Judy Reservoir Dam A
Judy Reservoir Dam A is an earth dam located in Skagit County, Washington, built in 1946. It carries a High hazard potential classification and has a fair condition assessment.
About Judy Reservoir Dam A
The primary purpose of Judy Reservoir Dam A 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 Skagit Cnty Pud No 1 (public utility). It impounds the Tr-skagit River near Clear Lake.
The dam stands 61 feet tall and stretches 687 feet across, creates a reservoir covering 140 acres, has a maximum storage capacity of 5,100 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1946, the structure is well-established, with more than 75 years of service.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 08/08/2023.
At 61 feet, this dam is taller than 95% of all dams in the United States.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Washington dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Washington |
| County | Skagit |
| Nearest City | Clear Lake |
| River/Stream | Tr-skagit River |
| Coordinates | 48.47109, -122.18913 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 61 ft |
| Dam Length | 687 ft |
| Year Completed | 1946 (80 years old) |
Storage & Hydraulics
| NID Storage | 5,100 acre-ft |
| Max Storage | 5,100 acre-ft |
| Normal Storage | 4,420 acre-ft |
| Surface Area | 140 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 58 cfs |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Skagit Cnty PUD No 1 |
| Owner Type | Public Utility |
| Hazard Classification | High |
| Condition Assessment | Fair |
| Last Inspection | 08/08/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | WA00183 |
| Federal ID | WA00181S001 |
| More Info | State Dam Safety Program |