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Appendix A
120 South 6th Street
Operations And Maintenance Plan
11/21/2024
This document summarizes the requirements for maintenance on the stormwater system at 120
South 6th Street. 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 Linear 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.