Lewis, Alfred Dam is an earth dam located in Washington County, Oregon, built in 1967. It carries a Low hazard potential classification.
Dam profile
NID height · 20 ft20 ft tall and 755 ft long. 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 Lewis, Alfred Dam
The primary purpose of Lewis, Alfred Dam is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Lewis Farms, Inc. (private). It impounds the Unnamed Trib Dairy Creek near No Downstream Settlement.
The dam stands 20 feet tall and stretches 755 feet across, creates a reservoir covering 8 acres, has a maximum storage capacity of 100 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1967, the structure is well into its service life at over 50 years old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. The most recent inspection on record was 11/04/2010. That was over 15 years ago.
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Location
| State | Oregon |
| County | Washington |
| Nearest City | No Downstream Settlement |
| River/Stream | Unnamed Trib Dairy Creek |
| Coordinates | 45.59596, -123.15462 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 755 ft |
| Year Completed | 1967 (59 years old) |
Storage & Hydraulics
| NID Storage | 100 acre-ft |
| Max Storage | 100 acre-ft |
| Normal Storage | 48 acre-ft |
| Surface Area | 8 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 131 cfs |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Lewis Farms, Inc. |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 11/04/2010 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | OR00938 |
| Federal ID | OR00938 |
| More Info | State Dam Safety Program |