NEW YORK — Summit Infrastructure Group and SDC Capital Partners announced the close of their previously announced transaction through which SDC has acquired a majority interest in SummitIG, a provider of dark fiber connectivity for data center, carrier, government and enterprise customers.  Previous lead investor, Columbia Capital, has retained a material ownership stake in the Company.

SummitIG is a dark fiber infrastructure provider to carriers, data center operators, content providers and large enterprises in Northern and Central Virginia.  The Company's extensive network infrastructure includes over 500 route miles of unique, newly-constructed and 100 percent underground metro and long-haul routes that enable custom designed, fiber-based solutions for its expansive customer base.