Bottoms is a private dam located in Middletown, California, along the Tr Helena Creek. Built in 1990, this earth dam stands at a height of 47 feet and has a maximum storage capacity of 315 acre-feet. The primary purpose of Bottoms is to provide water supply for irrigation, recreation, and domestic use in the area. It is regulated by the California Department of Water Resources (DWR) and is subject to regular inspections to ensure its safety and compliance with state regulations.

With a Hazard Potential rating of "High" and a Condition Assessment of "Satisfactory," Bottoms poses a significant risk in the event of a failure. Despite its satisfactory condition, emergency action plans (EAP) and risk management measures are not clearly specified for this dam, raising concerns about its preparedness for potential emergencies. The dam's last inspection was conducted in December 2020, with a frequency of once per year, indicating ongoing efforts to monitor and maintain its structural integrity. As a vital water resource infrastructure in the region, ensuring the safety and resilience of Bottoms is crucial for safeguarding both the environment and the surrounding communities.