Heater Reservoir #2 Reservoir Report

Last Updated: December 13, 2025

Heater Reservoir #2, also known as Upper Heater Res., is a private-owned reservoir located in Marion, Oregon, along the Center Fork Drift Creek.


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Summary

This reservoir was completed in 1981 and has a primary purpose of irrigation, with a storage capacity of 42.5 acre-feet and a surface area of 4.65 acres. With a significant hazard potential, the dam stands at a height of 28 feet, serving as a crucial water resource for the surrounding area.

Managed by the Oregon Water Resources Department, Heater Reservoir #2 is regulated, permitted, inspected, and enforced by the state agency to ensure its safety and functionality. The dam is of earth type, with a hydraulic height of 24 feet and a length of 290 feet. Despite being classified as not rated in terms of condition assessment, the reservoir plays a vital role in water management for irrigation purposes in the region.

With a maximum discharge of 82 cubic feet per second, Heater Reservoir #2 poses a significant risk if not properly maintained and managed. The dam has no spillway type specified, but with regular inspections and a designated inspection frequency of 3 years, efforts are made to mitigate potential hazards and ensure the safety of the structure. As a key component of the local water infrastructure, this reservoir serves as a critical resource for water supply and irrigation in the area.

Year Completed

1981

Dam Length

290

Dam Height

28

River Or Stream

CENTER FORK DRIFT CREEK

Primary Dam Type

Earth

Surface Area

4.65

Hydraulic Height

24

Drainage Area

0.19

Nid Storage

42.5

Structural Height

28

Hazard Potential

Significant

Nid Height

28
       
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.