SPU’s Latest Update on Broadview Sewer and Drainage Improvement Project

Celia Kennedy, Project Manager for Seattle Public Utilities (SPU) Broadview Sewer and Drainage Improvements Project, gave an update at the Broadview Community Council meeting on October 15.  Below is a summary she provided.

Dear Broadview Community,

Seattle Public Utilities (SPU) is working to improve the sewer and drainage system in the Broadview neighborhood. The following update provides the latest information about the project, and tips on how you can prepare for the rainy season.

Broadview Sewer and Drainage Improvement Project Update

The goals of the Broadview Sewer and Drainage Improvement Project are to reduce the potential for sewer backups to properties and in the right-of-way, as well as to reduce the potential for surface flooding to properties (building structures and yards) in Broadview.

Recent Draft Geotechnical Study Completed in the Western Portion of Broadview

This summer a geotechnical study in the western portion of Broadview was completed by SPU’s contractors to gain a better understanding of the hydrology in the area. A good understanding of the groundwater conditions and flows is necessary for SPU to develop effective sewer and drainage solutions. The western portion of Broadview has the highest frequency of sewer backups in all of Broadview. This study was needed because of the high groundwater table and steep slopes in this area.

Sewer and Drainage Options Analysis for the Western Portion of Broadview

SPU is analyzing the most viable sewer and drainage solutions for Broadview. SPU is evaluating alternative solutions to sewer backups and stormwater flooding in the western portion of Broadview, known as the 12th Ave. basin. We will examine potential options in terms of cost, time to implement, potential effects to residents during construction, environmental benefits/impacts, and other key factors. As we analyze the alternatives, we will work with the community to get your input on recommended solutions. We anticipate beginning design for capital improvements in the 12th Ave. basin toward the end of 2014. We are currently projecting to break ground on the 12th Ave. capital improvement project in 2016.

Sewer and Drainage Options Analysis for the Eastern Portion of Broadview

SPU will also be conducting a similar Options Analysis for the eastern half of Broadview (named Dayton Ave. basin) which will begin after we complete the analysis on the western portion of Broadview. The reason for this timing (as noted above) is because the 12th Ave. basin has a significantly higher frequency of sewer backups. Design for Dayton Ave. basin sewer and drainage improvements is currently projected to begin in early 2015.

Sandbags Available from Seattle Public Utilities

SPU wants to help you “Take Winter by Storm” by offering a limited number of free, pre-filled sandbags. Sandbags will be available in mid-October (an exact date will be provided when available). Note that sandbags are heavy (they weigh about 40 pounds each), so be sure either you, or someone you bring with you, can lift, carry, and load the sandbags into your vehicle. The nearest sandbag pick-up location is the:

Helene Madison Pool

13401 Meridian Ave. N

Seattle 98133

Be Prepared for Stormy Weather

Since the rainy season has returned to Seattle this fall, we would like to remind you to be prepared by cleaning storm grates near your home, and placing sandbags at key sites to help prevent flooding. While sandbags don’t seal out water, they can help redirect the flow of water. Sandbags must be used with caution because it is illegal to divert water to your neighboring properties. Sandbags can be purchased at Home Depot and other locations, and will be available through SPU starting later this fall (see above).

Prior to a storm event in early September, we provided tips on preparing for the storm season on the Broadview listserve. These tips are provided below. As always, please report any sewage back-up issues in your home, or stormwater flooding problems, by calling the Seattle Public Utilities 24/7 Operations Response Center at 206-386-1800.

Thank you for your patience during the technical analysis phases of this large capital improvement project. Working with the members of the community, we will build effective long-term sewer and drainage system improvements in Broadview.

Thank you,

Celia S. Kennedy, MPA

Project Manager

Broadview Sewer and Drainage Improvement Project


(206) 409-3651


Here are some tips to help you prepare for a storm:

  • ·      Keep backflow valves on your side sewer in good working condition: If you have a backflow valve, please clean it four times a year and replace any non-working parts. Those with flap gate valves should inspect and clean those valves to ensure they are in working order. Those with knife gate valves should exercise those valves per manufacturer instructions to ensure proper operation.
  • ·      Keep storm drains free of debris: Check your neighborhood storm drains and remove any debris that has accumulated. Check storm drains again during storms to ensure they remain open and free flowing. Silt socks or other catch basin inserts near construction projects can be a hazard during storms. If you know of any areas in your neighborhood where construction is complete, but catch basin inserts remain, call 206-386-1800 to have them removed.
  • ·     Have sandbags on hand: If you live in an area that you know is prone to flooding, consider keeping some sandbags nearby for your own use. Sandbags don’t seal out water, but can help redirect the flow of water and protect property from debris. Sandbags must be used with caution because it is illegal to divert water to your neighboring properties.
  • ·     Stay out of the way of flood waters: Play it safe and stay out of low-lying areas during times of heavy rains. If your basement is prone to flooding, stay out of it and other low points until the risk of flooding has passed.
  • ·     Stay safe when driving: Don’t try to drive through large puddles where you can’t judge the water depth.

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