Specifications include, but are not limited to: South Coast Rail Early Action Culverts-The work will take place in various locations over the length of the Middleborough Secondary, the New Bedford Main Line, and the Fall River Secondary. The work consists of the removal and replacement of forty-six existing culverts and the removal without replacement of one existing culvert that cross railroad rights of way; the cleaning of sixteen existing culverts that cross railroad rights of way; improvements to the existing storm drainage system at the Tarkiln Hill Road railroad grade crossing and improvements to the roadways in the railroad grade crossing area; the construction of six wetlands impact mitigation areas adjacent to railroad rights of way.