Dean Springs Dam is a gravity dam located in Natrona County, Wyoming, built in 1963. It carries a Low hazard potential classification and has a unsatisfactory condition assessment.
Dam profile
NID height · 30 ft30 ft tall and 587 ft long, taller than 68% 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 concrete gravity section and the water level is illustrative.
About Dean Springs Dam
The primary purpose of Dean Springs Dam is debris control. The dam is designed to catch sediment, rocks, and debris carried by flowing water — particularly important in areas prone to mudslides or heavy erosion. The dam is owned by Doi BLM (federal). It impounds the Dean Springs Draw.
The dam stands 30 feet tall and stretches 587 feet across, creates a reservoir covering 6 acres, has a maximum storage capacity of 18 acre-feet, and collects water from a drainage area of 4 square miles. Completed in 1963, 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 unsatisfactory, indicating serious safety deficiencies exist that require immediate attention or remedial action. The most recent inspection on record was 07/21/2017.
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Location
| State | Wyoming |
| County | Natrona |
| River/Stream | Dean Springs Draw |
| Coordinates | 43.22194, -107.16384 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 30 ft |
| Dam Length | 587 ft |
| Year Completed | 1963 (63 years old) |
Storage & Hydraulics
| NID Storage | 18 acre-ft |
| Max Storage | 18 acre-ft |
| Normal Storage | 9 acre-ft |
| Surface Area | 6 acres |
| Drainage Area | 4 sq mi |
| Max Discharge | 863 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Debris Control |
| Owner | Doi BLM |
| Owner Type | Federal |
| Hazard Classification | Low |
| Condition Assessment | Unsatisfactory |
| Last Inspection | 07/21/2017 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY01445 |
| Federal ID | WY01445 |
| More Info | State Dam Safety Program |