Annabella West Detention Basin, located in Annabella, Utah, is a vital water resource infrastructure designed by Jones & DeMille to address the state's regulatory needs for water management. Completed in 2017, this earth dam stands at a structural height of 21 feet with a hydraulic height of 16 feet, providing a maximum storage capacity of 53.7 acre-feet. The basin serves a drainage area of 6 square miles and is regulated by the Utah Division of Water Rights, ensuring proper inspection, permitting, and enforcement.

With a significant hazard potential and a recommended inspection frequency of every 3 years, Annabella West Detention Basin plays a crucial role in mitigating flood risks and managing water flow in the region. Despite not being rated for its condition assessment, the basin remains a key asset for local government water management efforts in Sevier County, Utah. As a part of the Los Angeles District, the basin serves as a testament to the collaborative efforts between federal and local agencies in safeguarding water resources and infrastructure in the face of climate challenges.