A Southington electrical contractor who worked with a Bristol construction company for “more than 30 years” voted to make that company the general contractor on a $67 million school building project in Bristol — and later received a $2.5 million contract from that same company to work at another project in Tolland, documents show. Stephan Masotti, of Masotti Electric, has been a member of the Memorial Boulevard Intradistrict Arts Magnet School Building Committee since November 2017. The committee voted to make D’Amato Construction the general contractor on the $67 million project in December 2018. Masotti had no comment about the Birch Grove Primary School job when contacted Tuesday. Masotti Electric was paid about $2.39 million by D’Amato as the electrical contractor for Birch Grove, according to sources familiar with the project. The committee voted unanimously to award the contract to D’Amato/Downes even though they only scored third out of the final four on the preliminary grading metrics the committee had established. The vote was unanimous with no abstentions, indicating that Masotti voted for the D’Amato/Downes team, minutes show.