Tualatin Park
Tualatin Park is an earth dam located in Washington County, Oregon, built in 1970. It carries a Significant hazard potential classification.
About Tualatin Park
The primary purpose of Tualatin Park is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Tri County Industrial Parks (private). It impounds the Tualatin River, Trib To near Nasoma.
The dam stands 23 feet tall and stretches 300 feet across, creates a reservoir covering 4 acres, has a maximum storage capacity of 28 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1970, 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. The most recent inspection on record was 11/15/2019.
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Location
| State | Oregon |
| County | Washington |
| Nearest City | Nasoma |
| River/Stream | Tualatin River, Trib To |
| Coordinates | 45.36865, -122.78907 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 23 ft |
| Dam Height | 22 ft |
| Dam Length | 300 ft |
| Year Completed | 1970 (56 years old) |
Storage & Hydraulics
| NID Storage | 28 acre-ft |
| Max Storage | 28 acre-ft |
| Normal Storage | 27 acre-ft |
| Surface Area | 4 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 111 cfs |
Ownership & Safety
| Purpose | Irrigation |
| Owner | TRI COUNTY INDUSTRIAL PARKS |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not Rated |
| Last Inspection | 11/15/2019 |
| Emergency Action Plan | No |
Identifiers
| NID ID | OR03317 |
| Federal ID | OR03317 |
| More Info | State Dam Safety Program |