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Marion Sours
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The Infrastructure Show - Podcasts
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Energy from wind and solar sources is available when nature permits, but the demand for energy is based on the cyclical needs of people and their activities. To make renewable energy work, and to manage the normal daily mismatches between suppl
In very cold places, like Alaska, Northern parts of Canada and Europe, building infrastructure means building on permafrost, perennially frozen ground. Permafrost provides reliable foundations for buildings and highways as long as it remains fr
Spectacular bridges can be focal points of their host cities, reminding us that unique infrastructure can also be unique art. Lighting those bridges can carry their aesthetic value into the night. In 2013, the San Francisco-Oakland Bay Bridge w
The Port of Duluth-Superior, located at the western end of Lake Superior, is a national and international cargo hub, serving the Great Lakes and, through the St. Lawrence Seaway, the rest of the world. It supports flows of bulk cargoes such as
Some U.S. Cities are taking back streets from exclusive use by motor vehicles to protect and prioritize vulnerable road users – pedestrians and bicyclists – and to enhance neighborhood livability. This process is advanced under the banner of Co
PFAS, per- and polyfluoroalkyl substances, the forever chemicals, are commonly used as protective coatings because they resist heat, stains and water. Because PFAS do not normally degrade in the environment, when products containing them are di
PFAS, per- and polyfluoroalkyl substances, the forever chemicals, are commonly used as protective coatings because they resist heat, stains and water. Because PFAS do not normally degrade in the environment, when products containing them are di
On June 11, 2023, a gasoline truck caught fire under I-95 in Philadelphia, essentially melting a major section of the primary roadway through the center of the Northeast Corridor. Facing what looked like a months-long reconstruction process, th
Fluctuations in water levels on our inland waterways system can affect the movement of bulk freight, particularly agricultural products. Low waters, as occurred in the fall of 2022 on the lower Mississippi River, limited the flow of freight and
The 150-year-old Baltimore and Potomac Tunnel, Amtrak’s oldest, carries traffic for Amtrak, the Maryland Area Rail Commuter (MARC) Service, as well as Norfolk Southern freight operations. This tunnel is a major bottleneck for Northeast corridor
US railroads are highly efficient at moving freight. Indeed, our freight rail system is the envy of the world, but sometimes accidents occur. When train derailments occur, the outcome is usually minor, but occasionally more serious problems ari
Wood has been perhaps the most common material for buildings for millennia, but innovations in its application are bringing new opportunities and advantages for working with this sustainable material. Structural applications of mass timber are
Changing climate brings new risks to infrastructure, and commonly these risks are shared with insurance companies. To control their risks, insurers need to understand and anticipate both the sources and characteristics of natural threats, and t
COVID-19 has robbed public transit of riders as many have changed workplaces, shifted schedules, and chosen new ways to travel to avoid crowds. Transit operators around the world are working to attract commuters back, adjusting services and far
Mobility is essential for the well-being of people wherever they live. The automobile is king of the mobility market across the US, but public transit supports mobility for those who cannot, or chose not to, travel by car. The need for alternat
A hotter climate brings new challenges to the built infrastructure, stressing service systems – power generation and distribution and transportation systems – as well as structures. Are we prepared for these problems? How can infrastructure ada
Superfund sites are seriously polluted locations that are subject to remediation by the Environmental Protection Agency under the 1980 Comprehensive Environmental Response, Compensation and Liability Act (CERCLA). These clean-up processes can b
This podcast is a timely history lesson about the electrification of rural America and the Depression-era program that made it happen. The Rural Electrification Act of 1936 – the REA – provided federal loans to install electrical distribution s
Marine ports are gateways to world trade, and their efficient functioning is a pillar of our economy. East and Gulf Coast ports have grown more important in recent years because of the expanded Panama Canal locks opened in 2016 and continuing c
Railroads and motor vehicles can come into conflict at level, or at-grade crossings. Such conflicts almost always lead to deadly consequences. In this podcast we consider the trend in rail grade crossing crashes, and the differences that crossi
Replacing an active railroad bridge while limiting disruptions to both rail and river traffic presents significant challenges in design and construction staging. The 1889 Merchants Bridge at St. Louis – the oldest remaining rail bridge across t
Because temperatures below the surface of the earth are relatively constant year around, the earth can be used as a heat sink or source to cool or heat buildings, offering an energy source that is not only carbon-free, but is also constant. How
Over 1200 tornadoes strike the U.S. each year, bringing destruction, injuries, and deaths to communities. Until recently there were no structural design standards specifically aimed at providing some tornado protection for buildings.In this p
Is it more costly to build urban rail infrastructure in America? Does that affect the quality of the products? If so, can we do anything to control costs and get more value for our money?The Eno Center for Transportation, an independent thin
The Everglades is a huge wetland – an area permanently covered with water – that includes a variety of unique ecosystems delivering essential services to both natural and human development systems, including water storage, treatment, flood cont
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