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Sammamish Town Center (not licensed)

Storm Facility Restoration Program

Public Works

Associate Engineer - Stormwater

Kathryn Hoffmann
(425) 295 0515

About the Program

The Storm Facility Restoration Program was adopted in the 2023-2028 Stormwater Capital Improvement Plan. Projects in this program may vary and are typically identified through inspections by City staff. While the priority scores for these restoration projects may rank lower than projects in other programs, they are vital to reducing flood risk and to increasing water quality. Pro‐actively restoring our facilities allows staff to bundle projects to maximize efficiencies. 

What's the latest?

The City maintains an on-call contract to assist with the design for restoration of stormwater facilities. Several projects are being pursued for design in 2025-26:

  • Trossachs Gabion Wall
  • East Montage Vault - Alternatives Analysis
  • 212th Ave SE Wetland Detention Pond Wall
  • Sorrento Heights (Cambria) Pond

The Project Areas Today

Trossachs Gabion Wall

The gabion wall is failing and was identified by staff during routine inspection. The City contracted with a geotechnical consultant to understand the risk posed by the wall as well as a civil consultant to evaluate and design an efficient solution.

Next Steps:

  • Hire consultant to develop alternatives and cost estimates
  • Design a repair, anticipated in 2025
  • Hire contractor to construct

East Montage Vault - Alternatives Analysis

The East Montage Vault restoration was identified by the Zackuse Basin Plan.

Next Steps:

  • Hire consultant to develop alternatives and cost estimates
  • Select preferred alternative
  • Hire contractor to construct, TBD

212th Avenue SE Wetland Detention Pond Wall

The wetland and detention pond, located in the Pennington Court subdivision, has been in service since early 2002. Over the last few storm seasons, the wall has started to slowly leak into the adjacent hillside. The City has reached out to a geotechnical consultant to understand the risks and identify an efficient solution.

Next Steps:

  • Hire consultant to determine the cause of leaking, in progress
  • Provide a cost-efficient solution with alternatives
  • Hire contractor to construct, TBD

Heritage Hills Pond

The existing pond outlet is blocked due to excessive sedimentation causing water quality treatment to be impaired. The City is reviewing the issue and determining the best solution to move forward.

Next Steps:

  • Hire consultant to develop alternatives and cost estimates
  • Design a repair
  • Hire contractor to construct, anticipated in 2026