The Lower Heart River Water Resource District is responsible for operating and maintaining the Lower Heart River Levee System that protects the City of Mandan and surrounding area from Heart River flooding.

The Lower Heart River Water Resource District covers 12,220 total acres.

• 5,540 Acres in Mandan (45%)

• 3,070 Acres in ETA (25%)

• 3,590 Acres in Morton County (30%)

• Operates under North Dakota Century Code 61-16.1

• Funded by appropriations (annual 4-mil maximum) from Morton County