Continental #2 Reservoir Report

Last Updated: December 5, 2025

Continental #2 is a privately owned irrigation dam located in Coconino, Arizona, near the city of Flagstaff.


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Summary

Built in 1974, this earth dam stands at a height of 35.7 feet with a hydraulic height of 41.7 feet, serving the primary purpose of irrigation. With a storage capacity of 876 acre-feet and a normal storage level of 611 acre-feet, this dam plays a crucial role in water resource management in the region.

Managed by the Arizona Department of Water Resources, Continental #2 has a high hazard potential but is currently in satisfactory condition as of the last assessment in August 2017. The dam's spillway is uncontrolled, with a maximum discharge capacity of 270 cubic feet per second. Despite its moderate risk level, the dam does not have an Emergency Action Plan (EAP) in place, highlighting the need for continued monitoring and risk management measures to ensure the safety and integrity of the structure.

With the dam located on the Rio de Flag - TR stream, its importance in supporting local agriculture and water supply cannot be understated. As a key component of the water infrastructure in the area, Continental #2 underscores the critical role that dams play in sustaining water resources and mitigating the impacts of climate change on water availability.

Year Completed

1974

Dam Length

650

Dam Height

35.7

River Or Stream

RIO DE FLAG - TR

Primary Dam Type

Earth

Surface Area

38

Hydraulic Height

41.7

Drainage Area

0.63

Nid Storage

876

Structural Height

41.7

Hazard Potential

High

Foundations

Rock, Soil

Nid Height

42
       
Seasonal Comparison

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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.