Lance Creek No. 1 is an earth dam located in Niobrara County, Wyoming, built in 1965. It carries a Low hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 26 ft26 ft tall and 632 ft long, taller than 55% 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 Lance Creek No. 1
The primary purpose of Lance Creek No. 1 is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Joss Limited Partnership (private). It impounds the Lance Creek near Lance Creek Oil Field.
The dam stands 26 feet tall and stretches 632 feet across, creates a reservoir covering 13 acres, and has a maximum storage capacity of 195 acre-feet. Completed in 1965, 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 05/03/2023.
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Location
| State | Wyoming |
| County | Niobrara |
| Nearest City | Lance Creek Oil Field |
| River/Stream | Lance Creek |
| Coordinates | 42.83639, -104.76333 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 26 ft |
| Dam Height | 26 ft |
| Dam Length | 632 ft |
| Year Completed | 1965 (61 years old) |
Storage & Hydraulics
| NID Storage | 195 acre-ft |
| Max Storage | 195 acre-ft |
| Normal Storage | 118 acre-ft |
| Surface Area | 13 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Joss Limited Partnership |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 05/03/2023 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY00747 |
| Federal ID | WY00747 |
| More Info | State Dam Safety Program |