Jack Dam
Jack Dam is a gravity dam located in Natrona County, Wyoming, built in 1971. It carries a Low hazard potential classification and has a unsatisfactory condition assessment.
About Jack Dam
The primary purpose of Jack Dam is debris control. The dam is designed to catch sediment, rocks, and debris carried by flowing water — particularly important in areas prone to mudslides or heavy erosion. The dam is owned by Doi Blm (federal). It impounds the Austin Draw.
The dam stands 35 feet tall and stretches 345 feet across, creates a reservoir covering 14 acres, and has a maximum storage capacity of 339 acre-feet. Completed in 1971, 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. Its condition is rated unsatisfactory, indicating serious safety deficiencies exist that require immediate attention or remedial action. The most recent inspection on record was 07/22/2017.
At 35 feet, this dam is taller than 82% of dams nationwide.
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Location
| State | Wyoming |
| County | Natrona |
| River/Stream | Austin Draw |
| Coordinates | 43.25727, -106.58737 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 35 ft |
| Dam Length | 345 ft |
| Year Completed | 1971 (55 years old) |
Storage & Hydraulics
| NID Storage | 339 acre-ft |
| Max Storage | 339 acre-ft |
| Normal Storage | 31 acre-ft |
| Surface Area | 14 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Debris Control |
| Owner | DOI BLM |
| Owner Type | Federal |
| Hazard Classification | Low |
| Condition Assessment | Unsatisfactory |
| Last Inspection | 07/22/2017 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY01455 |
| Federal ID | WY01455 |
| More Info | State Dam Safety Program |