Jenkins Webley Dam Reservoir Report

Last Updated: December 13, 2025

Jenkins Webley Dam, located in Bridgeport, Washington, is a privately owned structure regulated by the Washington Department of Ecology.


°F

°F

mph

Wind

%

Humidity

Summary

Completed in 1945, this earth dam serves primarily for irrigation purposes along the Tr-Columbia River. With a height of 15 feet and a length of 218 feet, the dam has a normal storage capacity of 586 acre-feet and a maximum storage of 1200 acre-feet, ensuring water availability for agricultural activities in the region.

The low hazard potential of Jenkins Webley Dam is complemented by its multi-arch core type design, which utilizes rock and soil foundations for structural stability. The dam's maximum discharge capacity of 254 cubic feet per second ensures effective flood control measures in the area. While the dam's condition remains unrated, its compliance with state inspection and regulatory guidelines reflects a commitment to safety and operational efficiency in managing water resources for irrigation within the region.

Congressional District 04's representative, Dan Newhouse, oversees the management of Jenkins Webley Dam, ensuring that emergency action plans are in place to address any potential risks. While the dam's condition assessment is pending, its strategic location and operational capabilities contribute to the sustainable utilization of water resources for agricultural needs in Douglas County, Washington. As a vital component in the local irrigation infrastructure, Jenkins Webley Dam exemplifies the importance of effective water management practices in sustaining agricultural productivity in the region.

Year Completed

1945

Dam Length

218

River Or Stream

Tr-Columbia River

Primary Dam Type

Earth

Surface Area

586

Hydraulic Height

15

Drainage Area

6.01

Nid Storage

1200

Structural Height

12

Hazard Potential

Low

Foundations

Rock, Soil

Nid Height

15
       
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.