Lower Hackett Dam is a gravity dam located in Natrona County, Wyoming, built in 1967. It carries a Low hazard potential classification and has a unsatisfactory condition assessment.
Dam profile
NID height · 37 ft37 ft tall and 1,052 ft long, taller than 83% 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 concrete gravity section and the water level is illustrative.
About Lower Hackett Dam
The primary purpose of Lower Hackett 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 Hackett Creek.
The dam stands 37 feet tall and stretches 1,052 feet across, creates a reservoir covering 15 acres, has a maximum storage capacity of 171 acre-feet, and collects water from a drainage area of 10 square miles. Completed in 1967, 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 37 feet, this dam is taller than 83% of dams nationwide.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Wyoming |
| County | Natrona |
| River/Stream | Hackett Creek |
| Coordinates | 43.37355, -106.86831 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 37 ft |
| Dam Length | 1,052 ft |
| Year Completed | 1967 (59 years old) |
Storage & Hydraulics
| NID Storage | 171 acre-ft |
| Max Storage | 171 acre-ft |
| Normal Storage | 43 acre-ft |
| Surface Area | 15 acres |
| Drainage Area | 10 sq mi |
| Max Discharge | 838 cfs |
| 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 | WY01456 |
| Federal ID | WY01456 |
| More Info | State Dam Safety Program |