Comparison of Environmental Geology maps, from the Environmental Geologic Atlas of the Texas Coastal Zone, with aerial photographs taken in February 1975 revealed changes related to economic development of the region and to ongoing natural processes. The areal extent of these changes, however, amounts to only 0.9 percent of the 11,820 square miles (30,610 km^2) covered by the 1975 photographs. Nearly half of the 1,105 changes detected involved channel dredging, spoil disposal, reworking of existing spoil, and creation of made land. The greatest number of natural changes involving a single environmental geologic unit resulted from dune migration in Kenedy County. The changes detected do not detract from the Environmental Geologic Atlas of the Texas Coastal Zone as a thorough, detailed, but open-ended compilation of resource information.