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HomeMy WebLinkAboutSub Permit.617 W Bleeker St.0062-2019-BRES (41)Crystal River Civil LLC 970.510.5312 Page 1 of 2 Appendix A 617 West Bleeker Street Operations And Maintenance Plan 10/11/2023 This document summarizes the requirements for maintenance on the stormwater system at 617 West Bleeker. This is agreed upon by the Landowner and the City Of Aspen to ensure the stormwater system will be managed and maintained to ensure the system continues to function as originally designed. Drywell The drywell shall be inspected and maintained at least every three months to remove any sediment, contaminants, and debris that has settled in the drywell. At minimum, the inspection and maintenance of the drywell shall include the following steps: • Drywell shall be continuously inspected. At minimum, every three months and after every storm event greater than ½ inches. • Remove and dispose of any sediment, solids, debris, and any other waste. All material removed from drywell shall be disposed of at a fitting disposal site and shall meet/comply with all local, State, and Federal waste regulations/jurisdictions. • Regularly inspect the drywells functionality in respect to the time it takes for water to drain in the drywell to mee the maximum required infiltration time of 24 hours is not exceeded. When drain down times in the drywell are larger than 24 hours, the drywell shall be drained via pumping and the infiltrative area of the drywell shall be cleaned and all perforation in the drywell shall be thoroughly washed out. Due to the difficult access for a vacuum truck, the drywell will have to be cleaned utilizing sump pumps and/or suction pumps to remove debris. This water and debris must be collected and disposed of properly offsite. The drywell will have to be cleaned by hand to ensure adequate infiltration. If irregular drainage of the drywell continues as described above, the system may be required to be replaced. Inlets and Trench Drains Trench drains and other linear drains shall be inspected and maintained on a regular basis to prevent any clogging and debris from entering the storm system to provide correct functionality. Grates and the adjacent areas to the trench drain shall be kept clean and clear of any leaves, soil, and any other solid waste materials to prevent clogging or larger materials from entering in the storm system. Drain sumps and catch basins shall be inspected, at the very minimum, every three months and for each storm event that is greater than ½ inches in depth. All sediment shall be cleaned out or vacuumed from the drain and catch basin. All sediment shall be disposed of correctly, meeting local jurisdictional codes and requirements. Any damage to the grate and the surrounding concrete shall be repaired correctly to maintain functionality of the drain. The grate shall be replaced if excessive damage is present. Crystal River Civil LLC 970.510.5312 Page 2 of 2 Pervious Pavers Pervious pavers shall be inspected periodically to ensure long-term performance. The most frequent issue with pervious pavers is clogging due to organic matter and other sediments. Inspection of the pervious pavers shall be completed every three months and for any storm event that is greater than ½ inch of rainfall depth. If backup of the pervious pavers is occurring, regenerative air vacuum sweeping of the surface shall be completed. All removed aggregate during vacuuming shall be replaced with the same materials as initially installed. It is also recommended to minimize the use of salt for ice melting, as well as avoid soil and debris from collecting on the pervious paver surface. Routine sweeping of the pavement surface is recommended to remove debris and prevent it from entering the pervious paver void space within the aggregate. If consistent clogging of the pavers is occurring, the entire paver section shall be replaced as defined in the permitted civil plans to ensure functionality of the permeable system.