Tutor Perini Corporation (NYSE:TPC) (the "Company"), a leading civil, building and specialty construction company, announced today that its subsidiary, Perini Management Services, Inc. ("PMSI"), has been awarded a contract valued at approximately $69.5 million by the National Park Service for a water and wastewater treatment systems rehabilitation project at Death Valley National Park in California.

The scope of work includes rehabilitating, replacing, and upgrading critical components of the water and wastewater systems within the Furnace Creek and Cow Creek areas of Death Valley National Park. Both areas comprise the park’s primary developed areas and serve the park’s 1.7 million annual visitors, 1,100 residents, and the Timbisha Shoshone Tribe.

Wastewater treatment system improvements include replacing sewer gravity and force mains, service laterals, and pump stations. Water system improvements include an extensive new distribution system inclusive of water mains, laterals, pumps and appurtenances, developing new potable water wells, and reconstructing the reverse osmosis treatment building, chlorination building and control systems. The project also includes repairs and upgrades to improve the capacity of a lagoon.

Work is expected to begin in the fall of 2026, with substantial completion anticipated in early 2029. When completed, the project will eliminate significant deferred maintenance, improve the reliability and resilience of essential utility infrastructure, increase system capacity, enhance public health and environmental protection, and provide dependable water and wastewater service for park visitors, residents, employees, and partners.

The contract value will be added to the Company’s backlog in the third quarter of 2026.

About Tutor Perini Corporation

Tutor Perini Corporation is a leading civil, building and specialty construction company offering diversified general contracting and design-build services to private customers and public agencies throughout the world. We have provided construction services since 1894 and have established a strong reputation within our markets by executing large, complex projects on time and within budget while adhering to strict safety and quality control measures. We offer general contracting, pre-construction planning and comprehensive project management services, and have strong expertise in delivering design-bid-build, design-build, construction management, and public-private partnership (P3) projects. We often self-perform multiple project components, including earthwork, excavation, concrete forming and placement, steel erection, electrical, mechanical, plumbing, heating, ventilation and air conditioning (HVAC), and fire protection.

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Tutor Perini Corporation

Jorge Casado, 818-362-8391

Senior Vice President, Investor Relations and Corporate Communications

www.tutorperini.com