Summit Carbon Solutions Project Overview

Preliminary South Dakota Economic Benefit Analysis SUMMIT CARBON SOLUTIONS County Miles Mile % McCook 2.24 0.5% Estimated Total Construction Costs Turner 2.17 0.5% . Budgeted ~$785MM (2022 – 2024) Lincoln 23.49 5.0% Minnehaha 26.64 5.7% Estimated Annual Operating Cost Sully 19.74 4.2% ~ • Budgeted $37MM (2025) Beadle 36.42 7.8% Clark 22 4.7% Estimated Total Construction State and Local Tax Contribution Budgeted >$28MM (2022 – 2024) - Estimated Annual State and Local Tax Contribution Codington 12.05 2.6% Edmunds 24.31 5.2% Hamlin 13.03 2.8% Hand 31.3 6.7% Hyde 18.73 4.0% Kingsbury 29.31 6.2% Lake 32.75 7.0% • Budgeted >$10MM (2025) Miner 14.76 3.1% Spink 73.87 15.7% Brown 28.07 6.0% McPherson 58.2 12.4% Over $200 million, will be spent on labor over the construction period Estimated yearly operations and maintenance spending will include an associated $2 to 3 million in labor income 10

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