Fordyce Tepee No. 1 is an earth dam located in Sheridan County, Wyoming, built in 1964. It carries a Low hazard potential classification.
Dam profile
NID height · 25 ft25 ft tall and 360 ft long, taller than 50% of U.S. dams with a recorded height. 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 Fordyce Tepee No. 1
The primary purpose of Fordyce Tepee 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 T P Association Inc. C/o John M. Pradere (private). It impounds the Tepee Creek near Big Horn.
The dam stands 25 feet tall and stretches 360 feet across, creates a reservoir covering 9 acres, has a maximum storage capacity of 120 acre-feet, and collects water from a drainage area of 5 square miles. Completed in 1964, 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. The most recent inspection on record was 08/20/2025.
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Location
| State | Wyoming |
| County | Sheridan |
| Nearest City | Big Horn |
| River/Stream | Tepee Creek |
| Coordinates | 44.61230, -107.12210 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 25 ft |
| Dam Height | 25 ft |
| Dam Length | 360 ft |
| Year Completed | 1964 (62 years old) |
Storage & Hydraulics
| NID Storage | 120 acre-ft |
| Max Storage | 120 acre-ft |
| Normal Storage | 70 acre-ft |
| Surface Area | 9 acres |
| Drainage Area | 5 sq mi |
| Max Discharge | 710 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | T P Association Inc. C/o John M. Pradere |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 08/20/2025 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY00565 |
| Federal ID | WY00565 |
| More Info | State Dam Safety Program |