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HomeMy WebLinkAbout20141230000808 STORM WATER EASEMENT AND MAINT AGREEMENT 6/1/2014N� v7- 21 -os o�-°`l s� 07- zl -oS' o4U�� 20161230000808 FIRST AMERICAN EAS 163.00 PAGE-001 OF 020 12/30/2014 11:37 KING COUNTY, WA Above this line reserved for recordina information. STORM WATER EASEMENT AND MAINTENANCE AGREEMENT FAC13- 0005 `:li LIfaBll:�`: I`6R Vt1I.7i ? ?.TZ.i'�'.D / ve. Reference # (if applicable): N/A 17f- .n ;,,`0:kp ; Grantor /Borrower: Orion Industries Grantee /Assignee /Beneficiary: City of Auburn Legal Description /STR: 7- 21N -05E and 12- 21N -04E Assessor's Tax Parcel ID#: 000080 -0026, 000080 -0022 THIS EASEMENT AND AGREEMENT made and entered into this �_ day of �u-^t E 2014, by and between the City of Auburn, a municipal corporation of King County, Washington, hereinafter referred to as "CITY" and Orion Industries, a Washington nonprofit corporation hereinafter referred to as `PROPERTY OWNER ". WHEREAS, PROPERTY OWNER has applied for certain permits with the CITY for the construction of facilities located at 1580 A Street NE, which create impervious surface; and WHEREAS, the PROPERTY OWNER will complete a storm system; and WHEREAS, the PROPERTY OWNER and the CITY desire that the storm system be maintained to provide adequate facilities for controlling both the quantity and quality of storm drainage; and WHEREAS, for maintenance of a storm system it is necessary to have appropriate right -of -way to bring in equipment to conduct maintenance functions; and WHEREAS, the parties desire the maintenance requirement to be a covenant running with the land and binding upon all heirs, successors and assigns of both parties; and WHEREAS, the parties desire that this Agreement be recorded to advise heirs, successors and assigns of both parties as to the existence of this easement and agreement; and WHEREAS, an easement is needed to bring in maintenance equipment; and WHEREAS, the parties are both desirous of permitting inspection of the storm system to make certain that it is functioning properly and for purposes of determining the appropriate repairs. NOW, THEREFORE, BASED UPON MUTUAL COVENANTS TO BE DERIVED THE PARTIES AGREE AS FOLLOWS: *iq Co. R Ewrd6 L vision By SFa, 1�4 Dsrwty 03 FZ'' RICAN---- - jo 143 Return Address: City of Auburn City Clerk 25 West Main Auburn, WA 98001 N� v7- 21 -os o�-°`l s� 07- zl -oS' o4U�� 20161230000808 FIRST AMERICAN EAS 163.00 PAGE-001 OF 020 12/30/2014 11:37 KING COUNTY, WA Above this line reserved for recordina information. STORM WATER EASEMENT AND MAINTENANCE AGREEMENT FAC13- 0005 `:li LIfaBll:�`: I`6R Vt1I.7i ? ?.TZ.i'�'.D / ve. Reference # (if applicable): N/A 17f- .n ;,,`0:kp ; Grantor /Borrower: Orion Industries Grantee /Assignee /Beneficiary: City of Auburn Legal Description /STR: 7- 21N -05E and 12- 21N -04E Assessor's Tax Parcel ID#: 000080 -0026, 000080 -0022 THIS EASEMENT AND AGREEMENT made and entered into this �_ day of �u-^t E 2014, by and between the City of Auburn, a municipal corporation of King County, Washington, hereinafter referred to as "CITY" and Orion Industries, a Washington nonprofit corporation hereinafter referred to as `PROPERTY OWNER ". WHEREAS, PROPERTY OWNER has applied for certain permits with the CITY for the construction of facilities located at 1580 A Street NE, which create impervious surface; and WHEREAS, the PROPERTY OWNER will complete a storm system; and WHEREAS, the PROPERTY OWNER and the CITY desire that the storm system be maintained to provide adequate facilities for controlling both the quantity and quality of storm drainage; and WHEREAS, for maintenance of a storm system it is necessary to have appropriate right -of -way to bring in equipment to conduct maintenance functions; and WHEREAS, the parties desire the maintenance requirement to be a covenant running with the land and binding upon all heirs, successors and assigns of both parties; and WHEREAS, the parties desire that this Agreement be recorded to advise heirs, successors and assigns of both parties as to the existence of this easement and agreement; and WHEREAS, an easement is needed to bring in maintenance equipment; and WHEREAS, the parties are both desirous of permitting inspection of the storm system to make certain that it is functioning properly and for purposes of determining the appropriate repairs. NOW, THEREFORE, BASED UPON MUTUAL COVENANTS TO BE DERIVED THE PARTIES AGREE AS FOLLOWS: *iq Co. R Ewrd6 L vision By SFa, 1�4 Dsrwty Section 1, EASEMENT PROPERTY OWNER hereby grants a non - exclusive easement to the City for access, inspection, and maintenance of a storm water system as set forth in this Agreement and the attached Storm Water Pollution Prevention Plan, over, under and on that real estate described in Exhibit "A" & "B" and on that portion of the property as showing on the approved Record Drawings revised pursuant to construction records for the City of Auburn under Permit No. FAC13 -0005, which record drawings are hereby incorporated by reference as if set out in full (such area is referred to herein as the "Easement Area "). This easement shall be a burden to that real estate which is legally described and attached as Exhibit "A" & "B" and incorporated herein by this reference, and shall be a benefit to the City Storm Drainage Utility System. Section 2, HEIRS, SUCCESSORS AND ASSIGNS This Agreement shall be binding upon the heirs, successors and assigns of the parties. Section 3, MAINTENANCE The PROPERTY OWNER agrees to maintain the storm system in accordance with the ordinances and all applicable codes of the CITY and the Storm Water Pollution Prevention Maintenance and Operation Schedule attached as Exhibit "C" and incorporated herein by this reference. The PROPERTY OWNER does hereby agree that the CITY may, upon at least one business day's prior notice, or less if an emergency, as defined in ACC 3.10.050, exists, enter onto the property of the PROPERTY OWNER via the easement described above to inspect and perform necessary maintenance if, after the PROPERTY OWNER is given written notice to maintain, the PROPERTY OWNER fails to maintain within a reasonable time of such notice. Further, the PROPERTY OWNER agrees the CITY may enter onto the property of PROPERTY OWNER via the easement described above to perform emergency maintenance in the event of the storm system's failure which might result in adverse impacts(s) on public facilities or private facilities of other property owners. In both events the PROPERTY OWNER agrees to reimburse the CITY for the actual costs incurred by the CITY in maintaining the storm system. Should the CITY incur attorney's fees and /or costs in enforcing the agreement and /or in maintaining or collecting maintenance fees, the PROPERTY OWNER agrees to pay reasonable attorney's fees and all costs incurred by the CITY. In connection with any entry onto PROPERTY OWNER'S Property, including the Easement Area, the City shall use reasonable efforts to perform any work in the Easement Area in a manner that minimizes interference and disruption to PROPERTY OWNER or its employees, agents, contractors, customers and other invitees. PROPERTY OWNER agrees to make reasonable accommodations to permit the City access to the Easement Area and the storm water system, and to coordinate such work so that disruption to the City's other operations is minimized. Section 4, ACKNOWLEDGMENT OF OTHER ENFORCEMENT ACTIONS PROPERTY OWNER acknowledges that there may be liability for violations of City codes that could result in additional fines and /or the possibility of incarceration in addition to the fees for maintenance should violations occur. Section 5, ADDITIONAL COVENANTS PROPERTY OWNER reserves the right to use and occupy the Easement Area in any manner not inconsistent with the rights conveyed herein, provided that such use and occupancy by the PROPERTY OWNER shall not interfere with the City's use of the Easement Area pursuant to this Agreement. In the event any of PROPERTY OWNER'S Property, or any portion thereof, is in any manner disturbed by the activities of the City or its contractors or agents relating to, or arising from, the exercise of any of the City's rights under this Easement, the City shall promptly remove all debris and restore PROPERTY OWNER's Property to the condition in which such existed at the commencement of such activities. [signatures on the following pages] EXECUTED as of the date first written above. ORION INDUSTRIES, a Washington non rofilt cor oration J By: Its: J�fP S/ C �� Date STATE OF WASHINGTON ) ) ss COUNTY OF KING ) �� I certify that I know or have satisfactory evidence that J ° il are the person(s) who appeared before me, and said persons acknowledged that he /she /they signed this instrument, on oath stated that he /she /they are the property owners and as such are authorized to execute the instrument and acknowledged it as his /her /their free and.voluntary act for the uses and purposes mentioned in this instrument. Dated S/ 2 r Notary Public State of Washington LAURA D HAMAN My Appolntment Expires Jul 1, 2014: Lour-0- D 1- ICirna ✓n ary Public in and for the State of Washington >iding at Kenn Courrly appointment expires Ju l I; 2-01y CITY OF AUBURN Storm Drainage Engineer and authorized signatory STATE OF WASHINGTON ) ) ss. COUNTY OF KING ) I certify that I know or have satisfactory evidence that Tim Carlaw is the person who appeared before me, and said person acknowledged that he signed this instrument, on oath stated that he was authorized to execute the instrument and acknowledged it as the STORM DRAINAGE ENGINEER of THE CITY OF AUBURN to be the free and voluntary act of such party for the uses and purposes mentioned in this instrument. Dated & /// ) � u" gg111111"Cs� �/ Z aP V� 2_ OP WAS t kA2 �� /, 614. . Notary Public in and for the State of ashin ton Residing My appointment expires 1 Retum Address: City of Auburn City Clerk 25 West Main Auburn, WA 98001 Above this line reserved for recording information. STORM WATER EASEMENT AND MAINTENANCE AGREEMENT FACl3 -0005 Reference # (if applicable): N/A Grantor /Borrower: Orion Industries Grantee /Assignee /Beneficiary: Legal Description /STR: Assessor's Tax Parcel ID #: City of Auburn 7- 21N -051-` and 12 -21N -046 000080 -0022 EXHIBIT A NEW PARCEL OF CITY OF AUBURN BOUNDARY LINE ADJUSTMENT NO. 13-0004, RECORDED UNDER RECORDING NUMBER 20140203900004, RECORDS OF KING COUNTY, WASHINGTON, MORE PARTICULARLY DESCRIBED AS FOLLOWS: PARCEL A, CITY OF AUBURN BOUNDARY LINE ADJUSTMENT NO. BLA 12 -0003, RECORDED JANUARY 24, 2013, AS RECORDING NO. 20130124900008, IN KING COUNTY, WASHINGTON; AND LOTA OF CITY OF AUBURN SHORT PLAT NO. SPL 0005 -90, AS RECORDED JULY 9, 1990 UNDER RECORDING NO. 9007091058, RECORDS OF KING COUNTY, WASHINGTON; EXCEPT THE NORTH 40.00 FEET OF SAID LOT A OF CITY OF AUBURN SHOR I PLAT NO. SPL 0005-90. EXCEPNNG THEREFROM THAT PORTION DEDICATED TO THE CIIY OF AURURN BY DEED RECORDED JULY 10, 2013 AS RECORDING NO. 20130710001171. EXHIBIT B CB 7�, —� CB i0 7` 1 - ; TAM, CS #4 CB 08 �If CB 49( CB 43-' \J CB MO ,1 }j CB f 2- ( S \` 0'` CEI 40 I V ��' c U'�► I li.t = _ 3 �CB 412-1 ' 1 � P ,0 38375 T • rue ut . eq i weft' F� 7 SI�`��`ti� ,�S70d'A L CHI I) I 9' 1..I.. 1'( —' 3 14 2014 �U.'.!.'.!. L,LI,I H. «l:Um�2 «n..l h+ae�3 �q�11 -h or..1.!vlb�•f o�. «. v.1 -'.r oLLf•I fa . SGCICf For. Job Numbcr ho ra�:a, 1 " =12G' Vei:col !d /A LATITUDE DEVELOPMENT 15863 GFigV 18216 -A g Gvz saunt 1801 WEST VALLEY HWY S�= I:tM. 'r:F 950.72 (a251251- 5222 1_ (425)251 -8792 F>X Title- CIVIL $hCE4 CIVIL ENGINEERING, LAND � FL NNING. SURVEYING, SITE PLAN 1 1 ENVIRONMENT SERVI�:ES _ of rkow•� e K checked %P 4PDIOImd EXHIBIT V STORM WATER POLLUTION PREVENTION MAINTENANCE and OPERATION SCHEDULE for ORION AEROSPACE SEPA NO. SEP12 -0030 FAC NO. FAC13 -0005 GRA NO. GRA12 -0011 Site Address: The project is located in the Southwest quarter of Section 7, Township 21 North, Range 5 East and the Southeast quarter of Section 12, Township 21 North, Range 4 East, W.M., south side of Auburn Airport at 'A' Street N.E. The tax parcel number is 000080 -0026 and 000080 -0022. Introduction: This storm drainage technical information report has been prepared to address the City of Auburn's site development and storm drainage requirements for the proposed Orion Aerospace located at south of Auburn Airport at 'A Street N.E. The site has an area of approximately 4.99 acres and is currently vacant pastureland with a few trees and brush. The subject site will be an aerospace building with surrounding parking, landscaping, and a stormwater pond. According to the City of Auburn's Construction Standards for storm water management, the city requires storm water quantity and quality control to all proposed developments. We have proposed to collect all of the storm water runoff from the landscaped, building and pavement areas in a series of catch basins. This water will be conveyed by storm drainage pipe to a storm water wetland/ detention pond located along the eastern side of the site. Here the storm water will be released into a large 5- to 6 -foot deep ditch flowing westerly along the northern property line of the site through 36- inch - diameter culvert under 'B' Street N.W. then northerly for several thousand feet. The ultimate discharge point is into Mill Creek. Plan Goal: The specific purpose for the storm water facility is to minimize pollution that is typically associated with modern development. In general, pollution from motor vehicles and pollution generated from erosion. Attached to this narrative is a maintenance manual, which offers guidelines to the owner for storm water facility maintenance. Prevention BMP'S: The catch basins shall have stenciled on them "DUMP NO WASTE — DRAINS TO STREAM." The owner shall be responsible for sweeping the lot, installing storm drainage stenciling and provide spill control procedures. In case of spill call DOE at 1-425- 649 -7000. The catch basins, detention /wetpond, and control structures will be visually inspected for accumulation of debris and silt and will be maintained as required by this pollution prevention plan and attachments. • Maintenance Standards for Drainage Facilities (from the City of Auburn Surface Water Management Manual, November 2009) No. 1 — Detention Pond No. 4 — Control Structure /Flow Restrictor No. 5 — Catch Basins No. 6 — Debris Barriers (e.g., Trash Racks) No. 11 - Wetponds Treatment BMP'S: A two - celled detention /stormwater wetland has been installed to treat runoff for conventional pollutants. The stormwater wetland was designed to treat 64% of the 2 -year storm event (water quality storm) for water quality treatment. In addition, the detention pond was designed to detain the volume created from releasing half the existing 2 -year, 10, 25, and 100 -year storm events, while holding the developed 2 -year, 10, 25, and 100 -year storm volumes. Inspection /Maintenance: Regular inspections of the drainage facilities should be carried out twice per year, in the spring and fall. The responsible party should keep records of these inspections available for review by the City. Additional inspections may be required after severe storms. Routine maintenance of the site will include mowing, care of landscaping and the removal of trash and debris from the drainage system. The parking lots and driveways should be kept clean and in repair. Events such as major storms or heavy winds will require immediate inspections for damages. To ensure proper water quality and treatment, the detention /stormwater wetland must be properly maintained. Be careful to avoid introducing landscape fertilizer to receiving waters or groundwater. If pond side slopes become eroded over 2" deep, stabilize by using appropriate erosion control measures (e.g., rock reinforcement, planting of grass, compaction). Catch basins shall be cleaned when sump is 1/3' full of sediment or debris. Person of Responsibility: Jack Kinnemann Orion Industries 1580 A Street NE Auburn, WA 98002 (253) 661 -7805 jack.kennemann @orionquality.com Design Engineer: Barghausen Consulting Engineers, Inc. 18215 — 72nd Avenue South Kent, WA 98032 (425) 251 -6222 Plan and /or Information Updates: The City of Auburn Storm Drainage Utility section is to review and approve any changes to this Storm Water Pollution Prevention Plan prior to changes in its implementation. Additionally, any changes in ownership or person of responsibility are to be reported to the City Storm Drainage Utility section. INSPECTION / MAINTENANCE CHECKLIST STRUCTURE DATE OF INSPECTION /MAINTENANCE Results/ Maintenance Date Inspection All Catch Basins Results Maintenance Done Storm Detention/ Inspection Wetland Results Maintenance Done Inspection Conveyance Pipes Results Maintenance z Done Flow Control Inspection Structure Results Maintenance Done STORMWATER TREATMENT WETLAND MAINTENANCE 8.2.3.11 Operation and Maintenance • Inspect wetlands at least twice per year during the first three years during both growing and non - growing seasons to observe plant species presence, abundance, and condition; bottom contours and water depths relative to plans; and sediment, outlet, and buffer conditions. • Schedule maintenance around sensitive wildlife and vegetation seasons. • Plants may require watering, physical support, mulching, weed removal, or replanting during the first three years. • Remove nuisance plant species and replant desirable species. Maintenance Standards for Drainage Facilities: The facility- specific maintenance standards contained in this section are intended to be conditions for determining if maintenance actions are required as identified through inspection. They are not intended to be measures of the facility's required condition at all times between inspections. In other words, exceeding these conditions at any time between inspections and /or maintenance does not automatically constitute a violation of these standards. However, based upon inspection observations, the inspection and maintenance schedules shall be adjusted to minimize the length of time that a facility is in a condition that requires a maintenance action. No. 1 — Detention Ponds 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 1,000 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 weeds hazard to maintenance personnel or public might normally be. (Coordinate 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 (Apply requirements of adopted IPM State or local eradication policies I policies for the use of herbicides). required. Contaminants Any evidence of oil, gasoline, No contaminants or pollutants present. and Pollution contaminants or other pollutants. (Coordinate removal /cleanup with local water quality response agency). Rodent Holes Any evidence of rodent holes if Rodents destroyed and dam or berm 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.) No. 1 - Detention Ponds Maintenance Defect Conditions When Maintenance Is Results Expected When Component Needed Maintenance Is Performed Beaver Dams Dam results in change or function of Facility is returned to design function. the facility. (Coordinate trapping of beavers and removal of dams with appropriate permitting agencies.) Insects When insects such as wasps and Insects destroyed or removed from site. hornets interfere with maintenance Apply insecticides in compliance with activities. adopted IPM 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 (i.e., slope recycled into mulch or other beneficial mowing, silt removal, vactoring, or uses (e.g., alders for firewood). equipment movements). If trees are Remove hazard trees. not interfering with access or maintenance, do not remove. If dead, diseased, or dying trees are identified. (Use a certified Arborist to determine health of tree or removal requirements.) Side Slopes Erosion Eroded damage over 2 inches deep Slopes should be stabilized using of Pond where cause of damage is still appropriate erosion control measure(s); present or where there is potential for e.g., rock reinforcement, planting of continued erosion. grass, compaction. 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 of erosion. Storage Area Sediment Accumulated sediment that exceeds Sediment cleaned out to designed pond 10% of the designed pond depth shape and depth; pond reseeded if unless otherwise specified or affects necessary to control erosion. inlefting or outletting condition of the facility. Liner (If Liner is visible and has more than Liner repaired or replaced. Liner is fully Applicable) three 1/4 -inch holes in it. covered. No. 1 - Detention Ponds Maintenance Defect Conditions When Maintenance Is Results Expected When Component Needed Maintenance Is Performed Pond Berms Settlements Any part of berm that 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 berm 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 condition. Emergency Tree Growth Tree growth on 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. Tree growth on berms over 4 feet in removed and the berm restored. A height may lead to piping through the licensed civil engineer should be berm which could lead to failure of consulted for proper berm /spillway the berm. restoration. 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 condition. Emergency Emergency Only one layer of rock exists above Rocks and pad depth are restored to Overflow/ Overflow/ native soil in area five square feet or design standards. Spillway Spillway larger, or any exposure of native soil at the top of out flow path of spillway. (Riprap on inside slopes need not be replaced.) Erosion See "Side Slopes of Pond." No. 4 - Control Structure /Flow Restrictor Maintenance Defect Condition When Maintenance is Needed Results Expected Component When Maintenance is Performed General Trash and Debris Material exceeds 25% of sump depth or 1 Control structure (Includes Sediment) foot below orifice plate. orifice is not blocked. All trash and debris removed. Structural Damage Structure is not securely attached to Structure securely manhole wall. attached to wall and outlet pipe. Structure is not in upright position (allow up Structure in correct to 10% from plumb). position. Connections to outlet pipe are not watertight Connections to outlet and show signs of rust. pipe are watertight, structure repaired or replaced and works as designed. Any holes, other than designed holes, in the Structure has no structure. holes other than designed holes. Cleanout Gate Damaged or Missing Cleanout gate is not watertight or is missing. Gate is watertight and works as designed. One maintenance person cannot move up Gate moves up and and down gate. down easily and is watertight. Chain /rod leading to gate is missing or Chain is in place and damaged. works as designed. Gate is rusted over 50% of its surface area. Gate is repaired or replaced to meet design standards. Orifice Plate Damaged or Missing Control device is not working properly due to Plate is in place and missing, out of place, or bent orifice plate. works as designed. Obstructions Any trash, debris, sediment, or vegetation Plate is free of all blocking the plate. obstructions and works as designed. Overflow Pipe Obstructions Any trash or debris blocking (or having the Pipe is free of all potential of blocking) the overflow pipe. obstructions and works as designed. Manhole See "Closed See "Closed Detention Systems" (No. 3). See "Closed Detention Systems" Detention Systems" (No. 3). (No. 3). Catch Basin See "Catch Basins" See "Catch Basins" (No. 5). See "Catch Basins' (No. 5). (No. 5). No. 5 — Catch Basins Maintenance Defect Conditions When Maintenance is Needed Results Expected When Component Maintenance 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 (in the basin) that exceeds 60 No trash or debris in the percent of the sump depth as measured from catch 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 six inches clearance from the debris surface to the invert of the lowest pipe. Trash or debris in any inlet or outlet pipe Inlet and outlet pipes free blocking more than 1/3 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 (in 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 6 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 Top 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 separations of more than 3/4 inch of the the riser rings or top slab frame from the top slab. Frame not securely and firmly 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 1/2 inch and longer than 1 foot at the secure at basin wall. joint of any inlet/outlet pipe or any evidence of soil particles entering catch basin through cracks. Settlement/ If failure of basin has created a safely, 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. No. 5 — Catch Basins Maintenance Defect Conditions When Maintenance is Needed Results Expected When Component Needed Maintenance is General Trash and Trash or debris that is plugging more performed Debris Vegetation growing in inlet/outlet pipe joints No vegetation or root Metal Damaged/ that is more than six inches tall and less than growth present. Missing six inches apart. than 3/4 inch. Contamination See "Detention Ponds" (No. 1). No pollution present. and Pollution Bars are missing or entire barrier Bars in place according to design. Catch Basin Cover Not in Cover is missing or only partially in place. Catch basin cover is Cover Place Any open catch basin requires maintenance. closed. Locking Mechanism cannot be opened by one Mechanism opens with Mechanism maintenance person with proper tools. Bolts proper tools. Not Working into frame have less than 1/2 inch of thread. Cover Difficult One maintenance person cannot remove lid One maintenance person to Remove after applying normal lifting pressure. can remove cover. (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 wall, standards and allows misalignment, rust, cracks, or sharp edges. maintenance person safe access. Metal Grates Grate opening Grate with opening wider than 7/8 inch. Grate 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 Missing. grate. meets design standards. No. 6 — Debris Barriers (e.g., Trash Racks) Maintenance Defect Condition When Maintenance is Results Expected When Components Needed Maintenance is Performed General Trash and Trash or debris that is plugging more Barrier cleared to design flow Debris than 20% of the openings in the barrier. capacity. Metal Damaged/ Bars are bent out of shape more than 3 Bars in place with no bends more Missing inches. than 3/4 inch. Bars. Bars are missing or entire barrier Bars in place according to design. missing. Bars are loose and rust is causing 50% Barrier replaced or repaired to deterioration to any part of barrier. design standards. Inlet/Outlet Debris barrier missing or not attached to Barrier firmly attached to pipe. Pipe pipe. No. 11 - Wetponds Maintenance Defect Condition When Maintenance Results Expected When Maintenance is Component is Needed Performed General Water level First cell is empty, doesn't hold Line the first cell to maintain at least 4 feet water, of water. Although the second cell may drain, the first cell must remain full to control turbulence of the incoming flow and reduce sediment resuspension. Trash and Accumulation that exceeds 1 Trash and debris removed from pond. Debris CF per 1000 -SF of pond area. Inlet/Outlet Inlet /outlet pipe clogged with No clogging or blockage in the inlet and Pipe sediment and /or debris material. outlet piping. Sediment Sediment accumulations in Sediment removed from pond bottom. Accumulation pond bottom that exceeds the in Pond depth of sediment zone plus 6- Bottom inches, usually in the first cell. Oil Sheen on Prevalent and visible oil sheen. Oil removed from water using oil - Water absorbent pads or vactor truck. Source of oil located and corrected. If chronic low levels of oil persist, plant wetland plants such as Juncus effusus (soft rush) that can uptake small concentrations of oil. Erosion Erosion of the pond's side Slopes stabilized using proper erosion slopes and /or scouring of the control measures and repair methods. pond bottom, that exceeds 6- inches, or where continued erosion is prevalent. Settlement of Any part of these components Dike/berm is repaired to specifications. Pond that has settled 4- inches or Dike /Berm lower than the design elevation, or inspector determines dike /berm is unsound. Internal Berm Berm dividing cells should be Berm surface is leveled so that water level. flows evenly over entire length of berm. Overflow Rock is missing and soil is Rocks replaced to specifications. Spillway exposed at top of spillway or outside slope.