Timothy Lake, located in Clackamas County, Oregon, is a captivating reservoir with a primary purpose of hydroelectric power generation. This private-owned lake, managed by the Federal Energy Regulatory Commission, holds a significant storage capacity of 66,000 acre-feet and covers an expansive surface area of 1,430 acres. The dam, completed in 1956, stands at a height of 100 feet and has a controlled spillway to manage water flow.

The Oak Grove River feeds into Timothy Lake, providing a vital water source for the surrounding area. The lake is not only essential for hydroelectric power but also serves as a recreational destination for visitors seeking outdoor activities such as fishing, boating, and hiking. With a maximum discharge capacity of 16,000 cubic feet per second, the dam plays a crucial role in regulating water flow and ensuring safety for downstream areas.

Despite its high hazard potential, Timothy Lake has not undergone a recent condition assessment. However, emergency preparedness measures are in place, with an Emergency Action Plan last revised in May 2021. With its strategic location and impressive infrastructure, Timothy Lake continues to be a significant contributor to water resource management and climate resilience efforts in the region.