Knott Retention Reservoir is an earth dam located in Redwood County, Minnesota, built in 1974. It carries a Low hazard potential classification.
Dam profile
NID height · 32 ft32 ft tall and 395 ft long, taller than 74% 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 Knott Retention Reservoir
The primary purpose of Knott Retention Reservoir is fire protection, stock, or small fish pond. The dam maintains a small impoundment used for fire suppression, livestock watering, or as a fish pond. The dam is owned by Knott, Duane (private). It impounds the Cottonwood River-tr near Lamberton.
The dam stands 32 feet tall and stretches 395 feet across, has a maximum storage capacity of 55 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1974, the structure is well into its service life at over 50 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. The most recent inspection on record was 08/01/2024.
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Location
| State | Minnesota |
| County | Redwood |
| Nearest City | Lamberton |
| River/Stream | Cottonwood River-tr |
| Coordinates | 44.27997, -95.39327 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 32 ft |
| Dam Height | 32 ft |
| Dam Length | 395 ft |
| Year Completed | 1974 (52 years old) |
Storage & Hydraulics
| NID Storage | 55 acre-ft |
| Max Storage | 55 acre-ft |
| Normal Storage | 26 acre-ft |
| Drainage Area | 0 sq mi |
| Max Discharge | 88 cfs |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Knott, Duane |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 08/01/2024 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MN00848 |
| Federal ID | MN00848 |
| More Info | State Dam Safety Program |