Olds Reservoir Report
Nearby: D.A. Lord #4 Prospect
Last Updated: December 5, 2025
Olds is a privately owned earth dam located in Weld County, Colorado, specifically in the city of Roggen.
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Summary
Built in 1918, this dam on the Lost Creek-OS river has a height of 23 feet and a length of 1100 feet, providing a storage capacity of 1700 acre-feet. With a surface area of 134 acres, the dam's primary purpose is categorized as "Other", serving various purposes beyond flood control or water supply.
Despite being classified as having a low hazard potential and a satisfactory condition assessment, Olds poses a moderate risk due to its age and the potential for various factors to impact its structural integrity. The dam features an uncontrolled spillway with a width of 200 feet, and its last inspection took place in September 2019, with a scheduled inspection frequency of every 6 years. With the dam located within the jurisdiction of the Colorado Division of Water Resources, it is subject to state regulations, permitting, inspection, and enforcement to ensure its continued safety and functionality.
For water resource and climate enthusiasts, Olds presents an opportunity to study the management and maintenance of aging infrastructure in the face of evolving environmental conditions. Understanding the risk factors associated with dams like Olds is crucial for developing effective risk management measures and ensuring the long-term resilience of water infrastructure in the region. As climate change continues to impact water resources, the maintenance and monitoring of dams like Olds will be essential in safeguarding communities and ecosystems downstream.
Year Completed |
1918 |
Dam Length |
1100 |
Dam Height |
23 |
River Or Stream |
LOST CREEK-OS |
Primary Dam Type |
Earth |
Surface Area |
134 |
Hydraulic Height |
23 |
Nid Storage |
1700 |
Structural Height |
23 |
Hazard Potential |
Low |
Nid Height |
23 |
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.
Olds