Neb. Rev. Stat. § 17-710: Neb. Rev. Stat. § 17-710

All money received on special assessments shall be held by the city treasurer of a city of the second class or village treasurer as a special fund to be applied to the payment of the improvement for which the assessment was made, and such money shall be used for no other purpose whatever, unless to reimburse such municipality for money expended for such improvement.