No 3, also known as Ksnoname 1821, is a private water structure located in Alton, Kansas. This dam, with a height of 21 feet, serves multiple purposes including fire protection, stock containment, and as a small fish pond. It has a maximum storage capacity of 99 acre-feet and a normal storage capacity of 79 acre-feet, making it a valuable resource for the local community.

Situated on the South Solomon River, No 3 is classified as a buttress dam with a hydraulic height of 20 feet and a structural height of 21 feet. Despite its low hazard potential and unlisted condition assessment, the dam has not been inspected or assessed recently. It is vital that proper maintenance and monitoring of this water structure be conducted to ensure its continued safety and functionality for both water resource and climate enthusiasts in the area.

While the dam has not been modified or updated in recent years, it is crucial that emergency action plans are prepared and reviewed regularly to mitigate any potential risks associated with its operation. With its strategic location and multiple uses, No 3 plays a significant role in water conservation and management efforts in Rooks County, Kansas.