Page 34 - 2019 Sustainability Report

Geographically, the majority of our locations classified as high water stress are located in Texas; those classified
as extremely high water stress areas are primarily in Texas and Colorado. In those areas, responsible water use and
recycling are critical, and we have made significant efforts to reduce water waste, as described in the following examples.

TEXAS COLORADO

Over the past several years, Martin Marietta has invested The West Division continues to work in cooperation with
in water recovery equipment at Medina Rock & Rail the City of Denver to create a much-needed new fresh
Quarry, Beckmann Quarry, Chico Quarry, Black Spur’s Bird water reservoir at our Riverbend Sand & Gravel site that
Hill Plant and Hunter Stone Quarry, each located in Texas. will supply additional water to the growing population of
For example, at Hunter Stone Quarry, we installed a $5 Denver. Work at the site has progressed, and two of the
million plate press that eliminated the need for a settling planned storage cells were completed in 2019. We also
pond, thereby reducing water loss due to evaporation have similar projects at each of our 35th Avenue, Ditullio,
and infiltration. Duckworth and Heaton facilities with the opportunity to
repurpose more pits in the future.
The water recovery system at Beckmann Quarry, installed in
2010, continues to provide significant benefits and reduced At our Taft Sand & Gravel operation, located in Fort
the facility’s water withdrawal by an average of 50 percent Collins, Colorado, a series of five lined reservoirs has
compared to 2009. This equates to a pumping reduction of been completed as part of our reclamation efforts. These
more than 20,000 acre-feet, resulting in billions of gallons former gravel pits were converted in partnership with
of additional Edwards Aquifer water that is available to local utility Tri-Districts as a way to provide water to the
South Central Texas communities for other beneficial uses. local communities. The reservoirs provide more than 500
million gallons of water to the Tri-Districts Utility. Additional
reservoirs will be created as part of the site’s reclamation
In 2019, our Texas ready mix operations undertook a plan supplying additional water storage to the surrounding
number of initiatives designed to reduce water waste. communities.
Nine Shumaker Industries “Load and Go Ready Mix Truck
Wash” systems were installed in our Dallas-Fort-Worth-
®
area ready mix plants. These systems dramatically reduce
the amount of water used to clean ready mix trucks after
loading, reducing both water use and runoff. In addition,
two plants installed filter press technology and a third
installed a new Fortrans pH control system.

Sunset at our Medina Rock & Rail
facility near Hondo, Texas.

34 / MARTIN MARIETTA / SUSTAINABILITY REPORT / 2019