D.O.E. Rocky Flats B-5, also known as South Walnut Creek No. 5, is a federally-owned dam located in Westminster, Colorado. Built in 1979, this earth dam stands at a height of 48 feet and serves the primary purpose of flood risk reduction along the Walnut Creek. Managed by the Department of Energy, this dam has a storage capacity of 70.9 acre-feet and a normal storage level of 14.3 acre-feet, covering a surface area of 2.17 acres.

Despite its low hazard potential, D.O.E. Rocky Flats B-5 is subject to state regulations and inspections by the Colorado Division of Water Resources. With a maximum discharge capacity of 3500 cubic feet per second and an uncontrolled spillway width of 80 feet, this dam plays a crucial role in mitigating flood risks in the area. While the condition assessment of the dam is currently listed as "Not Available," its risk assessment is rated as moderate.

In the event of an emergency, the preparedness measures and risk management protocols for D.O.E. Rocky Flats B-5, as well as the existence of an Emergency Action Plan, are not currently specified in the data. However, with its strategic location and vital role in flood control, this dam remains a significant asset in the water resource management and climate resilience efforts in Jefferson County, Colorado.