Six Mile is an earth dam located in Natrona County, Wyoming, built in 1951. It carries a Low hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 41 ft41 ft tall and 418 ft long, taller than 87% 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 Six Mile
The primary purpose of Six Mile is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Usdi BLM (private). It impounds the Six Mile Creek near Arvada.
The dam stands 41 feet tall and stretches 418 feet across, creates a reservoir covering 16 acres, and has a maximum storage capacity of 289 acre-feet. Completed in 1951, 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 poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 08/12/2021.
At 41 feet, this dam is taller than 87% of dams nationwide.
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Location
| State | Wyoming |
| County | Natrona |
| Nearest City | Arvada |
| River/Stream | Six Mile Creek |
| Coordinates | 42.83820, -107.31530 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 41 ft |
| Dam Height | 40 ft |
| Dam Length | 418 ft |
| Year Completed | 1951 (75 years old) |
Storage & Hydraulics
| NID Storage | 289 acre-ft |
| Max Storage | 289 acre-ft |
| Normal Storage | 200 acre-ft |
| Surface Area | 16 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Usdi BLM |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 08/12/2021 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY00995 |
| Federal ID | WY00995 |
| More Info | State Dam Safety Program |