Mallard Marsh Dam is an earth dam located in Pend Oreille County, Washington, built in 1960. It carries a Low hazard potential classification.
Dam profile
NID height · 8 ft8 ft tall and 350 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 Mallard Marsh Dam
The primary purpose of Mallard Marsh Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Little Diamond Campground (private).
The dam stands 8 feet tall and stretches 350 feet across, creates a reservoir covering 40 acres, and has a maximum storage capacity of 250 acre-feet. Completed in 1960, 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.
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Location
| State | Washington |
| County | Pend Oreille |
| Coordinates | 48.14800, -117.22201 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 8 ft |
| Dam Length | 350 ft |
| Year Completed | 1960 (66 years old) |
Storage & Hydraulics
| NID Storage | 250 acre-ft |
| Max Storage | 250 acre-ft |
| Normal Storage | 168 acre-ft |
| Surface Area | 40 acres |
| Max Discharge | 22 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Little Diamond Campground |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WA00721 |
| Federal ID | WA00721 |
| More Info | State Dam Safety Program |