Gsd No B-7 (Gc 1-B) is a vital earth dam located in Atchison, Kansas, completed in 1985 for the primary purpose of flood risk reduction. Designed by the USDA NRCS, this dam stands at a height of 27 feet and spans a length of 655 feet, with a storage capacity of 287 acre-feet. With a low hazard potential and a moderate risk assessment rating, this structure is regulated by the Kansas Department of Agriculture and undergoes regular state inspection, enforcement, and permitting processes to ensure its safety and effectiveness in managing water resources in the region.

Owned and operated by the local government, Gsd No B-7 (Gc 1-B) plays a crucial role in debris control and flood risk reduction within the area. It is situated within the Rock Island District and falls under state jurisdiction, with state-regulated operations and enforcement mechanisms in place to uphold its structural integrity and functionality. Despite not being rated for its condition assessment, this dam serves as a key infrastructure for water resource management in Atchison, Kansas, with a normal storage capacity of 50 acre-feet and a drainage area of 0.76 square miles.

This earth dam, constructed with a buttress core type, features an uncontrolled spillway and no outlet gates, with a spillway width of 40 feet to manage maximum discharges of up to 1259 cubic feet per second. While lacking certain emergency preparedness measures like an Emergency Action Plan (EAP) and inundation maps, Gsd No B-7 (Gc 1-B) remains a significant component of the region's flood control system, serving as a critical structure for water resource and climate enthusiasts to study and monitor in the ongoing management of water-related risks and hazards in the area.