Vandecoevering Reservoir Report

Last Updated: December 13, 2025

Vandecoevering, also known as James North Reservoir, is a private water resource located in Clackamas County, Oregon.


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Summary

This water structure is primarily used for irrigation purposes and is regulated by the state, with permits, inspections, and enforcement measures in place to ensure its safe operation. The reservoir has a storage capacity of 87 acre-feet and a dam height of 15 feet, with a low hazard potential according to assessments.

Situated near the UNNAMED tributary of Rock Creek, Vandecoevering plays a crucial role in water management in the area. Although the dam type, construction year, and other specific details are not provided, the reservoir serves as a key component in the local water infrastructure. Despite its low hazard potential, regular inspections are carried out, with the last one conducted in October 2018, and a six-year inspection frequency in place to maintain its safety and functionality.

For water resource and climate enthusiasts, Vandecoevering offers a glimpse into the intricate network of water structures that support agriculture and irrigation in Oregon. With its location in a vital watershed and state-regulated status, this reservoir underscores the importance of responsible water management practices to ensure sustainable usage and environmental protection. As a privately-owned facility, Vandecoevering exemplifies the collaborative efforts between private stakeholders and state agencies in safeguarding water resources for present and future generations.

Dam Height

15

River Or Stream

UNNAMED, TRIB/ROCK CREEK

Nid Storage

87

Hazard Potential

Low

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.