Where a drainage district is situated in more than one (1) county, it is the duty of the trustee of any county in which such district lies to make monthly settlement with the county mayor of the county in which the district was organized, as provided by § 69-5-915; provided, that all cash collections shall be paid to the trustee of the county in which the district was organized to be placed to the credit of the drainage district as now provided by law.
T.C.A. § 69-5-916