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HomeMy WebLinkAboutStonewood Apartments - Stormwater Maintenance AgreementH ivision 1 N N. 2"" st — 2"d Floor Yakima, WA 98901 STORMWATER MAINTENANCE AGREEMENT THIS AGREEMENT TO MAINTAIN STORMWATEA FACILITIES IS ENTERED INTO TI4lS DAY OF 201_, BY AND BETWEEN THE CITY OF YAKIMA (HEREINAFTER -CITY-) AND VBT MNEWOOD LIP AND ITS HEIRS, SUCCESSORS, OR ASSIGNS (HEREINAFTER 'LANDOWNER"). SWPPP Permit No.: SWPPP180014 Parcel No.: 23040, 23046 Parcel Full' Legal Description: N ISE FT OF W 2SIS FT OF N1/2 NEI/4 SWI/4 NWI/4 AND N 140 FT OF E 264 FT OF N1/2 NW1/4 SWI/4 NW114, EX 1-82 R/W W 178 FT OF E 264 FT OF N1/2 NWI/4 SWI/4NWI/4 EX N 140 FT EX RD AL S LN Project Name: Stonewood Apartments Address: 120S East Spruce Street WITNESSETH WHEREAS, the Landowner has submitted for approval by the City a permit application and Site Plan, which require the construction and installation of stormwater management facilities pursuant to the City of Yakima Post -Construction Stormwater Runoff Ordinance; and WHEREAS, the Post -Construction Storm rater Runoff Ordinance requires, as a condition of permit approval, a maintenance agreement between the City and the Landowner to ensure the Landowner will construct and maintain the stormwater facilities identified in the Site Plan,- and WHEREAS, the City and the undersigned, its successors and assigns, including any homeowners association, agree that the health, safety, and welfare of the residents of the City of Yakima, Washington requires that on- site stormwater management facilities be constructed and maintained on the Property; and Stormwater Maintenance Agreement (April 2018) Page 1 WHEREAS, under said Ordinance it is provided that private stormwater management facilities must be maintained by the property owner, and a maintenance agreement must be executed before the development plan is approved. NOWar RE- in conside-ratj-qn of the for gping-wrimses; Dvenaftts contained hereiin� and thie following tents and conditions, the parties hereto agree as follows: 1. The Landowner shall construct and install stormwater management facilities as depicted and shown on the Site Plan, in accordance with the plans and specifications (aftachi Site Plan that shows type and locatiM n of stormwater facilities to be maintained). stormwater management, 7. The Landowner, its executors, administrators, assigns, and any other successors in interest, shall indemnify and hold the City and its agents and its employees, harmless for any and all damages, accidents, casualties, occurrences, or claims which might arise or be asserted against the City from the construction, presence, existence, or maintenance of the stormwater management facilities by the Landowner or the City. R. In the event a claim is asserted against the City, its agents, or employees, the City shall notify the Landowner and the Landowner shall defend at his own expense any suit based on such claim. if any judgment or claims against the City, its agents, or its employees shall be allowed, the Landowner shall pay all costs and expenses in connection therewith. 9. This Agreement shall be recorded among the land records of Yakima County, Washington, and shaH constitute a covenant running with the land, and shall be binding on the Landowner, its administrators, executors, assigns, heirs, and any other successors in interest. Stormwater Maintenance Agreement (April 2018) Page 2 - I I ORRAW"WN - Agreement to besigned, sealed and delivered: F-Iffl. «- Name/Title Address err- . - ) ss. County of Va*rrna I certify that I know or have satisfactory evidence that 5 is/are the person(s) who appeared before me, and said person(s) acknowledged that he/she/they signed this instrument and acknowledged it to be his/her/their free and voluntary act for the uses and prf mentioned in the instrument. Witness my hand and official seal hereto affixed the day and year first above, written. Notary Public in and for the State of Wash! residing in-Tk(ZrVX*, Dated at Yakima, Washington, this day of 2018. Approved By: City Egin�ee� Ci n C I i ttt as C[-1y'CONTRAcT NO: RAS OLU110N NO: Stornawater Maintenance Agreement (April 2018) Page 3 This project is not subject to this Core Element since the proposed management f4cilities retain and infiltrate all storniWater on-sith. # Current civil design plans, including stormwater improvements, are included as an attachment, The hydrologic analysis for the system was performed in HydroCAD and the results are attached. 7.1 On -Site Storr Design A detailed stormwater site plan has been developed showing planned stormwater facilities and is attached, The stormwater system was designed to infiltrate the Type IA, 25 -year, 24-hour design storm using the design infiltration rate. 7.3 Storinwater Quality Control Treatment for TSS, dissolved metals, oil, and grease is provided with the use of infiltration facilities. Storm titer Report PLSA Project No. 18216 November 20, 2018 Pae 4 No. 1 — Wetponds Maintenance Defect Conditions When Maintenance Is Results Expected When Component Needed Maintenance Is Performed General Trash & Debris Any trash and debris which exceed 5 Trash and debris cleared from site. cubic feet per 1 o000 square feet (this is about equal to the amount of trash it would take to fill up one standard size garbage can). In general, there should be no visual evidence of dumping, If less than threshold, all trash and debris will be removed as part of next scheduled maintenance. Poisonous Any poisonous or nuisance No danger of poisonous vegetation Vegetation and vegetation which may constitute a where maintenance personnel or the Noxious hazard to maintenance personnel or public might normally be. (Coordinate Weeds the public. with local health department) Any evidence of noxious weeds as Complete eradication of noxious weeds defined by state or local regulations. may not be possible. Compliance with state or local eradication policies (Apply requirements of adopted IPM required. policies for the use of herbicides). Contaminants Any evidence of oil, gasdine, No contaminants or pollutants present, and Pollution contaminants or other pollutants (Coordinate removaUcleanup with local water quality response agency). Rodent Holes Any evidence of rodent holes if Rodents destroyed and dam or be facility is acting as a dam or berm, or repaired. (Coordinate with local health any evidence of water piping through department; coordinate with Ecology dam or berm via rodent holes. Dam Safety Office if pond exceeds 10 acre-feet.) September 2004 Chapter 5 — Runoff Treatment Facility Design M# t ."r Dams Damresults change rl I function of y + IM M..l Facility designfunction. .r the facility. (Coordinate trapping of beavers and removal of dams with appropriate permitting ag -��i� . such �as wasps and� � ' sect r- M ° t t d M M � y a interfere activities. Apply insectid: des in compliance with adopted M'.. policies. Tree Growth Tree growth does not allow Trees do not hinder maintenance and Hazard maintenance access or interferes activities. Harvested trees should be Trees with maintenance activity (Le., slope recycled into mulch or other beneficial mowjngoval,t :'... M or i alders forMMM equipment ■ areRemove r M • . w: y trees. M not remove. If dead, diseased, or dying identified. (Use a certified Arborlst toArbor: determine of tree or removal Side Slopes Eroded damage over 2 inches deep Slope should be stabilized using s of Pond where cause of damage is still appropriath erosion control rheasure(s); presenthealth or where there is potential for -t., rock reinforcement, planting o continued erosion. graompaction. ,Any erosion observed on a If erosion is occurring on compacted compacted berm embankment. berms, a licensed civil engineer should be consulted to resolve source M. erosion. Storage 1.. Accumulated .y:. -.y -n:.: exceeds ., y''.., ,„ .r: 'M M'. M i I m# M#.,M 10% oft designed pond M.•M'',: shape and t:^• pond reseeded if otherwise specified or affects necessary to control erosion. inletting or outletting conditioh of the facility.Unless ISI 'w U III blll� �I Ilii) a, M _than VMI '* NN iii 4 yr. �w� ISI U_IId o eIpiI�IIV*II► d Liner is 1 .ppli threeble* covered. o.1 — Wetponds Maintenance Defect Conditions When Maintenance Is Results Expected When Component Needed Maintenance Is Performed Pond Berms Settlements Any part of berm which has settled 4 Dike is built back to the design (Dikes) inches lower than the design elevation. elevation. If settlement is apparent, measure berm to determine amount of settlement. Settling can be an indication of more severe problems with the be or outlet works. A licensed civil engineer should be consulted to determine the source of the settlement. Piping Discernable water flow through pond Piping eliminated. Erosion potential berm. Ongoing erosion with potential resolved. for erosion to continue. (Recommend a Goethechnical engineer be called in to inspect and evaluate condition and recommend repair of condificim) Emergency Tree GroWth Tree growth or, emergency spillways 'Trees should be removed. If root Overflow/ creates blockage problems and may system is small (base less than 4 Spillway and cause failure of the berm due to inches) the root system may be left in Berms over 4 uncontrolled overtopping. place. Otherwise the roots should be feet in height. removed and the berm restored, A Tree growth on berms over 4 feet in licensed civil engineer should be height may lead to piping through the consulted for proper berm/spillway be which could lead to failure of restoration. the berm. Piping Discemable water flow through pond Piping eliminated, Erosion potential berm. Ongoing erosion with potential resolved. for erosion to continue. (Recommend a Goethechnical engineer be called in to inspect and evaluate condition and recommend repair of condition.) September 2004 Chapter 5 — Runoff Treatment Facility Design 5A-3 . 1 — Wetponds Maintenance Defect Conditions When Maintenance Is Results Expected When Component Needed Maintenance Ils, performed Emergency Emergency Only eine layer of rock exists above locks and pad depth are restored to Overflow/ Overflow/ native soil in area five square feet or design standards. Spillway larger, or any exposure of native sail Spillway at the top of out flow path of spillway. (Rip -rap on inside slopes need not be replaced.) General Water level First cell is empty, doesn't hold water; Line the first cell to maintain at least 4 feet of water, Although the second cell may drain, the first cell must remain full to control turbulence of the incoming flown and reduce sediment resuspension; Trash and Accumulation that exceeds i CF per Trash and debris removed from pond. Debris 1000 -SF of pond area. Inlet/Outlet Pipe Inlet/Outlet pipe clogged with No clogging or blockage in the inlet sediment and/or debris material: and outlet piping. Sediment Sediment accumulations in pend Sediment removed from pond bottom. Accumulation in bottom that, exceeds the depth of Pond Bottom sediment zone plus 6 -inches, usually in the first cell. Oil Sheen on Prevalent and visible oil sheen. Coil removed from water using oil - Water absorbent pads or vector truck. Source of oil located and corrected., If chronic low levels of oil persist; plant wetland plants such as :/uncus effusus (soft rush) which can uptake small concentrations of oil. Erosion Erosion of the pond's side slopes Slopes stabilized using proper and/or scouring of the pond bottom, erosion control measures and repair that exceeds 6 -inches, or where methods., continued erosion is prevalent. Settlement of Any part of these components' that Dikelberm is repaired to Pond Dike/Berm ' has settled 4 -inches or lower than the specifications. design elevation, or inspector determines dike/berm is unsound. Internal Bernd Berm dividing cells should be level. Berra surface is leveled so that water flows evenly over entire length of berm. Overflow Pock is missing and soil is exposed Flocks replaced to specifications. Spillway at top of spillway or outside slope. Chapter 5 — Runoff Treatment Facilityr resign September 2004 Bio-infiltration/Infiltration Tren eat asi s Maintenance � Defect � Conditions When Maintenance Is �� -- Results Expected Component eek d Whop Maintenance Is Perfoffned General Trash & Debris See"Wetponds" (No. 1). See "Wetponds" (No. 1). Poisonous/Noxious See "Wetponds" (No. 1). See "Wetponds" (No. 1). Vegetation Contaminants and See "Wetponds" (No. 1). See "Wetponds" (No, 1). Pollution Rodent Roles See "Wetponds" (No. 1) See "Wetponds" (No. 1). Storage Area Sediment Water ponding in infiltration pond after Sediment is removed rainfall ceases and appropriate time and/or facility is cleaned: allowed for infiltration; so that infiltration works according systepercolation test it or test of facility ( p p Y to desir to design. indicates facility is only working at 90% of its designed capabilities. If two inches or more sediment is present, remove). Rack Filters Sediment and By visual inspection, little or no water flows Gravel in rock filter is Debris through filter during heavy rain storms. replaced. Side Slopes of Erosion S "Wetponds" (No. -1). See "Wetponds" (No. 1). Fond' Emergency Tree Growth See "Wetponds" (No. 1)., See "Wetponds' (No. 1), Overflow Spillway and Berms over feet in height; Piping See "Wetponds" (No. 1). See "Wetponds" (No. 1). Emergency Rack Missing See "Wetponds" (No. 1). See "Wetponds" (No. 1). Overflow Spillway Erosion See "Wetponds" (No._ 1). See "Wetponds" (No. 1). Ire -Settling Ponds Facility or sump " or designed sediment trap depth of Sediment is removed. and Vaults filled with Sediment sediment: and/or debris September 2004 Chapter 5 -- Runoff Treatment Facility Dein A- ae 5 Itch Basins intsnanice Defect Conditions When Maintenance Is Needed Results Expeoted When ComponentMaintenance is performed General Trash & Trash or debris which is located immediately No Trash or debris located Debris In front of the catch basin opening or is immediately in front of blocking inletting capacity of the basin by catch basin or on grate more than 10%. opening. Trash or debris tin the basin) that exceeds No trash or debris in the bag% of the sump depth as measured from the catch basin. bottom of basin to invert of the lowest pipe Into or out of the basin, but in no case less than a minimum of 6 inches clearance from the debris surface to the invert of the lowest pipe. Trash or debris in any inlet or outlet pipei Inlet and outlet pipes free blacking more than 113 of its height. of trash or debris. Dead animals or vegetation that could No dead animals or generate odors that could cause complaints vegetation present within or dangerous gases (e.g., methane). the catch basin. Sediment Sediment tin the basin) that exceeds 60 No sediment in the catch percent of the sump depth as measured from basin the bottom of basin to invert of the lowest pipe into or out of the basin, but in no case less than a minimum of S inches clearance from the sediment surface to the Invert of the lowest pipe, Structure Top slab has holes larger than 2 square Top slab is free of holes Damage to inches or cracks wider than 1/4 inch and cracks. Frame and/or Tap Slab (intent is to make sure no material is running into basin). Frame not sitting flush on top slab, i,e,, Frame is sitting flush on the separation of more than 314 inch of the frame riser rings or top slab and from the top slab, Frame not securely firstly attached. attached Fractures or Maintenance person judges that structure is Basin replaced or repaired Cracks in unsound. to design standards. Basin Walls/ Bottom Grout fillet has separated or cracked wider Pipe is regrouted and than /2 inch and lunger than 1 foot at the secure at basin wail, joint of any inletJoutlet pipe or any evidence of soil particles entering catch basin through _ cracks. Settlementt if failure of basin has created a safety, Basin replaced or repaired Misalignment function, or design problem: to design standards. Vegetation Vegetation growing across and blocking more No vegetation blocking than 10% of the basin opening. opening to basin. Vegetation growing in inlet/outlet pipe joints No vegetation or root that is more than slay inches tall and less than growth present. six inches apart. . 5 — Gatch Basins Maintenance Defect t ConditionsWien Mal7ritanance is Needed Results Expected When Component ai tenan a is perfortned, Contamination See "Wetponds" (No. 1). No pollution present. and Pollution Catch Basin Ferrer Cover Not in Craver is missing or only partially in place. Catch basin cover us closed Place Any open catch basin requires maintenance. Locking Mechanism cannot be opened by one Mechanism opens with Mechanism maintenance person with proper tools. Bolts proper tools. Not 'J Working into frame have less than 112 inch of thread. Cover Difficult One maintenance person cannot remove lid Cover can be removed by to Remove after applying normal lifting pressure. one maintenance person. (intent is keep cover from sealing off access to maintenance.) Ladder Ladder rungs Ladder is unsafe due to missing rungs, not Ladder meets design Unsafe securely attached to basin avail, standards and alloys misalignment, rust,: cracks, or sharp edges., maintenance person safe access. Metal Crates Grate opening Crate with opening wider than 718 inch. Crate opening meets (if Applicable) unsafe design standards. Trash and Trash and debris that is blocking more than Grate free of trash and Debris 20% of grate surface inletting capacity. debris. Damaged or Grate missing or broken member(s) of the Grate is in place and meets Missing. grate. design standards.