Infrastructure
The Old Bridge and the Reef: Skanska Leading the Charge with Environmental Restoration and Sustainability
By Thomas J. Fulton, Senior Vice President of Operations at Skanska
In late 2022, the ribbon was cut on the new four-lane Harry W. Nice Memorial/Senator Thomas "Mac" Middleton Bridge, a remarkable infrastructure project that not only improves mobility and safety but also sets an example of important environmental restoration and sustainability efforts in the Potomac River region. The project, connecting Newburg, Maryland, and Dahlgren, Virginia, has redefined transportation and environmental conservation. Skanska, a global development and construction company, has been at the forefront of this remarkable endeavor. This joint venture of Skanska, Corman Kokosing Construction Company, and McLean Contracting Company has demonstrated their commitment to sustainable practices and the preservation of the local ecosystem. A standout feature of this project is the innovative repurposing of materials from the old bridge, showcasing Skanska's dedication to sustainability. Approximately 9,500 tons of concrete from the 80-year-old bridge are being used to create an artificial reef site, providing essential habitat and shelter for a wide variety of marine species, including striped bass, bluefish, and oysters. The initiative highlights the careful planning and resourcefulness of the construction team, demonstrating the possibilities of transforming a demolition site into enhancements for the ecosystem. Not only does this reduce the environmental impact of the project, but also showcases the importance of responsible construction practices when dealing with the effects of infrastructure construction on the environment.
The decision to utilize the old bridge's concrete as the foundation for these sanctuaries demonstrates a unique approach to environmental restoration and sustainability. By reimagining construction demolition, this joint venture has contributed to the expansion of marine habitats, which play a vital role in the health and diversity of the local ecosystem. The artificial reef site will create a thriving marine environment that benefits the surrounding area and the Potomac River. Additionally, the project emphasizes its commitment to sustainability by partnering with the state of Maryland and the Potomac River Fisheries Commission to plant nearly 12 million live oysters. Each of these oysters has the potential to filter approximately 50 gallons of water per day, a sustainable approach that promotes cleaner water. Demolition and Repurposing One of the most remarkable aspects of the Nice-Middleton Bridge project is the creative approach to bridge demolition and materials repurposing. The old bridge, spanning the Potomac River, presented a unique opportunity to reuse its materials, which reduced waste and environmental impact. Skanska and its partners undertook a careful and controlled demolition process using a combination of mechanical and controlled blast demolition techniques. The concrete from the old bridge was then loaded onto barges and transported to an artificial reef site, which was designed to provide a suitable habitat for a wide range of fish and invertebrates. In total, approximately 9,500 tons of old bridge materials were repurposed
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Spring 2024
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