Ind. Code § 8-16-1-10
(c) The authority shall let the contracts for the construction of such bridge or bridges under this chapter in the same manner and under the same conditions as are fixed by law for the letting of contracts for the construction of highways by the department.
Formerly: Acts 1939, c.79, s.7b; Acts 1941, c.217, s.5. As amended by Acts 1980, P.L.74, SEC.267; P.L.109-1983, SEC.38; P.L.18-1990, SEC.146.