The police juries and other parish governing authorities shall have the following powers:
Provided, however, nothing herein provided shall extend or restrict, or have any effect upon any powers of expropriation by a municipality.
Upon the acquisition of title to rights of way, the police juries shall thereupon execute to the United States and deliver to their authorized agent, a deed of donation of the rights of way, reciting the proceedings relative to the acquisition of the title. The deed of donation shall convey to the United States a good and absolute title to the rights of way against all persons whatsoever.
To donate to the United States any real property, which it may own or in which it may have any interest, for the purpose of the erection and construction thereon of public buildings which the United States may propose and agree to erect and construct. The police juries may warrant the title to the property, which may be so donated to the United States.
La. R.S. § 33:1236