Ide and Starbird #1, also known as Thomas, is a privately owned irrigation dam located in Weld County, Colorado. Built in 1895, this earth dam stands at a height of 8 feet and spans 325 feet in length, with a storage capacity of 110 acre-feet. Situated on Big Hollow Creek, the dam serves the primary purpose of irrigation for agricultural lands in the region.

Managed by the Colorado Department of Water Resources (DWR), Ide and Starbird #1 is regulated, permitted, inspected, and enforced by the state agency to ensure its safe operation. With a low hazard potential and fair condition assessment, this irrigation dam poses a moderate risk, requiring appropriate risk management measures to be implemented. The dam features an uncontrolled spillway with a width of 100 feet and has a maximum discharge capacity of 200 cubic feet per second.

Despite its age, Ide and Starbird #1 continues to play a vital role in sustaining water resources for the surrounding area. Its historical significance, combined with its functional importance in providing irrigation water, makes it a noteworthy structure for water resource and climate enthusiasts to study and appreciate in the picturesque landscape of Weld County, Colorado.