# //UNITED STATES GEOLOGICAL SURVEY http://water.usgs.gov/ # //NATIONAL WATER INFORMATION SYSTEM http://water.usgs.gov/data.html # //DATA ARE PROVISIONAL AND SUBJECT TO CHANGE UNTIL PUBLISHED BY USGS # //RETRIEVED: 2024-03-15 17:55:02 # //WARNING # //WARNING The stage-discharge rating provided in this file should be # //WARNING considered provisional and subject to change. Stage-discharge # //WARNING ratings change over time as the channel features that control # //WARNING the relation between stage and discharge vary. Users are # //WARNING cautioned to consider carefully the applicability of this # //WARNING rating before using it for decisions that concern personal or # //WARNING public safety or operational consequences. # //FILE TYPE="NWIS RATING" # //DATABASE NUMBER=01 DESCRIPTION=" Standard data base for this site." # //STATION AGENCY="USGS " NUMBER="06289000 " TIME_ZONE="MST" DST_FLAG=Y # //STATION NAME="Little Bighorn River at State Line nr Wyola MT" # //LABEL="Discharge (ft^3/s)" # //PARAMETER CODE="00060" # //RATING SHIFTED="20240315175502 MST" # //RATING ID="23.0" TYPE="STGQ" NAME="stage-discharge" AGING=???? # //RATING REMARKS="Rating 23.0 was developed to address scour that occured during high water of 2022 below about 3.5 ft and to better fit high flow measurements, which have consistently plotted to the left of rating 22.0. Measurements #821, 822, 824, 826, and 827 were given the most weight. Measurement 820 was given consideration but it was an 11 section poor measurement that was obtained over 3 miles downstream. Measurements #823 and 825 were mostly disregarded as it is believed that these two measurements did not represent permanent control conditions. Historic measurements #754, 787, 804, and 813 were used and/or to fill in gaps. The rating was extended to just below 2x the maximum measured discharge on the upper end and to 1.20 ft on the lower end. Both the upper and lower extensions cover the range in expected flow. The transition zone contains two minor reversals, both less than 1% and are considered negligible. Shifting will be required and a standard half house curve will be used with a merge point set to 3.00 ft, which is the top of the transition zone with a hinge point at 2.50 ft, which will allow for a smooth transition back to the base rating during the maximum amount of expected shift. " # //RATING EXPANSION="logarithmic" # //RATING OFFSET1=8.200000E-01 # //RATING_INDEP ROUNDING="????" PARAMETER="Gage height (ft)" # //RATING_DEP ROUNDING="????" PARAMETER="Discharge (ft^3/s)" # //RATING_DATETIME BEGIN=20220530093200 BZONE=-07:00 END=-------------- EZONE=--- AGING=1 # //RATING_DATETIME COMMENT="Rating 23.0 was developed to address scour that occured during high water of 2022 below about 3.5 ft and to better fit high flow measurements, which have consistently plotted to the left of rating 22.0. Measurements #821, 822, 824, 826, and 827 were given the most weight. Measurement 820 was given consideration but it was an 11 section poor measurement that was obtained over 3 miles downstream. Measurements #823 and 825 were mostly disregarded as it is believed that these two measurements did not represent permanent control conditions. Historic measurements #754, 787, 804, and 813 were used and/or to fill in gaps. The rating was extended to just below 2x the maximum measured discharge on the upper end and to 1.20 ft on the lower end. Both the upper and lower extensions cover the range in expected flow. The transition zone contains two minor reversals, both less than 1% and are considered negligible. Shifting will be required and a standard half house curve will be used with a merge point set to 3.00 ft, which is the top of the transition zone with a hinge point at 2.50 ft, which will allow for a smooth transition back to the base rating during the maximum amount of expected shift. " # //SHIFT_PREV BEGIN="20240312095723" BZONE="-07:00" END="--------------" EZONE="---" # //SHIFT_PREV STAGE1="2.50" SHIFT1="0.02" STAGE2="3.00" SHIFT2="0.00" # //SHIFT_PREV COMMENT="Scour indicated by #834, no significant event to blame scour on, prorate between visits.Use +0.02 ft for common curve with #828, 831, and 832." # //SHIFT_NEXT BEGIN="--------------" BZONE="---" END="--------------" EZONE="---" # //SHIFT_NEXT STAGE1="---" SHIFT1="---" STAGE2="---" SHIFT2="---" STAGE3="---" SHIFT3="---" # //SHIFT_NEXT COMMENT=" " INDEP SHIFT DEP STOR 16N 16N 16N 1S 1.18 0.02 3.69 1.19 0.02 3.96 1.20 0.02 4.24 * 1.21 0.02 4.53 1.22 0.02 4.83 1.23 0.02 5.15 1.24 0.02 5.48 1.25 0.02 5.82 1.26 0.02 6.18 1.27 0.02 6.54 1.28 0.02 6.93 1.29 0.02 7.32 1.30 0.02 7.73 1.31 0.02 8.16 1.32 0.02 8.59 1.33 0.02 9.05 1.34 0.02 9.51 1.35 0.02 9.99 1.36 0.02 10.49 1.37 0.02 11.00 1.38 0.02 11.53 1.39 0.02 12.08 1.40 0.02 12.63 1.41 0.02 13.21 1.42 0.02 13.80 1.43 0.02 14.41 1.44 0.02 15.03 1.45 0.02 15.68 1.46 0.02 16.33 1.47 0.02 17.01 1.48 0.02 17.70 1.49 0.02 18.41 1.50 0.02 19.14 1.51 0.02 19.88 1.52 0.02 20.65 1.53 0.02 21.43 1.54 0.02 22.23 1.55 0.02 23.05 1.56 0.02 23.89 1.57 0.02 24.74 1.58 0.02 25.62 1.59 0.02 26.51 1.60 0.02 27.43 1.61 0.02 28.36 1.62 0.02 29.31 1.63 0.02 30.29 1.64 0.02 31.28 1.65 0.02 32.29 1.66 0.02 33.33 1.67 0.02 34.38 1.68 0.02 35.45 1.69 0.02 36.55 1.70 0.02 37.67 1.71 0.02 38.81 1.72 0.02 39.96 1.73 0.02 41.15 1.74 0.02 42.35 1.75 0.02 43.57 1.76 0.02 44.82 1.77 0.02 46.09 1.78 0.02 47.38 1.79 0.02 48.69 1.80 0.02 50.03 1.81 0.02 51.39 1.82 0.02 52.77 1.83 0.02 54.18 1.84 0.02 55.61 1.85 0.02 57.06 1.86 0.02 58.53 1.87 0.02 60.03 1.88 0.02 61.56 1.89 0.02 63.10 1.90 0.02 64.68 1.91 0.02 66.27 1.92 0.02 67.89 1.93 0.02 69.54 1.94 0.02 71.21 1.95 0.02 72.90 1.96 0.02 74.62 1.97 0.02 76.37 1.98 0.02 78.14 1.99 0.02 79.94 2.00 0.02 81.76 2.01 0.02 83.61 2.02 0.02 85.48 2.03 0.02 87.38 2.04 0.02 89.31 2.05 0.02 91.27 2.06 0.02 93.25 2.07 0.02 95.25 2.08 0.02 97.29 2.09 0.02 99.35 2.10 0.02 101.44 2.11 0.02 103.55 2.12 0.02 105.70 2.13 0.02 107.87 2.14 0.02 110.07 2.15 0.02 112.29 2.16 0.02 114.55 2.17 0.02 116.83 2.18 0.02 119.14 2.19 0.02 121.48 2.20 0.02 123.85 2.21 0.02 126.25 2.22 0.02 128.68 2.23 0.02 131.13 2.24 0.02 133.62 2.25 0.02 136.13 2.26 0.02 138.68 2.27 0.02 141.25 2.28 0.02 143.85 2.29 0.02 146.49 2.30 0.02 149.15 2.31 0.02 151.84 2.32 0.02 154.57 2.33 0.02 157.32 2.34 0.02 160.11 2.35 0.02 162.92 2.36 0.02 165.77 2.37 0.02 168.65 2.38 0.02 171.56 2.39 0.02 174.50 2.40 0.02 177.47 2.41 0.02 180.48 2.42 0.02 183.51 2.43 0.02 186.58 2.44 0.02 189.68 2.45 0.02 192.81 2.46 0.02 195.98 2.47 0.02 199.17 2.48 0.02 202.40 2.49 0.02 205.66 2.50 0.02 208.96 2.51 0.02 212.15 2.52 0.02 215.38 2.53 0.02 218.63 2.54 0.02 221.92 2.55 0.02 225.24 2.56 0.02 228.58 2.57 0.02 231.96 2.58 0.02 235.37 2.59 0.02 238.82 2.60 0.02 242.29 2.61 0.02 245.79 2.62 0.02 249.33 2.63 0.01 252.90 2.64 0.01 256.50 2.65 0.01 260.13 2.66 0.01 263.80 2.67 0.01 267.49 2.68 0.01 271.22 2.69 0.01 274.98 2.70 0.01 278.78 2.71 0.01 282.60 2.72 0.01 286.46 2.73 0.01 290.36 2.74 0.01 294.28 2.75 0.01 298.24 2.76 0.01 302.24 2.77 0.01 306.26 2.78 0.01 310.32 2.79 0.01 314.41 2.80 0.01 318.19 * 2.81 0.01 321.92 2.82 0.01 325.68 2.83 0.01 329.46 2.84 0.01 333.27 2.85 0.01 337.10 2.86 0.01 340.96 2.87 0.01 344.84 2.88 0.00 348.75 2.89 0.00 352.69 2.90 0.00 356.72 * 2.91 0.00 360.85 2.92 0.00 365.02 2.93 0.00 369.22 2.94 0.00 373.44 2.95 0.00 377.70 2.96 0.00 381.98 2.97 0.00 386.29 2.98 0.00 390.63 2.99 0.00 395.00 3.00 0.00 399.40 * 3.01 0.00 403.49 3.02 0.00 407.60 3.03 0.00 411.73 3.04 0.00 415.89 3.05 0.00 420.07 3.06 0.00 424.27 3.07 0.00 428.50 3.08 0.00 432.75 3.09 0.00 437.02 3.10 0.00 441.31 3.11 0.00 445.63 3.12 0.00 449.97 3.13 0.00 454.34 3.14 0.00 458.72 3.15 0.00 463.14 3.16 0.00 467.57 3.17 0.00 472.03 3.18 0.00 476.51 3.19 0.00 481.01 3.20 0.00 485.54 3.21 0.00 490.09 3.22 0.00 494.66 3.23 0.00 499.26 3.24 0.00 503.88 3.25 0.00 508.53 3.26 0.00 513.20 3.27 0.00 517.89 3.28 0.00 522.60 3.29 0.00 527.34 3.30 0.00 532.10 3.31 0.00 536.89 3.32 0.00 541.70 3.33 0.00 546.53 3.34 0.00 551.39 3.35 0.00 556.27 3.36 0.00 561.17 3.37 0.00 566.10 3.38 0.00 571.05 3.39 0.00 576.02 3.40 0.00 581.02 3.41 0.00 586.05 3.42 0.00 591.09 3.43 0.00 596.16 3.44 0.00 601.26 3.45 0.00 606.37 3.46 0.00 611.52 3.47 0.00 616.68 3.48 0.00 621.87 3.49 0.00 627.09 3.50 0.00 632.32 3.51 0.00 637.58 3.52 0.00 642.87 3.53 0.00 648.18 3.54 0.00 653.51 3.55 0.00 658.87 3.56 0.00 664.25 3.57 0.00 669.66 3.58 0.00 675.09 3.59 0.00 680.54 3.60 0.00 686.02 3.61 0.00 691.52 3.62 0.00 697.05 3.63 0.00 702.60 3.64 0.00 708.18 3.65 0.00 713.78 3.66 0.00 719.40 3.67 0.00 725.05 3.68 0.00 730.72 3.69 0.00 736.42 3.70 0.00 742.14 3.71 0.00 747.89 3.72 0.00 753.66 3.73 0.00 759.45 3.74 0.00 765.27 3.75 0.00 771.11 3.76 0.00 776.98 3.77 0.00 782.87 3.78 0.00 788.79 3.79 0.00 794.73 3.80 0.00 800.70 3.81 0.00 806.69 3.82 0.00 812.70 3.83 0.00 818.74 3.84 0.00 824.81 3.85 0.00 830.90 3.86 0.00 837.01 3.87 0.00 843.15 3.88 0.00 849.31 3.89 0.00 855.50 3.90 0.00 861.71 3.91 0.00 867.95 3.92 0.00 874.21 3.93 0.00 880.50 3.94 0.00 886.81 3.95 0.00 893.15 3.96 0.00 899.51 3.97 0.00 905.89 3.98 0.00 912.30 3.99 0.00 918.74 4.00 0.00 925.20 4.01 0.00 931.69 4.02 0.00 938.20 4.03 0.00 944.73 4.04 0.00 951.30 4.05 0.00 957.88 4.06 0.00 964.49 4.07 0.00 971.13 4.08 0.00 977.79 4.09 0.00 984.47 4.10 0.00 991.19 4.11 0.00 997.92 4.12 0.00 1004.68 4.13 0.00 1011.47 4.14 0.00 1018.28 4.15 0.00 1025.12 4.16 0.00 1031.98 4.17 0.00 1038.87 4.18 0.00 1045.78 4.19 0.00 1052.72 4.20 0.00 1059.68 4.21 0.00 1066.67 4.22 0.00 1073.68 4.23 0.00 1080.72 4.24 0.00 1087.79 4.25 0.00 1094.87 4.26 0.00 1101.99 4.27 0.00 1109.13 4.28 0.00 1116.30 4.29 0.00 1123.49 4.30 0.00 1130.70 4.31 0.00 1137.94 4.32 0.00 1145.21 4.33 0.00 1152.51 4.34 0.00 1159.82 4.35 0.00 1167.17 4.36 0.00 1174.54 4.37 0.00 1181.93 4.38 0.00 1189.35 4.39 0.00 1196.80 4.40 0.00 1204.27 4.41 0.00 1211.77 4.42 0.00 1219.29 4.43 0.00 1226.84 4.44 0.00 1234.41 4.45 0.00 1242.01 4.46 0.00 1249.64 4.47 0.00 1257.29 4.48 0.00 1264.97 4.49 0.00 1272.67 4.50 0.00 1280.40 4.51 0.00 1288.15 4.52 0.00 1295.93 4.53 0.00 1303.74 4.54 0.00 1311.57 4.55 0.00 1319.43 4.56 0.00 1327.31 4.57 0.00 1335.22 4.58 0.00 1343.16 4.59 0.00 1351.12 4.60 0.00 1359.10 4.61 0.00 1367.12 4.62 0.00 1375.16 4.63 0.00 1383.22 4.64 0.00 1391.31 4.65 0.00 1399.43 4.66 0.00 1407.57 4.67 0.00 1415.74 4.68 0.00 1423.93 4.69 0.00 1432.15 4.70 0.00 1440.40 4.71 0.00 1448.67 4.72 0.00 1456.97 4.73 0.00 1465.30 4.74 0.00 1473.65 4.75 0.00 1482.03 4.76 0.00 1490.43 4.77 0.00 1498.86 4.78 0.00 1507.32 4.79 0.00 1515.80 4.80 0.00 1524.31 4.81 0.00 1532.84 4.82 0.00 1541.40 4.83 0.00 1549.99 4.84 0.00 1558.60 4.85 0.00 1567.24 4.86 0.00 1575.91 4.87 0.00 1584.60 4.88 0.00 1593.32 4.89 0.00 1602.06 4.90 0.00 1610.83 4.91 0.00 1619.63 4.92 0.00 1628.46 4.93 0.00 1637.31 4.94 0.00 1646.18 4.95 0.00 1655.09 4.96 0.00 1664.02 4.97 0.00 1672.97 4.98 0.00 1681.96 4.99 0.00 1690.96 5.00 0.00 1700.00 *