 0.0234375 18.7 10Feb2022, 12:42 8.94 C-2 0.0043906 21.1 10Feb2022, 12:08 6.62 Junction-1 0.0278281 37.8 10Feb2022, 12:08 8.57 RC-2 0.0278281 36.9 10Feb2022, 12:10 8.57 A-11 0.0044000 24.0 10Feb2022, 12:08 8.40 A-8 0.0022000 13.8 10Feb2022, 12:04 8.16 A-1 0.0010000 6.7 10Feb2022, 12:02 8.18 RA-1 0.0010000 6.6 10Feb2022, 12:04 8.17 A-2 0.0128000 57.8 10Feb2022, 12:12 8.69 Pond A-2 0.0128000 22.8 10Feb2022, 12:30 8.69 JA-2 0.0138000 23.9 10Feb2022, 12:06 8.65 RA-2 0.0138000 23.8 10Feb2022, 12:20 8.65 A-3 0.0109000 46.8 10Feb2022, 12:12 8.50 Pond A-3 0.0109000 17.6 10Feb2022, 12:32 8.50 RA-3 0.0109000 17.6 10Feb2022, 12:34 8.49 A-4 0.0012000 7.5 10Feb2022, 12:04 8.58 JA-4 0.0259000 44.1 10Feb2022, 12:06 8.58 RA-4 0.0259000 43.1 10Feb2022, 12:10 8.57 A-5 0.0048000 23.9 10Feb2022, 12:10 8.50 JA-5 0.0307000 67.0 10Feb2022, 12:10 8.56 RA-5 0.0307000 66.5 10Feb2022, 12:10 8.56 A-9 0.0248000 80.4 10Feb2022, 12:20 7.40 A-10 0.0039000 28.0 10Feb2022, 12:02 8.31 JA-11 0.1682655 279.0 10Feb2022, 12:20 8.22 R-A 0.1682655 278.4 10Feb2022, 12:24 8.21 BA6 0.0280000 123.6 10Feb2022, 12:10 6.67 Page 2 EXHIBIT "B" Hydrologic Element Drainage ArePeak (MI2) Dischaffi (CFS) me of Peak Volume (IN) Junction BA6 0.1962655 339.3 10Feb2022, 12:18 7.99 Junction BA6b 0.6612655 1367.9 10Feb2022, 12:32 7.53 R-BA6 0.6612655 1358.8 10Feb2022, 12:42 7.50 BA7 0.1960000 474.2 10Feb2022, 12:30 6.54 Junction BA7 0.8572655 1765.7 10Feb2022, 12:38 7.28 Junction BA7b 3.5092655 6429.9 10Feb2022, 12:50 6.89 R-JBA7 3.5092655 6269.1 10Feb2022, 13:10 6.82 B 0.0062000 25.3 10Feb2022, 12:12 7.61 R-B 0.0062000 20.8 10Feb2022, 13:28 7.45 BA8 0.7030000 1357.3 10Feb2022, 12:44 6.94 Pond A-10 0.0594000 138.9 10Feb2022, 12:22 7.77 Junction BA8 4.2184655 7255.0 10Feb2022, 13:08 6.84 Page 3 EXHIBIT "B" Exhibit "C" CITY OF FORT WORTH STORMWATER FACILITY OPERATION AND MAINTENANCE PLAN The only responsibility the City of Fort Worth has in the operation and maintenance of this Facility is inspection. General Maintenance Procedures The structural and functional integrity of the Facility shall be maintained at all times by removing and preventing drainage interference, obstructions, blockages, or other adverse effects into, through, or out of the system. Periodic silt removal shall occur when standing water conditions occur or the pond's storage volume is reduced by more than 10%. Silt shall be removed and the pond/basin returned to original lines and grades shown on the approved engineering plans. In addition, corrective measures are required any time a basin does not drain completely within 72 hours of cessation of inflow. NO STANDING WATER IS ALLOWED in basins designed for dry detention purposes. Accumulated litter, sediment, and debris shall be removed every 6 months or as necessary to maintain proper operation of the basin. Disposal shall be in accordance with federal, state and local regulations. Detention facilities shall be mowed monthly between the months of April and October or anytime vegetation exceeds 12-inches in height. To prevent debris from entering and clogging the downstream storm sewer system a wire mesh screen or similar screening device shall be installed over the outlet until final acceptance. 4. PREVENTIVE MAINTENANCE/INSPECTION • Visual inspections of all components will be conducted every 6 months. • A log shall be kept of maintenance actions, and inspections. The log should document the condition of the detention system's primary components, mowing, and silt, litter and debris removal dates. Document aeration of the basin bottoms and replanting to prevent the sealing of the basin bottom. • Written maintenance and repair records shall be maintained by the party or parties signing the attached Agreement and shall be provided to the City upon request. STORMWATER FACILITY MAINTENANCE AGREEMENT Rev. 11/19/2020 JLE 10 ARMORMAX' Engineered Earth Armoring System SLOPE INSTALLATION AND MAINTENANCE GUIDELINES Thank you for purchasing ARMORMAX® for Erosion Control or Slope Stability by Propex Operating Company, LLC (Propex). This document provides installation and maintenance guidelines for ARMORMAX used as slope armoring to improve earthen slope resiliency and slope stability. ARMORMAX provides permanent erosion protection of an earthen slope, promotes vegetation, and improves slope stability, consists of two components: • PYRAMAT® - High Performance Turf Reinforcement Mat (HPTRM) • Engineered Earth Anchor (Anchor) Temporary securing pins (pins) are used during installation to hold ARMORMAX in place while installing anchors. Pins also promote vegetation establishment keeping ARMORMAX in intimate contact with the soil. ARMORMAX is an Engineered Earth Armoring Solution TM with a unique design for each specific project. While Propex has made every effort to ensure general validity, this information should not be used for a specific application without independent professional examination and verification of its suitability, applicability, and accuracy. The information provided herein is for general information only, and is intended to present installation guidance. Project specific contract documents take precedence when pin and anchor placements are different than what is represented in this document. Depending upon the critical nature of the structure to be armored, work restrictions may be in place such as limiting work based on growing seasons, weather patterns, etc. Work should be performed under the provisions set forth for the specific project. Propex Engineering Services is available for support during installation to consult for solving constructability issues encountered in specific applications. Please feel free to contact our Engineering Serivces team at GeoEngineerinl=@oronex>tilobal.com. BEFORE INSTALLATION BEGINS • Coordinate with a Propex Representative: A pre -construction meeting is suggested with the construction team and a representative from Propex. This meeting should be scheduled by the contractor with at least a two week notice. • Gather the Tools Needed: Tools that you will need to install ARMORMAX include a pair of industrial shears, tape measure, percussion hammer (sized appropriately for the anchors), ground rod driver compatible with the percussion hammer, drive steel compatible with the anchor, setting tool to set and load -lock the anchor, and wire/bolt cutters to cut the cable tendon of the anchor. If anchors will be load tested during construction, additional testing equipment may be necessary. Consult the "Anchor Load Test Manual" from Propex for further guidance. Available for purchase from Propex are drive steel, JackJaw® Setting Tools, wire cutters, and a gas powered anchor driver. • Determine how to Establish Vegetation: The method of vegetation establishment should be determined prior to the start of installation. • Different vegetation establishment methods require different orders of installation. Refer to VEGETATION ESTABLISHMENT for further guidance. INSTALLATION OF ARMORMAX ON SLOPES PREPARE THE SITE It is recommended during all stages of site preparation that disturbed soils remain unprotected for not more than a single day. Depending on project size this may require progressive site preparation during installation. 1. Grade and compact the area on the slope where ARMORMAX will be installed. The slope surface should be uniform and smooth, having all rocks, clods, vegetation or other objects removed so that during ARMORMAX LAYDOWN, ARMORMAX comes in direct, intimate contact with the slope surface. 2. Whether placing new fill or addressing a sloughed slope, appropriate placement and compaction is critical for the long term performance of the slope. In order to promote continuity of the slope and improve overall stability, any loose soil placed should be keyed into the existing slope and compacted in horizontal lifts per the engineer of record. To ensure compaction at the face of the slope, it is common practice to over -build the slope face, compact in lifts, and then regrade or trim the slope to the final grade. Propex Operating Company, LLC - 4019 Industry Drive, Chattanooga, TN 37416 - p 800 621 1273 - www.propexglobal.corn 3. Prepare the area to be armored with ARMORMAX by loosening the topsoil to promote better vegetation establishment. This may be accomplished with a rotary tiller on slopes 3:1 or flatter. For slopes greater than 3:1, prepare topsoil in a safe manner. ARMORMAX®, SEE NOTE 1 COMPACTED RACKFILL DETAIL 1: CREST OF SLOPE (COS) TRENCH 1. (300 mm) ANCHOR ON HORIZONTAL SPACING PER ANCHOR/PIN SCHEDULE, SEE DETAIL 6, WITH PINS ON 12" (300 mm) CENTERS Figure 1: Crest of Slope (COS) Trench 4. Excavate a Crest of Slope (COS) trench 12 in x 12 in (300 mm x 300 mm) minimum at a distance of 3 ft (900 mm) from the crest of the slope. (Figure 1). 5. Excavate a Toe of Slope (TOS) trench 12 in x 12 in (300 mm x 300 mm) minimum at a minimum distance of 5 ft (1.5 m) from the toe of the slope. (Figure 2) 6. If seeding, refer to VEGETATION ESTABLISHMENT for additional considerations during site preparation. Propex Operating Company, LLC - 4019 Industry Drive. Chattanooga, TN 37416 - p 800 621 1273 - www.propexglobal.corn ARMORMAX' En livered Eerth ArmornSYStem COMPACTED BACKFILL ARMORMAX®, SEE NOTE 1 (300mm) SEE DETAIL 3, TYPICAL ANCHOR ON HORIZONTAL SPACING PER ANCHOR/PIN SCHEDULE, SEE DETAIL 6, WITH PINS ON 12" (300 mm) CENTERS DETAIL 2: TOE OF SLOPE TTOSJ TRENCH Figure 2: Toe of Slope (TOS) Trench ARMORMAX LAYDOWN Page 3 of 17 1. Begin the ARMORMAX LAYDOWN process by starting with the downstream / downwind end of the site. To ensure proper anchoring of the overlapped areas the proceeding roll width must be laid out before the current roll width can be anchored with exception to the final roll width. For straight sections of a slope, ARMORMAX panel lengths should be long enough to construct COS and TOS trenches while also covering the surface of the slope being armored (Figure 12). Panel edges should rest approximately perpendicular to the slope center line. For best results, panels of ARMORMAX should be continuous and free from seams or roll end overlaps that are parallel to the centerline of the slope. Panel edge overlapping should follow a pattern of placing each proceeding panel's edge overtop the previous panel edge, shingling the panels in the direction of the water flow or prevailing wind. 2. Starting at the COS trench, lay ARMORMAX roll so that the roll ends points towards the crest of the slope (Figure 3), with a 3 inch (75 mm) overlap created at adjacent panel edge locations. Ensure that adjacent panel edges maintain a minimum 3 inch overlap during ARMORMAX LAYDOWN (Figure 8). Figure 3: Crest of Slope (COS) Trench Alignment 3. Secure ARMORMAX with pins and Secondary anchors in the COS trench. Pins should be made of steel with a 0.20 in (5 mm) minimum diameter, having a 1.5 in (38mm) diameter washer at the head, and a length between 12 and 24 in (300- 600 mm) with sufficient ground penetration to resist pullout (Figure 4). Longer pins may be required for looser soils. Heaver metal stakes may be required in rocky soils. Suggested placement of pins and Secondary anchors for the COS trench is Propex Operating Company, LLC - 4019 Industry Drive, Chattanooga, TN 37416 - p 800 621 1273 - www.propexglobal.com along the bottom of the trench with pins on 12 in (300 mm) centers in between Secondary anchors on 4 ft (1.2 m) centers. Secondary anchors should also be installed on panel edge overlaps in the COS trench. 12 24' L 1 5' (38 mm) DIAMETER STEEL WASHER 0,20' (5 mm) DIAMETER STEEL SEE NOTE 2 FOR PIN DESCRIPTION DETAIL 7: PIN Figure 4: Securing Pin 4. Backfill and compact the COS trench in the location of the first ARMORMAX panel only (Figure 5). Figure 5: Crest of Slope (COS) Trench Placement 5. Unroll the ARMORMAX roll on the slope surface in the area to be armored (Figure 6). Ensure that ARMORMAX has intimate contact with the ground and all irregular surfaces beneath ARMORMAX are removed. Figure 6: Placement of ARMORMAX across Slope 6. Secure ARMORMAX panels in place using pins, Primary anchors, and anchors across the slope surface according to the project's engineered design. Pin and anchor placement should reflect a staggered checkerboard pattern across the slope surface for best results (Figure 7 and Figure 8). • The leading edge of the first ARMORMAX panel should be secured on the Slope Armoring Edge (SAE) with pins on 12 in (300 mm) centers in between anchors on intervals based on the slope stability analysis. Propex Operating Company, LLC - 4019 Industry Drive, Chattanooga, TN 37416 - p 800 621 1273 - www.propexglobal.corn ARMORMAX' En • favored Earth Arrnorifl • System Page 5 of 17 • Roll edges shall be overlapped a minimum of 3 in (75 mm) with pins placed on 12 in (300 mm) centers in between anchors on intervals based on the slope stability analysis (Figure 8). • Roll ends shall be overlapped a minimum of 6 in (150 mm) with upstream / upwind panel on top. Secure roll end overlaps with two rows of pins staggered 6 in (150 mm) apart on 12 in (300 mm) centers and with one row of anchors on intervals based on the slope stability analysis (Figure 9) • For slope lengths greater than 45 ft (13.7 m), install simulated check slots. This method includes placing two rows of pins 12 in (300 mm) apart on 12 in (300 mm) centers and one row of anchors between the rows of pins on 4 ft (1.2 m) centers at 45 ft (13.7 m) maximum intervals or across the midpoint of the slope for slope lengths less than 60 ft (18.2 m) (Figure 10). • At the break in slope interface towards the TOS, it is suggested that anchors be installed on intervals based on the slope stability analysis (Figure 11). ARMORMAX®, SEE NOTE 1 170 VERTICAL PIN SPACING PER ANCHOR/PIN SCHEDULE PIN, SEE DETAIL 7 HORIZONTAL PIN SPACING PER ANCHOR/PIN SCHEDULE DETAIL 4: PIN PATTERN Figure 7: Example Pin Pattern VERTICAL PIN SPACING PER ANCHOR/PIN SCHEDULE ARMORMAX®, SEE NOTE 1 FLOW OF WATER OR DIRECTION OF PREVAILING WIND HORIZONTAL PIN SPACING PER ANCHOR/PIN SCHEDULE 3' OVERLAP MIN —1 , (75 mm) PIN SPACING, SEE DETAIL 4 OFFSET ANCHOR AS SHOWN TO CREATE A CHECKERBOARD PATTERN G 0 ANCHOR, SEE DETAIL • PIN, SEE DETAIL 7 DETAII, 5. ANCHOR/PIN PATTERN, PINS ON 12" (300 mm) CENTERS ON ROLL EDGE OVERLAPS BETWEEN ANCHORS r I r Figure 8: Example of Anchor Pattern - 0.5 Anchors/yd2 Propex Operating Company, LLC - 4019 Industry Drive, Chattanooga, TN 37416 - p 800 621 1273 - www.propexglobal.com ARMORMAX' En ineered Earth Armoring System Page 6 of 17 TOP OF SLOPE 1 UP STREAM - V ARMORMAX®, - SEE NOTE 1 FLOW OF WATER OR DIRECTION OF PREVAILING WIND 6" MIN (150 mm) ROLL EDGE AVAVOSVA AAAAAAAAAAAAAAAAAAAAAAAA 1' MAX (300 mm) 7A ♦ ♦AAAA AVAVAVAVAVAVAV►7♦ 7AAAAAAA7A7 V 7A7 VA7A7 HORIZONTAL PIN SPACING PER ANCHOR/PIN SCHEDULE OVERLAPPING ENO BOTTOM OF SLOPE I DOWN STREAM NOTE: ARMORMAX SHOULD BE SHINGLED IN THE DIRECTION OF THE DOWN SLOPE AND FLOW 0 ANCHOR, SEE DETAIL • PIN, SEE DETAIL 7 DETAIL R. OVERLAP AT ROLL END DETAIL Figure 9: Roll End Overlap ARMORMAX®, SEE NOTE •5' MAX OR NEAR MIDPOINT OF SLOPE NA MI HORIZONTAL PIN SPACING MAX r PER ANCHOR/FIN SCHEDULE • ► {300 mm) - • • 7ATAVATA 7dAAAAA A►AAAAAA A7A7ATATA 7AgT 1►7A7 0 ANCHOR, SEE DETAIL • PIN, SEE DETAIL 7 j - 6• MAX 1' MAX (150 mm) (300 mm) DETAIL 9: SIMULATED CHECK SLOT DETAIL Figure 10: Simulated Check Slot Propex Operating Company, LLC - 4019 Industry Drive, Chattanooga, TN 37416 - p 800 621 1273 - www.propexglobal.com ARMORMAX' Eagineared Earth *among System ANCHOR ON HORIZONTAL SPACING, PER ANCHOR/PIN SCHEDULE, SEE DETAIL 6 ARMORMAX®, SEE NOTE 1 DETAIL 3: BREAK IN SLOPE INTERFACE Figure 11: Break in Slope Interface Page 7 of 17 7. Secure ARMORMAX with pins and anchors in the TOS trench. Suggested placement of pins and anchors for the TOS trench is along the bottom of the trench with pins on 12 in (300 mm) centers in between anchors on 4 ft (1.2 m) centers (Figure 12). ARMORMAX® TOS TRENCH -ANCHOR — COS TRENCH Figure 12: Crest of Slope (COS) Trench and Toe of Slope (TOS) Trench Complete 8. Backfill and compact the TOS trench. (Figure 12) 9. Continue to work down the length of the slope by repeating steps 1 through 8 overlapping each adjacent ARMORMAX panel by 3 inches (75 mm) (Figure 8). The last ARMORMAX panel should terminate on the Slope Armoring Edge (SAE) with pins on 12 in (300 mm) centers in between anchors on intervals based on the slope stability analysis. At a minimum, ARMORMAX panels should be pinned entirely across the slope surface, pins and anchors should be installed in the trenches, and the trenches should be backfilled and compacted at the end of each day to minimize rework in the case of a major rain event. Specific project conditions may warrant further evaluation of installation order for ease. An example elevation view (Figure 13) of a slope armored with ARMORMAX can be seen below for overall reference. Consult Propex Engineering Services at (800) 621-1273with any questions that you may have. Propex Operating Company, LLC - 4019 Industry Drive, Chattanooga, TN 37416 - p 800 621 1273 - www.propexglobal.com ARMORMAX' Engineered funk Armor -in . System Page 8 of 17 SEE DETAIL 3, SEE DETAIL2, TYPICAL TYPICAL SEE DETAIL 6, TYPICAL SEE DETAIL 10, TYPICAL ARMORMAX®, SEE NOTE 1 SEE DETAIL 1, TYPICAL NOTE: PINS ARE NOT SHOWN FOR THE PURPOSE OF CLARITY ELEVATION 1: INSTALLATION OF ARMORMAX ON A SLOPE Figure 13: Completed Slope Isometric View INSTALL ANCHORS The ARMORMAX anchor typically consists of an anchor head, a flexible cable tendon, and a load bearing plate. For quality control purposes and warranty claims, anchors should be delivered to the jobsite fully assembled and ready for installation. Anchors are to be installed in locations specified for the project, and are typically installed in conjunction with ARMORMAX LAYDOWN. There are several options available from Propex for different types of anchors. For optimal performance with the greatest risk reduction, it is important to select the proper anchor and perform the installation in accordance with the pattern designed for required resiliency and long term durability of the slope. Understanding the mechanics behind installing the anchor component of ARMORMAX will result in a quality ARMORMAX installation. TYPE B1 & B2 ANCHOR The installation of either Type B1 or Type B2 Anchor (Figure 14) is described below. The tools that you will need are a percussion hammer, a ground rod driver and drive steel compatible with the anchor and percussion hammer, a JackJaw setting tool, and wire cutters. Propex Operating Company, LLC - 4019 Industry Drive, Chattanooga, TN 37416 - p 800 621 1273 - www.propexglobal.corn ARMORMAX° En •Jnecred Enrth Armoring System Page 9 of 17 LOAD BEARING PLATE EMBEDMENT DEPTH PER ANCHOR/PIN SCHEDULE ARMORMAX®, SEE NOTE 1 SEE NOTE 1.2 FOR ANCHOR DESCRIPTION SLOPE FACE (PREPARED SUBGRADE) ANCHOR TENDON ANCHOR HEAD (LOAD -LOCKED POSITION) Figure 14: Anchor Detail 1. Use one piece drive steel or assemble segmental drive steel to the appropriate length in order to drive the anchor to the specified embedment depth. 2. Insert the tapered end of the drive steel into the hollow cavity of the anchor head. Position the anchor head/ drive steel tip above the ground at the drive location (Figure 15 and Figure 16). Figure 15: Insert Drive Steel into Anchor Propex Operating Company, LLC - 4019 Industry Drive, Chattanooga, TN 37416 - p 800 621 1273 - www.propexglobal.com ARMORMAX' Engineered Earth Armorinr System Page 10 of 17 Figure 16: Position Anchor Head / Drive Steel Tip 3. Using a percussion hammer, guide the drive steel into the ground perpendicular to the slope surface at a smooth pace. Continue driving until the desired embedment depth is reached (Figure 17). Figure 17: Drive Steel to Drive the Anchor into the Ground 4. Remove the drive steel from the ground. (Figure 18) Depending on soil conditions, this may require the use of a setting tool or leverage device. Propex Operating Company, LLC - 4019 Industry Drive, Chattanooga, TN 37416 - p 800 621 1273 - www.propexglobal.com Engineered Earth Armartn Figure 18: Remove Drive Steel from Ground 5. Slide the load bearing plate down the anchor tendon towards the slope surface using your hands (Figure 19). Figure 19: Slide Plate 6. Once the plate is close to the slope surface, place the JackJaw Setting Tool on the anchor plate and place the top of the anchor tendon into the grips, keeping the anchor tendon perpendicular to the slope surface (Figure 20). With gentle force, slowly start to press down on the JackJaw lever - towards the slope surface - causing the anchor tendon to start to move out of the ground (displace). During this step, the anchor head will turn in the ground - a process known as "anchor setting". The change in embedment depth to set a Type B1 Anchor can be up to 6 inches and up to 8 inches for Type B2 depending on soil conditions. When the anchor is set, there will be a noticeable change in the amount of force needed to displace the anchor any further. This is a good indication that the anchor head is now perpendicular to the anchor tendon and the anchor is ready to be load -locked. Propex Operating Company, LLC - 4019 Industry Drive, Chattanooga, TN 37416 - p 800 621 1273 - www.propexglobal.com ARMORMAX' Er..laeered Earth Armar4rg System Page 12 of 17 Figure 20: Use JackJaw Setting Tool to Set Anchor 7. To load -lock an anchor, continue to apply tension to the anchor tendon using the JackJaw Setting Tool creating a slight depression on the slope surface. Visually, anchors across ARMORMAX will look similar to buttons across a mattress top when anchors have been properly load -locked. 8. Conduct anchor load tests when required for quality assurance during installation. Refer to the document entitled "Anchor Load Test Manual" by Propex for further details. 9. Once anchors have been load -locked, cut off the excess anchor tendon flush to the plate at the slope surface using wire cutters (Figure 21 and Figure 22). Figure 21: Trim Extra Cable Flush to Plate Propex Operating Company, LLC - 4019 Industry Drive, Chattanooga, TN 37416 - p 800 621 1273 - www.propexglobal.com ARMORMAX' EngineEred Earth Armoring System Figure 22: Complete Anchor Installation VEGETATION ESTABLISHMENT Page 13 of 17 Vegetation can be established with ARMORMAX by broadcast seeding, hydraulic seed application (hydroseeding), or sodding. Seed application rate, seed type, sod type, and irrigation rate should be selected based on local or site specific knowledge and time of year. For best results, consider having a site specific soil test performed to help determine what soil amendments, such as lime and fertilizer, need to be incorporated into the soil to promote healthy vegetation. Irrigate as necessary to establish and maintain vegetation until 75% of vegetation has established and has reached a height of 2 inches. Frequent, light irrigation will need to be applied to seeded areas if natural rain events have not occurred within two weeks of seeding. While watering seeded areas use a fine spray to prevent erosion of seeds or soil. Do not over irrigate. Proper irrigation guidance is provided under the Maintenance portion of this document. PROJECT SPECIFIC CONSIDERATIONS 1. For applications that require special transitions (i.e. connections to riprap, concrete, T-walls, etc.), refer to the project specific drawings or consult with Propex Engineering Services at (800) 621-1273. 2. A deeper terminal trench and/or hard armoring may be required when slopes have severe scour potential at the toe location. 3. For installing ARMORMAX panels around curved sections of a slope, trim panels at an angle so that no more than two layers of ARMORMAX overlap at any point in time. Additional pins and anchors may be needed to secure panel edges towards the toe of the slope depending upon the radius of the curved slope. Install pins or anchors as necessary to securely fasten ARMORMAX to the ground. 4. Allowable Vehicle Traffic: A. If using equipment on ARMORMAX, it should be of the rubber -tired type and should avoid sharp turns. Tracked equipment is not permitted to drive over the ARMORMAX without vegetation at any time. B. Avoid any traffic over ARMORMAX if loose or wet soil conditions exist. 5. Disturbed areas should be reseeded. If ruts or depressions develop for any reason, rework soil until smooth and reseed such areas. Propex Operating Company, LLC - 4019 Industry Drive, Chattanooga, TN 37416 - p 800 621 1273 - www.propexglobal.com ARMORMAX' EngineeredEorthAmtarfn• System Page 14 of 17 SHORT-TERM AND LONG-TERM MAINTENANCE OF ARMORMAX The purpose of this section is to provide some general guidelines for performing short-term and long-term maintenance of ARMORMAX with respect to maintaining vegetation reinforced with ARMORMAX, and patching of ARMORMAX (in the event it needs to be removed or replaced). These procedures are to be considered minimum guidelines for proper maintenance, and further maintenance techniques may be appropriate considering local practices and procedures. ARMORMAX PROTECTED SLOPES For ARMORMAX to be most effective, it is important to ensure that it is properly maintained both during construction and after construction. Identifying trouble areas is easy with ARMORMAX, and it can make identifying potential threats much simpler and manageable. Look for areas with sparse, dying, or no vegetation as these are obvious signs that ARMORMAX is losing intimate contact with the slope surface. If loss of ground surface occurs, ARMORMAX will need to be removed and reinstalled as described in PATCHING AND REPAIRS section after the eroded area is backfilled with compacted soil that is similar to material of the slope. After ARMORMAX is reinstalled, re-establish vegetation on the newly installed ARMORMAX and disturbed areas. Monitor the sites to determine if frequent watering may be required to establish vegetation. To minimize exposure to unwanted maintenance and repair, ARMORMAX armored slopes should be free of unauthorized vehicular traffic. Routine maintenance and slope inspections should be performed with rubber tired vehicles. Tracked equipment such as skid steers, excavators, or dozers should only be allowed to traffic over ARMORMAX in times of emergency after vegetation establishment is complete. Failure to control unauthorized traffic can result in ARMORMAX being damaged resulting in erosion below ARMORMAX during storm events. In addition, routine mowing maintenance should be used to keep the protected area free of unwanted brush, saplings, and trees. Selective herbicides that target only the unwanted plants can be used as long as the vegetation established with ARMORMAX is not impaired. Failure to control the sapling and tree growth can result in the trees being uprooted during a flood. MAINTAINING VEGETATION Good vegetative cover will ensure maximum performance of ARMORMAX. Vegetative cover care starts before a project is complete and is ongoing until all ARMORMAX is installed. Vegetative cover should be given every opportunity to grow and establish well. This will require that a contractor periodically fertilize, water, and mow the grasses as needed until a project is complete in the short-term, with the owner of the slope fulfilling the maintenance of the slope in a similar fashion for the long- term. For the entire lifecycle of ARMORMAX, every effort must be made to prevent unauthorized encroachments, grazing, vehicle traffic, the misuse of chemicals, or burning during inappropriate seasons. 1. After the installation of vegetation is complete, immediately water and soak the entire area using a fine spray to prevent erosion and loss of seeds. A suggested amount of water is identified below. Prior to installation if using sod, the sod pads in storage should be kept moist at all times and not stored for more than 24 hours from site arrival to installation. Warmer weather will necessitate more frequent applications than listed below. A. For each reach/segment of installed vegetation, watering shall be conducted immediately after each installation or the day's work. B. For initial vegetation establishment, water vegetation in a manner consistent with best practices for vegetation type and location. C. Establish a watering schedule and follow until vegetation is well established and will thrive in the absence of manual watering. D. Avoid excessive application of water, so that surface runoff does not occur. Runoff should be prohibited. However, additional watering may be required for repaired or damaged areas. 2. Fertilizer should be applied as needed to address any nutrient deficiencies revealed in soil testing. Propex Operating Company, LLC - 4019 Industry Drive, Chattanooga, TN 37416 - p 800 621 1273 - www.propexglobal.com ARMORMAX' Er, inaeretl Earth Armerrn System Page 15 of 17 3. Implement best practices for mowing over ARMORMAX. While ARMORMAX is designed to withstand non -hydraulic stresses such as mowing, there are procedures to minimize exposure to unwanted damage. A. Immediately after installation, signage and post shall be installed stating that "Vehicles and Pedestrians are Prohibited from Access" on the slopes and the newly installed vegetation. Signage shall be posted every 1,500 lineal feet. B. Vegetated areas should be mowed to a height no less than 6 inches and no greater than 12 inches from natural ground after a period of 60 days of growth. The excessive grass clippings created from mowing shall be evenly spread on the slope section outside of the armored area. Periodic and final grass mowing should be performed until final inspection and acceptance of slope work. Monitor the vegetated areas throughout winter months and generate reports as needed, noting any issues that should be addressed. Minimum mowing heights will depend on the vegetation density and should be as follows: i. 6" with 0 - 30% vegetation establishment ii. 4" with 30 - 70% vegetation establishment iii. 3" with 70 - 100% vegetation establishment C. To prevent damage to the newly established vegetation, the mowing tractor should be fitted with 3-rib agriculture tires. Note that tractors with 8-foot flail mowers provide best results. Tractors with 15-foot brush hogs should avoid sharp turns up the slope to prevent damage to vegetation. D. Mowing should not take place for a minimum of 48 hours after a rainfall event of 2 inches or more to minimize the potential for rutting and/or damage to the slope surface. Maintenance mowing of the slope should be done on a consistent basis to prevent vegetation growing to more than 3 feet in height. This will minimize thatch thickness and potential damage to ARMORMAX. If turn -around pads are present, operate mowing equipment utilizing the turn -around pads to the fullest extent. The mowing blade height over ARMORMAX should be a minimum of 8 inches. However, should vegetation grow to more than 3 feet in height, the mowing blade height for the condition should be a minimum of 12 inches. 4. Some special circumstances may exist. When mowing the crown of a slope with a crown or crest equal to or exceeding 20%, it should be mowed with an articulating arm mower to minimize the potential for the mower blades to catch ARMORMAX at the slope surface. The articulating arm mower should be level on the surface with the articulating arm extending over the crown. Pay close attention to areas where the slope changes. The mower blades should be set at a minimum height of 8 inches. If ARMORMAX is damaged by the mowing blades at any time, mowing should stop immediately and further direction should be obtained to continue activity. Repair the damaged area as described in the PATCHING AND REPAIRS section below. 5. ARMORMAX protected slopes are not as susceptible to animal burrowing due the tenacity of the ARMORMAX; however, inspections to detect the presence of burrowing animal activity are generally most effective immediately after the slope has been mowed. Animal burrows that are identified should be thoroughly excavated and inspected, backfilled with compacted soil that is similar to material of the slope, and vegetation re-established. This will avoid the possibility of water piping through unfilled portions of the burrows. Should ARMORMAX be damaged, it is to be repaired as described PATCHING AND REPAIRS section below. PATCHING AND REPAIRS ARMORMAX may require localized repair at times. For emergency repairs, an adequate supply of ARMORMAX should be maintained in inventory with the necessary tools to install. This will allow for a timely, initial repair of the system. 1. In order to identify areas in need of repair, the site should be patrolled immediately after mowing and after rain events of 2 inches or more. When patrolling look for areas of sparse vegetation, exposed edges of ARMORMAX, and areas where direct contact between ARMORMAX and the slope surface is compromised. ARMORMAX should be rated as Acceptable, Minimally Acceptable, or Unacceptable during inspection. Propex Operating Company, LLC - 4019 Industry Drive, Chattanooga, TN 37416 - p 800 621 1273 - www.propexglobal.com lntered Earth Armarin. System A. Acceptable (A) - The rated area is in satisfactory, acceptable condition, and will function as designed and intended during the rain event. ARMORMAX has no exposed edges, is installed tightly by maintaining direct contact to the slope surface with no rilling beneath, and has over 90% vegetation cover. There is no noticeable damage present. B. Minimally Acceptable (M) - The rated area has a minor deficiency that needs to be corrected. The minor deficiency will not seriously impair the functioning of the area during the next rain event; however, the overall reliability of the project will be lowered because of the minor deficiency. ARMORMAX has 75% vegetation cover with un-vegetated patches as large as one square yard. Edges of ARMORMAX are exposed with noticeable damage. Minimal erosion has occurred underneath ARMORMAX. C. Unacceptable (U) - The rated area is unsatisfactory. The deficiency is so serious that the area will not adequately function in the next rain event. ARMORMAX has been physically torn, ripped, or lifted from the slope surface. Less than 75% vegetation cover is present with un-vegetated patches being greater than 1 square yard, and there is evidence that erosion is occurring beneath ARMORMAX. 2. Repair any raised or exposed edges of ARMORMAX by driving existing and additional pins or anchors along the edges as necessary to securely fasten to the ground. Inspect areas where the vegetation is not growing on top of ARMORMAX. Many times this is an indicator that ARMORMAX has lost contact with the ground beneath. Check for voids beneath ARMORMAX and fill any holes, gullies, etc. with compacted fill material if possible. Replace ARMORMAX as described below. 3. To repair ARMORMAX, cut out and remove damaged areas in a square configuration a minimum size of 2 ft by 2 ft. Remove all vegetation and debris atop of ARMORMAX. Loosen the top 1 to 2 in of soil in the patch area then seed. The subgrade of area to be patched shall be prepared to be smooth and uniform and transition smoothly into the in -situ area. Cut a square ARMORMAX patch a minimum of 12 in greater than the damaged area for all four sides of the patch. Overlap the patch area in all directions a minimum of 12 in. The patch overlaps shall be tucked under the existing damaged ARMORMAX material (Figure 23 and Figure 24). EXISTING ARMORMAX 12' MINIMUM — FLOW ov 12" MINIMUM — 6' MINIMUM 6' MINIMUM —^I — 2' MINIMUM 12" PIN ARMORMAX PATCH - ANCHOR EXISTING ARMORMAX Figure 23: ARMORMAX Patch Cross Section Propex Operating Company, LLC - 4019 Industry Drive, Chattanooga, TN 37416 - p 800 621 1273 - www.propexglobal.com ARMORMAX' En. tneered Earth Armarin, System Page 17 of 17 2 FT MAXIMUM CENTER ON CENTER •- • • 1 ._. • •- •- • • • • 2 FT MAXIMUM • CENTER ON CENTER • 6 IN MAXIMUM _ CENTER ON CENTER AREA OF DAMAGED ARMORMAX • • • • .: • • • • •.` • . ♦ -• 1 O. • •• • t • • ' _ : . 6 IN MAXIMUM CENTER ON CENTER 2' MINIMUM 12" MINIMUM 2' MINIMUM ---- 12' MINIMUM TYPE 61 ANCHOR PIN Figure 24: ARMORMAX Patch Plan View 4. Install anchors on 2 ft (600 mm) (max) centers, and pins on 6 in (150 mm) (max) centers. For larger areas of damage, anchors should be installed to match existing anchor pattern and type. Once ARMORMAX is in place, vegetate per project specifications. SUMMARY Maintenance should consist of watering and weeding, repair of all erosion, and any re -seeding as necessary to establish a uniform stand of vegetation during construction and beyond. A minimum of 70% of the armored area should be covered with no bare or dead spots greater than 10 ft2 (1 m2). Establishing vegetation should not be mowed prior to 70% vegetative density and a minimum grass growth of 4 in (100 mm). Throughout the duration of the project, the contractor should be responsible for mowing to facilitate growth and should not let the vegetation in the armored areas exceed 18 in (450 mm). In addition, the Contractor should water all grassed areas as often as necessary to establish satisfactory growth and to maintain its growth throughout the duration of the project. After the project is complete, it is the responsibility of the Owner to maintain and upkeep all ARMORMAX installed areas for long term performance and best results as described herein for superior slope armoring. Propex Operating Company, LLC - 4019 Industry Drive, Chattanooga, TN 37416 - p 800 621 1273 - www.propexglobal.com Exhibit "D" Stormwater Structural Maintenance CHECKLIST FREQUENT INSPECTION DATE REPAIRS REQUIRED REPAIRS MADE NOTES Mowing Remove Trash and debris Inspect irrigation system operation Remove grass clippings Violations Noted MINOR INSPECTION Condition of Pond Amount of silt in pond Amount of silt in flume Amount of ponded water Amount of wetland vegetation Location of Erosion Percent of vegetation Condition of trash guard Location of Erosion MAJOR INSPECTIONS Condition of Stormwater Quality Structure Type of Stormwater Quality Structure Structure type and Condition Condition of Rip -Rap Condition of filtration system STORMWATER FACILITY MAINTENANCE AGREEMENT Rev. 11/19/2020 JLE 11 Berm or Embankment Settlement Location of erosion Evidence of Animals Evidence of Aquatic life Condition of Aeration Foundation STORMWATER FACILITY MAINTENANCE AGREEMENT Rev. 11/19/2020 JLE 12