If construction of projects has been completed by the soil and water conservation district, subdistricts of soil and water conservation districts, political subdivisions of the state, or other local agencies, or the federal government, or a department or agency of the federal government, on private lands under the easement granted to the county, only the cost of maintenance may be assumed by the county.
Iowa Code § 161E.5
86 Acts, ch 1238, §61; 87 Acts, ch 23, §48; 89 Acts, ch 83, §63