Louisiana Revised Statutes Tit. 49, § 1143. Adopt-a-waterbody program

A. In order to fulfill the obligations and responsibilities under this Chapter, the secretary may promote and encourage a program to be known as “adopt-a-waterbody”, whereby a business or a private civic organization may adopt a portion of a public bayou, stream, creek, river, or lake for the sole purpose of controlling litter. Included in the responsibilities of any business or private civic organization which chooses to participate in the program may be the following:

B. Any organization which adopts a portion of a public bayou, stream, creek, river, or lake may place a sign identifying the organization on an interstate highway or state highway within two hundred feet of the adopted waterbody upon approval of the Department of Transportation and Development. Such a sign may also be placed on the bank of the adopted water body with the approval of the riparian landowner.