Water Supply and Irrigation Papers of the United States Geological Survey . f the two creeks mentioned (Deer and Dry) becomesinsignificant in the late summer and early autumn. As they merge into the valley the Sierra foothills have an elevationof about 100 feet above tide. The watershed rises gently, in roundedand broken mountains, to the crest of the Sierra, which at the head-waters of the Yuba is at a mean elevation of about 8,200 feet, withpeaks rising to a height of 9,100 feet. From Mount Lincoln—a peakcommon to the watersheds of Yuba, American, and Truckee rivers—to a point about 2| miles
Water Supply and Irrigation Papers of the United States Geological Survey . f the two creeks mentioned (Deer and Dry) becomesinsignificant in the late summer and early autumn. As they merge into the valley the Sierra foothills have an elevationof about 100 feet above tide. The watershed rises gently, in roundedand broken mountains, to the crest of the Sierra, which at the head-waters of the Yuba is at a mean elevation of about 8,200 feet, withpeaks rising to a height of 9,100 feet. From Mount Lincoln—a peakcommon to the watersheds of Yuba, American, and Truckee rivers—to a point about 2| miles northeast of Mount Webber, the summit ofthe Sierra divides the watershed of Yuba River from that of TruckeeRiver, which discharges into Humboldt Basin. Farther north fromMount Webber there is a secondary crest which divides the water-sheds of Yuba and Feather rivers, the watershed of the latter streamreaching farther east, to a less elevated divide in which the passesare lower than those of the easterly crest. U. S. GE0L03ICAL SURVEY WATER-SUPPLY PAPER NO. 46 PL. IV. A. HEAD OF SOUTH FORK OF YUBA RIVER AND LAKE SPAULDING.
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