 The mine has continued to issue small amounts of toxic tailings, including arsenic, cadmium, lead, and mercury, remediation for which the Trabuco Ranger District of the Cleveland National Forest began toxic cleanup in 2008.In 1883 Polish actress Helena Modjeska purchased the Pleasant family's homestead ranch in Santiago Canyon near the mouth of Harding Creek, the Santiago's first large tributary.She commissioned the renowned New York architect Stanford White to design a country manor house, expanding the Pleasant's house into the landmark Modjeska House in the Arden gardens, within present-day Modjeska Canyon.