Longleaf CCS Hub

The Longleaf CCS Hub, developed by Tenaska’s affiliate Longleaf CCS, LLC, is an industrial-scale carbon capture and storage project proposed for Mobile County, Alabama. Located 27 miles north of Mobile and near several major CO₂ emitters, the project spans 58,000 acres (90 square miles) between the Mobile Graben and the Citronelle Dome, two well-known geologic structures favorable for long-term CO₂ storage. The hub is designed to sequester CO₂ emissions from key regional facilities including Alabama Power’s 2.6-GW Plant Barry, the Williams Gas Processing Facility, and the AM/NS Calvert Steel Finishing Plant. Collectively, these sources could provide up to 5 million tonnes of CO₂ annually for 30 years, representing 150 million tonnes of total storage potential. To support operations, the project plans to construct up to four injection wells, five in-zone monitoring wells, two above-zone monitoring wells, and four deep USDW monitoring wells, distributed across ten well pads. Shallow groundwater monitoring wells will also be installed to ensure environmental protection. The injection wells: LL#1, LL#2, LL#3, and LL#4 will be capable of injecting up to 13,700 tonnes of CO₂ per day, enabling the storage of about 90% of the targeted emissions.