Morning Star, also known as Big Reservoir, is a privately owned dam located in Folsom, California. Built in 1870, this earth dam stands at a height of 44 feet and has a storage capacity of 1405.4 acre-feet, primarily used for water supply. The dam sits on North Forbes Creek and is regulated by the California Department of Water Resources (DWR) for safety and inspections.

Despite its age, Morning Star has been assessed as being in satisfactory condition with a low hazard potential. The dam has a spillway type and width not specified in the data, but it has undergone regular inspections, with the last one conducted in April 2020. The surrounding area offers recreational opportunities, and the dam serves multiple purposes including tailings management in addition to water supply.

Managed by a private entity, Morning Star plays a crucial role in water resource management in Placer County, California. Its historical significance and continued operation highlight the importance of maintaining and regulating dams for both water supply and recreational purposes in the face of changing climate conditions.