Rissler
Rissler is an earth dam located in Natrona County, Wyoming, built in 1951. It carries a Low hazard potential classification and has a fair condition assessment.
About Rissler
The primary purpose of Rissler is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Falls Ranch C/o Rich Mason (private). It impounds the Trout Canyon Creek Offstream near Douglas.
The dam stands 28 feet tall and stretches 458 feet across, creates a reservoir covering 17 acres, and has a maximum storage capacity of 203 acre-feet. Completed in 1951, 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 06/17/2025.
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Location
| State | Wyoming |
| County | Natrona |
| Nearest City | Douglas |
| River/Stream | Trout Canyon Creek Offstream |
| Coordinates | 42.68790, -106.11090 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 28 ft |
| Dam Height | 28 ft |
| Dam Length | 458 ft |
| Year Completed | 1951 (75 years old) |
Storage & Hydraulics
| NID Storage | 203 acre-ft |
| Max Storage | 203 acre-ft |
| Normal Storage | 96 acre-ft |
| Surface Area | 17 acres |
| Max Discharge | 2,497 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | FALLS RANCH C/O RICH MASON |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 06/17/2025 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY00318 |
| Federal ID | WY00318 |
| More Info | State Dam Safety Program |