Status: Completed June 2011
Since incorporation, the City has taken an aggressive approach to repairing or replacing aging infrastructure at Ronald Bog and elsewhere in the City. Those efforts are paying off as we see significant areas of flooding reduced and/or eliminated. This has allowed our operations team and communities to shift from a reactionary mode, to one of preparedness.
Ronald Bog Early Warning System
Overview & History
Ronald Bog is a visible part of the Thornton Creek Watershed, which runs through Shoreline and Seattle into Lake Washington at Matthews Beach. Flooding problems in Shoreline's area of the watershed have affected 15 to 20 homes. Improvements completed through 2011 provide an increased level of flood protection for the neighborhood south of Ronald Bog. The first priority focused on replacement of failing infrastructure. This work included:
- Installation of new box culverts near Corliss Place
- Replacement of the 18” street system on Corliss Avenue
- Replacement the 30” pipe that is the outflow for Ronald Bog
All of these elements were in place much longer than their life expectancy; they were failing and maintenance had become expensive. The new systems will operate more efficiently and with greater reliability.
Next was to work on further reduction of the potential for flooding. That work includes:
- Installation of a pump and a bypass pipe in Corliss Place
- Construction of a small flood wall on the Crusoe property
- A monitoring system with reporting on the internet
- A flood barrier along the south edge of Ronald Bog (completion expected in November 2011)
Past Community Meetings:
The City held a community meeting on April 6, 2010 at City Hall. Staff provided an update on flood reducing alternatives the City is considering for Ronald Bog and answered questions from the community.
View the presentation from the April 22, 2009 meeting.