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HomeMy WebLinkAboutO&M Manual Indianapolis, IN | St. Louis, MO | .www.weihe.net | (800) 452-6408 Allan H. Weihe, P.E., L.S. - Founder OPERATIONS AND MAINTENANCE MANUAL For: INLOW PARK IMPROVEMENTS Address: 6310 E. Main Street Carmel, IN 46033 Hamilton County Project #W200371 Prepared For: Carmel Clay Parks and Recreation 1235 Central Park Drive East Carmel, IN 46032 Contact: Michael Klitzing, Director Phone: 317-573-4018 Prepared By: Colin Schroeder, P.E. Checked By: Russell Lee Webster II, P.E. Certified By: Russell Lee Webster II, P.E. Date: February 26, 2021 Revised: May 28, 2021 I AFFIRM, UNDER THE PENALTIES FOR PERJURY, THAT I HAVE TAKEN REASONABLE CARE TO REDACT EACH SOCIAL SECURITY NUMBER IN THIS DOCUMENT, UNLESS REQUIRED BY LAW. – Russell Lee Webster II P.E. THIS INSTRUMENT PREPARED BY: Russell Lee Webster II P.E. PROFESSIONAL CERTIFICATION I AFFIRM, UNDER THE PENALTIES FOR PERJURY, THAT I HAVE TAKEN REASONABLE CARE TO REDACT EACH SOCIAL SECURITY NUMBER IN THIS DOCUMENT, UNLESS REQUIRED BY LAW. – Russell L. Webster II, PE THIS INSTRUMENT PREPARED BY: Russell L. Webster II, PE Prepared For: Inlow Park Improvements Carmel, IN Project #W200371 TABLE OF CONTENTS Operation and Maintenance Manual 1. Project Narrative 2. Definitions 3. Owner Acknowledgement 4. Location Maps 5. Checklist and Maintenance Activities · Permeable Pavers System · Dry Detention Basin with Native Plantings · Nyloplast Envirohood Structure Project Narrative Carmel Clay Parks and Recreation is proposing to partially re-develop Inlow Park, a 15.0 Acre park located in the City of Carmel, IN. The project will consist of new and existing storm sewer collecting stormwater from the project site and directing it to a new dry detention basin. There will also be new permeable paver parking space installed along the northwestern edge of the existing parking area. The paver system underdrain and overflow inlets will outlet into the new dry detention basin. The detention basin will be routed through a new outlet control structure and into a large wet detention basin adjacent to the site. Water quality treatment will be achieved by utilizing the permeable pavers to filter runoff from portions of the proposed improvements and the existing parking lot. Also, a Nyloplast Envirohood Structure will capture floating debris and heavy solids from runoff in the southern portion of the project. A secondary water quality benefit will be derived from using a dry detention basin with native plantings. Floodzone: Based upon a scaled interpretation of the Flood Insurance Map, Panel 227 of 300, Map No.18057 C0227 G for Hamilton County, Indiana, dated November 19, 2014 the subject tract IS NOT located within Zone AE (Special Flood Hazard Area inundated by 100-year flood-Base Flood Elevations determined) or Floodway Area in Zone AE as established by the Federal Emergency Management Agency for the National Flood Insurance Program. BMP Owner Contact Information: Carmel Clay Parks and Recreation 1235 Central Park Drive East Carmel, IN 46032 Contact: Michael Klitzing, Director Phone: 317-573-4018 mklitzing@carmelclayparks.com Definitions Best Management Practices (BMP): Best Management Practices, refer to structural or non-structural measures designed for the benefit of water quality and quantity. Urban stormwater runoff contains many types and forms of pollutants. When compared to stormwater run-off from pre-developed conditions, high concentrations and some contaminants that are not naturally present in surface runoff from undeveloped local lands are found. Runoff from undeveloped watersheds contains metals, nutrients, sediment particles, oxygen-demanding compounds, and other constituents. Once developed, constituent loads increase because surface runoff volumes increase and the sources of many of these pollutants also increase. Supplemental applications of compounds, such as fertilizers, also tend to increase the availability of some pollutants to stormwater runoff. Runoff water quality in urban areas can be extremely detrimental to local habitat. Paved surfaces and standing water bodies for stormwater management control elevate the temperature of water entering streams. Chemicals in standing water and ponds are oxidized, resulting in depressed levels of dissolved oxygen. Increased runoff volumes and rates create scour and deposition damage to instream habitat. Activities in urbanized areas, such as vehicular traffic, deposit pollutants such as heavy metals and oil & grease on paved surfaces where they easily wash off into the streams. BMP Owner: The owner of the BMP, typically the property owner. The BMP owner may also be the lessee of the property in the case of long-term leases of commercial and industrial zoned properties. The lessee is considered the bmp owner only if the lease specifically states that construction by the lessee must meet applicable local codes and regulations. Permeable Pavers System: The permeable pavers have open cells that are filled with gravel and are designed to let water enter into their surfaces, get detained in the rock base, and absorb into the ground beneath, or discharge through a subsurface drain. Paving systems that use hardscape surfaces (concrete, asphalt, or compacted gravel) will collect stormwater, causing it to pool or run off. Instead, permeable pavers have a porous surface that naturally mimics and recreates the way the ground reacts to rainwater. Refer to manufacturer guide in this report for more information. Dry Detention Basin with Native Plantings: A dry detention basin is an impoundment or excavated basin for the short-term detention of stormwater runoff from a completed development that allows a controlled release from the structure at downstream, pre-development flow rates. Conventional dry detention basins typically control peak runoff for 2-year and 10-year 24-hour storms. They are not specifically designed to provide extended dewatering times, wet pools, or groundwater recharge. The pond bottom will be planted with Native Plantings. There are a couple of key ways in which native plants support water quality. Native plants help reduce stormwater runoff. The deep roots of native plants are adapted to the soil and terrain conditions of the watershed. So they absorb and filter runoff more effectively than the short roots of many turf grasses and other ornamental plants. Native plants decrease the potential for harmful substances entering ponds. In addition, because native plants have evolved in environmental conditions like those in the watershed, they are adapted to survive here without extra fertilizers, pesticides and watering. Performing preventative maintenance regularly will prevent long term damage and reduce costs. It is recommended inspections be performed bi-annually and after major storm events. Stormwater Infrastructure: Storm water infrastructure and structures refers to structural or non-structural measures designed for the benefit of storm water conveyance. Storm water is the rainfall/ snowmelt that flows over our yards, streets, parking lots, and buildings and either enters the storm drain system or runs directly into a lake or stream. Owners of storm water infrastructure and structures are typically the property owner. The storm water infrastructure owner may also be the lessee of the property in the case of long-term leases of commercial and industrial zoned properties. The lessee is considered the owner only if the lease specifically states that construction by the lessee must meet applicable local codes and regulations. Catch basins: Catch basin/inlet cleaning and repair has traditionally been performed to respond to localized flooding problems in streets. Catch basins are inlets at the curb with a small trap (usually six inches to one foot deep) below the sewer pipe. These devices help to clean storm water because particles in street runoff settle into the trap before the water enters the storm sewers. Catch basins require regular cleaning of the sediment trap to be. The inlets do not trap sediments and don’t need cleaning unless they are plugged. Cleaning for either catch basins or inlets can be done by hand (e.g., with a clamshell or shovel) or with a vacuum truck. Nyloplast Envirohood Structure: The Envirohood is a attachment placed on the inside of a storm sewer catch basin or manhole. When installed on a structure with a sump basis, it is designed to prevent the outflow of floating debris, oil, and heavy solids. Conveyance Storm Pipes: A good rule of thumb is to conduct inspection of storm drain inlets and other drainage facilities at least once a year, prior to the beginning of the rainy season. Complete inspections early enough so that repairs can be made during dry weather. Catch basins/inlets should be inspected at least once every six months. Storm Pipes and culverts should be inspected every three to five years, or in response to a problem. Most agencies inspect their sewer pipes six inches or larger with a TV camera. All other parts of the system are inspected visually. Look for excessive silt build-up, erosion, unusual algal growth, cracked or collapsed pipes, misaligned joints, and other signs of problems such as a sheen on the water surface, discolored water, or an unpleasant odor. Check with product manufacturers or storm water handbooks for advice on what to look for when inspecting more sophisticated treatment devices such as flow splitters and diverters. When a problem is noted, take steps to correct the problem, or route this information immediately to the appropriate individual(s) in your organization who can respond. If needed, develop a good response plan to ensure quick follow-up in the future. Inspections Routine inspections are the responsibility of the BMP owner. Maintenance is also the responsibility of the owner. The BMP owner shall be financially responsible for any maintenance or repairs required by the City or its representatives during the City’s inspections. The approval maintenance plan and inspection forms provided with this manual should be used as guidance for performing maintenance activities. Completed inspection forms must be maintained by the BMP owner and produced upon request by the City. The City must be notified of any changes in BMP ownership, major repairs or BMP failure in writing within 30 days. The letter should be addressed to: Stormwater BMP Modifications Department of Engineering City of Carmel One Civic Square Carmel, IN 46032 The City and/or its representatives have the right to enter the property to inspect BMPs. In the event that the City finds a BMP in need of maintenance or repair, the City will notify the BMP owner of the necessary maintenance or repairs and give the landowner a timeframe for completing the maintenance or repairs. If the maintenance or repairs are not completed within the designated timeframe, the City shall perform the maintenance or repairs and bill the landowner for the actual costs for the work. Inspection & Maintenance Activities Refer to the checklist provided with this manual for operation, maintenance and inspection of BMP and storm water infrastructure. The checklist is for the use of the BMP owner in performing routine inspections. The City will perform annual inspections of BMPs, using similar checklist. The BMP owner must maintain and update the BMP operations and maintenance plan. At a minimum, the operations and maintenance plan must include, but is not limited to: 1. Visual inspect and removal of debris from inlet, outlet, and sump structures 2. Removal of woody vegetation from the embankments BMP owners must routinely inspect BMPs to verify that all BMP components are functioning as designed and are not in danger of failing. All BMPs need maintenance to function as water quality and quantity enhancements. Maintenance can range from dredging sediment out of the treatment area to mowing grass. The BMP owner agrees to the maintenance and inspection programs attached with this manual. Inspections must be documented on the inspection forms included in this Operation and Maintenance Manual. A self-monitoring program by the project site owner is required during construction and during a maintenance schedule of any project described. A trained individual employed or retained by the project site owner shall prepare and maintain a written evaluation of the project site by the end of the next business day following each measurable Inspection. Inspection during construction should be after a storm event and at a minimum, one (1) time a week. Inspection during the maintenance schedule must routinely inspect all storm water infrastructure to verify that all components are functioning as designed and are not in danger of failing. They should be inspected a minimum of an annual basis or upon observed failure. Owner Acknowledgment This Operation and Maintenance Manual is submitted to the City of Carmel with the intent to ensure the longevity and adequate functioning of the BMP Permeable Paver System, Nyloplast Envirohood Structure and Dry Detention Basin with Native Plantings owned by Carmel Clay Parks and Recreation. By submitting this Operation and Maintenance Manual to the City of Carmel’s Office with plans to maintain a BMP Permeable Paver System, Nyloplast Envirohood Structure and Dry Detention Basin with Native Plantings the BMP owner noted above agrees to follow and abide by the inspection schedule and maintenance activities listed in this manual. The BMP owner noted above is responsible for any additional maintenance and/or repair activities to maintain the function and longevity of the BMP(s). _______________________________ ______________________________ Owner Signature: Date _______________________________ Printed STATE OF INDIANA ) ) SS: COUNTY OF ) BEFORE ME, the undersigned, a Notary Public in and for said County and State, personally appeared Owners,/Agent, subscribed and sworn before me this day of , . County of Residence Signature Commission Expiration Date Printed Name Wetland and Prairie Grass Maintenance Plan Short –term: Year 1 1. The wetlands and prairie grass (native plantings) should be monitored weekly for the first three months, and additional watering may be required to ensure the wetland plantings receive at least 1 inch of rainfall or watering. No additional watering is necessary if the soil is wet at the surface. 2. Monitor wetlands and prairie grass (native plantings) for growth of species not in the planting plan (invasive species). Eliminate invasive plants at the soonest possible time. Hand weeding and pruning is the preferred method for removing invasive plants. Spot applications of appropriate herbicides may also be utilized. Determination of herbicide use and application should only be completed by certified professional applicators. All manufacturers’ recommendations must be followed. 3. Assure that wetlands and prairie grass (native plantings) or pond hydrology is maintained. If it is not possible to maintain the hydrology of the planned wetlands and prairie grass watering the plants may be necessary, or the re-establishment of plants may be necessary when the hydrology is restored. 4. Mowing no shorter than 8” should be completed prior to the maturation of weed seed, typically in late spring, mid-summer, and early fall. Do not mow in wet or muddy locations. 5. Remove sediment that has filled the sediment forebay or is inhibiting plant growth. Some plant and/or mulch maintenance will likely be necessary with sediment removal. 6. Complete the first annual inspection of wetlands and prairie grass condition during the fall to assess vegetation establishment. Replace dead plants if necessary. Mid- and Long-Term: Year 2 and Beyond During the second and succeeding years, more of the planned plant species will be more noticeable and vigorous in their growth. Monitoring of the plantings during this period should be twice per year at a minimum. 1. If dead vegetation accumulates and causes ponding in new areas, removal of the dead material and any sediment may be necessary. During this time, planting new vegetation may be necessary. 2. Monitor wetlands and prairie grass (native plantings) for growth of invasive species. Eliminate invasive plants at the soonest possible time. LOCATION MAP – NO SCALE DENOTES PROJECT LOCATION National Flood Hazard Layer FIRMette 0 500 1,000 1,500 2,000250 Feet Ü SEE FIS REPORT FOR DETAILED LEGEND AND INDEX MAP FOR FIRM PANEL LAYOUT SPECIAL FLOOD HAZARD AREAS Without Base Flood Elevation (BFE) Zone A, V, A99 With BFE or DepthZone AE, AO, AH, VE, AR Regulatory Floodway 0.2% Annual Chance Flood Hazard, Areas of 1% annual chance flood with average depth less than one foot or with drainage areas of less than one square mileZone X Future Conditions 1% Annual Chance Flood HazardZone X Area with Reduced Flood Risk due to Levee. See Notes.Zone X Area with Flood Risk due to LeveeZone D NO SCREEN Area of Minimal Flood Hazard Zone X Area of Undetermined Flood HazardZone D Channel, Culvert, or Storm Sewer Levee, Dike, or Floodwall Cross Sections with 1% Annual Chance 17.5 Water Surface Elevation Coastal Transect Coastal Transect Baseline Profile Baseline Hydrographic Feature Base Flood Elevation Line (BFE) Effective LOMRs Limit of Study Jurisdiction Boundary Digital Data Available No Digital Data Available Unmapped This map complies with FEMA's standards for the use of digital flood maps if it is not void as described below. The basemap shown complies with FEMA's basemap accuracy standards The flood hazard information is derived directly from the authoritative NFHL web services provided by FEMA. This map was exported on 2/24/2021 at 5:03 PM and does not reflect changes or amendments subsequent to this date and time. The NFHL and effective information may change or become superseded by new data over time. This map image is void if the one or more of the following map elements do not appear: basemap imagery, flood zone labels, legend, scale bar, map creation date, community identifiers, FIRM panel number, and FIRM effective date. Map images for unmapped and unmodernized areas cannot be used for regulatory purposes. Legend OTHER AREAS OF FLOOD HAZARD OTHER AREAS GENERAL STRUCTURES OTHER FEATURES MAP PANELS 8 B 20.2 The pin displayed on the map is an approximate point selected by the user and does not represent an authoritative property location. 1:6,000 86°4'6"W 39°59'1"N 86°3'28"W 39°58'33"N Basemap: USGS National Map: Orthoimagery: Data refreshed October, 2020 W WEEEEEEEEEC C G G E EOHU OHU OHU OHU OHU OHU OHU OHUN00°09'42"W 761.17'S89°59'52"W 775.74'N41°05'18"E 174.60'SPEARS SPEARS SPEARS SPEARS SPEARS SPEARS SPEARS SPEARS SPEARS SPEARS SPEARS SPEARS SPEARSSPEARSSPEARS SPEARSSPEARS SPEARS SPEARS SPEARS SPEARS SPEARS SPEARS PROPOSED WATERSHED 1 E. MAIN STREET EXISTING DETENTION BASIN PROPOSED WATERSHED 2 EXISTING WATERSHED AREA EXISTING WATERSHED AREA EXISTING WATERSHED AREA OUTSIDE OF PROJECT AREA OUTSIDE OF PROJECT AREA AREA OUTSIDE OF PROJECT AREA POND DRY DETENTION BASIN WITH NATIVE PLANTINGS NYLOPLAST STRUCTURE WITH ENVIROHOOD BMP PERMEABLE PAVERS PERMEABLE PAVERS NATIVE PLANTING PROTECTION SIGNAGE (SEE C302) NATIVE PLANTING PROTECTION SIGNAGE (SEE C302) NATIVE PLANTING PROTECTION SIGNAGE (SEE C302) ENGINEERS 317 | 846 - 6611 800 | 452 - 6408 317 | 843 - 0546 fax W E I HE Land Surveying | Civil Engineering Landscape Architecture ALLAN H. WEIHE, P.E., L.S. - FOUNDER 10505 N. College Avenue Indianapolis, Indiana 46280 weihe.net LAWRENCE W. INLOW PARK PHASE II IMPROVEMENTS FIGURE 3 - WATERSHED SUMMARY MAP W S N E BMP AND ACCESS EASEMENT ENGINEERS 317 | 846 - 6611 800 | 452 - 6408 317 | 843 - 0546 fax W E I H E Land Surveying | Civil Engineering Landscape Architecture ALLAN H. WEIHE, P.E., L.S. - FOUNDER 10505 N. College Avenue Indianapolis, Indiana 46280 weihe.net LAWRENCE W. INLOW PARK PHASE II IMPROVEMENTS PROJECT DETAILS OUTLET CONTROL STRUCTURE 101 (NO SCALE) 1 C300 2'x2' PRECAST CONCRETE STRUCTURE NEENAH R-3402-E, OR APPROVED EQUALPROPOSED GRADING POND BOTTOM CONTRACTOR SHALL CONNECT POND SUBDRAIN TO STRUCTURE. 6"(h) x 12"(w) ORIFICE HOLE ELEV.=751.74 ELEV.=750.91 ELEV.=754.00 2'x2' PRECAST CONCRETE STRUCTURE 6"(h) x 12"(w) ORIFICE HOLE 14 C800 UNILOCK PERMEABLE PAVER (NO SCALE) 12" HDPE OUTLET PIPE @ 1.25% w/ CHECKMATE INLINE CHECK VALVE 12" HDPE OUTLET PIPE @ 1.25% w/ CHECKMATE INLINE CHECK VALVE 12" PERFORATED HDPE DRAINAGE PIPE. ELEVATION VARIES PER PLAN C300. (MIN. 1FT COVER). PROVIDE 6" MIN. PERMEABLE SUBBASE AROUND PIPE AND GRADE SUBGRADE TO DRAIN. PERMEABLE JOINT OPENING AGGREGATE: OPEN-GRADED, CRUSHED, WASHED ANGULAR STONE; ASTM NO. 8 OR 1 8 TO 3 16 INCH GRANITE CHIP (2-5 MM) UNILOCK PERMEABLE PAVERS 1 1 2" PERMEABLE SETTING BED AGGREGATE: OPEN-GRADED, CRUSHED, WASHED ANGULAR STONE; INDOT NO. 11 / ASTM NO. 8 6" MIN. PERMEABLE BASE AGGREGATE: OPEN-GRADED, CRUSHED, WASHED ANGULAR STONE; INDOT NO. 53 / ASTM NO. 57 16" MIN. PERMEABLE SUBBASE AGGREGATE: OPEN-GRADED, CRUSHED, WASHED ANGULAR STONE; INDOT NO. 4 / ASTM NO. 2 ***BOTTOM OF RESERVOIR TO BE LEVEL*** GEOTEXTILE MATERIAL; MIRAFI 160N, OR APPROVED EQUAL. INSTALL ON BOTTOM AND SIDES WITH A MINIMUM OVERLAP OF 12" BETWEEN ADJOINING ROLLS. SUBGRADE MATERIAL: MIN. CBR - 5% (COMPACT IF LESS THAN 5%) SLOPE TO DRAIN US 100NW FILTER FABRIC 20'-0"16"6"***ALL STONE AGGREGATE TO BE INSTALLED AND COMPACTED IN 2" LIFTS***28" ENGINEERS 317 | 846 - 6611 800 | 452 - 6408 317 | 843 - 0546 fax W E I HE Land Surveying | Civil Engineering Landscape Architecture ALLAN H. WEIHE, P.E., L.S. - FOUNDER 10505 N. College Avenue Indianapolis, Indiana 46280 weihe.net LAWRENCE W. INLOW PARK PHASE II IMPROVEMENTS PROJECT DETAILS 3:1 SL O P E 3:1 S L O P E POND CROSS SECTION (NO SCALE) GRADE AS SHOWN ON PLANS MAINTENANCE _ INSPECT WITHIN 24 HOURS OF EACH RAIN EVENT AND AT LEAST ONCE EVERY SEVEN CALENDAR DAYS. _ CHECK CHANNEL OUTLET AND ROAD CROSSINGS FOR BLOCKAGE, SEDIMENT, BANK INSTABILITY, AND PIPING OR SCOUR HOLES; REMOVE ANY BLOCKAGE, AND MAKE REPAIRS IMMEDIATELY. _ REMOVE SIGNIFICANT SEDIMENT AND DEBRIS FROM CHANNEL TO MAINTAIN DESIGN CROSS SECTION AND CHANNEL GRADE AND TO PREVENT SPOT EROSION. 6" PERFORATED UNDERDRAIN. INVERT 10" BELOW DRY BASIN SURFACE. SURROUNDED BY #53 STONE. WRAP WITH GEOTEXTILE FABRIC. REFER TO PLANS FOR MORE INFORMATION. SUBGRADE SLOPE VARIES SLOPE VARIES 755.50756.00 756.00 18" DEEP RIPRAP (1/3 CU. FT. MIN. SIZE) 3:1 S L O P E EMERGENCY OVERFLOW 100 YEAR ELEV.=755.05 3:1 SL O P E EMERGENCY SPILLWAY (NO SCALE) NATIVE VEGETATION PROTECTION SIGNAGE ENGINEERS 317 | 846 - 6611 800 | 452 - 6408 317 | 843 - 0546 fax W E I HE Land Surveying | Civil Engineering Landscape Architecture ALLAN H. WEIHE, P.E., L.S. - FOUNDER 10505 N. College Avenue Indianapolis, Indiana 46280 weihe.net LAWRENCE W. INLOW PARK PHASE II IMPROVEMENTS PROJECT DETAILS 4 C306 MONITORING WELL (NO SCALE) PERMEABLE AGGREGATE RESERVOIR PERFORATED HDPE STORM SEWER MONITORING WELL WITH REMOVABLE CAP 4"MIN. PERFORATED PVC PIPE GRADE Detention Basin Mix Latin Name Common Name  PLS oz/acre Height Bloom Season Bloom Color  Grasses and Sedges Carex frankii Frank's Sedge 3 1' June‐July green Carex cristatella Crested Sedge 1 2' June‐July green Carex hystericina Porcupine Sedge 2 2' June‐July green Carex granularis Meadow Sedge 2 1' May‐June green Carex vulpinoidea Fox Sedge 4 2' June‐July brown Elymus riparius Riverbank Wild Rye 10 3' July‐Aug green Elymus virginicus Virginia Wild Rye 64 3' July‐Aug green Glyceria striata Fowl Manna Grass 2 3' May‐June green Leersia oryzoides  Rice Cut Grass 2 3' Aug‐Sept green Panicum virgatum Switchgrass 2 5' July‐Aug brown Scirpus atrovirens Dark Green Bulrush 2 5' June‐July brown Spartina pectinata Prairie Cordgrass 2 5' Aug‐Sept green Total oz 96 Forbs Alisma subcordatum Water Plantian 0.5 1' July‐Aug White  Asclepias incarnata Swamp Milkweed 2 3' July‐Aug Pink Boltonia latisquama False Aster 2 4' Aug‐Sept White  Eupatorium perfoliatum Boneset 1 3' Aug‐Sept White  Eutrochium maculatum Spotted Joe‐Pye Weed 2 5' Aug‐Sept Pink  Helenium autumnale Autumn Sneezeweed 2.5 4' Aug‐Sept Yellow  Hibiscus moscheutos Swamp Rose Mallow 2 5' July‐Aug Pink Liatris spicata Dense Blazing Star 2 5' July‐Aug Purple  Lobelia cardinalis Cardinal Flower 0.5 3' Aug‐Sept Red  Lobelia siphlitica Great Blue Lobelia 0.5 2' Aug‐Sept Blue  Lycopus americanus Water Horehound 0.5 2' July‐Aug White  Mimulus ringens Monkeyflower 1 3' Aug‐Sept Lavender  Oligoneuron riddellii Riddell's Goldenrod 1 3' Sept‐Oct Yellow  Penstemon digitalis Foxglove Penstemon 1 2' May‐June White  Physostegia virginiana Obedient Plant 1 3' Aug‐Sept Pink Pycnanthemum virginianum Mountain Mint 1 2' July‐Aug White  Rudbeckia hirta Black‐Eyed Susan 3 2' June‐July Yellow  Rudbeckia subtomentosa Sweet Black‐eyed Susan 3 4' July‐Sept Yellow  Senna hebecarpa Wild Senna 2 4' July‐Aug Yellow  Silphium perfoliatum Cupplant 2 5' July‐Aug Yellow  Silphium terebinthinaceum Prairie Dock 3 6' July‐Sept Yellow  Solidago gigantea Late Goldenrod 1 4' Aug‐Sept Yellow  Symphyotrichum novae‐angliae New England Aster 1 4' Sept‐Oct Purple  Symphyotrichum lanceolatum Panicled Aster 0.5 3' Sept‐Oct White  Verbena hastata Blue Vervain 2 5' July‐Aug Blue  Vernonia fasciculata Smooth Ironweed 2 4' Aug‐Sept Purple  Zizia aurea Golden Alexanders 2 2' May Yellow  Total oz 42 Maintenance Inspection Checklist Page 3 of 9 DRY POND & WET POND MAINTENANCE INSPECTION CHECKLIST BMP Location: Inspector’s Remarks: Overall Condition (circle one): ACCEPTABLE UNACCEPTABLE Inspection Date: FREQUENCY MAINTENANCE ACTIVITY COMMENTS As Needed & Following > 1” Rainfall Irrigate if plants appear wilted or unhealthy; replace dead plants Check/repair areas with erosion, cracking, embankment failure, burrowing animals, and sediment clogging the drain and other pipes Repair erosion and bare soil Remove woody vegetation < 15’ toe of embankment and mow < 25’ from spillway Remove trash, debris, and sediment Remove weeds and invasive plants Monthly (during growing season) Irrigate 1” water/week during the first growing season; maintain low water levels to allow sufficient oxygen to the roots of establishing plants (wet pond shelf) Check/clean inlets, outlets/overflows and trash racks from debris Check plants for pest damage or disease Remove trash, debris, and sediment Semi-Annually (spring & fall) Check/remove sediment build-up and plant debris (especially < 18” of outlet) Check water levels with design specifications (wet pond) Check/repair any settlement of berms Check/remove burrowing animals; repair holes in embankments Annually Seed or sod to restore dead or dying grass/groundcover Replace mulch every 3 years (min); replace topsoil every 10 years (min) Remove accumulated sediment (> 50% capacity forebay, > 25% capacity pond). Minimum 2- 10 years (dry pond), 5-10 years (wet pond) Upon Failure Redesign and reconstruct Maintenance Inspection Checklist Page 9 of 9 RIPARIAN RESTORATION & NATIVE REVEGETATION MAINTENANCE INSPECTION CHECKLIST BMP Location: Inspector’s Remarks: Overall Condition (circle one): ACCEPTABLE UNACCEPTABLE Inspection Date: FREQUENCY MAINTENANCE ACTIVITY COMMENTS As Needed & Following > 1” Rainfall Irrigate if plants appear wilted or unhealthy; replace dead plants Check for erosion and slope stability; repair with additional plant material similar to original and/or small stones for stability Remove trash, debris, and sediment Remove weeds and invasive plants Replace bark mulch on bare, exposed soil Monthly (during growing season) Irrigate 1” water/week during the first growing season Check plants for pest damage or disease Remove trash, debris, and sediment Remove weeds and invasive plants Semi-Annually (spring & fall) Check for erosion, embankment failure, and sediment accumulation Prune/trim plants Redefine landward edge Add bark mulch Annually Prescribed burn (prairie only) end of second year OR mow to very close to ground; remove plant debris from site to expose soil to sun; repeat on 2 to 5 year cycle Upon Failure Redesign and reconstruct PERMEABLE PAVER MAINTENANCE GUIDE This guide is specific to Unilock® permeable pavers as a maintainable system for stormwater runoff and does not cover cleaning concrete pavers themselves. Please see the Unilock Paver Miantenance for Commercial Installations (available for download at www.unilock.com) for information on cleaning concrete pavers. The maintenance information in this guide is intended for Unilock permeable paver systems only and not for other types of permeable pavers or pervious systems. Maintenance is necessary for any type of permeable pavement system, much like any impervious pavement with catch basins and underground infrastructure. Over the lifetime of the permeable paver system, there will be a need to clean any sediment, soil, dirt and debris from the joint aggregate material to maintain a sufficient infiltration rate. Every project will vary in performance needs, as well as to the frequency in which the joint material must be cleaned. The surface infiltration rate must be greater than the regional 100-year rainfall intensity to adequately ensure no runoff is generated, which is only one goal for using permeable pavers. Unilock suggests establishing a maintenance plan using the techniques in this document to prevent clogging. PERMEABLE PAVER MAINTENANCE GUIDE 4 | PRECEDING MAINTENANCE 5 | EXAMPLES OF COMMON MAINTENANCE ISSUES 6 | MAINTENANCE TYPES & EQUIPMENT 9 | STRATEGIC PROCEDURES FOR MAINTAINING INFILTRATION 10 | RECOMMENDED SEASONAL MAINTENANCE SCHEDULE 11 | WINTER MAINTENANCE AND DE-ICING 4 | PRECEDING MAINTENANCE Before providing maintenance on permeable paver systems, proper installation and protection during construction is required. Here are a few conditions to observe, require and prevent for establishing a successful system: 1. Verify correct installation and materials • Hire contractors with knowledgeable experience installing permeable pavers • Review and approve all sub-base, base and joint aggregate materials • Do not allow sand and dense-graded aggregates 2. Prevent construction damage • Limit sub-grade soil compaction when infiltration is necessary • Restrict vehicles with muddy tires from driving over newly placed pavers • Do not mix aggregate materials 3. Refill joint material • Once, between 3 and 6 months after initial installation • Repeat as needed - approximately every 5-10 years 4. Avoid stockpiling of materials such as • Topsoil • Mulch The proper materials and installation execution can be found in the Unilock specifications for permeable pavers. Both residential and commercial projects will utilize the same base, setting bed and joint aggregates. Some projects may not require sub-base materials, under drainage or geotextile. It is not necessary to separate the setting bed from the base aggregates with a geotextile. EXAMPLES OF COMMON MAINTENANCE ISSUES Below are several warning signs and visual clues of common maintenance issues which must be prevented and addressed or remediated to ensure continued surface infiltration. These common problems can often be easily remedied by maintaining the proper joint aggregate level. | 5 2. PONDING AND BIRD BATHS • Rule of thumb: if more than a nickel deep one minute after a rainfall event, maintenance is necessary • Verify correct materials were installed • Exceptions at bottom of slopes 3. SURFACE CRUSTING • Identify if there is a problem such as run-on sediments • Increase cleaning frequency in troubled areas • Remove debris immediately 4. WEEDS • Weeds will not germinate unless there is a collection of soil or moisture • Remove weeds immediately • Clean sediment from joint material • Chemical treatment may be required prior to maintenance removal 5. COVERED JOINT MATERIAL • Identify problem and correct • Remove immediately • Joint material should appear topped up as photo on left 1. SLOW DRAINING/RUNOFF • Verify with simple infiltration testing or observe after rain storms • Surface should drain immediately 6 | MAINTENANCE TYPES There are two service types for maintaining the integrity of a permeable paver system: 1. Preventative – removes most miscellaneous debris before being trapped in the joint aggregate material causing clogging. This usually does not require removal of any joint material to restore infiltration. 2. Restorative – requires some removal or complete removal of the joint material to renew infiltration. Occurs after miscellaneous debris has been captured and lodged in the joint aggregate. Note: Both maintenance types will be most effective when the joint aggregate material is filled to the “lip” of the paver. If the joint material has settled more than the joint width, plus 1/8 inch below the paver lip, the maintenance equipment is significantly less effective and potentially more expensive. MAINTENANCE EQUIPMENT Maintenance equipment requirements will vary according to project size, age and product type. PROJECT TYPE 1: For smaller pedestrian type areas such as sidewalks, driveways, plazas, patios or similar: PREVENTATIVE 1. HAND-HELD BRISTLE BROOM • Available at any hardware store • Sweep as needed to keep the surface clear of debris • Approximate cost: $15 | 7 RESTORATIVE 2. LEAF BLOWER • Electric or gas powered • Minimum air speed of 120 mph • Joint aggregate material will remain in place while removing debris from paver surface • Approximate cost: $50 to $300 3. ROTARY BRUSH • Poly bristles only • Flips debris from joint • Will require slight refilling of the joint aggregate material • Approximate cost: varies depending on attachment vehicle 1. WET/DRY SHOP VACUUM • Minimum 4 HP (peak) motor with 130 cubic feet per minute suction • Will remove some joint aggregate material • Replenish removed joint aggregate material to “lip” of paver • Approximate cost: $50 to $150 2. RIDING LITTER VACUUM • Tennant ATLV 4300 • 48 inch wide vacuum head • 110 gallon capacity • Can also be used as a preventative technique • Will evacuate most debris from joint except for aggregate material • Approximate cost: $25K new 3. POWER WASHER • Capable of spraying 1,400 to 1,800 psi • Spray at a 30 degree angle approximately 18 to 24 inches from the surface • Will evacuate joint material • Use a strong vaccuum to clean up all dislodged debris to eliminate resettling • Replenish removed joint aggregate material to “lip” of paver • Approximate cost: $125 to $500 PROJECT TYPE 2: Among the considerations for your heavy-duty permeable projects Unilock now offers products designed for easier cleaning. Dura-Flow™ Rapid Clean™ has specially designed joints for easier cleaning and maintenance. Ask your Unilock Representative for more information. Maintenance for larger vehicular areas such as roads, parking lots, alleys, plazas or similar that can support vehicles: PREVENTATIVE 8 | Vacall™ Dynamic Multi-Purpose Vacuum Elgin® Whirlwind 1. ROTARY BRUSH • Poly bristles only • Flips debris from joint • Will require slight refilling of the joint aggregate material • Approximate cost: varies depending on attachment vehicle 2. BROOM SWEEPERS • Typical “street sweeper” type • Rotating curb brushes with center pickup • Poly bristles only • Do not utilize water to clean the surface as this can have detrimental effects on the cleaning • Approximate cost: $100 to $120 per hour from a service company 3. REGENERATIVE AIR SWEEPERS • Light duty suction cleaning • Utilizes stream of air blowing horizontally across surface and vacuuming • No rotating brushes • Approximate cost: $45 to $65 per hour from a service company 1. VACUUM SWEEPERS • Heavy duty cleaning • Minimum suction of 14,000 cubic feet per minute • Complete evacuation of joint aggregate material • Replenish removed joint aggregate material to “lip” of paver • Approximate cost: $2.50 to $4.50 per parking space RESTORATIVE | 9 STRATEGIC PROCEDURES FOR MAINTAINING INFILTRATION Observe and implement the following habitual procedures to ensure longevity of the system: 1. WEEKLY Prevent contamination from routine landscape maintenance such as grass clippings from mowing, hedge trimming, mulching plant beds, etc., by implementing the following joint-opening cleaning procedures immediately after contamination occurs: • Hand broom debris from the paver surface • Blow debris from the paver surface with backpack blower type device, collect and dispose • Mechanically sweep paver surface 2. MONTHLY Observe any collection areas of debris, dirt, topsoil, mulch, etc., after seasonal events such as snowfall, rain storms, leaf litter, etc., and investigate if clogging is occurring. Immediately restore infiltration using the following cleaning options: • Break up any crust covering the joint aggregate material with hand broom for smaller areas, or mechanically with a rotary sweeper for larger areas. Remove debris material. • When necessary, restore infiltration using wet/dry shop-vacuum for small areas or vacuum truck for larger areas by removing debris from joint aggregate material. • Replenish joint aggregate material to “lip” of paver 3. YEARLY Establish a seasonal maintenance schedule that includes the following: • Sweep entire permeable paving surface with appropriate preventative sweeping devices • Replenish joint aggregate material to “lip” of paver 4. TEN YEARS PLUS Plan long-term maintenance to rejuvenate infiltration rates: • Complete restoration of the joint aggregate material • Replenish joint with cleaned or new aggregate material to “lip” of paver 2. POWER WASHERS • Capable of spraying 1,400 to 1,800 psi • Spray at a 30 degree angle approximately 18 to 24 inches from the surface • Will evacuate joint aggregate material • Use a strong vaccuum to clean up all dislodged debris to eliminate resettling • Replenish removed joint aggregate material to “lip” of paver 10 | RECOMMENDED SEASONAL MAINTENANCE SCHEDULE Unilock® suggests establishing a best practices maintenance program to ensure longevity of the systems before restorative action is required. Biannual preventative maintenance is suggested as shown in the schedule below. This includes sweeping once in the early spring and once again in the late fall. Below is a preventative maintenance timeline that includes four maintenance suggestions: 1. AFTER THE SNOW MELT – MARCH 1 THROUGH APRIL 15 • Broom, blow, rotary brush or sweep entire surface • Clean debris from paver surface in location of snow stockpile area • Replenish joint aggregate material after cleaning • Every fifth year, vacuum or power wash problem areas and refill joint material 2. LATE SPRING – APRIL 1 THROUGH MAY 15 • Broom, blow, rotary brush or sweep flowers from trees and shrubs • Collect any additional debris from areas mulched or planted with annual flowers • Replenish joint aggregate material as necessary 3. LATE SUMMER – JULY 15 THROUGH AUGUST 30 • Broom, blow, rotary brush or sweep lawn and shrub clippings or tree fruits • Collect any additional debris from summer activities such as charcoal coals inadvertently dumped on the permeable surface, beach sand, etc. • Replenish joint aggregate material as necessary 4. LATE FALL – OCTOBER 15 THROUGH NOVEMBER 30 • Broom, blow, rotary brush or sweep plant leaves • Replenish joint aggregate material as necessary Various factors will affect each project’s preventative maintenance timeline and must be reviewed individually. Recommended Seasonal Maintenance Schedule Chart | 11 WINTER MAINTENANCE AND DE-ICING DEALING WITH SNOW Equip plow scrapers and blades with shoes or high-density plastic blades to reduce the risk of damaging paver joints and the surface of the pavement. While scraping the surface without this protection will not compromise the structural integrity of Unilock pavers, it may affect the aesthetics of the surface by leaving behind rust marks and further damage the finish. In contrast, a rotational snow broom (non-metal) can be used to remove snow safely from the paver surface. DEALING WITH ICE Rock Salt - Sodium Chloride (NaCl) for temperatures as low as 20oF (-7oC) Calcium Chloride (CaCl2) only when necessary when temperatures are below 20oF (-7oC) to -2oF (-19oC) Follow the directions listed on the deicing product bag but use sparingly. Only apply the minimum amount necessary to melt the snow and ice. Over applying the product can still result in damage to concrete. Sweep and remove any excess deicing chemical after the ice and snow melts. After the winter season, thoroughly wash the paver surface to remove any excess deicing chemical remaining. DO NOT USE: • Magnesium Chloride (MgCl2) • Calcium Magnesium Acetate (CMA) • Potassium Chloride (KCl) • Potassium Acetate (KA) • Fertilizers containing Ammonium Nitrate and Ammonium Sulfate These chemicals rapidly attack and disintegrate concrete. Snow Broom for snow removal Over salted pavers BOSTON (508) 278-4536 BUFFALO (716) 822-6074 CHICAGO (630) 892-9191 CINCINNATI (513) 202-0219 CLEVELAND (330) 927-4000 DETROIT (248) 437-7037 KANSAS CITY (913) 417-7985 MID ATLANTIC (202) 798-2060 MILWAUKEE (262) 742-3890 NEW YORK (845) 278-6700 TORONTO (416) 646-9000 UNILOCK.COM | 1-800-UNILOCK ©2019 Hengestone Holdings, Inc. is the owner or authorized user of all trademarks used in this publication. Not all products shown are available at all Unilock locations. Log on to Unilock.com for availability. Site Name: Owner Name: Owner Address: Owner Phone Number: Emergency Phone Number: Location: Date: Time: Inspector: Change in ownership since last inspection? Maintenance Item Maintenance (1 or 2)* Maintenance is needed: Comments Trash or debris which is located immediately in front of the catch basin opening or is blocking inletting capacity of the basin by more than 10% Trash or debris (in the basin) that exceeds 60 percent of the sump depth as measured from 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 blocking more than 1/3 of its height. Dead animals or vegetation that could generate odors that could cause complaints or dangerous gases (e.g., methane). Sediment Sediment (in the basin) that exceeds 60 percent of the sump depth as measured from 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. Top slab has holes larger than 2 square inches or cracks wider than 1/4 inch (Intent is to make sure no material is running into basin). Frame not sitting flush on top slab, i.e., separation of more than 3/4 inch of the frame from the top slab. Frame not securely attached Maintenance person judges that structure is unsound. Grout fillet has separated or cracked wider than 1/2 inch and longer than 1 foot at the joint of any inlet/outlet pipe or any evidence of soil particles entering catch basin through cracks. Settlement/Misalignment If failure of basin has created a safety, function, or design problem. Vegetation growing across and blocking more than 10% of the basin opening. Vegetation growing in inlet/outlet pipe joints that is more than six inches tall and less than six inches apart. Contaminants and Pollution Any evidence of oil, gasoline, contaminants or other pollutants (Coordinate removal/cleanup with local water quality response agency). Cover is missing or only partially in place. Any open catch basin requires maintenance. Mechanism cannot be opened by one maintenance person with proper tools. Bolts into frame have less than 1/2 inch of thread. One maintenance person cannot remove lid after applying normal lifting pressure (Intent is to keep cover from sealing off access to maintenance). Ladder Ladder is unsafe due to missing rungs, not securely attached to basin wall, misalignment, rust, cracks, or sharp edges. Metal Grates Trash and debris that is blocking more than 20% of grate surface inletting capacity. *Maintenance: Enter 1 if maintenance is need and include WO#.  Enter 2 if maintenance was performed same day Inspection and Maintenance Checklist Catch Basins, Manholes, and Inlets Vegetation Catch Basin Cover Fractures or Cracks in Basin Walls/Bottom Structure Damage to Frame and/or Top Slab Trash & Debris Y OR N Site Name: Owner Name: Owner Address: Owner Phone Number: Emergency Phone Number: Location: Date: Time: Inspector: Change in ownership since last inspection? Maintenance Item Maintenance (1 or 2)* Maintenance is needed: Comments Sediment & Debris Accumulated sediment exceeds buildup 1/4" of the pipe diameter up to maximum of 6" Vegetation Vegetation that reduces free movement of water through the pipes Protective coating is damaged; rust is causing more than 50% deterioration to any part of the pipe Any dent that decreases the cross section area of pipe by more than 20% or puncture that impacts performance *Maintenance: Enter 1 if maintenance is need and include WO#.  Enter 2 if maintenance was performed same day. Inspection and Maintenance Checklist Y OR N Damaged Pipe Conveyance Stormwater Pipe Site Name: Owner Name: Owner Address: Owner Phone Number: Emergency Phone Number: Location: Date: Time: Inspector: Change in ownership since last inspection? Maintenance Item Maintenance (1 or 2)* Maintenance is needed: Comments Check for ponds covering more than 10 percent of the paved area remain present for more than one hour after a rainstorm. Vacuum/sweep permeable surface/joints of any debris that may be obstructing flow. Heavy duty vacuum sweeper to completely remove joint aggregate material. Replace permeable joint materials. If above methods do not restore infiltration rates, reconstruction or replacement of the surface and/or subsurface layers may be required. Check if pervious paving structure is cracked, broken, concrete spalling or raveling; missing paver blocks or grid. Repair or replace broken structural components as needed, per manufacturer’s instructions. Check for aggregate loss in permeable joint pavers. Replenish permeable joint material as specified by manufacturer or in design plans If Portions of the paved area are one inch (1”), or more, lower than the general surface of the pavement Remove pavers and bedding stone in the affected area. Level the exposed base course and compact. Replace bedding stone and reinstall pavers and jointing aggregate. If storm drain does not safely convey excess flows to storm drain, repair the overflow pipe or remove material clogging the overflow outlet, so that excess flow is conveyed efficiently to storm drain. Remove any debris or obstruction that is blocking the drain, including any material inside the drain. Check monitoring well between storm events to ensure drainage. Manually remove weeds. Do not use herbicides. Mow, torch, or, if vegetation is specified in joints, inoculate with preferred vegetation. Root systems of adjacent trees encroach on subsurface structural components or cause pavement lift Inspect for unvegetated or eroded areas adjacent to pavers. Repair erosion and re-establish vegetation. *Maintenance: Enter 1 if maintenance is need and include WO#. Enter 2 if maintenance was performed same day. Y OR N Inspection and Maintenance Checklist Permeable Pavers Drainage Structural Integrity Vegetation Outlet to Storm Drain Site Name: Owner Name: Owner Address: Owner Phone Number: Emergency Phone Number: Location: Date: Time: Inspector: Change in ownership since last inspection? Maintenance Item Maintenance (1 or 2)* Maintenance is needed: Comments Trash or debris which is located immediately in front of the catch basin opening or is blocking inletting capacity of the basin by more than 10% Trash or debris (in the basin) that exceeds 60 percent of the sump depth as measured from 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 blocking more than 1/3 of its height. Floating debris in excess of 6". Dead animals or vegetation that could generate odors that could cause complaints or dangerous gases (e.g., methane). Sediment Sediment (in the basin) that exceeds 60 percent of the sump depth as measured from 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. Top slab has holes larger than 2 square inches or cracks wider than 1/4 inch (Intent is to make sure no material is running into basin). Frame not sitting flush on top slab, i.e., separation of more than 3/4 inch of the frame from the top slab. Frame not securely attached Maintenance person judges that structure is unsound. Cracks with visible debris intrusion. Settlement/Misalignment If failure of basin has created a safety, function, or design problem. Vegetation growing across and blocking more than 10% of the basin opening. Vegetation growing in inlet/outlet pipe joints that is more than six inches tall and less than six inches apart. Contaminants and Pollution Any evidence of oil, gasoline, contaminants or other pollutants (Coordinate removal/cleanup with local water quality response agency). Cover is missing or only partially in place. Any open catch basin requires maintenance. Mechanism cannot be opened by one maintenance person with proper tools. Bolts into frame have less than 1/2 inch of thread. One maintenance person cannot remove lid after applying normal lifting pressure (Intent is to keep cover from sealing off access to maintenance). Metal Grates Trash and debris that is blocking more than 20% of grate surface inletting capacity. *Maintenance: Enter 1 if maintenance is need and include WO#. Enter 2 if maintenance was performed same day. Catch Basin Cover Trash & Debris Structure Damage to Frame and/or Top Slab Fractures or Cracks in Basin Walls/Bottom Vegetation Y OR N Inspection and Maintenance Checklist Nyloplast Envirohood Structure