Taylor Upper, also known as Taylor #1, is a privately owned irrigation structure located on Castle Creek in Owyhee County, Idaho. Completed in 1964, this earth dam stands at 18.1 feet high and serves the primary purpose of irrigation, with a storage capacity of 120 acre-feet and a surface area of 20 acres. The dam has a significant hazard potential and is rated as being in fair condition as of the last assessment in 2018.

Managed by the Idaho Department of Water Resources, Taylor Upper is subject to state regulation, inspection, and enforcement to ensure its safety and compliance with standards. Its spillway is of the controlled type, with a width of 2 feet, and the dam has a maximum discharge capacity of 8 cubic feet per second. The risk assessment for this structure is very high, emphasizing the importance of ongoing monitoring and maintenance to mitigate potential hazards and ensure the safety of downstream areas along Castle Creek and the Snake River.

Overall, Taylor Upper plays a crucial role in supporting irrigation activities in the region while also posing significant risks that require careful management and oversight. With its unique design features and historical significance, this structure serves as a testament to the intricate balance between water resource management and climate adaptation in the face of changing environmental conditions.