Located in Larimer County, Colorado, Floodwater Retention B-5 is a privately-owned earth dam designed by the USDA NRCS and completed in 1977. With a height of 80 feet and a storage capacity of 2502 acre-feet, this structure plays a crucial role in flood risk reduction along the South Branch Boxelder Creek. The dam covers a surface area of 77 acres and has a drainage area of 18 square miles, providing protection to the surrounding area from potential flooding events.

Managed by the Colorado Department of Water Resources, Floodwater Retention B-5 is classified as having a significant hazard potential but is currently rated as being in satisfactory condition. Regular inspections are conducted to ensure the structure's integrity, with the last assessment carried out in October 2019. Despite its high risk assessment, the dam has no spillway and a maximum discharge capacity of 14,807 cubic feet per second, highlighting its importance in mitigating flood events and protecting downstream communities. With its strategic location and design, Floodwater Retention B-5 stands as a vital asset in the region's water resource management efforts.

In the event of an emergency, the dam's Emergency Action Plan (EAP) is crucial for coordinating response efforts and ensuring public safety. While specific details regarding the EAP's status and adherence to guidelines are not provided in the data, the presence of a risk assessment indicating a high risk level underscores the importance of proactive risk management measures. As climate change continues to impact weather patterns and intensify precipitation events, the role of structures like Floodwater Retention B-5 becomes increasingly vital in safeguarding communities and infrastructure from the dangers of flooding.