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HomeMy WebLinkAbout025_Storm O-MWarbler Condos TBD Catalyst Street Storm Water Facilities Operation & Maintenance Manual Overview The Cattail Creek Subdivision Owners Association is responsible for the maintaining of the existing regional storm pond. The onsite Owners Association is responsible for maintenance of all onsite storm water facilities. Such facilities include, but are not limited to, onsite swales, detention ponds, storm structures, storm piping, inlet controls, storm separators, and curb cuts per the schedule below. Maintenance Curb lines and curb cuts are to have sediment removed on a yearly basis, or on an updated maintenance schedule as determined by monitoring the sediment build-up, quarterly. Any removed sediment shall be removed from the site and disposed of properly, as to not discharge into state waters. Areas behind curb cuts shall be inspected regularly and kept free of obstructions from ice, vegetation, etc. The Hydrodynamic Separator is to be visually inspected every 6 months to check for build-up of sediment in the bottom of the structure. If sediment depth exceeds 75% of the sump depth, or 18 inches deep, the sediment shall be removed using a vac truck and disposed of at a proper disposal site. The sediment depth can also be measured from the top of the structure. If the sediment is measured to be 6 feet or less below the rim elevation, sediment shall be removed. Floatables (trash) are to be netted out and disposed of prior to removing sediment with a vac truck. Any oils or hydrocarbons are to be removed using absorbent pads prior to vacuuming out the sediment. Reference the Contech CDS Inspection and Maintenance Guide for additional details. The onsite detention pond and storm water swales shall be monitored every five years for sediment build-up. When sediment build-up raises the bottom of the pond to 1.5” above design elevation, sediment shall be removed mechanically and hauled off-site. If sediment extraction causes removal of vegetation from the bottom of the pond, the area shall be reseeded or re-sodded and appropriate storm water BMPs are to be installed until vegetation stabilization. The sump of the onsite curb inlet shall be inspected yearly. Sediment removal shall occur when sediment build-up reaches 2” below the outlet pipe. The 8” PVC storm pipe shall be flushed if more than 1” of sediment is visible in the bottom of the pipe. Annual inspection of the 8” pond outlet pipe shall occur to ensure the controlled release end cap and grated tee remain free of sediment. Budget It is estimated that the yearly budget to complete the above items is approximately $1,000 in 2022 value. This amount includes some contingency to rollover into a fund to allow for larger scale maintenance in future years, if necessary.