Tiger Creek Afterbay, located in Pioneer, California, is a privately owned hydroelectric facility situated on the North Fork Mokelumne River. The dam, completed in 1931, stands at a height of 120 feet and has a storage capacity of 2,610 acre-feet. With a maximum discharge of 194,370 cubic feet per second, the controlled spillway, measuring 292 feet wide, ensures efficient water release during high flow events.

Managed by the Federal Energy Regulatory Commission, Tiger Creek Afterbay has a high hazard potential due to its structural height and proximity to populated areas. The facility boasts 10 radial Tainter gates for water control, ensuring the safety and stability of the dam. Despite its age, the dam's condition assessment is not currently available, highlighting the importance of regular inspections and maintenance to mitigate risks associated with its very high risk rating.

Water resource and climate enthusiasts will be fascinated by Tiger Creek Afterbay's historical significance and vital role in hydroelectric power generation. As a key component of California's water infrastructure, the facility's efficient design and regulated operation showcase the intersection of human ingenuity and environmental stewardship. With a strong emphasis on safety and risk management measures, Tiger Creek Afterbay stands as a testament to the ongoing efforts to balance water resource utilization with conservation and public safety in the face of changing climate conditions.