Dry Wash No. 2 is an earth dam located in San Juan County, Utah, built in 1962. It carries a Significant hazard potential classification.
Dam profile
NID height · 68 ft68 ft tall and 1,685 ft long, taller than 96% 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 Dry Wash No. 2
The primary purpose of Dry Wash No. 2 is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by San Juan Co. Water Conservancy District (private). It impounds the Johnson Creek near Blanding.
The dam stands 68 feet tall and stretches 1,685 feet across, has a maximum storage capacity of 660 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1962, the structure is well into its service life at over 50 years old.
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. An emergency action plan is in place for this dam. The most recent inspection on record was 09/28/2023.
At 68 feet, this dam is taller than 96% of all dams in the United States.
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Location
| State | Utah |
| County | San Juan |
| Nearest City | Blanding |
| River/Stream | Johnson Creek |
| Coordinates | 37.77641, -109.53838 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 68 ft |
| Dam Length | 1,685 ft |
| Year Completed | 1962 (64 years old) |
Storage & Hydraulics
| NID Storage | 660 acre-ft |
| Max Storage | 660 acre-ft |
| Normal Storage | 518 acre-ft |
| Drainage Area | 0 sq mi |
| Max Discharge | 72 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | San Juan Co. Water Conservancy District |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 09/28/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | UT00094 |
| Federal ID | UT00094 |
| More Info | State Dam Safety Program |