Simplot Feeders Waste Pond No1 Reservoir Report

Last Updated: December 14, 2025

Simplot Feeders Waste Pond No1, also known as Iowa Beef Processors Waste Pond No.


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Summary

1, is a privately owned waste pond located in Walla Walla, Washington. Managed by the Washington Department of Ecology, this pond is regulated, permitted, inspected, and enforced by state authorities. Built in 1973, the earth dam stands at a height of 15 feet and has a storage capacity of 270 acre-feet, serving a drainage area of 55 acres.

With a surface area of 2 acres, the pond's primary purpose is listed as "Other," with a fair condition assessment as of October 2018. Despite having a significant hazard potential, the pond's emergency action plan was last revised in January 2021. Situated off the Columbia River, this structure plays a crucial role in managing wastewater in the area and poses potential risks that require careful monitoring and management to ensure the safety of the surrounding community and environment.

From its construction in the early 1970s to its recent inspection in 2018, Simplot Feeders Waste Pond No1 has continued to serve its purpose efficiently while being subject to state regulations and oversight. As a vital element in the local water resource infrastructure, this waste pond stands as a testament to the ongoing efforts to balance environmental protection with industrial needs in the Walla Walla region.

Year Completed

1973

Dam Length

1130

River Or Stream

Columbia River-Offstream

Primary Dam Type

Earth

Surface Area

2

Hydraulic Height

15

Drainage Area

55

Nid Storage

270

Structural Height

15

Hazard Potential

Significant

Foundations

Soil

Nid Height

15
       
Seasonal Comparison

Weather Forecast

Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.