Day Creek Debris Basin, located in Alta Loma, California, serves as a critical structure for debris control along the Day Creek river stream. Built in 1988 by local government authorities, this earth dam stands at a height of 90 feet with a hydraulic height of 70 feet, providing a storage capacity of 140 acre-feet. With a drainage area of 5.06 square miles, this dam plays a crucial role in protecting the surrounding area from potential hazards and ensuring the safety of residents in San Bernardino County.

Managed by the Department of Water Resources and regulated by the Safety of Dams division, the Day Creek Debris Basin has a high hazard potential but is deemed to be in satisfactory condition according to the latest assessment in 2017. Its last inspection in December 2019 reaffirmed its operational readiness, with an inspection frequency of 1 year to ensure ongoing safety compliance. Despite its critical role in debris control, the dam has not been modified in recent years, indicating a stable and well-maintained infrastructure that continues to serve its primary purpose effectively.

In the event of an emergency, the dam is equipped with established emergency action plans and contacts, although the specifics of these preparations have not been updated recently. With its strategic location and robust design, the Day Creek Debris Basin stands as a vital component of the region's water resource management and climate resilience efforts, highlighting the importance of proactive infrastructure maintenance and risk mitigation strategies in safeguarding communities against potential disasters.