If upon any such inspection or examination as is provided for in this article it is found that any highway contractors’ association of which any individual, partnership, or corporation holding a contract for the construction, maintenance, or repair of any public highway or bridge or for supplying any labor, materials, or supplies for any such construction, repair, or maintenance is a member has made use of methods or engaged in activities tending to prevent competition in the bidding on such contract or to increase the cost of such contract to the Commonwealth or county or has brought to bear or endeavored to bring to bear political influence to secure for such member such contract, then the Board may, at its option, cancel and annul such contract, paying thereon for the work done or labor, material, and supplies furnished only the reasonable value of the work done or labor, material, and supplies furnished.