The Association of Vermont Credit Unions has signed an agreement with Co-op Financial Services to promote Co-op's surcharge-free ATM network to its members, the two organizations announced Tuesday. "We've had a growing interest to expand our Vermont and New Hampshire-based ATM network for some time," Bryan Kent, association vice president, said in a statement. "Co-op allows us to expand ATM access both within and outside our state." The association represents Vermont and New Hampshire credit unions, which have a combined 270,000 members. Rancho Cucamonga, Calif.-based Co-op owns Co-op Network, which operates 25,000 surcharge-free ATMs, including 9,000 machines that accept deposits. Co-op recently announced that 111 credit unions had joined the network since January.