Minn. Stat. § 103D.730: STORMWATER FACILITIES.

(a) Any watershed district may build, construct, reconstruct, repair, enlarge, improve, or in any other manner obtain stormwater systems, including mains, holding areas and ponds, and other appurtenances and related facilities for the collection and disposal of stormwater, maintain and operate the facilities, and acquire by gift, purchase, lease, condemnation, or otherwise any and all land and easements required for that purpose.

(b) The authority granted is in addition to all other powers with reference to the facilities otherwise granted by the laws of this state or by this chapter.