SLURRY TRENCH Dundalk Marine Terminal Baltimore, Maryland When A 96-inch diameter storm drain at the Dundalk Marine T erminal in Baltimore, MD was discovered to have ovalized and was determined to be close to failure. Further evaluation showed that the drain line had been installed through chromite ore processing residue (COPR) materials. COPR is known to expand with time. The increase in soil volume had, in turn, increased the lateral pressure o

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