Geiger
Geiger is an earth dam located in Niobrara County, Wyoming, built in 1952. It carries a Low hazard potential classification and has a poor condition assessment.
About Geiger
The primary purpose of Geiger is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Stanley B. Rennard (private). It impounds the Chapman Draw near Edgemont, Sd.
The dam stands 32 feet tall and stretches 709 feet across, creates a reservoir covering 39 acres, and has a maximum storage capacity of 544 acre-feet. Completed in 1952, 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 10/19/2022.
At 32 feet, this dam is taller than 76% of dams nationwide.
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Location
| State | Wyoming |
| County | Niobrara |
| Nearest City | Edgemont, Sd |
| River/Stream | Chapman Draw |
| Coordinates | 43.33380, -104.16370 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 32 ft |
| Dam Height | 32 ft |
| Dam Length | 709 ft |
| Year Completed | 1952 (74 years old) |
Storage & Hydraulics
| NID Storage | 544 acre-ft |
| Max Storage | 544 acre-ft |
| Normal Storage | 310 acre-ft |
| Surface Area | 39 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | STANLEY B. RENNARD |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 10/19/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY00584 |
| Federal ID | WY00584 |
| More Info | State Dam Safety Program |