Page 69 - 2022 Sustainability Report

ENVIRONMENTAL STEWARDSHIP

Biodiversity and Land Use

We own or lease significant land holdings on which we
operate our businesses. We are committed to minimizing
operational impacts on local ecosystems’ biodiversity.
In addition to complying with applicable laws and
regulations, we integrate various protection measures
into the way we operate, as described below. Further,
our environmental management practices consider
Prebble Jumping Mouse
the relevant ecosystem throughout the lifecycle of an
operation, including reclamation.
Louisiana Pearl Shell Mussels
Habitat and Species Protection
Similarly, our Stillwater / West Lakeland, Minnesota
Throughout the duration of our operations at a particular operations have been engaged in the protection of osprey
location, we take a variety of steps to mitigate impacts nesting sites for many years. The facility first participated in
on habitats and species and to restore disturbed an osprey nest relocation program with the Three Rivers Park
ecosystems. Our environmental staff works in concert District and Xcel Energy in 2007. This lead to the installation
with our mine planners and operations teams to ensure and maintenance of dedicated poles for osprey nesting
sensitive areas and species are not impacted. We habitat located at the site, which is near the St. Croix River.
follow the U.S. Fish and Wildlife Service guidelines and
regulations for operations near endangered or threatened
species, and we obtain required permits and conduct
necessary mitigation in connection with our activities in
or near waters of the United States.

An excellent example of this practice can be found at our
Woodworth facility in Louisiana which borders Bayou Clear,
home to the endangered Louisiana Pearl Shell Mussel. This
mussel is restricted to only two river drainages in central
Louisiana, and as a result had declined by over 80% during
the last few decades.

As both sedimentation and water diversion could impact
the Pearl Shell Mussel, during construction of the Osprey, St. Cloud MN
Woodworth facility a number of steps to prevent such
impacts were taken including the use of substantial buffers Likewise, at our St. Cloud Minnesota Quarry, potential
between operations and stream banks; levees constructed habitat for the endangered Blanding’s turtle has been
on a 3-1 slope; and the use of matting, silt fencing, and identified. Accordingly, as expansion and other activities
seeding to prevent sedimentation from erosion. The facility occur at the site, the Company will conduct observation
also installed a closed loop water recycling system to for these turtles. Contractors and employees are provided
prevent any discharges of process water. In part due to the MNDNR Blanding’s Turtle Flyer to assist them in
these efforts, during the last mussel survey conducted in identifying this species. If turtles are encountered, the first
late 2019 by the Louisiana Department of Fish and Wildlife, list of recommendations in the MNDNR Blanding’s turtle
it was found the numbers of mussels has increased. fact sheet are followed. In addition, erosion control
materials used at this site must remain free of products
with plastic mesh netting or other plastic components.

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