The agency has charged Singh with criminal conspiracy, cheating, forgery and corruption.
The work for laying underground cables from Sector 14 A to Mahamaya flyover and Film City flyover to Cambridge School in Noida was awarded to JSP Constructions in 2011.
The CBI during its probe found that it was decided in advance as to who will get the contract.
Estimates were inflated, the bill of quantities was changed and there was a cartel formation among contractors to make JSP Constructions the lowest bidder, it said.