20220233 SSUUSTSTAAINAINABBILITILITY REY REPPORORTT Message from Management 1. Overview About Kiewit Sustainability at Kiewit The project was recognized with an Engineering News-Record Our Projects Mid-Atlantic Award of Merit in Airport and Transit. 2. Governance Coastal 29, Washington WMATA Yellow Line Repairs, Tres Rios Wastewater Corporate Governance Kiewit Infrastructure West Co.'s scope of work on the Washington, D.C. Reclamation Facility (WRF), Arizona Supply Chain Coastal 29 project includes correcting 29 fish passage After eight months of safety and critical construction Kiewit Infrastructure West Co. is building a new biosolids barriers. The barriers hinder fish from moving up or repairs, Washington Metropolitan Area Transit Authority’s solar drying facility in Tucson, Arizona, that will be a model 3. Environmental downstream. Correcting these barriers will help with (WMATA) Yellow Line rail reopened to residents in 2023. of sustainability. Environmental Stewardship salmon recovery, restore access to fish habitats and comply with the federal injunction. This train service crosses the Potomac River between The facility is for the Pima County Regional Wastewater Greenhouse Gases & Virginia and downtown D.C. faster and includes travel to Reclamation Department at its Tres Rios Wastewater Energy Consumption The project is broken into five di昀昀erent bundles, with Ronald Reagan Washington National Airport. Reclamation Facility (WRF). The project will reduce 4. Social one or two bundles being built each summer. The team the volume of biosolids while producing higher-quality completed construction on Bundle 1 in 2023, which The 24/7 Yellow Line construction started in September Class A biosolids, which are among the most sought out Health & Safety consists of six di昀昀erent sites. With each site, crews have 2022. Leak mitigation started quickly to enable the for compost and fertilizer with no restrictions. Diversity, Equity & Inclusion to move tra昀昀ic by detouring drivers onto existing roads necessary structural repairs to the tunnel as well as stop or constructing a temporary road bypass around the site. the major tunnel water infiltration. The project will also use 100% renewable resources, Talent & Workforce Then, they install a temporary stream bypass, remove utilizing thermal and solar technologies to maximize Development More than 1,000 individual steel plates were welded into waste heat recovery. It is expected to be complete by Community Engagement the existing culvert and install a new culvert, which the deteriorated sections of the steel tunnel, and over opens up water flow and allows for fish migration. the end of 2024. 14,000 new bolts were installed at steel flanges and ribs. Appendix Work concludes with construction of new stream habitat and roadway restoration. Bridge work over the Potomac included the replacement of 88 deteriorated bearings, a new fire suppression system, new bridge grounding systems and the replacement of critical communication cables and devices. 14141414