• Crossings are not constructed within an Erosion Hazard Zone as identified by the Regional Land Plan crossings are not installed on a channel which is part of a Catchment Control Scheme.
• Crossings do not alter the natural course of the stream or divert flood water.
• Crossings are not located within 1 km of an urban area culverts and bridges must be designed to accommodate a ten year flood event
• Construction should avoid any adverse effects on fish spawning and migration by:
  • constructing outside the spawning/migration season
  • using techniques to avoid material entering the water
  • structure and works should not impede fish passage

Other points to consider are:

• sediment must be minimised allowing no conspicuous changes in water clarity during/after construction
• approaches, abutments, inlets and outlets should be stabilised and protected against erosion
• all materials used that are not part of the final construction must be removed
• crossings must be maintained to avoid accumulation of flood debris

For more information please read:

• Bridges
• Culverts
• Fords