Rosean is an earth dam located in Weston County, Wyoming, built in 1955. It carries a Low hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 23 ft23 ft tall and 900 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Rosean
The primary purpose of Rosean is fire protection, stock, or small fish pond. The dam maintains a small impoundment used for fire suppression, livestock watering, or as a fish pond. The dam is owned by Agnes K. Morgan (private). It impounds the Rosean Draw near Newcastle.
The dam stands 23 feet tall and stretches 900 feet across, creates a reservoir covering 11 acres, and has a maximum storage capacity of 117 acre-feet. Completed in 1955, 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 10/19/2022.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Wyoming |
| County | Weston |
| Nearest City | Newcastle |
| River/Stream | Rosean Draw |
| Coordinates | 43.72610, -104.17260 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 23 ft |
| Dam Height | 23 ft |
| Dam Length | 900 ft |
| Year Completed | 1955 (71 years old) |
Storage & Hydraulics
| NID Storage | 117 acre-ft |
| Max Storage | 117 acre-ft |
| Normal Storage | 53 acre-ft |
| Surface Area | 11 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Agnes K. Morgan |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 10/19/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY00614 |
| Federal ID | WY00614 |
| More Info | State Dam Safety Program |