HomeMy WebLinkAbout18_Stormwater Maintenance PlanSTORMWATER SYSTEM MAINTENANCE
West Babcock Apartments
The stormwater system shall be maintained on a regular basis to ensure the long-term
functioning of the subsurface infiltration facilities, curb and gutter, and outlet structures as
designed. The storm system maintenance will be the responsibility of the property owner. The
infiltration facilities must be inspected after every storm event to ensure that they are draining
properly. The inlet and outlet structures must be inspected annually after spring runoff.
Pretreatment inlets will need to be vacuumed out when approximately 9” of sediment collects in
the bottom.
CMP detention systems should be cleaned when an inspection reveals accumulated sediment
and/or trash is clogging the outlet.
Accumulated sediment and trash can typically be evacuated through the manhole over the
outlet. If maintenance is not performed as recommended, sediment and trash may accumulate
in front of the outlet. Manhole covers should be secured following cleaning activities. Contech
suggests that all systems be designed with an access/inspection manhole situated at or near
the inlet and the outlet. Should it be necessary to get inside the system to perform maintenance,
all appropriate precautions regarding confined space entry and OSHA regulations should be
followed.
Annual inspections are the best practice for all underground systems. During this inspection, if
evidence of salting/de-icing agents are observed within, it is best practice for the system to be
rinsed, including above the spring line soon after the spring thaw as part of the maintenance
program for the system.
Maintaining an underground detention or infiltration system is easiest when there is no flow
entering the system. For this reason, it is a good idea to schedule cleanings during dry weather.