Delridge Natural Drainage Project Updates
Highland Park/Delridge Rain Gardens
March 20, 2014 - Roadside Rain Garden Locations Selected
Thanks to everyone who participated in our 2013 outreach events! We’ve received a wealth of input from you which will help ensure we design and build the best project possible. After several months of door-to-door visits, public meetings, surveys, emails and phone calls, we have identified the most-promising sites for natural drainage in the South Delridge neighborhood.
Based on community input through November 2013 and refinement of project scope due to cost considerations, these sites are the selected locations for roadside rain gardens (pdf): 17th Avenue SW from SW Kenyon to Henderson Streets; portions of the intersecting cross streets will be included based on performance, existing site conditions and project criteria. Please note that 17th Avenue SW between SW Henderson and Barton Streets has been removed from the project area due to a lack of cost-effectiveness.
In 2014, we will continue to gather your input about the design, including specific locations for rain gardens, access points to your home, preferences for plants, and other design issues. Construction is not scheduled to begin before spring 2015, but you may see survey or geotechnical crews in the area throughout the design of the project.
Frequently Asked Questions (FAQs)
What kind of public input did we consider?
- Input from the Nov. 19 open house
- Input from the Oct. 19 Walk and Talk on the Block with residents
- Neighborhood survey responses (more than 280). Read the survey results (pdf)
- July 9 public meeting (more than 80 participants)
- Input provided by community groups about:
- Traffic safety concerns
- Known drainage or sewer back-up problems, and
- Places people wanted to walk and bike
- Field observations of slopes, street widths, and plantings
- Review of traffic volume, speed, and collision data
The City is already constructing a neighborhood greenway along 26th Avenue SW and is starting to study it for natural drainage improvements. Find out more.
- Finalize the blocks where roadside rain gardens would be constructed.
- Work with residents on those blocks to finalize design.
- Continue to work with the team planning the neighborhood greenway to coordinate design and construction.
Does this mean that I won’t be able to park on the street?
Natural drainage projects in the public right-of-way are likely to affect some on-street parking. We know that parking and access from the street to the sidewalk is very important to residents, and we will carefully consider and address the impacts on every block where roadside rain gardens would be built.
Resident’s feedback about concerns regarding on-street parking is one of the pieces of input that helps to determine where to place natural drainage projects. If your block is identified for rain gardens, you will have opportunities during 2014 to provide input about the design.
Sign up for the Delridge/Highland Park email list to receive project updates.
Past Project Updates
November 19 and October 19, 2013
SPU held community outreach meetings to gather public input to help ensure we design and build the best project possible. After six months of various types of community outreach, SPU proposed locations for roadside rain gardens (pdf) based on the most-promising sites for natural drainage.
September 10, 2013
To make it safer for people of all ages and abilities to walk and ride bikes, a neighborhood greenway is planned in the Delridge/Highland Park area. As part of the project, natural drainage systems would be built along some parts of the route.
After analyzing data and reviewing public input, the most-promising greenway route has been identified as 17th Avenue SW from Roxbury to Kenyon or Holden Streets.
See more on this map (pdf)
The route would continue north on 21st Avenue SW and connect to the West Seattle Bridge Trail. More studies will be done to see how to best make this connection. Potential east-west neighborhood greenway routes are also being considered for implementation in the future.
A neighborhood greenway would reduce the speed limit to 20 miles per hour, add speed humps, and make it easier to cross busy streets. Natural drainage would include rain gardens along the edges of the streets to improve drainage and protect Longfellow Creek from pollution. Read the story of one creekside resident (pdf)
July 9, 2013
Surveys were mailed to residents living along the five possible routes (pdf) for a neighborhood greenway and 26th Ave SW Greenway, which is currently in construction. Results from the survey will help gauge community preference for locating natural drainage projects.
In addition, SPU and SDOT worked with White Center Community Development Authority (WCCDA) to improve outreach efforts. Ambassadors from the WCCDA made several door-to-door visits along each route to share information about the projects, encourage participation and invite the community to the July 9 public meeting.
October 4, 2012
SPU held an informative open house in Delridge presenting the overview of combined sewer overflow (CSO) problems into Longfellow Creek, strategies for reducing CSOs and project schedule.