Illinois Waterway, Dresden Island Lock and Dam , 7521 North Lock Road,...
Significance: The Dresden Island Lock and Dam site is significant as a component of the Illinois Waterway, which was developed to provide a navigable route from Lake Michigan to the Mississippi River and beyond... More
Illinois Waterway, La Grange Lock and Dam, 3/4 mile south of Country 7...
Significance: La Grange Lock and Dam is significant as a component of the Illinois Waterway, which was developed to provide a navigable route from Lake Michigan to the Mississippi River and beyond. La Grange D... More
Illinois Waterway, Dresden Island Lock and Dam , 7521 North Lock Road,...
Significance: The Dresden Island Lock and Dam site is significant as a component of the Illinois Waterway, which was developed to provide a navigable route from Lake Michigan to the Mississippi River and beyond... More
Illinois Waterway, Dresden Island Lock and Dam , 7521 North Lock Road,...
Significance: The Dresden Island Lock and Dam site is significant as a component of the Illinois Waterway, which was developed to provide a navigable route from Lake Michigan to the Mississippi River and beyond... More
Illinois Waterway, La Grange Lock and Dam, 3/4 mile south of Country 7...
Significance: La Grange Lock and Dam is significant as a component of the Illinois Waterway, which was developed to provide a navigable route from Lake Michigan to the Mississippi River and beyond. La Grange D... More
Illinois Waterway, Dresden Island Lock and Dam , 7521 North Lock Road,...
Significance: The Dresden Island Lock and Dam site is significant as a component of the Illinois Waterway, which was developed to provide a navigable route from Lake Michigan to the Mississippi River and beyond... More
Illinois Waterway, La Grange Lock and Dam, 3/4 mile south of Country 7...
Significance: La Grange Lock and Dam is significant as a component of the Illinois Waterway, which was developed to provide a navigable route from Lake Michigan to the Mississippi River and beyond. La Grange D... More
Illinois Waterway, La Grange Lock and Dam, 3/4 mile south of Country 7...
Significance: La Grange Lock and Dam is significant as a component of the Illinois Waterway, which was developed to provide a navigable route from Lake Michigan to the Mississippi River and beyond. La Grange D... More
Illinois Waterway, La Grange Lock and Dam, 3/4 mile south of Country 7...
Significance: La Grange Lock and Dam is significant as a component of the Illinois Waterway, which was developed to provide a navigable route from Lake Michigan to the Mississippi River and beyond. La Grange D... More
Liberty Bridge, Spanning Monongahela River, East Carson Street & Secon...
Significance: This was the longest and most expensive bridge built in Allegheny County when it was completed in 1928. The bridge links Pittsburgh's downtown area with the Liberty Tunnels, built through Mt. Wash... More
Illinois Waterway, Dresden Island Lock and Dam , 7521 North Lock Road,...
Significance: The Dresden Island Lock and Dam site is significant as a component of the Illinois Waterway, which was developed to provide a navigable route from Lake Michigan to the Mississippi River and beyond... More
Illinois Waterway, La Grange Lock and Dam, 3/4 mile south of Country 7...
Significance: La Grange Lock and Dam is significant as a component of the Illinois Waterway, which was developed to provide a navigable route from Lake Michigan to the Mississippi River and beyond. La Grange D... More
Liberty Bridge, Spanning Monongahela River, East Carson Street & Secon...
Significance: This was the longest and most expensive bridge built in Allegheny County when it was completed in 1928. The bridge links Pittsburgh's downtown area with the Liberty Tunnels, built through Mt. Wash... More
Liberty Bridge, Spanning Monongahela River, East Carson Street & Secon...
Significance: This was the longest and most expensive bridge built in Allegheny County when it was completed in 1928. The bridge links Pittsburgh's downtown area with the Liberty Tunnels, built through Mt. Wash... More
Illinois Waterway, La Grange Lock and Dam, 3/4 mile south of Country 7...
Significance: La Grange Lock and Dam is significant as a component of the Illinois Waterway, which was developed to provide a navigable route from Lake Michigan to the Mississippi River and beyond. La Grange D... More
Illinois Waterway, La Grange Lock and Dam, 3/4 mile south of Country 7...
Significance: La Grange Lock and Dam is significant as a component of the Illinois Waterway, which was developed to provide a navigable route from Lake Michigan to the Mississippi River and beyond. La Grange D... More
Liberty Bridge, Spanning Monongahela River, East Carson Street & Secon...
Significance: This was the longest and most expensive bridge built in Allegheny County when it was completed in 1928. The bridge links Pittsburgh's downtown area with the Liberty Tunnels, built through Mt. Wash... More
Illinois Waterway, La Grange Lock and Dam, 3/4 mile south of Country 7...
Significance: La Grange Lock and Dam is significant as a component of the Illinois Waterway, which was developed to provide a navigable route from Lake Michigan to the Mississippi River and beyond. La Grange D... More
Illinois Waterway, Dresden Island Lock and Dam , 7521 North Lock Road,...
Significance: The Dresden Island Lock and Dam site is significant as a component of the Illinois Waterway, which was developed to provide a navigable route from Lake Michigan to the Mississippi River and beyond... More
Illinois Waterway, Dresden Island Lock and Dam , 7521 North Lock Road,...
Significance: The Dresden Island Lock and Dam site is significant as a component of the Illinois Waterway, which was developed to provide a navigable route from Lake Michigan to the Mississippi River and beyond... More
Illinois Waterway, La Grange Lock and Dam, 3/4 mile south of Country 7...
Significance: La Grange Lock and Dam is significant as a component of the Illinois Waterway, which was developed to provide a navigable route from Lake Michigan to the Mississippi River and beyond. La Grange D... More
Liberty Bridge, Spanning Monongahela River, East Carson Street & Secon...
Significance: This was the longest and most expensive bridge built in Allegheny County when it was completed in 1928. The bridge links Pittsburgh's downtown area with the Liberty Tunnels, built through Mt. Wash... More
Liberty Bridge, Spanning Monongahela River, East Carson Street & Secon...
Significance: This was the longest and most expensive bridge built in Allegheny County when it was completed in 1928. The bridge links Pittsburgh's downtown area with the Liberty Tunnels, built through Mt. Wash... More
Illinois Waterway, Dresden Island Lock and Dam , 7521 North Lock Road,...
Significance: The Dresden Island Lock and Dam site is significant as a component of the Illinois Waterway, which was developed to provide a navigable route from Lake Michigan to the Mississippi River and beyond... More
Illinois Waterway, La Grange Lock and Dam, 3/4 mile south of Country 7...
Significance: La Grange Lock and Dam is significant as a component of the Illinois Waterway, which was developed to provide a navigable route from Lake Michigan to the Mississippi River and beyond. La Grange D... More
Illinois Waterway, La Grange Lock and Dam, 3/4 mile south of Country 7...
Significance: La Grange Lock and Dam is significant as a component of the Illinois Waterway, which was developed to provide a navigable route from Lake Michigan to the Mississippi River and beyond. La Grange D... More
Illinois Waterway, La Grange Lock and Dam, 3/4 mile south of Country 7...
Significance: La Grange Lock and Dam is significant as a component of the Illinois Waterway, which was developed to provide a navigable route from Lake Michigan to the Mississippi River and beyond. La Grange D... More
Illinois Waterway, La Grange Lock and Dam, 3/4 mile south of Country 7...
Significance: La Grange Lock and Dam is significant as a component of the Illinois Waterway, which was developed to provide a navigable route from Lake Michigan to the Mississippi River and beyond. La Grange D... More
Liberty Bridge, Spanning Monongahela River, East Carson Street & Secon...
Significance: This was the longest and most expensive bridge built in Allegheny County when it was completed in 1928. The bridge links Pittsburgh's downtown area with the Liberty Tunnels, built through Mt. Wash... More
Illinois Waterway, Dresden Island Lock and Dam , 7521 North Lock Road,...
Significance: The Dresden Island Lock and Dam site is significant as a component of the Illinois Waterway, which was developed to provide a navigable route from Lake Michigan to the Mississippi River and beyond... More
Illinois Waterway, La Grange Lock and Dam, 3/4 mile south of Country 7...
Significance: La Grange Lock and Dam is significant as a component of the Illinois Waterway, which was developed to provide a navigable route from Lake Michigan to the Mississippi River and beyond. La Grange D... More
Illinois Waterway, La Grange Lock and Dam, 3/4 mile south of Country 7...
Significance: La Grange Lock and Dam is significant as a component of the Illinois Waterway, which was developed to provide a navigable route from Lake Michigan to the Mississippi River and beyond. La Grange D... More
Illinois Waterway, La Grange Lock and Dam, 3/4 mile south of Country 7...
Significance: La Grange Lock and Dam is significant as a component of the Illinois Waterway, which was developed to provide a navigable route from Lake Michigan to the Mississippi River and beyond. La Grange D... More
Illinois Waterway, La Grange Lock and Dam, 3/4 mile south of Country 7...
Significance: La Grange Lock and Dam is significant as a component of the Illinois Waterway, which was developed to provide a navigable route from Lake Michigan to the Mississippi River and beyond. La Grange D... More
Illinois Waterway, La Grange Lock and Dam, 3/4 mile south of Country 7...
Significance: La Grange Lock and Dam is significant as a component of the Illinois Waterway, which was developed to provide a navigable route from Lake Michigan to the Mississippi River and beyond. La Grange D... More
Illinois Waterway, La Grange Lock and Dam, 3/4 mile south of Country 7...
Significance: La Grange Lock and Dam is significant as a component of the Illinois Waterway, which was developed to provide a navigable route from Lake Michigan to the Mississippi River and beyond. La Grange D... More
Illinois Waterway, Dresden Island Lock and Dam , 7521 North Lock Road,...
Significance: The Dresden Island Lock and Dam site is significant as a component of the Illinois Waterway, which was developed to provide a navigable route from Lake Michigan to the Mississippi River and beyond... More
Illinois Waterway, Dresden Island Lock and Dam , 7521 North Lock Road,...
Significance: The Dresden Island Lock and Dam site is significant as a component of the Illinois Waterway, which was developed to provide a navigable route from Lake Michigan to the Mississippi River and beyond... More
Illinois Waterway, La Grange Lock and Dam, 3/4 mile south of Country 7...
Significance: La Grange Lock and Dam is significant as a component of the Illinois Waterway, which was developed to provide a navigable route from Lake Michigan to the Mississippi River and beyond. La Grange D... More
Illinois Waterway, La Grange Lock and Dam, 3/4 mile south of Country 7...
Significance: La Grange Lock and Dam is significant as a component of the Illinois Waterway, which was developed to provide a navigable route from Lake Michigan to the Mississippi River and beyond. La Grange D... More
Illinois Waterway, La Grange Lock and Dam, 3/4 mile south of Country 7...
Significance: La Grange Lock and Dam is significant as a component of the Illinois Waterway, which was developed to provide a navigable route from Lake Michigan to the Mississippi River and beyond. La Grange D... More
Liberty Bridge, Spanning Monongahela River, East Carson Street & Secon...
Significance: This was the longest and most expensive bridge built in Allegheny County when it was completed in 1928. The bridge links Pittsburgh's downtown area with the Liberty Tunnels, built through Mt. Wash... More
Liberty Bridge, Spanning Monongahela River, East Carson Street & Secon...
Significance: This was the longest and most expensive bridge built in Allegheny County when it was completed in 1928. The bridge links Pittsburgh's downtown area with the Liberty Tunnels, built through Mt. Wash... More
Liberty Bridge, Spanning Monongahela River, East Carson Street & Secon...
Significance: This was the longest and most expensive bridge built in Allegheny County when it was completed in 1928. The bridge links Pittsburgh's downtown area with the Liberty Tunnels, built through Mt. Wash... More
Illinois Waterway, Dresden Island Lock and Dam , 7521 North Lock Road,...
Significance: The Dresden Island Lock and Dam site is significant as a component of the Illinois Waterway, which was developed to provide a navigable route from Lake Michigan to the Mississippi River and beyond... More
Illinois Waterway, La Grange Lock and Dam, 3/4 mile south of Country 7...
Significance: La Grange Lock and Dam is significant as a component of the Illinois Waterway, which was developed to provide a navigable route from Lake Michigan to the Mississippi River and beyond. La Grange D... More
Illinois Waterway, La Grange Lock and Dam, 3/4 mile south of Country 7...
Significance: La Grange Lock and Dam is significant as a component of the Illinois Waterway, which was developed to provide a navigable route from Lake Michigan to the Mississippi River and beyond. La Grange D... More
Illinois Waterway, La Grange Lock and Dam, 3/4 mile south of Country 7...
Significance: La Grange Lock and Dam is significant as a component of the Illinois Waterway, which was developed to provide a navigable route from Lake Michigan to the Mississippi River and beyond. La Grange D... More
Liberty Bridge, Spanning Monongahela River, East Carson Street & Secon...
Significance: This was the longest and most expensive bridge built in Allegheny County when it was completed in 1928. The bridge links Pittsburgh's downtown area with the Liberty Tunnels, built through Mt. Wash... More
Illinois Waterway, Dresden Island Lock and Dam , 7521 North Lock Road,...
Significance: The Dresden Island Lock and Dam site is significant as a component of the Illinois Waterway, which was developed to provide a navigable route from Lake Michigan to the Mississippi River and beyond... More
Illinois Waterway, Dresden Island Lock and Dam , 7521 North Lock Road,...
Significance: The Dresden Island Lock and Dam site is significant as a component of the Illinois Waterway, which was developed to provide a navigable route from Lake Michigan to the Mississippi River and beyond... More
Illinois Waterway, Dresden Island Lock and Dam , 7521 North Lock Road,...
Significance: The Dresden Island Lock and Dam site is significant as a component of the Illinois Waterway, which was developed to provide a navigable route from Lake Michigan to the Mississippi River and beyond... More
Illinois Waterway, Dresden Island Lock and Dam , 7521 North Lock Road,...
Significance: The Dresden Island Lock and Dam site is significant as a component of the Illinois Waterway, which was developed to provide a navigable route from Lake Michigan to the Mississippi River and beyond... More
Illinois Waterway, La Grange Lock and Dam, 3/4 mile south of Country 7...
Significance: La Grange Lock and Dam is significant as a component of the Illinois Waterway, which was developed to provide a navigable route from Lake Michigan to the Mississippi River and beyond. La Grange D... More
Illinois Waterway, La Grange Lock and Dam, 3/4 mile south of Country 7...
Significance: La Grange Lock and Dam is significant as a component of the Illinois Waterway, which was developed to provide a navigable route from Lake Michigan to the Mississippi River and beyond. La Grange D... More
Illinois Waterway, La Grange Lock and Dam, 3/4 mile south of Country 7...
Significance: La Grange Lock and Dam is significant as a component of the Illinois Waterway, which was developed to provide a navigable route from Lake Michigan to the Mississippi River and beyond. La Grange D... More
Liberty Bridge, Spanning Monongahela River, East Carson Street & Secon...
Significance: This was the longest and most expensive bridge built in Allegheny County when it was completed in 1928. The bridge links Pittsburgh's downtown area with the Liberty Tunnels, built through Mt. Wash... More
Illinois Waterway, Dresden Island Lock and Dam , 7521 North Lock Road,...
Significance: The Dresden Island Lock and Dam site is significant as a component of the Illinois Waterway, which was developed to provide a navigable route from Lake Michigan to the Mississippi River and beyond... More
Illinois Waterway, Dresden Island Lock and Dam , 7521 North Lock Road,...
Significance: The Dresden Island Lock and Dam site is significant as a component of the Illinois Waterway, which was developed to provide a navigable route from Lake Michigan to the Mississippi River and beyond... More
Illinois Waterway, La Grange Lock and Dam, 3/4 mile south of Country 7...
Significance: La Grange Lock and Dam is significant as a component of the Illinois Waterway, which was developed to provide a navigable route from Lake Michigan to the Mississippi River and beyond. La Grange D... More
Illinois Waterway, Dresden Island Lock and Dam , 7521 North Lock Road,...
Significance: The Dresden Island Lock and Dam site is significant as a component of the Illinois Waterway, which was developed to provide a navigable route from Lake Michigan to the Mississippi River and beyond... More
Illinois Waterway, Dresden Island Lock and Dam , 7521 North Lock Road,...
Significance: The Dresden Island Lock and Dam site is significant as a component of the Illinois Waterway, which was developed to provide a navigable route from Lake Michigan to the Mississippi River and beyond... More