. Appendix to the Journals of the Senate and Assembly of the ... session of the Legislature of the State of California. rphic sandstone, though in part it is yellowish brown where oxidized. The formation is massive and more or less fractured. Pieces up to 3 or 4 feet across are shipped —as large as can be handled conveniently by the steam shovel. There is a small amount of clay on some of the fractures, and there is clay and shale at the north end of the sandstone. The material is loaded MARIN COUNTY. 253 by tlie steam shovels into si(le-tippin«4 (lump cars aud run out onto thc^loading pier (s
. Appendix to the Journals of the Senate and Assembly of the ... session of the Legislature of the State of California. rphic sandstone, though in part it is yellowish brown where oxidized. The formation is massive and more or less fractured. Pieces up to 3 or 4 feet across are shipped —as large as can be handled conveniently by the steam shovel. There is a small amount of clay on some of the fractures, and there is clay and shale at the north end of the sandstone. The material is loaded MARIN COUNTY. 253 by tlie steam shovels into si(le-tippin«4 (lump cars aud run out onto thc^loading pier (see photos Nos. 114 and 115) in trains by small steamlocomotives. There it is dumped onto a grizzly with 2J-inch coarse drops into a skip with bottom discharge in which it istransferred to the barges alongside bj^ an overhead traveling electriccrane of seven tons capacity. The fines are elevated by two belt con-veyors (each driven by a motor) to the w^aste bin fromwhich they are hauled and dumped along the shore. The company hasin service twelve skip barges (see foreground of photo No. 114),. Photo No. 115. Daniel Contracting Companys pier and quarry at San Pedro Point, Marin County, California. two deck barges (for large single stones), two bottom dump (notebarge B in background of photo No. 114) and two side-dump first named hold 40 to 50 skips of four cubic yards capacityeach—a barge capacity of 200 to 300 tons. The bottom dump bargescarry 900 tons each, and the side dumps about 700 tons. These lasttwo classes are used for subaqueous dumping, and the skips when thefill has reached above the level of the water or for fills ashore. The equipment, which has a rated capacity to ship 4000 tons per twoten-hour shifts, besides that already noted, includes: three steamshovels (with two cubic yard buckets) ; eight dinky locomotives (sixin service) ; air compressor, 150 , electric driven. Crude oil fuel isused. Seventy-five to 90 men are employe
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Keywords: ., bookauthorcaliforn, bookcentury1800, bookdecade1850, bookyear1853
