J. N. Mertz
J. N. Mertz is an earth dam located in Platte County, Wyoming, built in 1903. It carries a Low hazard potential classification and has a poor condition assessment.
About J. N. Mertz
The primary purpose of J. N. Mertz is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Old Home Llc (private). It impounds the Laramie River Offstream near Torrington.
The dam stands 13 feet tall and stretches 1,590 feet across, creates a reservoir covering 20 acres, and has a maximum storage capacity of 156 acre-feet. Completed in 1903, the structure is over a century 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 03/28/2022.
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Location
| State | Wyoming |
| County | Platte |
| Nearest City | Torrington |
| River/Stream | Laramie River Offstream |
| Coordinates | 42.03320, -105.19550 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 13 ft |
| Dam Height | 13 ft |
| Dam Length | 1,590 ft |
| Year Completed | 1903 (123 years old) |
Storage & Hydraulics
| NID Storage | 156 acre-ft |
| Max Storage | 156 acre-ft |
| Normal Storage | 156 acre-ft |
| Surface Area | 20 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | OLD HOME LLC |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 03/28/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY00027 |
| Federal ID | WY00027 |
| More Info | State Dam Safety Program |