Twin Basin is a private irrigation structure located in Mesa County, Colorado, specifically in the city of Molina. Built in 1912, this earth dam stands at a height of 17 feet and has a storage capacity of 172 acre-feet. Its primary purpose is irrigation, serving the Bull Creek-TR river or stream.

The dam is classified as a low hazard potential structure with a fair condition assessment as of July 2020. It features an uncontrolled spillway with a width of 20 feet and is equipped with a slide (sluice gate) outlet gate. The structure has undergone inspections every 6 years, with the last one conducted in July 2020.

Overall, Twin Basin presents a moderate risk level according to the data, highlighting the importance of ongoing risk management measures. With its historical significance and role in supporting irrigation in the region, this structure serves as a valuable asset for water resource management in the area.