Slab Canyon Reservoir Report
Nearby: Park Creek Floodwater Ret. B-5
Last Updated: December 5, 2025
Slab Canyon, located in Larimer County, Colorado, is a privately owned Earth dam constructed in 1937 for the primary purpose of flood risk reduction along the Slab Canyon Wash.
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Summary
Standing at a height of 26 feet with a length of 1206 feet, this dam has a storage capacity of 1026 acre-feet and serves a drainage area of 2 square miles. While the dam is regulated by the Colorado Department of Water Resources and monitored for inspection, its hazard potential is rated as low with a fair condition assessment as of the last inspection in 2013.
Despite its age, Slab Canyon Dam continues to play a vital role in mitigating flood risks in the Wellington area, safeguarding surrounding communities and infrastructure. With a moderate risk assessment rating and a controlled spillway system, the dam ensures the efficient management of water flow and discharge during heavy rainfall events. As water resource and climate enthusiasts, understanding the significance of structures like Slab Canyon in safeguarding our environment and communities is crucial in promoting sustainable water management practices for the future.
Year Completed |
1937 |
Dam Length |
1206 |
Dam Height |
20 |
River Or Stream |
SLAB CANYON WASH |
Primary Dam Type |
Earth |
Surface Area |
143 |
Hydraulic Height |
20 |
Drainage Area |
2 |
Nid Storage |
1026 |
Structural Height |
26 |
Hazard Potential |
Low |
Nid Height |
26 |
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.
Slab Canyon
Lower North Fork
Filter Plant