Sherman Stock Reservoir #1, located in Columbia County, Oregon, is a privately-owned earth dam completed in 1952 for the primary purpose of irrigation. This reservoir has a storage capacity of 36 acre-feet and covers a surface area of 2.7 acres, serving as a vital water resource for the surrounding agricultural community. With a low hazard potential and a needle outlet gate system, the dam is designed to efficiently regulate water flow and ensure the safety of downstream areas.

Situated on Sly Creek, a tributary to the Columbia River, Sherman Stock Reservoir #1 plays a key role in managing water resources in the region. The dam stands at a height of 28 feet, with a hydraulic height of 22 feet and a length of 180 feet. Although the condition assessment is currently listed as "Not Rated," regular inspections and maintenance practices are in place to uphold the structural integrity of the dam and mitigate any potential risks.

Managed by the Oregon Water Resources Department, Sherman Stock Reservoir #1 is subject to state regulations, permitting, and inspection requirements to ensure compliance with safety standards and environmental conservation efforts. As part of the broader water infrastructure in the area, this reservoir underscores the importance of sustainable water management practices and the crucial role of irrigation systems in supporting agricultural activities and local communities amidst changing climate conditions.