Raw Water Reservoir is an earth dam located in Sweetwater County, Wyoming, built in 2022. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 42 ft42 ft tall and 3,600 ft long, taller than 88% 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 Raw Water Reservoir
The primary purpose of Raw Water Reservoir is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by Sweetwater County Joint Powers Water Board (public utility). It impounds the Telephone Canyon Draw near Green River.
The dam stands 42 feet tall and stretches 3,600 feet across, creates a reservoir covering 14 acres, has a maximum storage capacity of 428 acre-feet, and collects water from a drainage area of 13 square miles. Completed in 2022, 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. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 06/28/2022.
At 42 feet, this dam is taller than 88% of dams nationwide.
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Location
| State | Wyoming |
| County | Sweetwater |
| Nearest City | Green River |
| River/Stream | Telephone Canyon Draw |
| Coordinates | 41.52640, -109.48310 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 42 ft |
| Dam Height | 38 ft |
| Dam Length | 3,600 ft |
| Year Completed | 2022 (4 years old) |
Storage & Hydraulics
| NID Storage | 428 acre-ft |
| Max Storage | 428 acre-ft |
| Normal Storage | 350 acre-ft |
| Surface Area | 14 acres |
| Drainage Area | 13 sq mi |
| Max Discharge | 37 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Sweetwater County Joint Powers Water Board |
| Owner Type | Public Utility |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 06/28/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY02920 |
| Federal ID | WY02920 |
| More Info | State Dam Safety Program |