Page 49 - 2020 Sustainability Report

ENVIRONMENTAL STEWARDSHIP

In 2020, our Texas ready mix operations undertook with the opportunity to repurpose more pits in the future.
additional initiatives designed to reduce water waste. Three The West Division is also working to develop storage
additional Shumaker Industries “Load and Go Ready Mix facilities in other locations within its footprint.
®
Truck Wash” systems were installed in our Dallas-Fort- Our Colorado Front Range operations are situated adjacent
Worth- area ready mix plants, and twelve more are to rivers, streams and ditches that provide vital water for
planned for 2021. These systems dramatically reduce the agricultural, residential and commercial purposes. This
amount of water used to clean ready mix trucks after system of water distribution through streams and ditches
loading, reducing both water use and runoff. was established in the 1880’s supplying water from the
Mountains to the Front Range below. Through our
Colorado numerous water rights, 3 state approved reservoirs and 4
leases, Martin Marietta operates to ensure there is no net
The West Division continues to work in cooperation with
water loss to the stream system. This means that our total
the City of Denver, the City of Aurora and the State of
water usage is returned back monthly to the stream system
Colorado to create a much-needed new fresh water
and the surrounding aquifers. In 2020, Martin Marietta
reservoirs at our facilities.These water projects include on-
returned over 130 million gallons of water back to the
going projects at our Riverbend Sand & Gravel, 35th
environment through this process.
Avenue, Ditullio, Duckworth, and Heaton facilities

Our Medina Rock & Rail water recovery pond
Hondo, Texas

While water conservation and protection is key in our Similarly, our Tyrone Georgia operation also invested $1.1
western operations, it is not neglected elsewhere. For million in its own clarifier system in 2020. This system
example, in 2020 our Northeast Quarry in Maryland consists of a 40 foot clarifier, a clarifier underflow pump,
invested $3.9 million in a new fines recovery plant which and three prefabricated containers plumbed to a series of
included a 40 foot clarifier, two belt filter presses, four settling ponds to collect the concentrated mud from the
slurry pumps, two clean water pumps, a polymer system, clarifier. It also includes a fully automated polymer mix,
advanced piping and electrical systems and process flocculant and feed system. This system is designed to
controls. By recovering 90-95 percent of the water used eliminate fine material from entering the stream running
during production and reducing the sediment load of the through the property, preserving its surface water quality.
remaining discharge, this system benefits both surface and
groundwater resources in the area.

MARTIN MARIETTA 47