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Operation
East portals for Lines 1 and 3
<![CDATA[<br>Source: Wikipedia article <a href="https://en.wikipedia.org/wiki/East_River_Tunnels#cite_ref-cudahy_15-2">East River Tunnels</a>]]>
East portal for Line 2
<![CDATA[<br>Source: Wikipedia article <a href="https://en.wikipedia.org/wiki/East_River_Tunnels#cite_ref-cudahy_15-2">East River Tunnels</a>]]>
East portal for Line 4
<![CDATA[<br>Source: Wikipedia article <a href="https://en.wikipedia.org/wiki/East_River_Tunnels#cite_ref-cudahy_15-2">East River Tunnels</a>]]>
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