HomeMy WebLinkAboutFile Documents.855 Chatfield Rd.0072-2020-BRES (44)Operation and Maintenance
1.1 Inlets and Piping
The piping must be maintained periodically to ensure proper operation. Minimum inspection
and maintenance requirements include the following:
· During the first year draw down should be checked for every event exceeding 0.25” of
precipitation to ensure no significant backups are occurring.
· Piping systems and sumps should be checked during and after storms routinely.
· After the first year, the system should be cleaned out at least once a year and more if the
first-year inspection proves more maintenance is required.
· More frequent cleaning reduces the amount of debris entering the system and reduces the
need for more intense maintenance.
· Clean the inside of any perforated pipes with a pipe cleaner accessed through cleanouts.
This should be done yearly, or as necessary if the system is not infiltrating properly or if the
system has become contaminated.
· Ensure heat tape is functioning before colder months to prevent damage to piping.
If the storm system is not maintained properly, replacement of parts or of the entire system may
be necessary.
1.2 Trench Drains and Slot Drains
Trench drains must be regularly inspected and maintained to prevent clogging and debris from
travelling further into the system. Routinely keep drain grates and surrounding patios clean and
free of leaves, dirt, and other debris. This will prevent clogging and damage to the storm
infrastructure. Inspect drain sumps quarterly and after every storm exceeding 0.5 inches,
remove excess sediment and debris buildup from the catch basin. Inspect system for damage
to the concrete and the grate. Inspect all grouted seams and cracks. If cracks are smaller than
½”, record information and continue inspection regularly. If cracks are larger than ½”, regrout
and repair to prevent further damage. If grate is damaged, repair or replace as necessary.
1.3 Drywell
Drywells must be inspected and maintained quarterly to remove sediment and debris that has
washed into them. A maintenance plan shall be submitted to the City in the Drainage Report
describing the maintenance schedule that will be undertaken by the owners of the new residence
or building. Minimum inspection and maintenance requirements include the following:
· Inspect drywells at least four times a year and after every storm exceeding 0.5 inches.
· Dispose of sediment, debris/trash, and any other waste material removed from a drywell at
suitable disposal sites and in compliance with local, State, and Federal waste regulations.
Routinely evaluate the drain-down time of the drywell to ensure the maximum time of 24
hours is not being exceeded. If drain-down times are exceeding the maximum, drain the
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drywell via pumping and clean out the percolation area (the percolation barrel may be jetted
to remove sediment accumulated in perforations. If slow drainage persists, the system may
need to be replaced.
· If debris found in drywell, debris will have to be removed by hand from the upper chamber.
· Persons must be certified for ‘confined space operations’ before entering the drywell for
maintenance and be aware of the hazards involved with working in confined spaces.
Certification and proper training can be obtained through organizations like OSHA.
1.4 Pervious Paver Area
As per section 8.5.3.1 of the URMP, the following schedule will be undertaken by the owners of
the property to achieve long term performance of the BMP’s.
The perforated pipes should be cleaned and flushed yearly using the cleanouts on either end of
the pipe. Do not use soap or chemicals to clean the drain. Inspect annually during a storm event
to insure performance of drainage. If the drain has clogged outside of the drain pipe within the
gravel bed, further maintenance or replacement of the gravel bed may be required. To access the
gravel bed, the pavers can be lifted, where the sand, filter fabric, and gravel detention bed can be
repaired as necessary. The pavers can be maintained similar to the recommended pervious paver
table 8.8 above, following the schedule as per section 8.5.3.1 of the URMP.