Z01646000 USGS H01646000 3858330771446005151059SW0207000857.8 150.94 N01646000 DIFFICULT RUN NEAR GREAT FALLS, VA Y01646000 301646000 19350906 810 7.03 301646000 19360613 2890 10.58 301646000 19370426 1760 8.88 301646000 19371028 2890 10.64 301646000 19390130 1040 7.36 301646000 19400420 1170 7.71 301646000 19410405 685 6.49 301646000 19420331 634 6.24 301646000 19421016 2820 10.50 301646000 19431109 1550 8.50 301646000 19450801 1450 8.26 301646000 19460518 1170 7.68 301646000 19470821 682 6.42 301646000 19480620 1300 8.05 301646000 19481204 1000 7.30 301646000 19500716 1760 8.90 301646000 19510614 1660 8.88 301646000 19520901 1940 9.17 301646000 19521121 1760 8.90 301646000 19531214 748 6.59 301646000 19550813 2960 10.70 301646000 19560721 3190 10.96 301646000 19570514 1220C 7.85 301646000 19571221 1820C 9.05 301646000 19590902 1080C 7.54 301646000 19600805 1550C 8.49 301646000 19610413 1120C 7.60 301646000 19620312 1170C 7.69 301646000 19630630 1350C 8.08 301646000 19640109 1120C 7.59 301646000 19650305 1220C 7.82 301646000 19660914 1710C 8.84 301646000 19670825 6610C 13.18 301646000 19680910 2030C 9.37 301646000 19690723 3360C 10.97 301646000 19700414 1440C 8.30 301646000 19710214 1850C 9.07 301646000 19720622 32200C 21.40 301646000 19730427 1740C 8.86 301646000 19731221 1120C 7.59 301646000 19750926 7770C 13.82 301646000 19760101 2160C 9.59 301646000 19761009 1080C 7.46 301646000 19780126 3480C 11.11 301646000 19790906 3960C 11.54 301646000 19791001 300018C 301646000 19810704 1200C 7.80 301646000 19820613 1500C 8.41 301646000 19830415 1920C 9.21 301646000 19840329 1770C 8.96 301646000 19850212 1990C 9.33 301646000 19860416 689C 6.42 301646000 19870908 1490C 8.41 301646000 19880519 4310C 11.75 301646000 19890506 6810C 13.31 301646000 19891116 1000C 7.31 301646000 19901023 3050C 10.89 301646000 19920422 1560C 8.55 301646000 19930304 1840C 9.09 301646000 19931128 4720C 12.04 301646000 19950120 1110C 7.58 301646000 19960119 3660C 11.25 301646000 19961019 2570C 10.15 301646000 19980321 3030C 10.51 301646000 19990916 1680C 8.42 301646000 20000417 1650C 8.37 301646000 20010811 4830C 12.03 301646000 20020428 1240C 7.54 301646000 20030923 4400C 11.71 301646000 20031211 5070C 12.20 301646000 20050328 3170C 10.66 301646000 20060626 10200C 15.01 301646000 20061116 4270C 11.61 301646000 20080906 14300C 16.62 301646000 20090526 2270C 9.43 301646000 20100818 2520C 9.94 301646000 20110908 17000C 17.54 301646000 20111013 2100C 9.15 301646000 20121030 2650C 9.99 301646000 20140430 5610C 12.57 301646000 20150709 2300C 9.38 301646000 20160503 1840C 8.53 301646000 20170729 2010C 8.86 301646000 20180722 6270C 12.99 301646000 20190708 8170C 12.95 301646000 20200413 2310C 8.71 301646000 20210901 3550C 9.71 301646000 20211025 24802C 8.69 301646000 20221223 2320C 8.51