Steffenson No. 2
Steffenson No. 2 is an earth dam located in Johnson County, Wyoming, built in 1971. It carries a Low hazard potential classification and has a poor condition assessment.
About Steffenson No. 2
The primary purpose of Steffenson No. 2 is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by James R. Purdy Revocable Trust (private). It impounds the Billy Creek near Arvada.
The dam stands 41 feet tall and stretches 930 feet across, creates a reservoir covering 10 acres, and has a maximum storage capacity of 182 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 poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 08/12/2024.
At 41 feet, this dam is taller than 88% 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 | Johnson |
| Nearest City | Arvada |
| River/Stream | Billy Creek |
| Coordinates | 44.11639, -106.75389 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 41 ft |
| Dam Height | 41 ft |
| Dam Length | 930 ft |
| Year Completed | 1971 (55 years old) |
Storage & Hydraulics
| NID Storage | 182 acre-ft |
| Max Storage | 182 acre-ft |
| Normal Storage | 123 acre-ft |
| Surface Area | 10 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | JAMES R. PURDY REVOCABLE TRUST |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 08/12/2024 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY00764 |
| Federal ID | WY00764 |
| More Info | State Dam Safety Program |