Mallard #1
Mallard #1 is an earth dam located in Johnson County, Wyoming, built in 1999. It carries a Low hazard potential classification and has a fair condition assessment.
About Mallard #1
The primary purpose of Mallard #1 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 Usdi Blm (federal). It impounds the Sackett Draw near Hwy 191.
The dam stands 26 feet tall and stretches 260 feet across, creates a reservoir covering 4 acres, has a maximum storage capacity of 56 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1999, the structure is 27 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 06/30/2022.
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Location
| State | Wyoming |
| County | Johnson |
| Nearest City | Hwy 191 |
| River/Stream | Sackett Draw |
| Coordinates | 43.84390, -106.77940 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 26 ft |
| Dam Height | 23 ft |
| Dam Length | 260 ft |
| Year Completed | 1999 (27 years old) |
Storage & Hydraulics
| NID Storage | 56 acre-ft |
| Max Storage | 56 acre-ft |
| Normal Storage | 17 acre-ft |
| Surface Area | 4 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 1,162 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | USDI BLM |
| Owner Type | Federal |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 06/30/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY02356 |
| Federal ID | WY02356 |
| More Info | State Dam Safety Program |