Career
He was the last person to sit in the Alberta Legislature under the Social Cr banner. Bow Valley-Empress was abolished and Mandeville ran for a second term in the new electoral district of Bow Valley in the 1971 general election. He faced a straight fight against Progressive Conservative candidate Don Murray.
Mandeville improved his margin of victory in the new electoral district to pick it up for Social Cr who became the official opposition after the Progressive Conservatives formed government.
His share of the vote dropped slightly but he held his seat comfortably even as almost all other Socred candidates went down to defeat. He defeated two other candidates to retain his seat.
By 1982 the Social Cr caucus had fallen apart with one member resigning his seat and two others leaving to sit as independents. Mandeville retired from the legislature at dissolution in 1982.
He was the last person to sit in the Alberta legislature under the Social Cr banner.
