The Tuacahn Wash Upper Detention Basin in Ivins, Utah, stands as a vital structure designed by ALPHA ENGINEERING for flood risk reduction. Completed in 2013, this private-owned Earth dam holds a maximum storage capacity of 50.1 acre-feet and serves to protect the surrounding area from potential inundation during heavy rain events. With a hydraulic height of 16 feet and a structural height of 20 feet, this detention basin plays a crucial role in managing stormwater and preventing potential flooding in the region.

Located in Washington County, this detention basin is regulated by the Utah Division of Water Rights, ensuring that it meets all required standards for inspection, enforcement, and permitting. The dam's condition is assessed as satisfactory, with a significant hazard potential, underscoring its importance in mitigating flood risks for the local community. With a drainage area of 2 square miles and a maximum discharge capacity of 433 cubic feet per second, the Tuacahn Wash Upper Detention Basin serves as a key component in the area's water resource management infrastructure, providing essential protection against potential flood events.

Overall, the Tuacahn Wash Upper Detention Basin stands as a critical piece of infrastructure in Washington County's flood risk reduction strategy. With its strategic location and design features, including a stone core and soil foundation, this Earth dam effectively manages stormwater and protects the community from potential inundation. As a privately owned structure with state oversight, this detention basin exemplifies the collaborative efforts required to safeguard water resources and mitigate the impact of extreme weather events on local communities.