added historical attributes to Marseilles Hydro Plant Historic District
adjusted riverbank to 2023 imagery
adjusted riverbank to 2023 imagery
added footpaths, blocks and parking lots
adjusted riverbank to 2023 imagery
adjusted riverbank to 2023 imagery, added piers
adjusted riverbank to 2023 imagery
added non-historical attributes to Dresden Island Lock & Dam Historic District
added historical attributes to Dresden Island Lock & Dam Historic District
added Dresden Island Lock & Dam Historic District
added Dresden Island Lock & Dam construction site
added features to lock complex
added Dresden Island Dam and added piers
Adjusted Dam, added reefs and wetlands