# //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: 2023-09-22 17:45:03 # //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="06172310 " TIME_ZONE="MST" DST_FLAG=Y # //STATION NAME="Milk River at Tampico MT" # //LABEL="Discharge ft^3/s" # //PARAMETER CODE="00060" # //RATING ID="9.0" TYPE="STGQ" NAME="stage-discharge" AGING=Working # //RATING REMARKS="Rating 9.0 was developed Sep. 22, 2023 for channel changes and high flow measurements during 2023. The lower end was revised using an offset of 1.40 ft to straighten the lower end, remove some concavity, and to continue a base scoured condition. The intermediate portion of the rating was also given more weight to the scoured side but a fill condition exists post flooding due to debris and/or sedimentation. This is likely a temporary condition. The upper breakpoint was retained at 24.00 ft and 8000 cfs. The upper end was revised based on recent high flow measurement 357 and drawn more to the right extending to 28.30 ft and 24,060 cfs using a straight line logarithmic extension. This is just above historical and present year flood stages. Several descripto points were added on the upper end using an offset of 9.00 ft to smooth rating to the right as it goes into overbank conditions upstream of the gage." # //RATING EXPANSION="logarithmic" # //RATING BREAKPOINT1=2.400000E+01 # //RATING OFFSET1=1.400000E+00 OFFSET2=9.000000E+00 # //RATING_INDEP ROUNDING="????" PARAMETER="Gage height (ft)" # //RATING_DEP ROUNDING="????" PARAMETER="Discharge (ft^3/s)" # //RATING_DATETIME BEGIN=20230412031500 BZONE=-07:00 END=-------------- EZONE=--- AGING=Working # //RATING_DATETIME COMMENT="Started new rating as the bank overflow portion of the rating differs from 24 ft and above." INDEP DEP STOR 16N 16N 1S 1.4000000E+00 0.0000000E+00 * 1.4100000E+00 1.1000000E-01 * 2.3300000E+00 9.7700000E+01 * 3.4500000E+00 2.9350000E+02 * 4.8000000E+00 5.8100000E+02 * 1.4360000E+01 3.4700000E+03 * 1.8400000E+01 5.0000000E+03 * 2.4000000E+01 8.0000000E+03 * 2.4820000E+01 8.5423500E+03 * 2.5150000E+01 8.8780800E+03 * 2.5360000E+01 9.2310500E+03 * 2.5730000E+01 1.0105030E+04 * 2.8300000E+01 2.4060000E+04 *