Section 131-C. Location and construction of bridges

The board may authorize
  the location, change of location and construction of any bridge, applied
  for  by  any  town  or  towns,  jointly,  or  by  other than a municipal
  corporation, created under a general  law,  or  by  any  corporation  or
  individual  for  private purposes; and if a public bridge, erected other
  than by a  municipal  corporation,  establish  the  rates  of  toll  for
  crossing such bridge; but if such bridge is to cross a navigable stream,
  provision  shall be made in the resolution or permission authorizing the
  same, for the erection and maintenance of a suitable  draw,  to  prevent
  any  obstruction  of  the  navigation  of  such stream; and if a private
  bridge, provision shall be made that the draw shall be kept open as  may
  be  required to permit all vessels to pass without loss of headway. When
  such bridge shall be intersected by the line of counties, the action  of
  the  board  of supervisors of each county shall be necessary to give the
  jurisdiction herein permitted.   If such bridge is  to  cross  a  stream
  which  is  navigable in fact, it, including its abutments, and piers, if
  any, shall be located and constructed in accordance with maps, plans and
  specifications to be approved by the department of  transportation;  and
  not otherwise, and copies of such maps, plans and specifications showing
  the  location,  character, design and dimensions of such bridge, and the
  fact of such approval shall be filed in the office of the department  of
  transportation.