Daniel Way Creek Stabilization Project

The City is undertaking a stream channel stabilization project along Three Sisters Creek, adjacent to Daniel Way. There are areas of severe erosion along the banks of the creek and stream, and it has begun to undermine the curb along the road.

Scope and Schedule

The first phase of work involves survey, mapping, permitting and engineering design tasks. The data gathered from a detailed survey and mapping of the existing topography, utilities, trees and resource protection areas will inform the design and provide the information necessary for completing applications to the various agencies. It is anticipated that permits will be required from Oregon Division of State Lands (DSL), US Army Corps of Engineers (ACOE), Oregon DEQ and the City of Lake Oswego.

Phase two of the project will involve packaging the design and specifications into a contract format and bidding out the project for construction. 

The third phase of work will involve construction. This is expected to occur once bids are received and a contractor is selected, sometime in late spring/early summer 2023. The project will involve realigning a portion of the stream and planting new plants and trees to help stabilize the creek.

Per the DSL permit, any in-stream work will occur from July 15 – September 30, 2023. Some plantings will occur in spring 2024 due to the availability of the type of plantings.

What to Expect During Construction

Approved City work hours are 7 a.m. – 6 p.m., Monday to Friday, and 8 a.m. – 6 p.m. on Saturdays.

Tree Removal

A certified arborist has assessed the health of all trees located within the project limits. 63 trees are expected to be removed for the stabilization project. 50 are Type II, 9 are invasive and 4 are dead.  A tree removal application has been submitted, the trees have been flagged and the site has been posted.  The tree removal application, including the arborist report, can be found here. 

More than 150 trees and 1,000 shrubs will be planted back as part of the project improvements.

Tree removal is expected to occur in the early stages of construction, likely mid-June 2023.

Road Closure

• During construction, there will be a full road closure for all through vehicles on Daniel Way, between Carman Drive and Kruse Way Place.
• Local access will be maintained for businesses, offices, residents and emergency responders in the closure zone.
• There will be no through vehicular access north of the Yakima parking lot and south of the Uplands Park Condos.
• Pedestrian access will remain open on the existing pathway.