Section 15-1941. Major repairs of drainage works

1. Major repairs, alterations, extensions and improvements of drainage
  works  for a drainage improvement district may be made by the department
  on petition  therefor  and  after  procedure  thereon  similar  to  that
  specified  in  section 15-1931 for original construction.  If additional
  surveys are required, they may be authorized  as  provided  in  sections
  15-1911,  15-1913,  15-1915 and 15-1917, except that the cost of surveys
  and other expenses may be included in the cost of  the  improvement  and
  assessed  on  the properties to be served thereby in accordance with the
  apportionment of cost of the repairs.
    2. Except where the department shall otherwise determine, the cost  of
  improvements  and  repairs to a ditch already built under the provisions
  of title 19 of this article, or of any former drainage  laws,  shall  be
  apportioned in the same manner as the original cost was apportioned, but
  the  department  may make a new apportionment by following the procedure
  above specified.