Project Overview
The Upper Conduit pipeline is a 48-inch transmission line operated by the Salt Lake City Department of Public Utilities (SLCDPU). Spanning approximately 16,000 linear feet, the pipeline conveys culinary water from the mouth of Parley’s Canyon to a storage tank located within the Bonneville Boulevard Golf Course.
Assessment and Pre-Design Analysis
Given the pipeline’s terrain, location, and alignment, a variety of trenchless rehabilitation methods were considered to minimize disruption and ensure feasibility. The pipeline was divided into five phases based on accessibility and constructability. J-U-B ENGINEERS, Inc. conducted a detailed investigation and analysis to determine the most appropriate rehabilitation approach for each phase. These findings were documented in a comprehensive pre-design analysis report.
Design and Rehabilitation Approach
J-U-B completed the design for all five phases of the Upper Conduit Repair project, applying a mix of trenchless and open-cut methods based on site conditions and cost efficiency:
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Phases 1, 2, and 4: HDPE sliplining
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Phase 3: Carbon Fiber Reinforced Polymer (CFRP) rehabilitation
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Phase 5: Open trench pipe installation
In addition, cast-in-place concrete manway structures were designed for all phases to ensure accessibility and long-term durability.
Project Support and Implementation
J-U-B has supported SLCDPU with contractor pre-qualification, bidding assistance, construction management, and public involvement efforts for phases 1 through 3. Designs for phases 4 and 5 are complete and prepared for advertisement, with construction scheduled in accordance with SLCDPU’s budget and timeline.
This phased and innovative rehabilitation strategy allows SLCDPU to address critical infrastructure needs while balancing technical, environmental, and fiscal considerations.
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