http://waterdata.usgs.gov/mo/nwis/annual/?referred_module=sw&amp;site_no=07067500&amp;por_07067500_2=834907,00060,2,1922,2011&amp;start_dt=1981&amp;end_dt=2009&amp;year_type=C&amp;format=html_table&amp;date_format=YYYY-MM-DD&amp;rdb_compression=file&amp;submitted_form=parameter_selection_list USGS Surface Water data for US – Big Spring 1981-2009] From Big Spring the river continues southeasterly leaving the Ozark National Scenic Riverways 105 miles from the headwaters.