630.546.  Lease purchase agreement authorized for use of facilities constructed by private developer on grounds of existing St. Louis state hospital, procedure — deemed to be public works, wage rate. — 1.  The commissioner of administration is authorized to enter into a lease-purchase agreement for the use of facilities to be constructed by a private developer on the grounds of the existing St. Louis state hospital for the use of the department of mental health, provided any facilities to be constructed shall contain provisions for a possible adaptive re-use of the present "dome" building.

  2.  The attorney general shall approve the instrument of conveyance as to form.

  3.  Not less than the rate of wages required to be paid pursuant to sections 290.210 to 290.340 shall be paid by contractors or subcontractors to employees or other workers when such contractors or subcontractors construct facilities for private developers on the grounds of the existing St. Louis state hospital for the use of the department of mental health.  Such construction projects shall be considered public works and the determination of the rate of wages for the locality shall be made in accordance with the provisions of sections 290.210 to 290.340.