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Tualatin River Basin

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124o45' 124o45' 46o00' COLUMBIA COLUMBIA Scappoose 14205400 MULTNOMAH 14211820 WASHINGTON 14144700 RIVER Portland 14211720 Dilley 14211499 14211814 14206900 14211500 14202980 Cr Gresham Tualatin Beaverton Johnson 14211400 14203500 14211550 Milwaukie Kelley Gaston 14206950 14211315 Creek Sandy North Yamhill River 14211010 14195500 14207770 14207500 14197900 14207740 Oregon 14196001 RIVER City Estacada 14210000 TILLAMOOK River R 14200000 Clackamas 14194150 14202000 McMinnville Molalla 14199704 YAMHILL Pudding South Woodburn 14201340 14209700 Yamhill CLACKAMAS 14201300 Mount 14209500 Angel Scotts River 14208600 WILLAMETTE Mills 14209000 14208700 Keizer Little Abiqua POLK River 14191000 Salem 14198400 14200400 River Luckiamute River Mehama 14182500 14190500 14179100 Jefferson 14183000 Niagara Suver North 14179000 Santiam Detroit 14189000 14181500 14188800 14178000 14188850 BENTON LINN Blowout River 14188610 14180300 Lacomb Quartzville Creek Cr Lebanon 14185900 14187500 14187600 Waterloo South 14187200 Cascadia Foster 14185000 Santiam 14187000 River 44o15' 0 10 20 30 40 MILES 0 10 20 30 40 KILOMETERS EXPLANATION 14183000 Stream-gaging station 14192015 Water-quality data collection site OREGON 14187200 Stream-gaging station and water-quality data collection site Figure 25. Location of surface-water and water-quality stations in the Willamette River Basin, downstream from the Luckiamute River. 432 14144700 COLUMBIA RIVER RM 106.5 14211820 14211814 RM RM 0.2 Fairview RM 3.1 Fairview 1.2 Columbia Slough Lake Creek 14211720 RM 12.8 Creek Creek Crystal 14205400 Springs RM 12.3 Creek 14211550 14211500 14211400 Timothy Bronson Bronson RM RM 0.7 RM 10.2 RM 16.3 Lake 18.5 Johnson Henry 14208600 Hagg Beaverton Creek Creek RM 15.8 14211499 14208700 Lake 14211315 RM 1.0 RM 0.1 RM 15.5 Tryon Creek 14209000 East Fork East Fork Dairy Creek West Fork Dairy Creek Dairy Creek Fork West RM 6.7 Fork Fork Creek Creek Kelley Kelley 14202980 14211010 RM 4.8 RM 1.6 14210000 14209500 Oak Grove RM 23.1 14206900 RM RM 47.8 Rock Creek Creek Rock 24.8 Fanno Creek Creek Fanno RM 11.9 Clackamas River 14207770 14209700 Creek Creek RM 26.2 RM 1.2 Scoggins Scoggins 14207740 Dairy Creek Dairy Creek Gales Creek Gales Creek 14206950 RM 26.8 RM 1.1 RM 14203500 Tualatin River 14207500 28.4 RM 58.8 RM 1.8 Fish Creek Creek Nate Bull Creek Creek Creek 14199704 14198400 Haskins 14195500 RM 0.9 RM 0.4 Creek RM 5.1 14200000 Molalla RM 6.0 River Reservoir Haskins Creek RM 14196001 35.7 Completed RM 5.0 1951 14197900 14202000 RM 50 RM 8.1 14201340 RM 23.4 North Yamhill River North Yamhill 14201300 14194150 RM 0.5 South Yamhill River RM 5.6 RM Zollner 54.9 Creek Abiqua Creek EXPLANATION Pudding River 14195500 Stream-gaging station 14211720 Water-quality data collection site 14207500 Stream-gaging station and water- quality data collection site WILLAMETTE RIVER RM 12.8 River mile Creek Stream— Arrow shows direction Little Abiqua of flow 14191000 RM 84.2 14190500 Luckiamute River RM 13.5 RM 107.5 RM Santiam River 109.0 See Figure 26. See Figure 23. Figure 27. Schematic diagram showing gaging stations in the Willamette River Basin, from the Luckiamute River downstream to the mouth. 543 WILLAMETTE RIVER BASIN 14202980 SCOGGINS CREEK BELOW HENRY HAGG LAKE, NEAR GASTON, OR 1 1 LOCATION.--Lat 45°28'10", long 123°11'56", in SE ⁄4 NE ⁄4 sec.20, T.1 S., R.4 W., Washington County, Hydrologic Unit 17090010, on left bank 600 ft downstream from Scoggins Dam, 800 ft upstream from small left bank tributary, 3.7 mi northwest of Gaston and at mile 4.8. DRAINAGE AREA.--38.8 mi2. PERIOD OF RECORD.--January 1975 to current year. GAGE.--Water-stage recorder. Datum of gage is 187.48 ft above NGVD of 1929. REMARKS.--Records good except for estimated daily discharges,which are fair. Flow completely regulated by Henry Hagg Lake since January 1975. Discharge not adjusted for storage or release from Henry Hagg Lake as evaporation from reservoir at times exceeds natural flow. AVERAGE DISCHARGE.--30 years (water years 1976-2005), 112 ft3/s, 80,920 acre-ft, unadjusted. EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 2,210 ft3/s Apr. 23, 1996, gage height, 16.88 ft; minimum discharge, 0.72 ft3/s Nov. 4, 5, 1996, Dec. 16, 1997. EXTREMES FOR CURRENT YEAR.--Maximum discharge, 306 ft3/s Jan. 20, gage height, 6.85 ft; minimum discharge, 8.8 ft3/s Nov. 30. DISCHARGE, CUBIC FEET PER SECOND WATER YEAR OCTOBER 2004 TO SEPTEMBER 2005 DAILY MEAN VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 108 20 11 10 12 11 10 65 59 59 201 154 2 115 23 11 10 12 11 10 65 41 56 197 162 3 115 22 11 10 11 11 10 65 34 56 207 162 4 122 20 11 10 11 11 10 76 38 56 223 162 5 e130 21 11 10 11 11 10 82 38 56 228 162 6 e130 22 11 10 11 11 10 95 45 56 223 155 7 125 22 11 10 11 11 10 98 81 106 223 151 8 104 21 12 10 11 9.9 10 85 94 147 219 151 9 103 21 11 10 11 9.9 10 93 58 149 216 140 10 103 21 11 10 11 9.9 10 108 45 149 215 132 11 85 21 11 10 11 9.9 10 73 40 143 204 132 12 72 21 11 10 11 9.9 10 45 40 132 192 125 13 106 21 11 10 11 9.9 10 42 34 132 188 117 14 123 21 11 10 11 9.9 10 47 31 140 188 125 15 120 21 11 10 11 9.9 10 47 31 158 187 134 16 120 21 11 10 11 9.9 10 80 33 168 188 138 17 120 21 11 11 11 9.9 11 131 44 168 196 138 18 95 21 11 56 11 9.9 11 151 51 172 203 137 19 69 21 11 102 11 10 11 151 51 189 210 140 20 58 21 11 242 11 10 11 138 50 202 212 153 21 58 21 11 302 11 9.9 11 124 82 205 212 164 22 58 21 10 300 11 9.9 11 125 81 199 205 163 23 58 21 10 299 11 9.9 11 125 77 199 195 157 24 58 21 10 181 11 9.9 11 100 71 199 189 157 25 45 21 10 72 11 9.9 73 81 64 195 187 157 26 29 21 10 34 11 11 91 81 64 195 192 156 27 38 21 10 21 11 11 78 68 64 206 197 161 28 38 21 10 15 11 11 78 59 64 217 197 165 29 31 21 10 12 --- 11 70 59 61 213 186 158 30 19 17 10 12 --- 10 64 59 58 207 145 155 31 19 --- 10 12 --- 10 --- 59 --- 206 136 --- TOTAL 2,574 629 332 1,831 310 319.4 702 2,677 1,624 4,735 6,161 4,463 MEAN 83.0 21.0 10.7 59.1 11.1 10.3 23.4 86.4 54.1 153 199 149 MAX 130 23 12 302 12 11 91 151 94 217 228 165 MIN 19 17 10 10 11 9.9 10 42 31 56 136 117 AC-FT 5,110 1,250 659 3,630 615 634 1,390 5,310 3,220 9,390 12,220 8,850 STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1976 - 2005, BY WATER YEAR (WY) MEAN 94.8 62.1 144 169 131 124 78.6 58.1 63.8 128 155 130 MAX 155 233 571 700 720 326 272 122 121 201 216 206 (WY) (1980) (1985) (1996) (1997) (1999) (1983) (1996) (1996) (1992) (1994) (1996) (1993) MIN 26.2 16.7 10.2 9.69 9.50 9.98 9.91 19.9 14.3 52.3 83.4 72.9 (WY) (1978) (1988) (2001) (2001) (1977) (2001) (2001) (1977) (1977) (1993) (1977) (1977) SUMMARY STATISTICS FOR 2004 CALENDAR YEAR FOR 2005 WATER YEAR WATER YEARS 1976 - 2005 ANNUAL TOTAL 29,598.6 26,357.4 ANNUAL MEAN 80.9 72.2 112 HIGHEST ANNUAL MEAN 217 1999 LOWEST ANNUAL MEAN 40.4 1977 HIGHEST DAILY MEAN 411 Feb 8 302 Jan 21 1,940 Jan 3, 1997 LOWEST DAILY MEAN 9.7 Jan 29 9.9 Mar 8 3.4 Dec 2, 2001 ANNUAL SEVEN-DAY MINIMUM 10 Dec 22 9.9 Mar 8 5.5 Dec 1, 2001 ANNUAL RUNOFF (AC-FT) 58,710 52,280 80,920 10 PERCENT EXCEEDS 203 193 211 50 PERCENT EXCEEDS 51 41 77 90 PERCENT EXCEEDS 11 10 12 581 WILLAMETTE RIVER BASIN 14202980 SCOGGINS CREEK BELOW HENRY HAGG LAKE, NEAR GASTON, OR—Continued 2005 Water Year WILLAMETTE RIVER BASIN 14202980 SCOGGINS CK BLW HENRY HAGG LAKE, NR GASTON, OR o o Latitude: 45 28 ' 10" Longitude: 123 11 ' 56" Hydrologic Unit Code: 17090010 Washington County Datum: 187.48 feet Drainage Area: 38.8m i 2 1,000 Daily Mean Discharge 100 10 Streamflow (cfs) (cfs) Streamflow 1 Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Monthly Statistics _ 800 Monthly Mean of Current Water Year and Max, Mean, and Min Monthly Mean for 1976 2005 600 400 200 Streamflow (cfs) (cfs) Streamflow 0 Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep 250 Annual Mean Streamflow 200 150 100 50 Streamflow (cfs) (cfs) Streamflow 0 2004 1992 1998 2002 1976 1978 1980 1984 1986 1996 1990 2000 1982 1988 1994 60 Annual Minimum 7-Day Average Streamflow 50 40 30 20 10 Streamflow (cfs) (cfs) Streamflow 0 1978 1984 1990 1998 2002 2004 1980 1986 1992 1996 1976 1982 1988 1994 2000 2,500 Annual Peak Streamflow 2,000 1,500 1,000 500 Streamflow (cfs) (cfs) Streamflow 0 2003 1975 1983 1979 1987 1989 2005 1995 1997 1999 1977 1981 1985 1991 1993 2001 e Estimated 582 WILLAMETTE RIVER BASIN 14203500 TUALATIN RIVER NEAR DILLEY, OR 1 1 LOCATION.--Lat 45°28'30", long 123°07'23", in NE ⁄4 NW ⁄4 sec.24, T.1 S., R.4 W., Washington County, Hydrologic Unit 17090010, on right bank 5 ft upstream from highway bridge, 1.0 mi south of Dilley, 1.2 mi downstream from Scoggins Creek and at mile 58.8.
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