Hagmaier South
Hagmaier South is an earth dam located in Marin County, California, built in 1944. It carries a Significant hazard potential classification.
About Hagmaier South
Hagmaier South is a dam in Marin, California. The dam is owned by Doi Nps (federal). It impounds the Olema Creek near Olema, Ca.
The dam stands 25 feet tall, creates a reservoir covering 2 acres, has a maximum storage capacity of 18 acre-feet, and collects water from a drainage area of 150 square miles. Completed in 1944, the structure is well-established, with more than 75 years of service.
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. An emergency action plan is in place for this dam. The most recent inspection on record was 12/07/2022.
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Location
| State | California |
| County | Marin |
| Nearest City | Olema, Ca |
| River/Stream | Olema Creek |
| Coordinates | 37.97386, -122.72700 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 25 ft |
| Dam Height | 25 ft |
| Year Completed | 1944 (82 years old) |
Storage & Hydraulics
| NID Storage | 18 acre-ft |
| Max Storage | 18 acre-ft |
| Normal Storage | 12 acre-ft |
| Surface Area | 2 acres |
| Drainage Area | 150 sq mi |
Ownership & Safety
| Owner | DOI NPS |
| Owner Type | Federal |
| Hazard Classification | Significant |
| Condition Assessment | Not Available |
| Last Inspection | 12/07/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CA10247 |
| Federal ID | CA10247 |
| More Info | State Dam Safety Program |