SPU Proposes More Ballard Roadside Raingardens
Seattle Public Utilities (SPU) is proposing to try to once again to establish roadside raingardens to divert stormwater from Ballard’s combined sewer system. SPU has identified an area of Ballard that is thought to have sandy soil, rather than the glacial till/hard pan that prior roadside raingardens were sited on. If suitable locations can be identified, SPU would like to develop 20 blocks of roadside raingardens to divert and infiltrate up to 100,000 gallons of stormwater.
SPU presented their proposal to Ballard District Council on September 12th and also at a public meeting that was held on October 2, 2012. SPU materials
Community Questions and Comments Planned Community Process
Community Response: Cautious Support
Ballard District Council Asks Questions and Responds
On September 12, 2012, Andrew Lee of Seattle Public Utilities (SPU) briefed the Ballard District Council about their proposal for Ballard Roadside Raingardens Phase 2. As part of that briefing Mr. Lee answered questions that had been posed by the Ballard District Council and the Ballard Stormwater Consortium .Ballard District Council Questions
On October 10, 2012, the Ballard District Council voted unanimously to send a letter to SPU in which they responded to SPU’s proposal and asked for the establishment of a formal citizen advisory committee/work group that would work closely with SPU (and King County) in developing solutions to Ballard’s CSO problems. We are waiting for a response from SPU. Ballard District Council and Ballard Stormwater Consortium Response
Residential RainWise Program is helping but more help is needed
SPU is encouraging residents, churches and others in the Ballard Basin choose to disconnect their downspouts from the combined sewers and send the runoff into a cistern and/or raingarden. This is one way to reduce the size of the Combined Sewer Overflow (CSO) storage facility that is needed. As of the end of July, 142 Ballard residents had installed raingardens and/or cisterns with the help of the Rainwise incentive, reducing the CSO storage volume by 40,000 gallons. While this is good, it is only 25% of SPU’s target (160,000 gallons). Look into whether a raingarden or cisterns can work for you.
Eligibility Area Seattle Website Sustainable Ballard Website
Ballard studies begin
- SPU has started to evaluate the effectiveness of the redesigned raingardens on 28th Avenue NW and 30th Ave NW. In mid- September a contractor conducted flow monitoring tests, which were observed by several Ballard Stormwater Consortium Members. These will be followed by longer term monitoring to assess the effectiveness of the Phase I raingardens in reducing combined sewer overflows. We expect SPU to discuss these monitoring results with the Ballard community and that they will be considered in deciding whether it makes sense to move ahead with the Phase 2 roadside raingardens. Phase I Monitoring Plan
- SPU has also started to test the soil throughout the Ballard Basin. During the last two weeks of October the soil has been sampled at locations indicated on the Soil Map. According to SPU staff, the soil boring sites were chosen where there are gaps in historical boring data. We have asked to see the historical boring data for the glacial outwash area, where relatively few new boring have been done.
King County Council Adopts Long Range CSO Plan
In mid-September the King County Council adopted King County’s Long Range Strategic Plan. There were few substantive changes from the plan as it was submitted to the King County Council. This plan will affect CSO overflow’s in Ballard at 11th Avenue NW and 3rd Ave NW.
Ballard Stormwater Consortium in the News: