Western Mobile Lake 4, located in Boulder, Colorado, is a state-regulated dam situated along the St. Vrain River. This earth dam stands at a height of 31 feet, with a structural height of 33 feet and a length of 1050 feet. The reservoir has a storage capacity of 710 acre-feet, with a normal storage level of 598 acre-feet and a surface area of 32 acres.

Despite being classified as having a low hazard potential, Western Mobile Lake 4 is considered to have a high risk level due to certain factors. The dam's condition assessment is currently labeled as "Not Rated," and there is no existing Emergency Action Plan (EAP) in place. The risk management measures, as well as the overall risk assessment and characterization of the dam, are currently not specified in the available data.

Water resource and climate enthusiasts interested in Western Mobile Lake 4 can delve into the specifics of its design, construction, and regulatory oversight. The dam has not been modified in recent years, and its inspection frequency is set at 6 times per year. While the dam is state-regulated and undergoes regular inspections, more information is needed to fully assess its condition and potential risks. Further research and monitoring may be necessary to ensure the safety and integrity of Western Mobile Lake 4 for the surrounding community and environment.