11414250 South Yuba River at Langs Crossing, Near Emigrant Gap, CA Sacramento River Basin
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Water-Data Report 2011 11414250 South Yuba River at Langs Crossing, near Emigrant Gap, CA Sacramento River Basin LOCATION.--Lat 39°19′07″, long 120°39′24″ referenced to North American Datum of 1927, in SW ¼ SW ¼ sec.20, T.17 N., R.12 E., Nevada County, CA, Hydrologic Unit 18020125, on right bank, 50 ft downstream from road bridge, 0.8 mi downstream from Spaulding Nos. 1 and 2 Powerplants, and 1.6 mi northeast of Emigrant Gap. DRAINAGE AREA.--120 mi². SURFACE-WATER RECORDS PERIOD OF RECORD.--December 1965 to current year. GAGE.--Water-stage recorder. Elevation of gage is 4,432.44 ft above NGVD of 1929 (levels by Pacific Gas and Electric Co.). COOPERATION.--Records were collected by Pacific Gas and Electric Co., under general supervision of the U.S. Geological Survey, in connection with Federal Energy Regulatory Commission project no. 2310. REMARKS.--Flow regulated by Lake Spaulding (station 11414140) 0.8 mi upstream. Lake Spaulding receives water from Canyon Creek via the Bowman- Spaulding Canal (station 11416100). Most of the water is diverted out of the Yuba River just downstream from Spaulding Dam via Drum Canal (station 11414170) and South Yuba Canal (station 11414200). See schematic diagrams of South Yuba River Basin and Bear River Basin available from the California Water Science Center. EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, about 34,200 ft³/s, estimated, Jan. 1, 1997, gage height, 23.60 ft (datum then in use), from rating curve extended above 8,800 ft³/s, on basis of spillway rating at Spaulding Dam, maximum gage height, 44.42 ft (new datum), June 29, 2011; minimum daily, 2.1 ft³/s, on several days during July and September 1977. U.S. Department of the Interior Suggested citation: U.S. Geological Survey, 2012, Water-resources data for the United States, Water U.S. Geological Survey Year 2011: U.S. Geological Survey Water-Data Report WDR-US-2011, site 11414250, accessed at http://wdr.water.usgs.gov/wy2011/pdfs/11414250.2011.pdf Water-Data Report 2011 11414250 South Yuba River at Langs Crossing, near Emigrant Gap, CA—Continued DISCHARGE, CUBIC FEET PER SECOND WATER YEAR OCTOBER 2010 TO SEPTEMBER 2011 DAILY MEAN VALUES Day Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep 1 8.7 10 12 128 109 85 113 149 725 2,060 11 8.1 2 8.3 9.8 15 127 107 102 122 150 547 1,990 11 8.1 3 9.0 9.6 38 125 106 117 74 151 322 2,000 11 8.0 4 9.1 9.4 27 124 103 55 40 154 276 1,960 11 8.0 5 8.8 9.2 34 123 102 22 44 110 666 1,840 13 7.9 6 8.9 9.3 76 122 102 36 40 138 1,800 1,640 11 7.8 7 9.2 26 31 121 101 39 35 149 1,300 1,350 11 7.8 8 8.9 20 28 121 100 27 26 144 1,230 1,110 11 7.8 9 8.8 15 42 120 99 26 22 139 1,710 1,080 10 7.7 10 8.7 17 56 119 97 28 21 98 2,040 831 10 7.7 11 8.6 15 35 118 96 28 24 69 2,240 424 10 7.7 12 8.5 13 26 118 95 27 27 70 2,170 36 10 7.8 13 8.5 12 22 121 94 34 26 67 2,240 14 9.7 7.9 14 8.4 11 112 122 96 126 22 156 2,560 13 9.4 7.8 15 8.4 11 142 125 105 212 22 938 2,770 13 9.2 7.7 16 8.4 11 130 128 86 237 29 711 2,620 13 9.0 7.6 17 8.7 10 142 127 105 137 47 483 2,180 13 8.9 7.6 18 8.5 10 279 123 102 106 68 376 2,160 13 8.8 8.4 19 8.3 10 346 121 100 102 58 335 2,240 13 8.7 9.2 20 8.3 12 197 119 98 102 48 432 2,230 13 8.7 7.8 21 8.3 12 160 118 96 98 119 728 2,470 12 8.6 7.7 22 8.5 12 148 118 95 93 166 1,110 2,830 12 8.6 7.7 23 11 13 145 117 93 92 156 1,220 2,980 12 8.5 7.7 24 78 12 139 116 92 91 162 1,320 2,640 12 8.4 7.7 25 25 12 136 115 93 89 160 1,500 2,150 12 8.4 7.9 26 15 12 136 114 89 44 154 1,100 1,930 11 8.3 9.5 27 12 13 133 113 88 85 152 883 1,910 11 8.2 8.9 28 11 12 134 113 87 85 153 725 2,090 11 8.2 8.8 29 11 12 136 112 --- 85 152 639 3,430 11 8.1 8.9 30 11 12 132 113 --- 102 149 565 2,500 11 8.0 9.0 31 11 --- 129 111 --- 108 --- 612 --- 11 7.7 --- Total 374.8 372.3 3,318 3,712 2,736 2,620 2,431 15,421 58,956 16,552 293.4 242.2 Mean 12.1 12.4 107 120 97.7 84.5 81.0 497 1,965 534 9.46 8.07 Max 78 26 346 128 109 237 166 1,500 3,430 2,060 13 9.5 Min 8.3 9.2 12 111 86 22 21 67 276 11 7.7 7.6 Ac-ft 743 738 6,580 7,360 5,430 5,200 4,820 30,590 116,900 32,830 582 480 STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1966 - 2011, BY WATER YEAR (WY) Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Mean 7.76 33.8 60.4 102 78.3 76.6 85.2 356 424 66.6 6.81 6.97 Max 18.8 683 841 2,465 1,626 1,304 683 1,849 2,613 822 13.9 12.1 (WY) (1972) (1984) (2006) (1997) (1986) (1986) (2006) (2006) (1983) (1983) (2010) (2004) Min 2.68 4.51 5.44 4.51 5.58 5.10 3.41 5.29 3.05 2.34 2.43 2.73 (WY) (1978) (1978) (1977) (1976) (1977) (1977) (1977) (1977) (1977) (1977) (1977) (1977) — 2 — Water-Data Report 2011 11414250 South Yuba River at Langs Crossing, near Emigrant Gap, CA—Continued SUMMARY STATISTICS [e, estimated] Calendar Year 2010 Water Year 2011 Water Years 1966 - 2011 Annual total 39,339.2 107,028.7 Annual mean 108 293 111 Highest annual mean 448 1997 Lowest annual mean 4.35 1977 Highest daily mean 2,410 Jun 5 3,430 Jun 29 25,400 Jan 1, 1997 Lowest daily mean 7.2 Aug 21 7.6 Sep 16 2.1 Jul 15, 1977 Annual seven-day minimum 7.5 Aug 15 7.7 Sep 11 2.1 Sep 22, 1977 Maximum peak flow 4,030 Jun 29 e34,200 Jan 1, 1997 Maximum peak stage 44.42 Jun 29 a44.42 Jun 29, 2011 Annual runoff (ac-ft) 78,030 212,300 80,300 10 percent exceeds 159 1,110 104 50 percent exceeds 22 69 8.7 90 percent exceeds 8.2 8.4 5.5 a New datum 10,000 5,000 2,000 1,000 500 200 100 50 20 MEAN DISCHARGE, CUBICSECOND FEET PER 10 5 2 1 O N D J F M A M J J A S 2010 2011 — 3 — .