BANGOR — Penobscot County commissioners voted 2-1 Tuesday over the objections of Commissioner Peter Baldacci to oppose Roxanne Quimby’s proposed national park.

With Baldacci saying that the commission should hear first from Quimby or her son Lucas St. Clair before making a decision, two commissioners opted to join the state Legislature, both U.S. senators and U.S. Rep. Mike Michaud in opposing the park.

Commission Chairman Tom Davis and Commissioner Stephen Stanley said they found it unnecessary to discuss the well-known issue further. Both described a national park as an unnecessary addition to Baxter State Park and doubted that it would contribute enough to the county economy to offset the incursion of federal authority it would bring.

St. Clair wrote in a letter dated Sunday to the commission that officials from Elliotsville Plantation Inc., the nonprofit foundation he describes as working to conserve land and preserve open spaces for public benefit, should meet with commissioners to hear their concerns before a decision is made.

“Elliotsville is in the process of evaluating the possibilities for the future of our property, with an emphasis on options that preserve access for the future use and enjoyment of all Mainers for hunting, fishing, snowmobiling and other outdoor recreation,” St. Clair, president of the foundation’s board of directors, said in the letter.

“We would respectfully ask the commission not to take any action or position tomorrow that offers an official county position on what Elliotsville should or should not be allowed to do with our private property without first having a dialogue with us as the property owner in question,” the letter states.

“We believe such a request is a reasonable one for any property owner to make whenever an outside group wants to bring the subject of a property owner’s lands before a governing body such as the commission,” the letter continues.

Millinocket Town Manager Eugene Conlogue, who argued for the commission’s eventual decision, said he was satisfied. Following Conlogue’s request, the commission agreed to form a committee with local officials that under federal law would act as voice equal to the National Park Service and any other federal agency that might come into the area to advocate for a federal park.

Millinocket leaders and members of the Maine Woods Coalition that Conlogue belongs to have opposed Quimby’s proposal to give about 70,000 acres she owns or will own to the National Park Service for a national park in 2016 and to create another 30,000-acre area for motorized recreational usage.

Park supporters have said that a study would be the best means of determining the suitability of Quimby’s land for a park. A park could provide a vast new revenue stream for the economically depressed region, they say, and a $40 million endowment Quimby plans to provide, including $20 million she hopes to raise with a national campaign, would cover park maintenance and operation costs.

Opponents challenge the credibility of a national park study and are skeptical of statements made by Quimby and federal officials that a park would not grow beyond 70,000 acres. They say federal authority would infringe on local government and threaten the state’s forest products industry.

Among the individuals and entities opposing the park plan and a park study are republican U.S. Sens. Olympia Snowe and Susan Collins; democratic U.S. Rep. Mike Michaud of East Millinocket; Gov. Paul LePage; the Maine Legislature; and the towns of Millinocket and East Millinocket.

More than a dozen community, business and environmental groups — including several snowmobile clubs, the Katahdin Area Chamber of Commerce and Millinocket’s downtown business association — have publicly supported a feasibility study. The Medway Board of Selectmen remains the only governmental body to do so.

One survey claimed that 60 percent of Mainers support a park feasibility study. Another poll done by a group opposing the park study claimed the opposite.