Blatt Lake is an earth dam located in Sublette County, Wyoming, built in 2001. It carries a Low hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 18 ft18 ft tall and 2,650 ft long. 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 Blatt Lake
The primary purpose of Blatt Lake is fish and wildlife pond. The dam creates habitat for fish and wildlife, supporting local ecosystems and potentially serving conservation goals. The dam is owned by Bar Cross LLC (private). It impounds the Willow Creek Offstream near Unnamed Ranch.
The dam stands 18 feet tall and stretches 2,650 feet across, creates a reservoir covering 35 acres, has a maximum storage capacity of 600 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 2001, the structure is relatively new.
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 07/19/2022.
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Location
| State | Wyoming |
| County | Sublette |
| Nearest City | Unnamed Ranch |
| River/Stream | Willow Creek Offstream |
| Coordinates | 42.99930, -109.94250 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 18 ft |
| Dam Height | 14 ft |
| Dam Length | 2,650 ft |
| Year Completed | 2001 (25 years old) |
Storage & Hydraulics
| NID Storage | 600 acre-ft |
| Max Storage | 600 acre-ft |
| Normal Storage | 149 acre-ft |
| Surface Area | 35 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 567 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fish and Wildlife Pond |
| Owner | Bar Cross LLC |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 07/19/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY02280 |
| Federal ID | WY02280 |
| More Info | State Dam Safety Program |