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City awards $661,047 cured-in-place sewer rehab contract; 33-inch line work to require temporary bypasses and neighbor outreach
Summary
Council approved a $661,047 contract with DVM Utilities for the cured-in-place pipe (CIPP) sewer rehabilitation program. Staff warned work on a 33-inch transmission sewer running in backyard easements will be more disruptive and requires bypass pumping and neighborhood outreach.
The Ferndale City Council approved a $661,047 contract with DVM Utilities Inc. for this year's cured-in-place pipe (CIPP) sewer rehabilitation program, a multi-segment project that includes a larger 33-inch transmission sewer that will require bypass pumping and added neighborhood communication.
Public Works staff said the city maintains about 81.8 linear miles of sewer, of which approximately 27.4 miles (33 percent) have been replaced since 1991. The CIPP program runs on a four-year cycle: a year of CCTV and cleaning followed by up to three years of repairs that use a cured-in-place liner to rehabilitate mains without full excavation.
Staff explained the 33-inch sewer segment runs in backyard easements between Woodward and Bermuda and carries transmission flow; work there will require bypass pumping to maintain service during installation. The contractor will sequence three segments, starting in an unimproved alley (segment 1) to improve access before moving to the backyard manhole segments. Staff said each segment should take three days total: one day for segment 1 and one to two days for segments 2 and 3, but emphasized rain and combined sewer flows can extend the schedule.
Because residents served by mains undergoing CIPP cannot use sanitary connections during the liner installation, staff said they will hold a public on-site meeting two weeks before construction, perform door-knocking one week before, and provide 48- and 24-hour notices and door hangers.
Council asked whether staff had checked references after a single negative reference was flagged in bid checks; staff replied they had performed a supplementary review with the city engineer and required vendor responses about materials and process for the 33-inch segment. The low bid was about $661,047, under the engineer's estimate of $835,000.
A construction schedule presented by staff shows a preconstruction meeting April 15, cleaning and televising beginning April 30, phase 1 completion in early July, phase 2 starting July 15, construction substantially complete by Sept. 30 and punch-list finish by Oct. 30, subject to weather and flow conditions.
Council approved the contract by roll call vote.
