Floodwater Retention B-4, located in Larimer County, Colorado, serves as a vital infrastructure for flood risk reduction along Indian Creek. Built in 1978 by USDA NRCS, this earth dam stands at a height of 28 feet and stretches over 1100 feet in length. With a storage capacity of 2208 acre-feet and a drainage area of 13 square miles, the dam plays a crucial role in mitigating flood hazards in the region.

Managed by a private owner, Floodwater Retention B-4 is regulated by the Colorado Division of Water Resources, ensuring its compliance with state permitting, inspection, and enforcement requirements. Despite its high hazard potential, the dam is assessed to be in satisfactory condition, with the last inspection conducted in September 2019. The dam's emergency action plan is up to date, and it has been identified as a high-risk structure, underscoring the importance of continued monitoring and risk management measures.

As a key component of flood risk reduction efforts in the area, Floodwater Retention B-4 underscores the critical role of infrastructure in safeguarding communities and ecosystems from the impacts of extreme weather events. Its strategic location, design, and operational standards highlight the collaborative efforts between public agencies and private owners to enhance resilience and protect against the adverse effects of climate change on water resources.