Mcfall Reservoir Report
Last Updated: December 5, 2025
Located in Klamath, Oregon, the Mcfall, John Reservoir is a privately owned water storage facility primarily used for irrigation purposes.
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Summary
Completed in 1950, this Earth dam stands at a height of 21 feet and has a storage capacity of 120 acre-feet. The reservoir spans 14.5 surface acres and is fed by Wright Creek, with a maximum discharge of 420 cubic feet per second.
Managed by the Oregon Water Resources Department, the Mcfall, John Reservoir is regulated, inspected, and enforced by state authorities to ensure its safe operation. Despite having a low hazard potential, the dam's condition assessment is currently not rated, with the last inspection conducted in August 2018. With a regular inspection frequency of every 6 years, this reservoir plays a crucial role in supporting agricultural activities in the region.
For water resource and climate enthusiasts, the Mcfall, John Reservoir offers a fascinating glimpse into the intersection of human engineering and natural ecosystems. As a key component of the local irrigation infrastructure, this reservoir showcases the careful balance between water management and environmental stewardship. With its strategic location and functional design, the Mcfall, John Reservoir serves as a vital resource for sustaining agricultural productivity in the area while maintaining a low risk profile for potential hazards.
Year Completed |
1950 |
Dam Length |
220 |
Dam Height |
21 |
River Or Stream |
WRIGHT CREEK |
Primary Dam Type |
Earth |
Surface Area |
14.5 |
Hydraulic Height |
19 |
Drainage Area |
3.7 |
Nid Storage |
120 |
Structural Height |
22 |
Hazard Potential |
Low |
Nid Height |
22 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Link River At Klamath Falls
|
928cfs |
North Canal At Highway 97
|
104cfs |
Ady Canal At Highway 97
|
39cfs |
Klamath Straits Drain Near Worden
|
1cfs |
Klamath River At Keno
|
698cfs |
Klamath River Blw John C.Boyle Pwrplnt
|
902cfs |
Dam Data Reference
Condition Assessment
SatisfactoryNo 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
HighDams 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.
Mcfall, John Reservoir