Plat I
Plat I is an earth dam located in Douglas County, Oregon, built in 1967. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Plat I
The primary purpose of Plat I is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Sutherlin Water Control District (local government). It impounds the Sutherlin Creek near Sutherlin.
The dam stands 30 feet tall and stretches 1,236 feet across, creates a reservoir covering 155 acres, has a maximum storage capacity of 2,760 acre-feet, and collects water from a drainage area of 9 square miles. Completed in 1967, the structure is well into its service life at over 50 years old.
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 satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 10/14/2020.
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 Oregon 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 | Oregon |
| County | Douglas |
| Nearest City | Sutherlin |
| River/Stream | Sutherlin Creek |
| Coordinates | 43.39345, -123.25441 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 30 ft |
| Dam Height | 28 ft |
| Dam Length | 1,236 ft |
| Year Completed | 1967 (59 years old) |
Storage & Hydraulics
| NID Storage | 2,760 acre-ft |
| Max Storage | 2,760 acre-ft |
| Normal Storage | 870 acre-ft |
| Surface Area | 155 acres |
| Drainage Area | 9 sq mi |
| Max Discharge | 770 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | SUTHERLIN WATER CONTROL DISTRICT |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 10/14/2020 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | OR00443 |
| Federal ID | OR00443 |
| More Info | State Dam Safety Program |