Unocal Storage Pond #3 Reservoir Report
Nearby: Davis Gulch Middle Fork
Last Updated: December 5, 2025
Unocal Storage Pond #3, located in Garfield, Colorado, is a privately owned water storage facility designed by Union Oil.
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Summary
Completed in 1989, this earth dam structure stands at a height of 21 feet and has a maximum storage capacity of 55 acre-feet. The primary purpose of this pond is for tailings storage, with a normal storage level of 28 acre-feet.
This low hazard potential facility has a spillway width of 100 feet and is equipped with uncontrolled spillway type. The dam has a hydraulic height of 8 feet and a structural height of 21 feet, with a length of 1850 feet. While it has not been inspected since November 1995, the risk assessment for Unocal Storage Pond #3 is considered to be moderate (3).
Overall, Unocal Storage Pond #3 serves as a vital water resource infrastructure in the Parachute Creek area, providing essential storage for tailings disposal. With its relatively low hazard potential and moderate risk assessment, this facility plays a crucial role in managing water resources and maintaining environmental sustainability in the region.
Year Completed |
1989 |
Dam Length |
1850 |
Dam Height |
8 |
River Or Stream |
PARACHUTE CREEK-OS |
Primary Dam Type |
Earth |
Surface Area |
11 |
Hydraulic Height |
8 |
Nid Storage |
55 |
Structural Height |
21 |
Hazard Potential |
Low |
Foundations |
Rock, Soil |
Nid Height |
21 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dam Data Reference
Condition Assessment
SatisfactoryNo 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
HighDams 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.
Unocal Storage Pond #3