Seymour is a private irrigation dam located in Jackson, Colorado, near the city of Walden. Built in 1966 by designer Stanley Dismuke, this earth dam stands at a height of 20 feet and has a storage capacity of 925 acre-feet. The primary purpose of Seymour is irrigation, but it also serves fire protection, stock, small fish pond, recreation, and water supply needs in the area.

With a low hazard potential and fair condition assessment, Seymour has been regulated by the Colorado Department of Water Resources for state jurisdiction, permitting, inspection, and enforcement. The dam spans 1,286 feet in length and has a spillway width of 25 feet. In the event of emergencies, the dam has a moderate risk assessment rating and an inspection frequency of 6 years, with the last assessment conducted in August 2014.

Located on the Grizzly Creek-TR river or stream, Seymour plays a crucial role in water resource management in the region. Water and climate enthusiasts will appreciate the historical significance and engineering feat of this structure, as well as the impact it has on the surrounding environment and community.