West Side Detention Dike No. 4, located in Riverside, California, is a key structure managed by the Bureau of Reclamation for flood risk reduction along the Whitewater River. Completed in 1968, this Earth type dam stands at a height of 48 feet with a hydraulic height of 33 feet and a length of 18,900 feet. It has a NID storage capacity of 4,900 acre-feet, serving as a crucial defense against potential flooding in the area.

With a low hazard potential and a very high risk assessment rating, West Side Detention Dike No. 4 plays a vital role in protecting the surrounding community from the impacts of extreme weather events. The dam is under the jurisdiction of the Bureau of Reclamation, which also oversees its regulatory, inspection, and operational functions. Despite its importance in flood risk reduction, the dam's current condition assessment is not available, highlighting the need for continued monitoring and maintenance to ensure its effectiveness in safeguarding the area.

As a federal structure, West Side Detention Dike No. 4 reflects the collaborative efforts of various agencies to manage water resources and mitigate climate-related risks. Its strategic location and design underscore the importance of proactive measures in safeguarding communities against the threats posed by changing environmental conditions. Water resource and climate enthusiasts can appreciate the significance of this dam in enhancing resilience and protecting vulnerable areas from potential flooding events.