Microtunneling

Tualatin Interceptor and Siphon Improvements

Tualatin Interceptor and Siphon Improvements

Scope

Michels used microtunneling to build a 470-foot long tunnel approximately 40 feet under the Tualatin River. The 84-inch diameter tunnel has a 650-foot radius U-shaped curve,which is a North American record. Inside the 82" RCP casing, the tunnel contained a bundle of three HDPE pipelines 14 inches, 16 inches and 30 inches in diameter. The carrier pipes replace the original wastewater siphon and provide service for the municipality.

Projects

Microtunneling

Schweitzer Pump House Wet Well & Intake Piping

Minnesota

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Schweitzer Pump House Wet Well & Intake Piping

Microtunneling

Delco Raw Water Pump Station

Ohio

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Delco Raw Water Pump Station

Microtunneling

Columbia Water Supply

Washington

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Columbia Water Supply

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