West Side No. 1
West Side No. 1 is an earth dam located in Converse County, Wyoming, built in 1967. It carries a Low hazard potential classification and has a poor condition assessment.
About West Side No. 1
The primary purpose of West Side 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 Laprele Irrigation District (private). It impounds the Alkali Creek Offstream near Douglas.
The dam stands 20 feet tall and stretches 194 feet across, creates a reservoir covering 8 acres, and has a maximum storage capacity of 110 acre-feet. 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 poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 05/10/2023.
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Location
| State | Wyoming |
| County | Converse |
| Nearest City | Douglas |
| River/Stream | Alkali Creek Offstream |
| Coordinates | 42.78556, -105.62861 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 194 ft |
| Year Completed | 1967 (59 years old) |
Storage & Hydraulics
| NID Storage | 110 acre-ft |
| Max Storage | 110 acre-ft |
| Normal Storage | 64 acre-ft |
| Surface Area | 8 acres |
| Max Discharge | 708 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | LAPRELE IRRIGATION DISTRICT |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 05/10/2023 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY00314 |
| Federal ID | WY00314 |
| More Info | State Dam Safety Program |