# //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: 2025-12-16 20:30:02 # //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="06091700 " TIME_ZONE="MST" DST_FLAG=Y # //STATION NAME="Two Medicine River bl South Fork nr Browning MT" # //LABEL="Discharge ft^3/s" # //PARAMETER CODE="00060" # //RATING ID="14.0" TYPE="STGQ" NAME="stage-discharge" AGING=Working # //RATING REMARKS="Adjusting for new rating (soon to be 14.0). Utilized majority of QMs forward from 2022 HW season to develop lower end. Upper rating is developed fitting to historical HW QMs from recent years and older records, mostly replicating R13.0 upper end due to no new high-stage QMs. Latest GZF on record used for first offset, second offset is conceptually what it would take to change control types guaranteed. Section to section-channel exchange occurs between upper 2 ft stages (07/29/25 section control pic) and between 3-4ft stages (06/10/25 & 04/16/24 SV's section-channel control pics). By 5 ft it's apparent channel control conditions prevail.\\n\\nRating pt 1: set low end before reaching GZF, aligned with R13.0 until those stages can be measured.\\nRating pt 2: representative of section control breakaway\\nRating pt 3: representative of section-channel control breakaway\\nRating pt 4: set high end of maxed out stg-q relationship, matched R13.0 until those stages can be measured and verified." # //RATING EXPANSION="logarithmic" # //RATING BREAKPOINT1=3.636838E+00 # //RATING OFFSET1=6.500000E-01 OFFSET2=1.200000E+00 # //RATING_INDEP ROUNDING="????" PARAMETER="Gage height (ft)" # //RATING_DEP ROUNDING="????" PARAMETER="Discharge (ft^3/s)" # //RATING_DATETIME BEGIN=20251201000000 BZONE=-07:00 END=-------------- EZONE=--- AGING=Working # //RATING_DATETIME COMMENT="Implemented R14.0 during period of ice affect. Created by EJR, checked by JBG." INDEP DEP STOR 16N 16N 1S 1.1174432E+00 4.3424204E+00 * 3.6368382E+00 6.3000000E+02 * 4.7576767E+00 1.8245116E+03 * 9.3300000E+00 7.5800000E+03 *