Toketee Reservoir Report

Last Updated: December 5, 2025

Toketee, a privately owned hydroelectric dam located in Idleyld Park, Oregon, stands as a significant structure along the North Umpqua River.


°F

°F

mph

Wind

%

Humidity

Summary

Built in 1949 by Pioneer Service & Engineering, this earth dam measures 58 feet in height and 1365 feet in length, with a storage capacity of 880 acre-feet. The dam serves a dual purpose of hydroelectric power generation and recreation, drawing water from a drainage area of 258 square miles.

With a spillway width of 315 feet and a maximum discharge capacity of 28,000 cubic feet per second, Toketee poses a high hazard potential due to its hydraulic height of 40 feet. Despite its age, the dam's condition assessment is currently listed as "Not Available," highlighting the need for regular inspections and maintenance to ensure its structural integrity. FERC serves as the primary regulatory agency overseeing Toketee's operations, with a risk assessment rating of moderate (3) indicating ongoing monitoring and risk management measures in place.

Overall, Toketee's presence on the North Umpqua River showcases the intersection of water resource management and climate considerations, as the dam continues to play a vital role in regional energy production and water regulation. As enthusiasts of water resources and climate issues, exploring the history and current status of Toketee offers insights into the complex balance of infrastructure development, environmental impact, and safety considerations in the management of our water resources.

Year Completed

1949

Dam Length

1365

Dam Height

58

River Or Stream

North Umpqua

Primary Dam Type

Earth

Surface Area

87

Hydraulic Height

40

Drainage Area

258

Nid Storage

880

Structural Height

58

Hazard Potential

High

Foundations

Soil

Nid Height

58
       
Seasonal Comparison

Weather Forecast

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.