Mill Creek Lake in Lemhi, Idaho, is a privately owned water resource with a state-regulated dam that was completed in 1928. The dam, primarily made of earth and stone, stands at a height of 19.3 feet and has a hydraulic height of 15.8 feet, creating a storage capacity of 210 acre-feet. With a controlled spillway and low hazard potential, the dam is deemed to be in fair condition as of its last inspection in 2016.

This scenic lake covers a surface area of 29 acres and is fed by Mill Creek and the Lemhi River. Its primary purpose is classified as "Other," and it serves as a vital water source for the surrounding area. Despite its fair condition assessment, the risk assessment for Mill Creek Lake is rated as very high (1), indicating a need for continued monitoring and risk management measures to ensure the safety and sustainability of this important water resource in Idaho.

Surrounded by the natural beauty of Lemhi County and situated within the Walla Walla District, Mill Creek Lake offers a peaceful retreat for water resource and climate enthusiasts. With its historic dam structure, ample storage capacity, and picturesque setting, this lake is not only a valuable resource for the community but also a captivating destination for those who appreciate the intersection of water management and environmental stewardship.