Patterson #1
Patterson #1 is an earth dam located in Delta County, Colorado, built in 1896. It carries a Low hazard potential classification and has a unsatisfactory condition assessment.
About Patterson #1
The primary purpose of Patterson #1 is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Leroux Creek Water Users Association (private). It impounds the Leroux Creek near Lazear.
The dam stands 16 feet tall and stretches 1,000 feet across, creates a reservoir covering 8 acres, and has a maximum storage capacity of 84 acre-feet. Completed in 1896, 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 unsatisfactory, indicating serious safety deficiencies exist that require immediate attention or remedial action. The most recent inspection on record was 06/27/2018.
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Location
| State | Colorado |
| County | Delta |
| Nearest City | Lazear |
| River/Stream | Leroux Creek |
| Coordinates | 38.96356, -107.74503 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 16 ft |
| Dam Height | 16 ft |
| Dam Length | 1,000 ft |
| Year Completed | 1896 (130 years old) |
Storage & Hydraulics
| NID Storage | 84 acre-ft |
| Max Storage | 84 acre-ft |
| Normal Storage | 52 acre-ft |
| Surface Area | 8 acres |
| Max Discharge | 210 cfs |
| Spillway Type | None |
Ownership & Safety
| Purpose | Irrigation |
| Owner | LEROUX CREEK WATER USERS ASSOCIATION |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Unsatisfactory |
| Last Inspection | 06/27/2018 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | CO00921 |
| Federal ID | CO00921 |
| More Info | State Dam Safety Program |