Snoqualmie Mill Pond Dam

Snoqualmie Mill Pond Dam is an other dam located in King County, Washington, built in 1917. It carries a Low hazard potential classification.

About Snoqualmie Mill Pond Dam

The primary purpose of Snoqualmie Mill Pond Dam is fish and wildlife pond. The dam creates habitat for fish and wildlife, supporting local ecosystems and potentially serving conservation goals. The dam is owned by Weyerhaeuser (private). It impounds the Tr-snoqualmie River near Snoqualmie.

The dam stands 10 feet tall and stretches 3,000 feet across, creates a reservoir covering 66 acres, has a maximum storage capacity of 396 acre-feet, and collects water from a drainage area of 375 square miles. Completed in 1917, the structure is over a century 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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Low Hazard ConditionEmergency Action Plan: Not Required

Location

StateWashington
CountyKing
Nearest CitySnoqualmie
River/StreamTr-snoqualmie River
Coordinates47.52934, -121.81931

Physical Characteristics

Dam TypeOther
NID Height10 ft
Dam Length3,000 ft
Year Completed1917 (109 years old)

Storage & Hydraulics

NID Storage396 acre-ft
Max Storage396 acre-ft
Normal Storage330 acre-ft
Surface Area66 acres
Drainage Area375 sq mi
Max Discharge45 cfs

Ownership & Safety

PurposeFish and Wildlife Pond
OwnerWeyerhaeuser
Owner TypePrivate
Hazard ClassificationLow
Emergency Action PlanNot Required

Identifiers

NID IDWA00307
Federal IDWA00307
More InfoState Dam Safety Program

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