USGS Water-Year Summary 2019
08149900 South Llano River at Flat Rock Lane at Junction, TX
LOCATION - Lat 30°28'44.45", long 99°46'40.94" referenced to North American Datum of 1983, Kimble County, TX, Hydrologic Unit 12090204, approximately 4.88 mi upstream from USGS station 08150000.
DRAINAGE AREA - 879 mi². Drainage area = 880 square miles found on South Llano River Bridge Layout FM 2169 plans dated 2010/01/13. This bridge is where the gage is located.
PERIOD OF RECORD - May 2012 to current year.
GAGE - Water-stage recorder. Datum of gage is 1,680 ft above NAVD88. Satellite telemeter at station.
COOPERATION - Texas State Soil and Water Conservation Board (TSSWCB)
EXTREMES OUTSIDE PERIOD OF RECORD - None known.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 66,700 ft³/s (Gage-height, 27.27 ft., from floodmark), Oct. 08, 2018, by slope area measurement. Minimum discharge, 14.6 ft³/s, gage-height 2.12 ft., Oct. 07, 2018.