sentences:  Ravine mining began in the area in 1849, with surface diggings discovered around 1851.More sophisticated mining practices started in early 1852, with the building of a ditch from Shady Creek by the Messrs, Twist, Wadsworth, Williams, Spurry, and the Eddy brothers.Another Shady Creek ditch was built in 1853, brought in by the Grizzly Water Company and principally owned by Charles Marsh and W.M.