Harbor—featuring 1 million square feet of gaming, lodging, entertaining, dining, retail and parking
space—is a showcase for sustainability on the eastern shore of the Potomac River, just south of
Washington, D.C. Every element throughout the 24-story mixed-use development was designed with
sustainability in mind, including extensive use of natural light, LED lighting and water-saving features,
such as the 750,000-gallon cistern that will collect rainwater.
MGM National Harbor was designed to achieve LEED Gold certification by the U.S. Green Building
Council. This is one of the key reasons why Aggregate Industries recommended and supplied 25,000
cubic yards of concrete made with fly-ash blended cement for the structure’s foundation package, which
included pile caps and grade beams.
The use of fly ash, a coal-combustion byproduct, as a partial replacement for portland cement can help
designers and builders recycle industrial byproducts, achieve higher performance from concrete
mixtures and earn points toward LEED certification of their projects. These blended cements have many
properties that contribute to sustainable design—they produce stronger, longer-lasting concrete, reduce
the consumption of nonrenewable raw materials, consume less energy and turn byproduct material
from electric utilities into resources that would otherwise be disposed of in landfills.
In addition to the foundation package, Aggregate Industries also supplied 3,000 cubic yards of ready-mix
concrete for MGM National Harbor’s decorative terraces, walkways and entryways, as well as all the
aggregate needed to produce the remaining 150,000 cubic yards of structural concrete for completing