Shell Refinery Water Storage Reservoir is an earth dam located in Skagit County, Washington, built in 1958. It carries a Low hazard potential classification.
Dam profile
NID height · 28 ft28 ft tall, taller than 62% 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 Shell Refinery Water Storage Reservoir
The primary purpose of Shell Refinery Water Storage Reservoir is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by Hf Sinclair (private). It impounds the Offstream.
The dam stands 28 feet tall, creates a reservoir covering 5 acres, has a maximum storage capacity of 37 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1958, 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.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Washington |
| County | Skagit |
| River/Stream | Offstream |
| Coordinates | 48.47756, -122.56000 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 28 ft |
| Year Completed | 1958 (68 years old) |
Storage & Hydraulics
| NID Storage | 37 acre-ft |
| Max Storage | 37 acre-ft |
| Normal Storage | 25 acre-ft |
| Surface Area | 5 acres |
| Drainage Area | 0 sq mi |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Hf Sinclair |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WA01969 |
| Federal ID | WA01969 |
| More Info | State Dam Safety Program |