Hudson River-Black River Regulating District
It owns and operates several dams - including the Conklingville Dam which formed the Great Sacandaga Lake - and reservoirs . 
<triplet> Conklingville Dam <subj> dams <obj> instance of <subj> Great Sacandaga Lake <obj> reservoir created <triplet> Great Sacandaga Lake <subj> Conklingville Dam <obj> dam