Day Reservoir
Day Reservoir is an earth dam located in Clackamas County, Oregon, built in 1971. It carries a Significant hazard potential classification.
About Day Reservoir
The primary purpose of Day Reservoir is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by William Day (private). It impounds the Milk Creek near Mulino.
The dam stands 26 feet tall and stretches 290 feet across, creates a reservoir covering 1 acres, has a maximum storage capacity of 12 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1971, 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 11/28/2018.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Oregon |
| County | Clackamas |
| Nearest City | Mulino |
| River/Stream | Milk Creek |
| Coordinates | 45.23685, -122.57864 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 26 ft |
| Dam Height | 26 ft |
| Dam Length | 290 ft |
| Year Completed | 1971 (55 years old) |
Storage & Hydraulics
| NID Storage | 12 acre-ft |
| Max Storage | 12 acre-ft |
| Normal Storage | 12 acre-ft |
| Surface Area | 1 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 48 cfs |
Ownership & Safety
| Purpose | Irrigation |
| Owner | WILLIAM DAY |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not Rated |
| Last Inspection | 11/28/2018 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | OR03411 |
| Federal ID | OR03411 |
| More Info | State Dam Safety Program |