The board of supervisors or county commissioners shall cause the special assessment made upon the lands benefited as provided in section 23-316 to be entered upon the tax lists of the county as provided in cases of special assessments, which assessment shall constitute a lien on the real estate respectively assessed and shall be collected as other special assessments are collected. One-tenth of each assessment shall be collected each year for a period of ten years with interest at the rate of seven percent per annum on deferred payments, unless paid in full as herein provided.