North Bay Water Reclamation Pond 1

North Bay Water Reclamation Pond 1 is an earth dam located in Mason County, Washington, built in 2000. It carries a Significant hazard potential classification and has a satisfactory condition assessment.

About North Bay Water Reclamation Pond 1

North Bay Water Reclamation Pond 1 is a dam in Mason, Washington. The dam is owned by Mason County (local government). It impounds the Sherwood Creek - Offstream.

The dam stands 14 feet tall and stretches 1,750 feet across, creates a reservoir covering 4 acres, has a maximum storage capacity of 54 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 09/10/2020.

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Significant HazardSatisfactory ConditionEmergency Action Plan: Yes

Location

StateWashington
CountyMason
River/StreamSherwood Creek - Offstream
Coordinates47.37578, -122.86335

Physical Characteristics

Dam TypeEarth
NID Height14 ft
Dam Length1,750 ft
Year Completed2000 (26 years old)

Storage & Hydraulics

NID Storage54 acre-ft
Max Storage54 acre-ft
Normal Storage44 acre-ft
Surface Area4 acres
Drainage Area0 sq mi
Max Discharge51 cfs

Ownership & Safety

PurposeOther
OwnerMason County
Owner TypeLocal Government
Hazard ClassificationSignificant
Condition AssessmentSatisfactory
Last Inspection09/10/2020
Emergency Action PlanYes

Identifiers

NID IDWA01828
Federal IDWA01828
More InfoState Dam Safety Program

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