Elko Percolation Pond 4b Dam Reservoir Report
Last Updated: December 15, 2025
Elko Percolation Pond 4b Dam, located in Elko, Nevada, serves as a crucial water resource infrastructure for the region.
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Summary
Completed in 1994, this Earth dam stands at a height of 17 feet and has a hydraulic height of 14 feet, providing storage capacity for irrigation and other purposes. With a normal storage capacity of 30 acre-feet and a maximum storage of 58 acre-feet, this dam plays a vital role in managing water resources in the area.
The dam, situated on the Humboldt River-OS, covers a surface area of 15 acres and has a drainage area of 0.1 square miles. Despite its low hazard potential, the dam underwent structural modifications in 2007 to ensure its continued safety and functionality. The inspection frequency of this dam is every 5 years, with the last assessment conducted in August 2017. While the condition of the dam is currently not rated, measures are in place to manage risks associated with its operation.
As a locally owned and regulated structure, Elko Percolation Pond 4b Dam is subject to state jurisdiction and oversight by the Nevada Department of Water Resources. The dam is equipped with a single slide gate outlet for water release, and no spillway is present. The risk assessment for this dam is rated as high (2), emphasizing the importance of ongoing monitoring and maintenance to mitigate potential hazards. Overall, Elko Percolation Pond 4b Dam plays a crucial role in water management for the Elko community, highlighting the essential intersection of water resources and climate resilience in the region.
Years Modified |
2007 - Structural |
Year Completed |
1994 |
Dam Length |
3900 |
Dam Height |
17 |
River Or Stream |
HUMBOLDT RIVER-OS |
Primary Dam Type |
Earth |
Surface Area |
15 |
Hydraulic Height |
14 |
Drainage Area |
0.1 |
Nid Storage |
58 |
Structural Height |
17 |
Outlet Gates |
Slide (sluice gate) - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
17 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
S F Humboldt R Ab Dixie C Nr Elko
|
16cfs |
S Fk Humboldt R Abv Tenmile Ck Nr Elko
|
33cfs |
Humboldt R Nr Carlin
|
32cfs |
Humboldt R Nr Elko
|
12cfs |
Susie Creek At Carlin
|
1cfs |
Maggie Ck At Carlin
|
12cfs |
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.
Elko Percolation Pond 4b Dam