California mines and minerals . »v-^-:>t^5*n^^ Suspension Bridge across Trinity River, at Junction City. Carries a Pipe-Line for 3,000 inches of Water under 500 feet Head. Bridge is 350 feet Span. Cables are 620 feet long, 5 inches in diameter, and weigh 11 tons each. the success of some dredging enterprises has led others into thebusiness, and it is now on the increase. The improved machinery isthe reason of this renewal of dredging operations. Dredgers arenow being operated in this State on the Feather, Yuba, American,Klamath, Sacramento, and Trinity rivers. The greatest number is atOrovi
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California mines and minerals . »v-^-:>t^5*n^^ Suspension Bridge across Trinity River, at Junction City. Carries a Pipe-Line for 3, 000 inches of Water under 500 feet Head. Bridge is 350 feet Span. Cables are 620 feet long, 5 inches in diameter, and weigh 11 tons each. the success of some dredging enterprises has led others into thebusiness, and it is now on the increase. The improved machinery isthe reason of this renewal of dredging operations. Dredgers arenow being operated in this State on the Feather, Yuba, American, Klamath, Sacramento, and Trinity rivers. The greatest number is atOroville, Butte County, where there are six at work, and two morebeing constructed. Most of these are in the Feather River, but oneis working on gravel a mile from the river, where a hole abouttwenty-five feet deep has been dug, and in this the dredger was built THE MINERAL INDUSTRY OF CALIFORNIA 37 or placed, water enough flowing from the ground to float it. Thismachine is at work in the middle of an orchard. Some of thesedredges