84 <strong>Ground</strong>-<strong>Water</strong> <strong>Hydrology</strong> <strong>of</strong> <strong>the</strong> <strong>Upper</strong> <strong>Klamath</strong> <strong>Basin</strong>, <strong>Oregon</strong> <strong>and</strong> California Table 6. Estimated ground-water discharge to principal stream reaches in <strong>the</strong> upper <strong>Klamath</strong> <strong>Basin</strong>, <strong>Oregon</strong> <strong>and</strong> California.—Continued [Reach: River miles in Reach column are from <strong>Oregon</strong> <strong>Water</strong> Resources Department <strong>Klamath</strong> Drainage <strong>Basin</strong> Map, Map No. 14.6, 1971. Confidence level: Confidence levels represent a subjective assessment <strong>of</strong> <strong>the</strong> interval (plus or minus) that has a 95 percent probability <strong>of</strong> containing <strong>the</strong> true value. Confidence level categories are: 1, 10 percent; 2, 20 percent; 3, 30 percent; 4, 50 percent; 5, data insufficient to assess uncertainty. Subtotals rounded to two significant figures. Unless o<strong>the</strong>rwise noted, values were derived by taking <strong>the</strong> average <strong>of</strong> estimated discharge in <strong>the</strong> fall (Sept, Oct, Nov). USGS synoptic measurement data from Leonard <strong>and</strong> Harris (1974). Abbreviations: BOR, Bureau <strong>of</strong> Reclamation; CDWR, California Department <strong>of</strong> <strong>Water</strong> Resources; Cr, Creek; ft 3 /s, cubic feet per second; Hwy, Highway; mi, mile; NA, not applicable; NPS, National Park Service; OWRD, <strong>Oregon</strong> <strong>Water</strong> Resources Department; R, River; Res, Reservoir; RM, river mile; RR, rail road; USFS, U.S. Forest Service; USGS, U.S. Geological Survey] Number Stream name Reach Estimated gain (+) or loss (-) (ft 3 /s) Data source Period <strong>of</strong> record Methods Remarks Confidence level 81 <strong>Klamath</strong> River 82 Spencer Creek Keno Dam (RM 230.5) to below JC Boyle powerplant (RM 218.1) 190 USGS gage <strong>and</strong> Pacific Corp. Reservoir data 10/1967– 10/1987, 10/1989– 09/2001 Headwaters to mouth 27 USGS gage 10/1925– 09/1931 83 Fall Creek Headwaters to mouth 36 USGS gage 07/1928– 09/1959 84 Jenny Creek Headwaters to mouth 9 USGS gage 10/1922– 09/1928 85 <strong>Klamath</strong> River Below JC Boyle powerplant (RM 218.1) to Iron Gate Dam 92 USGS gage <strong>and</strong> Pacific Corp. Reservoir data 10/1967– 09/2000 Average (rounded). Mass balance. Derived from monthly mean discharge <strong>and</strong> reservoir content data. Excludes gains from Spencer Cr. Index regression to Rogue River above Prospect, Oreg. (USGS Site 14328000) Index regression to McCloud R near McCloud CA (USGS Site 11367500) Index regression to South Fork Little Butte Cr near Lake Creek, Oreg. (USGS Site 14341500) Average. Mass balance from monthly mean discharge, reservoir content data, <strong>and</strong> tributary flow listed in table. Excludes gains from tributaries listed in table. USGS gages: (11509500) <strong>Klamath</strong> River at Keno, Oreg. <strong>and</strong> (11510700) <strong>Klamath</strong> River below JC Boyle powerplant near Keno, Oreg. Minus gains estimate from Spencer Creek. USGS Site 11510000. Restarted in 2002 by OWRD USGS Site 11512000 2 USGS Site 11516500 3 <strong>Klamath</strong> River below JC Boyle powerplant near Keno, Oreg. (USGS Site 11510700) to <strong>Klamath</strong> River below Iron Gate Dam, Calif. (USGS Site 11516530). Minus gain estimates from tributaries. 2 3 3 Subtotal for <strong>Klamath</strong> River below Keno 350
Manuscript approved for publication, April 4, 2007 Prepared by <strong>the</strong> USGS Publishing Network, Publishing Service Center, Tacoma, Bill Gibbs Donita Parker Linda Rogers Debra Grillo Ginger Renslow Bobbie Jo Richey For more information concerning <strong>the</strong> research in this report, contact <strong>the</strong> <strong>Oregon</strong> <strong>Water</strong> Science Center Director U.S. Geological Survey 10615 S.E. Cherry Blossom Dr. Portl<strong>and</strong>, OR 97216 http://or.water.usgs.gov
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