Sloan #1 Reservoir Report
Nearby: D.A. Lord #4 Banner Lake #3
Last Updated: December 5, 2025
Sloan #1 is a privately-owned irrigation dam located in Weld County, Colorado, along the South Platte River.
°F
°F
mph
Wind
%
Humidity
Summary
Built in 1959 by the Soil Conservation Service (SCS), this earth dam stands at a height of 21 feet and has a storage capacity of 100 acre-feet. With a normal storage level of 39 acre-feet and a drainage area of 2 square miles, Sloan #1 plays a crucial role in providing water for agricultural purposes in the region.
Despite being classified as having a low hazard potential and a satisfactory condition assessment, Sloan #1 is subject to regulatory oversight by the Colorado Department of Water Resources. The dam features an uncontrolled spillway with a width of 133 feet and a maximum discharge capacity of 1870 cubic feet per second. While the dam has not undergone any modifications in recent years, it is inspected every six years to ensure its safety and functionality.
The surrounding area of Keenesburg, Colorado benefits from the irrigation capabilities of Sloan #1, helping to support local agriculture. With its moderate risk assessment rating and adherence to state regulatory requirements, Sloan #1 serves as a vital water resource infrastructure for the community, highlighting the importance of effective dam management and maintenance in the face of changing climate conditions.
Year Completed |
1959 |
Dam Length |
697 |
Dam Height |
21 |
River Or Stream |
SOUTH PLATTE RIVER-TR |
Primary Dam Type |
Earth |
Surface Area |
8 |
Hydraulic Height |
18 |
Drainage Area |
2 |
Nid Storage |
100 |
Structural Height |
22 |
Hazard Potential |
Low |
Nid Height |
22 |
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.
Sloan #1