Rock Island Arsenal, Illinois Highways, Secondary Highways, etc

Latitude: 41.5218 (41°31′19″N), Longitude: -90.5445 (90°32′40″W)

Latitude: 41.5192 (41°31′9″N), Longitude: -90.5314 (90°31′53″W)

Latitude: 41.5196 (41°31′11″N), Longitude: -90.5495 (90°32′58″W)

Latitude: 41.5132 (41°30′48″N), Longitude: -90.5257 (90°31′33″W)

Latitude: 41.5137 (41°30′49″N), Longitude: -90.5197 (90°31′11″W)

Latitude: 41.5134 (41°30′48″N), Longitude: -90.5198 (90°31′11″W)

Latitude: 41.5162 (41°30′58″N), Longitude: -90.5631 (90°33′47″W)

Latitude: 41.515 (41°30′54″N), Longitude: -90.5413 (90°32′29″W)

Latitude: 41.5162 (41°30′58″N), Longitude: -90.5185 (90°31′7″W)

Latitude: 41.5166 (41°30′0″N), Longitude: -90.5435 (90°32′37″W)

Latitude: 41.5161 (41°30′58″N), Longitude: -90.5574 (90°33′27″W)

Latitude: 41.5129 (41°30′46″N), Longitude: -90.5504 (90°33′1″W)

Latitude: 41.5225 (41°31′21″N), Longitude: -90.5447 (90°32′41″W)