Preserving Casper's Infrastructure: A Large Diameter Pipeline Trenchless Rehabilitation Project-Presentation Video

Video Transcription

Video Summary

The speaker describes a long-running project to assess and rehabilitate a failing sewer interceptor in Casper, Wyoming, which serves the North Platte River area. After a section collapsed near the wastewater plant, the city spent years studying corrosion, structural condition, and risk, using inspections, cameras, samples, and risk modeling to justify funding. Challenges included oversized, unlined concrete pipe, H2S-driven corrosion, harsh winters, high bypass costs, and repeated budget approvals from city council. The team first tried temporary mitigation, then prioritized the worst sections for rehabilitation using CIPP and slip lining. Phase one and two were completed successfully despite extreme cold and traffic constraints. The project won Trenchless Technology Project of the Year, came in under budget, and improved structural capacity and corrosion resistance. About $24 million remains for future rehabilitation, likely using a construction-manager-at-risk approach.

Keywords

sewer interceptor rehabilitation

Casper Wyoming

North Platte River

H2S corrosion

CIPP slip lining

trenchless technology