City in ILA to fix stormwater drainage issues | City brief
The city is working with the Mukilteo Water and Wastewater District to fix drainage issues near the access road to a wastewater treatment plant.
Mukilteo City Council authorized Mayor Jennifer Gregerson on Jan. 6 to sign an interlocal agreement with the water district to make drainage system improvements and to add $15,000 to the project’s budget.
Extreme rainfall on Aug. 29 overwhelmed Mukilteo’s stormwater system, causing flooding and mudslides throughout the city.
The storm filled catch basins, plugging pipes, washing out culverts and overflowing on to the streets.
One culvert across the access road to the Big Gulch Water Treatment Plant was also “blown out” and needed to be repaired, according to staff.
In 2013, the council approved emergency repairs to fix the access road and improve drainage there for $170,000, paid for out of the city’s Emergency Fund.
The ILA calls for the water district and a consultant to provide the design and construction management of the project for $30,000. The lowest bid for this work, however, was nearly $75,000.
As an insurance, staff asked that the council authorize the city to add another $15,000 to the budget.
The project will pipe stormwater away from the culvert near the wastewater treatment plant.
The water district had originally planned to install a 6-inch pipe to do this, but to accommodate the city’s project, will upgrade to a 24-inch pipe, staff said.