Report - USGS · 2011-04-08 · usaf3 19 54 1.5 t 0103 meters 650 600 550 500 mcl7 1984 to 320 feet 2200 2150 2100 2050 2000 1950 1900 1850 1800 1750 1700 165c 1600 meters 650 600 550 500

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