J. D. Dam Reservoir Report

Last Updated: December 5, 2025

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Summary

D. Dam, located in Coconino, Arizona, is a Federal-owned structure managed by the Forest Service with a primary purpose of serving as a Fish and Wildlife Pond. Built in 1915, this Earth-type dam stands at a height of 21 feet and has a maximum storage capacity of 70 acre-feet. It sits on J D Dam Wash near Sycamore Creek, providing vital water resources for fire protection, livestock, recreation, and aquatic habitats.

With a low hazard potential and moderate risk assessment, J. D. Dam plays a crucial role in managing water resources in the region. The dam's uncontrolled spillway and rock foundations contribute to its structural integrity, while its proximity to Cottonwood ensures easy access for monitoring and maintenance. Despite its age, J. D. Dam continues to support the surrounding ecosystem and serves as a testament to early water management efforts in Arizona.

As a key feature in the Los Angeles District's water infrastructure, J. D. Dam undergoes regular inspections and is well-maintained by the Forest Service. With a focus on fish and wildlife conservation, this historic dam stands as a reminder of the importance of sustainable water resource management in the face of climate change and increasing water demands.

Year Completed

1915

Dam Length

120

Dam Height

21

River Or Stream

J D DAM WASH TR SYCAMORE CREEK

Primary Dam Type

Earth

Surface Area

23

Hydraulic Height

15

Drainage Area

6

Nid Storage

70

Hazard Potential

Low

Foundations

Rock

Nid Height

21
       
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.