The Augusta Planning Board voted unanimously Tuesday night to approve the construction of a $76.8 million, 138-bed nursing home for veterans across Old Belgrade Road from MaineGeneral Medical Center. The multi-building facility will be built by Maine Veterans’ Homes, a nonprofit corporation, to replace the nursing facility that it operates on Cony Road in Augusta. “I think this is going to be a very good project, and I think it will be a very good investment for the people it serves,” Planning Board Chairman Justin Poirier said, shortly before the nine-member committee voted in favor of the project. Maine Veterans’ Homes plans to begin construction in spring 2018, and the project could take two years. In approving the application, the Planning Board included several additional conditions for Maine Veterans’ Homes to meet. The organization must have all the necessary permits from the Maine Department of Environmental Protection, and it must post a performance bond for costs that could be incurred by the city, said Alison Nichols, secretary of the Planning Board, before the vote. The project will require blasting of ledge, and the organization also will have to notify neighbors, including MaineGeneral, when that is happening, Nichols said. During a public hearing before the vote, several Maine Veterans’ Homes executives and an engineering consultant addressed the Planning Board and answered questions about its size and the services it will offer. According to the proposed building plans, residents would live in individual units clustered together in several residential-style buildings connected by walkways, rather than in a more traditional institutional-style building.