Frd No Gs 4, also known as Walnut Creek Watershed Dam Gs 4, is a local government-owned earth dam located in Hamlin, Kansas. Built in 1965 by the USDA NRCS, this dam serves the primary purpose of flood risk reduction in the Terrapin Creek-TR watershed. With a structural height of 31 feet and a hydraulic height of 26 feet, Frd No Gs 4 has a storage capacity of 142 acre-feet and a normal storage level of 21 acre-feet.

The dam spans 880 feet in length and covers a surface area of 5.27 acres, with a drainage area of 0.78 square miles. It features an uncontrolled spillway with a width of 75 feet and a maximum discharge capacity of 370 cubic feet per second. Despite its low hazard potential and moderate risk assessment rating of 3, Frd No Gs 4 has not been officially rated for its condition and maintenance status. The dam does not have outlet gates and has not undergone recent inspections or emergency action plan updates.

Overall, Frd No Gs 4 plays a crucial role in mitigating flood risks in the Walnut Creek watershed. As water resource and climate enthusiasts, it is essential to monitor and ensure the proper maintenance and inspection of this dam to uphold its effectiveness in protecting the surrounding communities from potential flooding events.