85-7-1943. Exceptions for certain projects. The provisions of 85-7-1941 and 85-7-1942 shall not apply to:
(1) any contract for the completion of works in course of construction by private owners, from whom said works may be acquired under the provisions of 85-7-1904 or 85-7-1905;
(2) any contract between the district and the United States.