1. All construction work which the Department of Environmental Conservation is authorized to undertake by virtue of the provisions of sections 15-1507 through 15-1519 shall be done under the direction of the Commissioner of Transportation. After the works shall have been constructed, they shall thereafter be maintained and operated for the benefit of the applicant by the Commissioner of Transportation under the direction of the Department of Environmental Conservation.

2. All costs of such supervision of construction, operation and maintenance shall be paid by the applicant in the manner specified in section 15-1513 of this article, except that the applicant shall not be charged with the salaries and expenses of such officials and regular employees of the state who, in addition to other duties, exercise only general supervision over the work done under the provisions of sections 15-1507 through 15-1519.

3. The Department of Environmental Conservation is authorized to employ such engineers and other persons as may in its judgment be necessary to carry out the provisions of sections 15-1507 through 15-1519 and to fix the compensation for such employees. Such compensation shall be paid by the applicant.

4. Except for such expenses and salaries as are specifically exempted by subdivision 2 of this section, no moneys of the state shall be expended, nor shall the state incur any liability or indebtedness by virtue of the provisions of sections 15-1507 through 15-1519.