Welsh 2001 Welsh2001.mdb geodatabase boundary welsh83_polygon: lake boundary elev 320 ft (created from 1995 Cason, TX DOQs and Digital Raster Graphics (DRG's) (digital version of 7.5 minute quadrangle maps) DOQs photographed on march 9, 1995 while water surface elev was 320.17 and on January 6, 1996 while water surface was 317.20. DRG used to compensate for low water surface elevation in January photo.) is83_polygon: islands isolated from above file (83 means projected in NAD83 State Plane) cont_2: 2 ft contours wel_pts: 2001 survey data points Welsh83_poly.shp: Lake boundary (see explanation above) Welsh_is83_poly.shp: island boundary Welsh_pts.shp: 2001 survey data points Welsh_cont_2.shp: 2 ft contours new_vol.txt: list of elevation area and volumes area.table.txt: elevation area table formatted volume.table.txt: elevation volume table formatted