Lower Morgan is an earth dam located in Campbell County, Wyoming, built in 2001. It carries a Significant hazard potential classification.
Dam profile
NID height · 88 ft88 ft tall and 839 ft long, taller than 97% of U.S. dams with a recorded height. Height is drawn to scale against a ten-story building, about 100 ft; the profile is a generic embankment section and the water level is illustrative.
About Lower Morgan
The primary purpose of Lower Morgan is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Elizabeth G. Rice Revocable Trust & John William Mankin Revocable Trust (private). It impounds the Morgan Draw near 1-90.
The dam stands 88 feet tall and stretches 839 feet across, creates a reservoir covering 12 acres, has a maximum storage capacity of 338 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 2001, the structure is relatively new.
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. The most recent inspection on record was 04/27/2021.
At 88 feet, this dam is taller than 97% of all dams in the United States.
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Location
| State | Wyoming |
| County | Campbell |
| Nearest City | 1-90 |
| River/Stream | Morgan Draw |
| Coordinates | 44.14290, -105.97930 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 88 ft |
| Dam Height | 70 ft |
| Dam Length | 839 ft |
| Year Completed | 2001 (25 years old) |
Storage & Hydraulics
| NID Storage | 338 acre-ft |
| Max Storage | 338 acre-ft |
| Normal Storage | 227 acre-ft |
| Surface Area | 12 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 2,940 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Elizabeth G. Rice Revocable Trust & John William Mankin Revocable Trust |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 04/27/2021 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY02297 |
| Federal ID | WY02297 |
| More Info | State Dam Safety Program |