Arroyo Seco, also known as Loch Lane, is a privately owned dam located in Ione, California. This earth dam, completed in 1957, stands at a height of 67 feet and serves primarily for water supply purposes, including irrigation. The dam has a storage capacity of 2433 acre-feet and is situated on Tr Dry Creek in Amador County, with a drainage area of 0.44 square miles.

Managed by the Natural Resources Conservation Service, Arroyo Seco is regulated by the California Department of Water Resources and undergoes regular inspections to ensure its safety and compliance with state regulations. With a significant hazard potential but a satisfactory condition assessment as of September 2017, the dam plays a crucial role in water resource management in the region. Its last inspection was conducted in September 2020, with an inspection frequency of once per year.

Arroyo Seco not only provides essential water supply for the area but also contributes to the overall water management efforts in California. As a key infrastructure for irrigation and water supply, this dam showcases the importance of sustainable water resource management in the face of climate change challenges. The collaboration between private ownership, state agencies, and federal partners underscores the shared responsibility in safeguarding our water resources for future generations.