- Environment & Conservation
- Construction & Development
- Businesses & Key Accounts
- Help & FAQs
- About Us
This report summarizes the results of a study of the sanitary sewers in the Broadview area conducted over 2 years from 2008 to 2010. Broadview is located in northwest Seattle and includes the area between NW 130th Street, NW 105th Street, Fremont Avenue N, and NW Blakely Court. The study investigated alternatives to improve the performance of Broadview sanitary sewer system.
Five problem areas were identified as the focus for analysis based on the data collected and four alternatives were developed and evaluated to improve capacity. In addition, other options of a preventive nature including enhanced maintenance and use of backflow preventers were examined.
Besides these specific areas, the study also includes recommendations that are area-wide in nature, such as the value of reducing inflow through the use of Green Stormwater Infrastructure (GSI) where possible and cost-effective.
It should be noted that this was an investigative study, and does not represent a preliminary engineering report. Before specific projects are designed to be included in SPU’s capital improvement plans, a more detailed analysis of the cost and benefits of the options is done, compared to other possible projects, and funding identified.
The newly completed Broadview study is summarized in the Project Summary Report (pdf). (Figure 4 – detailed map of study area, pdf). Additional information about the study area is included in the Problem Identification Technical Memorandum (pdf), and the supporting modeling is described in the Modeling Report (pdf).