Desiltation Project 73-2 is an earth dam located in Nobles County, Minnesota, built in 1977. It carries a Low hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 13 ft13 ft tall and 500 ft long. 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 Desiltation Project 73-2
The primary purpose of Desiltation Project 73-2 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 Wd of Heron Lake (local government). It impounds the Jack Creek-tr near Heron Lake.
The dam stands 13 feet tall and stretches 500 feet across, has a maximum storage capacity of 60 acre-feet, and collects water from a drainage area of 8 square miles. Completed in 1977, the structure is 49 years old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. The most recent inspection on record was 11/15/2018.
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Location
| State | Minnesota |
| County | Nobles |
| Nearest City | Heron Lake |
| River/Stream | Jack Creek-tr |
| Coordinates | 43.80471, -95.63658 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 13 ft |
| Dam Height | 8 ft |
| Dam Length | 500 ft |
| Year Completed | 1977 (49 years old) |
Storage & Hydraulics
| NID Storage | 60 acre-ft |
| Max Storage | 60 acre-ft |
| Normal Storage | 25 acre-ft |
| Drainage Area | 8 sq mi |
| Max Discharge | 1,350 cfs |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Wd of Heron Lake |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 11/15/2018 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MN00732 |
| Federal ID | MN00732 |
| More Info | State Dam Safety Program |