Divide Lake
Divide Lake is a rockfill dam located in Sublette County, Wyoming, built in 1954. It carries a Low hazard potential classification and has a fair condition assessment.
About Divide Lake
The primary purpose of Divide Lake is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Fish J Ranch, Llc (private). It impounds the Divide Creek near Boulder.
The dam stands 12 feet tall and stretches 150 feet across, creates a reservoir covering 133 acres, has a maximum storage capacity of 1,681 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1954, 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 fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. The most recent inspection on record was 07/15/2024.
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Location
| State | Wyoming |
| County | Sublette |
| Nearest City | Boulder |
| River/Stream | Divide Creek |
| Coordinates | 42.83472, -109.47833 |
Physical Characteristics
| Dam Type | Rockfill |
| NID Height | 12 ft |
| Dam Height | 12 ft |
| Dam Length | 150 ft |
| Year Completed | 1954 (72 years old) |
Storage & Hydraulics
| NID Storage | 1,681 acre-ft |
| Max Storage | 1,681 acre-ft |
| Normal Storage | 1,027 acre-ft |
| Surface Area | 133 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | FISH J RANCH, LLC |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 07/15/2024 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY01218 |
| Federal ID | WY01218 |
| More Info | State Dam Safety Program |