Page 79 - Martin Marietta - 2024 Sustainability Report

ENVIRONMENTAL STEWARDSHIP

Our Colorado Front Range operations are situated adjacent Water sampling at our new SDI Quarry in south Florida
to rivers, streams and ditches that provide vital water for
agricultural, residential and commercial purposes. This
system of water distribution through streams and ditches
was established in the 1880s supplying water from the
Mountains to the Front Range below. Through our
numerous water rights, four state approved reservoirs and
leases, Martin Marietta operates to ensure there is no net
water loss to the stream system. This means that our total
water usage is returned back monthly to the stream system
and the surrounding aquifers. In 2024, Martin Marietta
returned over 400 million gallons of water back to the
environment through this process.

While water conservation and protection is key in our
western operations, it is not neglected elsewhere. In 2024,
our East Division initiated a wet processing training
program to retrain our employees on the fundamentals of
material washing at our sites. As part of this program,
significant operational and engineering efforts were made
to reduce wasted water as well as to reduce the amount of
fine aggregate material entering settling ponds. Further,
the sites were tasked with reducing the fine aggregate
component contained in their discharges. As a result, not
only was additional salable product generated, but across
55 sites, the division’s initial estimate is that 1.4 billion
gallons of water use reductions were achieved.

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