Project Overview
J-U-B ENGINEERS is providing design and construction services for the rehabilitation and installation of new conveyance pipes from the Wasatch Hollow outfall structure to the Emigration Creek outfall, located south of 1700 South in Salt Lake County. This project addresses aging infrastructure and improves stormwater conveyance and slope stability in a sensitive residential and natural area.
Infrastructure Assessment and Hydraulic Analysis
To fully understand the condition and functionality of the upstream and downstream systems, including the Wasatch Hollow basin and outfall structure. J-U-B conducted a comprehensive review of historical documentation, including the 1980 Basis of Design Report and 1992 Record Drawings. Meetings with Salt Lake County further informed project planning.
A detailed hydraulic study was performed to evaluate design flows through various conveyance piping options and energy dissipation structures. These analyses guided the selection of the most effective rehabilitation and conveyance strategy.
Design Solutions
The final design included a combination of rehabilitation techniques and new installations:
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Cured-in-place pipe (CIPP) for the 48-inch reinforced concrete pipes (RCP)
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Lining a squashed 60-inch corrugated metal pipe (CMP)—reduced to 49 inches in height—with a 54-inch Duramax pipe (later revised to CIPP during construction)
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Installation of 50 feet of new 54-inch Duramax pipe ending at an energy dissipation structure
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Incorporation of a U.S. Bureau of Reclamation Impact/Stilling Basin (20′ x 15′ x 12′) for flow energy dissipation
Additional Engineering and Environmental Considerations
A slope stability analysis was conducted to enhance safety, control erosion, and prevent settlement impacts on nearby residential structures along Emigration Creek. J-U-B also developed landscape architecture and tree preservation plans to protect the natural character of the area.
Stakeholder Coordination
The project required collaboration with multiple stakeholders, including Utah Public Lands, Parks and Recreation, and Urban Forestry, ensuring compliance with environmental and recreational land use standards.
Construction Timeline
Construction is anticipated to begin in early summer 2024, with a focus on minimizing disruption while improving long-term infrastructure performance and environmental protection.
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