Iowa Noname19 is a state-regulated earth dam located in Henry County, Iowa, specifically in the city of Lowell. Built in 1957 by the USDA NRCS, this dam serves multiple purposes including irrigation, recreation, and water supply, with a primary focus on water supply. The dam stands at 27 feet tall, with a length of 656 feet and a storage capacity of 173 acre-feet.

Managed by the Iowa Department of Natural Resources, Iowa Noname19 has a low hazard potential and is currently rated as "Not Rated" in terms of condition assessment. Despite being uncontrolled, the spillway type of the dam ensures safe water discharge in case of overflow. The dam is situated on TS-BIG CREEK, within the Rock Island District, and has a drainage area of 0.7 square miles, serving as a vital water resource for the surrounding area.

As a crucial structure for water management in the region, Iowa Noname19 plays a significant role in regulating water flow and storage. With a moderate risk assessment rating, ongoing inspections, and state permitting and enforcement in place, the dam continues to contribute to the sustainability and resilience of the water resources in Henry County, Iowa.