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    • Helix : Transportation system plan 

      Helix (Or.); David Evans and Associates; Umatilla County (Or.) (City of Helix (Or.), 2001-06)
      The Helix Transportation System Plan (TSP) guides the management of existing transportation facilities and the design and implementation of future facilities for the next 20 years. This Transportation System Plan constitutes ...
    • Helix Notice of Adopted Amendment (2010-08-27) 

      Helix (Helix, 2010-08-27)
      As required by Federal Emergency Management Agency, the city of Helix updated its floodplain ordinance and adopted new digital floodplain maps in order to maintain compliance with the National Flood Insurance Program.