Page 78 - Martin Marietta - 2024 Sustainability Report

ENVIRONMENTAL STEWARDSHIP

Water and the Needs of Our Communities

Not only do we focus on ensuring that our discharges water stress are those with a range of 40 percent to 80
do not diminish the quality of local water resources, we percent and areas with extremely high water stress are those
also are committed to being responsible users of the greater than 80 percent. We analyzed our operating locations
available water in the communities in which we operate. by zip code, using the World Resources Institute’s Water Risk
Martin Marietta’s production processes rely on water. Atlas tool, known as Aqueduct, which was updated in 2023.
Importantly, we implement water management practices A profile of our building materials operations (which includes
recognizing that clean and reliable water is also critical to all businesses other than Magnesia Specialties) is shown in the
our local communities. graphic below.

To this end, for many years we have monitored the water
stress levels of these communities, measured as a ratio of “Importantly, we implement
annual water withdrawals to total available annual
renewable supply, which measures the competition over water management practices
local water resources. A higher percentage indicates that recognizing that clean and reliable
there are more water users competing for the water
resource. water is also critical to our local
The United States as a whole is categorized as having a communities.”
medium-high (20-40%) water stress rating. Areas with high

47 aggregates locations in areas 20 ready mixed concrete 1 cement plant in area
classified as extremely
as high water stress
high water stress

54 aggregates locations in areas 17 ready mixed concrete
as extremely high water stress
water stress

Geographically, the majority of our locations classified as to create much-needed new fresh water reservoirs at our
high or extremely high water stress areas are primarily in facilities. These water projects include on-going projects at
Texas, Colorado and California. In those areas, and our Riverbend Sand & Gravel, 35th Avenue, Taft Sand &
throughout our operations we have made significant efforts Gravel, Specification Aggregates, Duckworth, and Heaton
to reduce water waste, as described in the following facilities with the opportunity to repurpose more pits in the
examples. future. The West Division is also working to develop storage
facilities in other locations within its footprint to serve
The West Division continues to work in cooperation with the various communities.
City of Denver, the City of Aurora and the State of Colorado

76 2024 SUSTAINABILITY REPORT