Hidden Staten Island: See what's inside those Silver Lake Reservoir gatehouses Updated Sep 17, 2019; Twitter Share STATEN ISLAND, N.Y. - If you visit Silver Lake Park to jog, walk your dog, fish, or to just enjoy the great outdoors, you've likely walked across the reservoir bridge too many times to count. And you've passed those cool gatehouses on either side of the bridge. I know I have. Ever wondered what's inside those structures, which date from the beginning of the last century? Have a look. Tom Wrobleski | wrobleski@siadvance.com Some history first: Once known as Fresh Pond, the lake was drained in 1913 and turned into a working reservoir by the Board of Water Supply, according to Advance records. The board was created by the state legislature in 1905 to build the Catskill water supply system.