20220233 SSUUSTSTAAINAINABBILITILITY REY REPPORORTT Message from Management 1. Overview About Kiewit Sustainability at Kiewit Our Projects Madison Fields Solar, Ohio Gemini Solar and Storage, Nevada Electric Bus Infrastructure, 2. Governance Texas The Madison Fields Solar Project in Pike Township in In 2023 Kiewit Power Constructors Co. completed its Corporate Governance Madison County, Ohio — about 30 miles west of Columbus EPC contract for Primergy’s Gemini project outside of In 2022, Houston Metro received funding to purchase Supply Chain — is a 234-megawatt solar-powered generating facility. Las Vegas, Nevada. Gemini includes a 967-MW solar farm 20 electric buses. This was Houston Metro's first step It’s located on 1,100 acres of a 1,932-acre project area and and a 380 MW, four-hour battery energy storage system. It towards procuring only zero-emission buses by fiscal 3. Environmental is expected to generate power for up to 35,000 households. is one of the largest solar facilities in the U.S. The project is year 2030. To accommodate the new electric buses, Environmental Stewardship Working with project owner Savion Energy, Kiewit Power carefully sited on less than 7,000 acres. upgrades were required at Houston Metro’s Kashmere, Greenhouse Gases & Constructors Co. started an EPC contract in November Polk and Westpark bus operating facilities. 2022. The project reached completion in December 2023. The project included placing almost 15,000 racks and Energy Consumption over 1,790,000 solar modules. Additional scope included Mass. Electric Construction Co. (MEC), a subsidiary The project scope included 15 miles of access roads to constructing a multiple 34.5kV overhead collection circuit of Kiewit Corporation, installed 20 Heliox Flex 180KW 4. Social the power blocks, driving 80,000 piles to support the that will tie the new solar field back to the substation. chargers, 26 charger columns and four Heliox 50 KW Health & Safety racking system that holds and tracks the photovoltaic (PV) mobile chargers at three bus operating facilities. The modules, installing 420,000 bifacial PV modules to produce Gemini has the capacity to power 260,000 homes during scope of work included installing all underground duct Diversity, Equity & Inclusion super peak periods. power, running over 2 million linear feet of DC and AC banks, foundation work, equipment installation, testing Talent & Workforce cable and placing 45,000 linear feet of permanent fencing. and commissioning support and all other associated Development infrastructure work to support the Heliox chargers. The Community Engagement work was completed in 2023. ONE OF ONE OF THE LARGETHE LARGESSTT SOLAR SOLAR Appendix FFAACILITIECILITIES IN S IN THE UTHE U.S.S.,., As an organization, Kiewit continues broader e昀昀orts Read more about the Madison Fields Project WITH THE WITH THE CCAPAPAACITCITYY T TO O POPOWER WER UP TUP TOO to support transit agencies during their transition from in Kieways 260260,,000 000 HOMEHOMESS diesel to zero emissions buses. 12121212