Hilltop Waterski Pond Reservoir Report

Last Updated: December 15, 2025

Located in Snohomish, Washington, Hilltop Waterski Pond is a private recreational facility regulated by the Washington Dept of Ecology.


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Summary

The pond, completed in 1995, is a popular spot for water skiing enthusiasts looking to enjoy the 100-acre surface area and 130-acre storage capacity. With a hydraulic height of 26 feet and a structural height of 23 feet, the earth dam is designed to withstand high hazard potential events while maintaining a fair condition assessment.

Managed for recreational purposes, Hilltop Waterski Pond is situated along Tr - Quilceda Creek in Congressional District 02, Washington. Despite its high hazard potential, the pond has a maximum discharge of 16 cubic feet per second and a drainage area of 0.04 square miles. Regularly inspected every 5 years, the dam meets state permitting and inspection requirements, providing a safe and enjoyable environment for water sports enthusiasts. With its proximity to Seattle District and oversight by the Washington Dept of Ecology, Hilltop Waterski Pond offers a unique recreational experience for water resource and climate enthusiasts in the region.

Year Completed

1995

Dam Length

4200

River Or Stream

Tr - Quilceda Creek

Primary Dam Type

Earth

Surface Area

100

Hydraulic Height

26

Drainage Area

0.04

Nid Storage

130

Structural Height

23

Hazard Potential

High

Foundations

Soil

Nid Height

26
       
Seasonal Comparison

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Dam Data Reference

Condition Assessment

Satisfactory
No existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.

Hazard Potential Classification

High
Dams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.