Marsh Creek
High HazardSatisfactory ConditionEmergency Action Plan: Yes
Location
| County | Contra Costa |
| Nearest City | Brentwood |
| River/Stream | Marsh Creek |
| Coordinates | 37.88830, -121.72160 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 59 ft |
| Dam Height | 59 ft |
| Dam Length | 1,540 ft |
| Year Completed | 1963 (63 years old) |
Storage & Hydraulics
| NID Storage | 4,425 acre-ft |
| Max Storage | 4,425 acre-ft |
| Surface Area | 335 acres |
| Drainage Area | 52 sq mi |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Contra Costa County Flood Control and Water Conservation District |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 01/07/2026 |
| Emergency Action Plan | Yes |