Miller #1 - Second Enlargement
Miller #1 - Second Enlargement is an earth dam located in Big Horn County, Wyoming, built in 1972. It carries a Low hazard potential classification and has a fair condition assessment.
About Miller #1 - Second Enlargement
The primary purpose of Miller #1 - Second Enlargement is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Gary T. & Vicki S. Wilkinson (private). It impounds the Carrol Draw near Unnamed Ranch.
The dam stands 39 feet tall and stretches 791 feet across, creates a reservoir covering 17 acres, has a maximum storage capacity of 315 acre-feet, and collects water from a drainage area of 4 square miles. Completed in 1972, 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 08/31/2022.
At 39 feet, this dam is taller than 86% of dams nationwide.
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Location
| State | Wyoming |
| County | Big Horn |
| Nearest City | Unnamed Ranch |
| River/Stream | Carrol Draw |
| Coordinates | 44.68910, -107.81280 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 39 ft |
| Dam Height | 34 ft |
| Dam Length | 791 ft |
| Year Completed | 1972 (54 years old) |
Storage & Hydraulics
| NID Storage | 315 acre-ft |
| Max Storage | 315 acre-ft |
| Normal Storage | 182 acre-ft |
| Surface Area | 17 acres |
| Drainage Area | 4 sq mi |
| Max Discharge | 150 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | GARY T. & VICKI S. WILKINSON |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 08/31/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY02292 |
| Federal ID | WY02292 |
| More Info | State Dam Safety Program |