30th Street Detention Basin is an earth dam located in Ward County, North Dakota. It carries a Significant hazard potential classification.
Dam profile
NID height · 27 ft27 ft tall, taller than 59% of U.S. dams with a recorded height. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About 30th Street Detention Basin
The primary purpose of 30th Street Detention Basin is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Ward County Wrb (local government). It impounds the Second Larson Coulee near Minot.
The dam stands 27 feet tall, creates a reservoir covering 0 acres, has a maximum storage capacity of 284 acre-feet, and collects water from a drainage area of 8 square miles.
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 09/08/2021.
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Location
| State | North Dakota |
| County | Ward |
| Nearest City | Minot |
| River/Stream | Second Larson Coulee |
| Coordinates | 48.15158, -101.34190 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 27 ft |
| Dam Height | 25 ft |
Storage & Hydraulics
| NID Storage | 284 acre-ft |
| Max Storage | 284 acre-ft |
| Surface Area | 0 acres |
| Drainage Area | 8 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Ward County Wrb |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 09/08/2021 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | ND01157 |
| Federal ID | ND01157 |
| More Info | State Dam Safety Program |