Pettit Reservoir is an earth dam located in Marion County, Oregon, built in 1963. It carries a Significant hazard potential classification.
Dam profile
NID height · 26 ft26 ft tall and 850 ft long, taller than 55% 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 Pettit Reservoir
Pettit Reservoir is a dam in Marion, Oregon. The dam is owned by Dr. Virgil E. Pettit (private). It impounds the Brush Creek near Aurora.
The dam stands 26 feet tall and stretches 850 feet across, creates a reservoir covering 19 acres, has a maximum storage capacity of 290 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1963, 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 12/02/2019.
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Location
| State | Oregon |
| County | Marion |
| Nearest City | Aurora |
| River/Stream | Brush Creek |
| Coordinates | 44.99170, -122.79923 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 26 ft |
| Dam Height | 24 ft |
| Dam Length | 850 ft |
| Year Completed | 1963 (63 years old) |
Storage & Hydraulics
| NID Storage | 290 acre-ft |
| Max Storage | 290 acre-ft |
| Normal Storage | 223 acre-ft |
| Surface Area | 19 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 1,030 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Other |
| Owner | Dr. Virgil E. Pettit |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 12/02/2019 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | OR00396 |
| Federal ID | OR00396 |
| More Info | State Dam Safety Program |