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

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Video Summary

Casper, Wyoming’s aging wastewater interceptor along the North Platte River suffered severe corrosion from hydrogen sulfide and exposed reinforcing steel. Although the oversized, unlined concrete pipeline was at high risk of collapse—and a failure could release sewage into a sensitive recreational river—funding and approvals took roughly 14–17 years. The project team conducted inspections, material testing, and risk assessments to demonstrate the urgency and secure support.<br /><br />With limited funding, the city prioritized the most critical sections and selected cured-in-place pipe (CIPP) and sliplining. Construction began in 2022, requiring extensive wastewater bypassing, careful traffic management, and work around difficult features such as a highway crossing and pipes cut by a gas line. Record cold forced a winter shutdown, but work resumed and was completed in 2023.<br /><br />The rehabilitation cost about $6.5 million, came in under budget, and received a trenchless technology project-of-the-year award. Approximately $24 million in pipeline work remains.

Keywords

wastewater interceptor

North Platte River

cured-in-place pipe

sliplining

trenchless rehabilitation

Casper Wyoming