Created 13-Nov-10
Modified 15-Sep-22
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**The Atlantic Avenue Tunnel is officially the world's oldest subway tunnel. This tunnel was built in 1844 beneath a busy street in the City of Brooklyn (Brooklyn did not become part of NYC until a half-century later). The Atlantic Avenue Tunnel is a half-mile long and accommodated two standard gauge railroad tracks.

The Atlantic Avenue Tunnel was built in only seven months, using the cut-and-cover method; only hand tools and primitive equipment was utilized in its construction. It was built to provide grade separation for early Long Island Rail Road trains that lacked brakes good enough to operate on city streets. The tunnel was built to attain grade separation for the previously existing LIRR route on the surface of Atlantic Avenue. The tunnel eliminated vehicular and pedestrian traffic conflicts and delays.

Bob Diamond rediscovered the long forgotten Atlantic Avenue Tunnel in 1980. The Brooklyn Historic Railway Association (BHRA) was formed in 1982 to preserve, publicize and provide public access to the historic tunnel. BHRA successfully filed and received historic designations. BHRA continues to maintain and conduct tours and events within the Atlantic Avenue Tunnel.

The tunnel is located within both the Brooklyn Heights and Cobble Hill Historic Districts, and within a U.S. Historic District. The Atlantic Avenue tunnel is a landmarked and protected historic site (It has been a Federal (and State of New York) officially registered Landmark since September 7, 1989: National Register of Historic Places, NRHP Reference#: 76001225).**

Categories & Keywords
Category:Architecture and Structures
Subcategory:Places of Interest
Subcategory Detail:
Keywords:atlantic, ave, tunnel

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