Michigan Bar No. 1
Michigan Bar No. 1 is an earth dam located in Sacramento County, California, built in 1989. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Michigan Bar No. 1
The primary purpose of Michigan Bar No. 1 is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by Rancho Murieta Community Services District (public utility). It impounds the Tr Cosumnes Rv.
The dam stands 17 feet tall and stretches 1,900 feet across, creates a reservoir covering 34 acres, and has a maximum storage capacity of 814 acre-feet. Completed in 1989, the structure is 37 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 11/20/2025.
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Location
| State | California |
| County | Sacramento |
| River/Stream | Tr Cosumnes Rv |
| Coordinates | 38.48250, -121.08270 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 17 ft |
| Dam Height | 17 ft |
| Dam Length | 1,900 ft |
| Year Completed | 1989 (37 years old) |
Storage & Hydraulics
| NID Storage | 814 acre-ft |
| Max Storage | 814 acre-ft |
| Surface Area | 34 acres |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Rancho Murieta Community Services District |
| Owner Type | Public Utility |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 11/20/2025 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CA01243 |
| Federal ID | CA01243 |
| More Info | State Dam Safety Program |