Maroa

The ADM Maroa Project, led by Archer Daniels Midland (ADM), is a major expansion of ADM’s long-standing CO₂ sequestration operations in Decatur, Illinois. The project proposes three new Class VI injection wells (CCS#5, CCS#6, and CCS#7) to be located on leased property north of ADM’s processing complex. Each well is designed to inject approximately 3,050 metric tons of CO₂ per day (about 1.1 million metric tons per year) into the Mt. Simon Sandstone, with the Eau Claire Shale serving as the primary confining zone. Over a planned 12-year operational period, the three wells are expected to store a combined 39.6 million metric tons of CO₂, contributing to a total site storage capacity of up to 95 million metric tons when combined with ADM’s existing and permitted wells (CCS#1–4). The project will include additional monitoring and geophysical wells, as well as new compression and pipeline infrastructure. ADM will leverage lessons from its prior DOE-supported projects (IBDP and ICCS) to ensure containment, supported by robust monitoring of pressure, plume migration, groundwater chemistry, and seismicity. Following injection, ADM plans for 10 years of post-injection site care and monitoring to demonstrate non-endangerment before site closure.