Here’s a view from the plaza at the foot of the dam. Once again you see the dual nature of the spillway – natural on the left; man made to the right.
I’ve posted about the Croton Dam before. See:
However, although I spoken of the dam, I don’t recall saying anything about the bridge that goes over the spillway. I recently came across an interesting article on the Friends of the Old Croton Aqueduct site: New Spillway Bridge at Croton Dam To Evoke Historic Design.
Apparently this is not the original bridge, which was built in 1905. Damaged by roadway salt, and spray from the spillway that bridge had to be replaced in 1975. Structural problems required that this bridge too be replaced and work started on the replacement in 2003.
Although the 2003 bridge is similar to the original 1905 version it’s not identical. According to the article
There are differences between the 1905 bridge and the new design. Twelve columns, equally paced to echo the detailing along most of the dam’s face, will fill the spandrels – the two triangular space between the top deck of the bridge and the outer curves of its wide arch over the Croton River; the 1905 bridge had 18 of the vertical elements, with varied spacing between them. While the 1905 bridge was black and the 1975 pan was a weathered dark brown, the new bridge will be silver-gray in color to blend with the masonry of the dam. To eliminate painting and reduce maintenance costs, the final finish will be obtained through a process called metallizing. Less visible will be such improvements as a higher load capacity, stainless steel reinforcements, and seismic constraints.
Some great photos of the dam while it was under construction can be found at: New Croton Dam Construction, circa 1902