Giffin #1 (Lower) is a privately-owned irrigation dam located on Lone Tree Creek in Weld County, Colorado. Built in 1948 by designer J.E. WHITTEN, this earth dam stands at 17 feet high and 575 feet long, with a storage capacity of 109 acre-feet. The dam serves the primary purpose of irrigation and is regulated by the Colorado Division of Water Resources.

With a low hazard potential and satisfactory condition assessment, Giffin #1 (Lower) poses a moderate risk factor according to the data. The dam has a spillway type of "Uncontrolled" and a maximum discharge rate of 8060 cubic feet per second. The last inspection was conducted in April 2016, with a scheduled inspection frequency of every 6 years.

Water resource and climate enthusiasts interested in the infrastructure of irrigation dams will find Giffin #1 (Lower) an intriguing case study. Located in the picturesque city of Nunn, this dam plays a crucial role in water management and agricultural activities in the region, highlighting the importance of responsible dam maintenance and regulation for sustainable water resource management in Colorado.