These photos show a precast doghouse-style utility vault installed over an existing 60-inch concrete interceptor sewer line for the City of Spokane. This major interceptor line connects directly to the Spokane Wastewater Treatment Plant, making uninterrupted operation critical during construction.

By utilizing a doghouse vault, the contractor was able to install the new precast structure without interrupting flow—keeping the interceptor line fully active throughout the project. This minimized downtime, reduced risk, and allowed for a more efficient installation process.

Project Details:

• Vault Type: Precast Doghouse Utility Vault
• Pipe Size: 60″ Concrete Interceptor Line
• Location: Spokane, Washington
• Key Benefit: Installation without shutting down sewer line

This approach is ideal for retrofit utility vaults, interceptor line access structures, and live-line sewer infrastructure upgrades where service continuity is essential.