As of December 2019
Phase: Pre-Design


  • Design & Permitting Phase: Fall 2019 – Winter 2021
  • Construction Phase: Summer 2021
A fallen tree in the drainage channel upstream of M-1 Dam causing erosion damage A fallen tree in the drainage channel upstream of M-1 Dam causing erosion damage

Overview and History

In December of 2017, a tree fell into the drainage channel immediately upstream of the City’s M-1 Dam. This dam was constructed in 1987 (prior to the City’s incorporation) to provide inline stormwater detention within the Boeing Creek basin. In-channel flows diverted by the tree caused substantial erosion damage to the maintenance access road adjacent to the channel. The access road is used primarily for general maintenance of the dam, including access for larger equipment to clean the sediment trap.

The City’s Surface Water Utility engaged an on-call consultant to study and prepare a preliminary design recommendation for the repair of the access road. During review of the repair process, it was determined that a broader analysis of the channel and side slope configuration was advisable in order to identify proactive mitigation strategies for potential future problems. 

This project will evaluate and progress the project design to final and construction for these improvements.


If you would like to communicate with the City of Shoreline or review a document in another language, please send your request along with your contact information to the email address below or call (206) 801-2700.

Si le gustaría comunicarse con la Ciudad de Shoreline o revisar un documento en otro idioma, por favor envíe su solicitud junto con su información de contacto a la dirección de correo electrónico a continuación o llame al (206) 801-2700.

您若希望與 Shoreline 市展開交流或 閱讀以其他語言寫成的文檔, 請寄送您的請求及您的連絡資訊至下方所示的電子郵件地址,或撥電話 (206) 801-2700。

쇼어라인시(City of Shoreline)로 연락이요하시거나 문서를 다른 언어로 보시려면 연락 정보와 함께 요청 사항을 아래 이메일로 보내시거나 (206) 801-2700으로 전화해 주십시오.

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Kung nais niyong makipag-usap sa Lungsod ng Shoreline o rebyuhin ang dokumento sa ibang wika, pakipadala ang inyong kahilingan kasama ang impormasyong pagkokontakan sa inyo sa email address sa ibaba o tawagan ang (206) 801-2700.


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