Tim Lau Site 1 is a privately owned grade stabilization dam located in Indianola, Iowa, along Squaw Creek. Constructed in 2016 by USDA - NRCS, this earth dam stands at 32 feet high and spans 468 feet in length, with a storage capacity of 22 acre-feet. The dam serves the primary purpose of grade stabilization and is regulated by the Iowa Department of Natural Resources.

Despite its low hazard potential, Tim Lau Site 1 is considered to have a moderate risk level, with a risk assessment rating of 3 out of 5. The dam features an uncontrolled spillway with a width of 12 feet and a surface area of 2 acres, serving an area with a drainage area of 0.05 square miles. While the condition assessment is not rated, the dam is subject to state regulation, permitting, inspection, and enforcement to ensure its safety and compliance with standards.

This site, situated in Clarke County, Iowa, is under the jurisdiction of the Kansas City District of the US Army Corps of Engineers. With its strategic location and vital role in managing water resources, Tim Lau Site 1 is a focal point for water resource and climate enthusiasts interested in sustainable infrastructure and watershed management practices.