Simplot Hermiston #2 (Lagoon) Reservoir Report
Last Updated: December 13, 2025
Simplot Hermiston #2 (Lagoon), also known as Sparks Lagoon in Echo, Oregon, is a privately owned water resource structure designed by SCM Consultants.
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Summary
Completed in 2002, this earth dam stands at a height of 32 feet and has a storage capacity of 353 acre-feet. Situated off-channel in Umatilla County, this lagoon serves a primary purpose of "Other" and is regulated by the Oregon Water Resources Department.
With a low hazard potential and a moderate risk assessment rating, Simplot Hermiston #2 poses no immediate danger but requires regular inspections, with the last one conducted in March 2018. The dam features an uncontrolled spillway and has not been modified since its construction. Despite its earth construction, the dam's condition has not been officially assessed, indicating a need for further evaluation to ensure its long-term structural integrity. Positioned within the Portland District of Oregon, this lagoon provides insight into the region's water management strategies and highlights the importance of ongoing monitoring and maintenance for water resource and climate enthusiasts.
Year Completed |
2002 |
Dam Height |
32 |
River Or Stream |
OFF CHANNEL |
Primary Dam Type |
Earth |
Surface Area |
15.5 |
Nid Storage |
353 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
32 |
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.
Simplot Hermiston #2 (Lagoon)