Earth Retaining Structure Design

The City of Issaquah is seeking a subcontractor to design earth retaining structures including retaining walls, soil nail walls, and reinforced soil slopes to support park grading, trail access, and erosion control efforts in hilly terrain. The work must address complex geotechnical challenges inherent to steep landscapes, ensuring structural stability, long-term durability, and environmental compatibility. The design scope requires engineering solutions that integrate with natural topography while meeting safety and regulatory standards for public infrastructure. The solicitation was posted on July 20, 2026, with responses due by August 14, 2026, under NAICS code 541330 for engineering services. This is a subcontract opportunity, indicating the selected firm will work under a prime contractor or larger project team. The place of performance is in Issaquah, Washington, and all work must comply with local and state requirements for land development and geotechnical engineering. Interested parties should submit proposals through the provided public purchase portal before the deadline.