Wampler-Werth Reservoir Report

Last Updated: December 6, 2025

Wampler-Werth, located in Crook, Oregon, is a privately owned dam with a primary purpose of water supply.


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Summary

This Earth dam, completed in 1983, stands at a height of 20 feet and has a hydraulic height of 16 feet. It has a storage capacity of 90 acre-feet and covers a surface area of 11.2 acres, serving a drainage area of 3.9 square miles. The dam, situated on the Central Oregon I.D. Canal, is regulated by the Oregon Water Resources Department and undergoes regular inspections and enforcement measures to ensure its safety and compliance with state regulations.

With a significant hazard potential, Wampler-Werth is equipped with slide gates for outlet control. Despite not having a condition assessment rating, the dam has a scheduled inspection frequency of every 3 years, with the last inspection conducted in March 2018. While the Emergency Action Plan (EAP) status and risk assessment details are not provided, the dam's location in a remote area without downstream settlement underscores the importance of its role in water supply management in the region. As a crucial infrastructure for water resource management, Wampler-Werth plays a vital role in supporting agricultural and municipal water needs in the area, highlighting the significance of maintaining its integrity and safety for long-term sustainability.

Year Completed

1983

Dam Length

750

Dam Height

20

River Or Stream

CENTRAL OREGON I.D. CANAL

Primary Dam Type

Earth

Surface Area

11.2

Hydraulic Height

16

Drainage Area

3.9

Nid Storage

90

Structural Height

20

Outlet Gates

Slide (sluice gate)

Hazard Potential

Significant

Nid Height

20
       
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.