J. O. Hill Reservoir Report

Last Updated: December 5, 2025

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Summary

O. Hill, also known as Pine Lakes, is a private water resource nestled in the picturesque surroundings of Douglas County, Colorado. This reservoir, completed in 1964, serves multiple purposes including recreation and water supply, making it a vital resource for the local community. The dam, standing at a height of 29 feet and with a hydraulic height of 30 feet, offers a storage capacity of 253 acre-feet and covers a surface area of 18 acres, making it an important water source in the region.

Located on West Creek in the city of Deckers, J. O. Hill dam is regulated by the Colorado Division of Water Resources and is subject to regular inspections to ensure its structural integrity. With a significant hazard potential and a high risk assessment rating, the dam is closely monitored to manage any potential risks effectively. Despite these challenges, the condition assessment of J. O. Hill dam remains satisfactory, highlighting the efforts put into maintaining the safety and functionality of this critical water infrastructure.

As a focal point for outdoor activities and water supply, J. O. Hill dam continues to play a crucial role in the local ecosystem. With its scenic surroundings and important functions, this private reservoir stands as a testament to the intersection of water resource management, climate resilience, and recreational enjoyment in the beautiful state of Colorado.

Year Completed

1964

Dam Length

530

Dam Height

29

River Or Stream

WEST CREEK

Primary Dam Type

Earth

Surface Area

18

Hydraulic Height

30

Drainage Area

56

Nid Storage

253

Structural Height

44

Hazard Potential

Significant

Nid Height

44
       
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.