A history marker at the intersection of California Rte. 3 and East Side Road notes that giant bucket dredges “turned the Trinity River upside down for (more than) … 50 years, leaving behind mounds of rock trailings.” One of them, the Trinity Dredge, was constructed in 1912 at the Blakemore Ranch and powered by electricity produced in Minersville by water from the Van Matre Ranch.