Mine cleanup will increase Greenhorn Road traffic | TheUnion.com

Mine cleanup will increase Greenhorn Road traffic

More trucks are expected along Greenhorn Road and Tensy Lane through mid-December due to the cleanup of the old Lava Cap Mine east of Grass Valley.

The U.S. Environmental Protection Agency will be trucking large quantities of rock along the streets from 7 a.m. to 5 p.m., Monday through Saturday. The rock will be used to stabilize the steep banks of Little Clipper Creek, which was polluted by mine tailings.

The old mine area was declared a Superfund cleanup site by the EPA in 1997 after 10,000 cubic yards of arsenic and lead-tainted tailings fell into the creek following a log dam failure. The gold and silver mine operated sporadically from 1861 to 1943.

Only one well in the area has tested for high levels of arsenic in recent years, and it responded to treatment, according to the EPA office in San Francisco. It is believed the dam failure also caused Lost Lake to be polluted, but the lake has no public access.


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