Project Overview
In April 2024, J-U-B completed construction on the Logan Second Dam Sediment Removal Project for Logan Light and Power. The project addressed decades of sediment build-up in the Second Dam reservoir, which had significantly reduced hydroelectric efficiency and caused damage to turbines. J-U-B, in partnership with Fanson Engineering, provided design and construction support to remove more than 34,000 cubic yards of sediment and restore functionality to this key hydroelectric asset on the Logan River.
Challenges
Key challenges included a lack of local dredging experience and environmental concerns related to water quality in a blue-ribbon trout stream. Out-of-state contractors were brought in to bid the specialized dredging work, with Michaels Corporation from Wisconsin ultimately selected. During construction, the initial disposal site was rejected due to saturated material, requiring a rapid solution to prevent project delays.
How We Addressed the Issues
J-U-B coordinated with multiple dredging contractors to secure a competitive bid and worked closely with the Utah Department of Water Quality to establish acceptable turbidity levels. When the first dump site was denied, the team quickly collaborated with stakeholders to identify and permit an alternate site within one week. Real-time turbidity monitoring was implemented to ensure compliance and protect river health.
Results
Crews worked six days a week, including holidays, to meet the tight timeline. The project was completed before spring runoff, allowing the dam to operate at full capacity with no significant environmental impacts. The owner was highly satisfied with both the outcome and the teamwork involved throughout the project.
Benefits
Sediment removal extended the lifespan of the hydroelectric system, improved energy efficiency, and protected downstream infrastructure. The project also demonstrated a strong model of collaboration among engineers, environmental regulators, and construction teams.
Uniqueness
The use of amphibious equipment and real-time environmental monitoring made this project stand out. The rapid problem-solving and multi-agency cooperation showcased J-U-B’s ability to lead complex, high-stakes infrastructure work in sensitive environmental settings.
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