Wyoming Development Company No. 1
Wyoming Development Company No. 1 is an earth dam located in Platte County, Wyoming, built in 1960. It carries a Significant hazard potential classification and has a fair condition assessment.
About Wyoming Development Company No. 1
The primary purpose of Wyoming Development Company No. 1 is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Wheatland Irrigation District (private). It impounds the Sybille Creek Offstream near Wheatland.
The dam stands 49 feet tall and stretches 6,600 feet across, creates a reservoir covering 424 acres, has a maximum storage capacity of 11,590 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1960, the structure is well into its service life at over 50 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in 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 03/28/2022.
At 49 feet, this dam is taller than 92% of dams nationwide.
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Location
| State | Wyoming |
| County | Platte |
| Nearest City | Wheatland |
| River/Stream | Sybille Creek Offstream |
| Coordinates | 42.00030, -105.04530 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 49 ft |
| Dam Height | 45 ft |
| Dam Length | 6,600 ft |
| Year Completed | 1960 (66 years old) |
Storage & Hydraulics
| NID Storage | 11,590 acre-ft |
| Max Storage | 11,590 acre-ft |
| Normal Storage | 9,370 acre-ft |
| Surface Area | 424 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 400 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | WHEATLAND IRRIGATION DISTRICT |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 03/28/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY00091 |
| Federal ID | WY00091 |
| More Info | State Dam Safety Program |