Big Dry Creek Sewer Interceptor Project

What’s Happening Now

The City of Westminster is planning to upgrade a major sewer pipeline located within the Big Dry Creek corridor. Periodic fieldwork will be conducted in 2026 within the Big Dry Creek Open Space adjacent to the existing pipeline and near portions of the trail between Harmony Parkway and Huron Street, north of 128th Avenue. 

Schedule

The project will take place in phases: 

• Winter 2026: Evaluation and design
• 2027: Anticipated start of construction

More detailed schedules and trail information will be shared in advance of construction, including notice of expected detours or temporary closures.

Crews will conduct geotechnical drilling, sampling, surveying, inspections, and pipe cleaning. Heavy equipment will be used at times. Trail users and visitors are encouraged to use caution, adhere to signage, and avoid active work areas when using the open space trail.  

What Neighbors and Trail Users Can Expect

The City recognizes that this work is taking place in an area valued by residents and trail users. Construction planning will carefully consider open space use, nearby residences, and environmental protections. During the project, the City will focus on:

• Maintaining trail access whenever it is safe to do so
• Using short-term, clearly marked detours if temporary closures are needed
• Restoring disturbed areas once work is complete
• Managing noise, odors, and construction activity to minimize impacts

Future Work Planned

The project focuses on evaluating and improving a large underground sewer line located near Big Dry Creek, adjacent to open space and multi-use trails. Planned work will generally include:

• Inspection and evaluation of the existing underground pipeline
• Design of a solution that strengthens or extends the life of the pipeline, minimizing replacement where feasible
• Targeted construction activities to improve long-term reliability
• Temporary access areas for crews and equipment, coordinated to reduce disruption

Although the pipeline is buried deep below the ground, accessing it requires surface activity at select locations.  These are activities will be planned to limit the overall footprint and duration of impacts to nearby homes, open space, and recreational areas.