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  Council » Policies and Plans » Rules and regulation » Waikato Regional Plan » Waikato Regional Plan (online version) » 4.2 River and Lake Bed Structures » 4.2.15 Erosion Control Structures

4.2.15 Erosion Control Structures

4.2.15.1 Permitted Activity Rule – Erosion Control Structures

Unless controlled by Rule 4.2.5.1 the use, erection, reconstruction, placement, alteration or extension of a:

  1. revetment or erosion control structure, and
  2. associated bed disturbance, and
  3. necessary deposition of construction material, and
  4. any discharge of sediment associated with construction activities

in, on or over the bed of a lake or river, for the purposes of erosion control are permitted activities subject to the following conditions:

  1. The structure and the floodway in the immediate vicinity of the structure shall be maintained clear of debris.
  2. The structure shall not decrease the cross sectional area of the river.
  3. For any stretch of river or lake bank measuring up to one bank kilometre in length, the combined length or erosion control structures shall not exceed 50 metres in length.
  4. The structure shall not be constructed of, or contain, vehicle bodies or demolition rubble other than clean concrete, placed such that there is no visible steel in the finished work.
  5. The construction works shall comply with the suspended solids discharge standards as set out in Section 4.2.21.
  6. All construction materials and equipment shall be removed from the river or lake bed and the floodplain on the completion of that activity.
  7. No contaminants (including, but not limited to, oil, hydraulic fluids, petrol, diesel, other fuels, paint or solvents, but excluding sediment) shall be discharged to water from the activity.
  8. Where the weight of the structure is insufficient to keep it in place it shall be anchored to the bed and bank of the river.
  9. The structure shall be maintained in a structurally sound condition at all times.
  10. The owner of the structure shall inform the Waikato Regional Council in writing of the location of the structure at least 10 works days prior to work commencing.
  11. The structure shall not be located in a water body identified as a Natural State water body in the Water Management Class Maps.
  12. The activity shall not disturb any archaeological site or waahi tapu as identified at the date of notification of this Plan, in any district plan, in the NZ Archaeological Association’s Site Recording Scheme, or by the Historic Places Trust except where Historic Places Trust approval has been obtained.
  13. In the event of any waahi tapu that is not subject to condition l) being identified by the Waikato Regional Council to the person undertaking the use, erection, reconstruction, placement, extension or alteration, the activity shall cease insofar as it may affect the waahi tapu. The activity shall not be recommenced without the approval of the Waikato Regional Council.
  14. Any erosion occurring as a result of the structure shall be remedied as soon as practicable.
  15. This rule shall not apply to activities located in, on, under or over the bed of a river or lake that is a Significant Geothermal Feature.
  16. The structure shall provide for the safe passage of fish both upstream and downstream.
  17. The structure shall be constructed against the eroding stream or lake bank and be physically attached to it.

Advisory Note:

  • Where a waahi tapu site is identified whilst undertaking the activity, the process that Waikato Regional Council will follow in order to implement condition m) is set out in Section 2.3.4.22 of this Plan.
  • Where a structure or activity is to be located in, on, under or over the bed of a water body that is Significant Geothermal Feature, Rules 7.6.6.1 to 7.6.6.3 shall apply. Significant Geothermal Features are defined in the Glossary, and in Development and Limited Development Geothermal Systems, identified on maps in Section 7.10 of this Plan.

 

4.2.15.2 Controlled Activity Rule – Erosion Control Structures

Unless controlled by Rule 4.2.5.1 and Rule 4.2.15.1 the use, erection, reconstruction, placement, alteration or extension of a:

  1. revetment or erosion control structure not exceeding 200 metres combined length per kilometre, and
  2. associated bed disturbance, and
  3. necessary deposition of construction material, and
  4. any discharge of sediment associated with construction activities

in, on or over the bed of a lake or river, for the purposes of erosion control are controlled activities (requiring resource consents) subject to the following standards and terms:

  1. The structure and the floodway in the immediate vicinity of the structure shall be maintained clear of obstructions.
  2. The structure shall not be constructed of, or contain, vehicle bodies or demolition rubble other than clean concrete placed such that there is no visible steel in the finished work.
  3. All construction materials and equipment shall be removed from the river or lake bed and the floodplain on the completion of that activity.
  4. No contaminants (including, but not limited to, oil, hydraulic fluids, petrol, diesel, other fuels, paint or solvents, but excluding sediment) shall be discharged to water from the activity.
  5. Where the weight of the structure is insufficient to keep it in place it shall be anchored to the bed and bank of the river.
  6. The structure shall be maintained in a structurally sound condition at all times.
  7. The structure shall not be located in a water body identified as a Natural State water body in the Water Management Class Maps of this Plan.
  8. The activity shall not disturb any archaeological site or waahi tapu as identified at the date of notification of this Plan, in any district plan, in the NZ Archaeological Association’s Site Recording Scheme, or by the Historic Places Trust except where Historic Places Trust approval has been obtained.
  9. Any erosion occurring as a result of the structure shall be remedied as soon as practicable.
  10. This rule shall not apply to activities located in, on, under or over the bed of a river or lake that is a Significant Geothermal Feature.

Waikato Regional Council reserves control over the following matters:

  1. The degree to which the structure is able to restrict the cross sectional area of the river.
  2. The design, location and size of the erosion control structure.
  3. The materials used for construction of the structure.
  4. The potential effects on bed and bank stability and water quality.
  5. The potential to alter the shape or alignment of the river or lake bed.
  6. Measures to control the effect of the activity on upstream or downstream properties.
  7. Measures to control the effects of the activity on any lawfully established structures.
  8. Effects on any waahi tapu or other taonga from the activity.
  9. Effects on the relationship of tangata whenua and their culture and traditions with the site and any waahi tapu or other taonga affected by the activity.
  10. Effects on the ability of tangata whenua to exercise their kaitiaki role in respect of any waahi tapu or other taonga affected by the activity.
  11. Measures to control suspended sediment discharges.
  12. Measures to avoid, remedy or mitigate adverse effects on the natural character of the beds of rivers and lakes.
  13. Measures to control the effect of the activity on areas of significant indigenous vegetation and significant habitats of indigenous fauna.
  14. Measures to prevent damage to riparian vegetation or soil.
  15. Measures to ensure the safe passage of fish both upstream and downstream.
  16. Measures to control the adverse effects on recreational uses and access.

Advisory Notes:

  • The use, erection, reconstruction, placement, alteration or extension of a revetment or erosion control structure in or on the bed of a river or lake that does not comply with Rule 4.2.15.1 or 4.2.15.2 is a discretionary activity in accordance with Rule 4.2.4.4.
  • Information requirements to enable the assessment of any application under Rule 4.2.15.2 are set out in Section 8.1.3.1. In addition, assessment shall also take into account the matters identified in Policy 2 of Section 4.2.3.
  • The imposition of consent conditions under matters viii), ix) and x) shall take into account the policy direction provided in Policies 1 and 2 in Section 2.3.3 in addition to specific policies in this chapter of the Plan.
  • Where a structure or activity is to be located in, on, under or over the bed of a water body that is Significant Geothermal Feature, Rules 7.6.6.1 to 7.6.6.3 shall apply. Significant Geothermal Features are defined in the Glossary, and in Development and Limited Development Geothermal Systems, identified on maps in Section 7.10 of this Plan.

Explanation and Principal Reasons for Adopting Methods 4.2.15.1 and 4.2.15.2
The use, erection, reconstruction, placement, alteration or extension of erosion control structures that are less than 50 metres combined length per kilometre are unlikely to have any significant adverse effects. These structures provide positive effects by stabilising river beds and banks, preventing sediment inputs, and assist in improving aquatic habitats.

Erosion control structures between 50 and 200 metres combined length per kilometre as provided for in Rule 4.2.15.2 have a greater potential to cause significant adverse effects. This Rule allows structures of this size to be constructed while maintaining control over any potential adverse effects that may occur.

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