Doe Run Resources Corp. will clean up 4,100 residential properties at a lead-contaminated Superfund site near St. Louis under a consent decree with the Department of Justice and the state of Missouri, DOJ said April 4.

The consent decree concerns residential properties located within the Big River Mine Tailings Superfund Site in St. Francois County, which makes up part of Missouri’s “Old Lead Belt,” a historic lead mining region.

Between 9.3 percent and 16.7 percent of the children living within the site’s boundaries have elevated blood-lead concentrations, according to a DOJ statement.

Doe Run was the last major lead...