Natural drainage prevents polluted runoff from harming the fish and other wildlife that call Longfellow Creek home.
Seattle Public Utilities (SPU) is responsible for managing stormwater throughout the city and right now is working in the Delridge neighborhood.
- Fix It First—retrofit existing storage tanks to control up to 100 percent of the total volume.
- Keep the Stormwater Out—add Green Stormwater Infrastructure (GSI), such as natural drainage, to protect Longfellow Creek from polluted runoff.
- Store What’s Left—if the retrofit and GSI projects are as successful as expected, a new storage tank would not be needed.
SPU will replace the existing, passively controlled systems at two combined sewer facilities in Delridge, CSO 2 and CSO 3, to better monitor and control the amount of flow that is allowed to enter the downstream sewer system. These improvements will reduce the frequency of Combined Sewer Overflows (CSOs) into Longfellow Creek and reduce the frequency and costs associated with maintenance of these structures. In addition, the improvements will include at both facilities a permanent public art installation commissioned through the City of Seattle
Project design work is underway and expected to be complete in the first half of 2014. Construction is anticipated for the second half of 2014 and is scheduled to take approximately seven months to complete.
Stay tuned for more information on final project design and what to expect during construction in early 2014.
The Washington State Environmental Policy Act (SEPA) Checklist and Determination of Non-Significance were published on September 16, 2013: