The Illinois Basin–Decatur Project (IBDP) is an integrated bioenergy carbon capture and geological storage (BECCS) project conducted at Archer Daniels Midland Company’s (ADM) corn processing plant in Decatur, Illinois, USA (Figure 19.1). Over three years approx. 1000 tonnes/day of carbon dioxide (CO2), obtained from ethanol production at the ADM plant, was compressed, dehydrated, sent along a 1.9-km pipeline, and injected into the Mt. Simon Sandstone 2.14 km deep in the Illinois Basin. Injection took place from November 17, 2011 to November 26, 2014, with 999 215 tonnes of supercritical CO2 injected and geologically stored (Greenberg et al., 2017).