Summit Lake Dam is an earth dam located in Thurston County, Washington, built in 1955. It carries a Low hazard potential classification.
Dam profile
NID height · 7 ft7 ft tall and 90 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 Summit Lake Dam
The primary purpose of Summit Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Boy Scouts of America (private). It impounds the Kennedy Creek.
The dam stands 7 feet tall and stretches 90 feet across, creates a reservoir covering 130 acres, and has a maximum storage capacity of 1,570 acre-feet. Completed in 1955, 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 05/07/1998. That was over 28 years ago.
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Location
| State | Washington |
| County | Thurston |
| River/Stream | Kennedy Creek |
| Coordinates | 47.05272, -123.12434 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 7 ft |
| Dam Length | 90 ft |
| Year Completed | 1955 (71 years old) |
Storage & Hydraulics
| NID Storage | 1,570 acre-ft |
| Max Storage | 1,570 acre-ft |
| Normal Storage | 1,570 acre-ft |
| Surface Area | 130 acres |
Ownership & Safety
| Purpose | Recreation |
| Owner | Boy Scouts of America |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 05/07/1998 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WA01144 |
| Federal ID | WA01144 |
| More Info | State Dam Safety Program |