Quadrant East Campus Parcel 1

Quadrant East Campus Parcel 1 is an earth dam located in King County, Washington, built in 2000. It carries a Significant hazard potential classification and has a satisfactory condition assessment.

About Quadrant East Campus Parcel 1

The primary purpose of Quadrant East Campus Parcel 1 is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by East Campus Corporate Park C/o Kidder Mathews (private). It impounds the North Lake near Federal Way.

The dam stands 11 feet tall and stretches 380 feet across, creates a reservoir covering 14 acres, has a maximum storage capacity of 11 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 2000, the structure is 26 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. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 12/03/2021.

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Significant HazardSatisfactory ConditionEmergency Action Plan: Yes

Location

StateWashington
CountyKing
Nearest CityFederal Way
River/StreamNorth Lake
Coordinates47.31167, -122.28938

Physical Characteristics

Dam TypeEarth
NID Height11 ft
Dam Length380 ft
Year Completed2000 (26 years old)

Storage & Hydraulics

NID Storage11 acre-ft
Max Storage11 acre-ft
Normal Storage1 acre-ft
Surface Area14 acres
Drainage Area0 sq mi

Ownership & Safety

PurposeFlood Risk Reduction
OwnerEast Campus Corporate Park c/o Kidder Mathews
Owner TypePrivate
Hazard ClassificationSignificant
Condition AssessmentSatisfactory
Last Inspection12/03/2021
Emergency Action PlanYes

Identifiers

NID IDWA01815
Federal IDWA01815
More InfoState Dam Safety Program

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