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Application for Resource Consent and Assessment of Effects on the Environment

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Application for Resource Consent and Assessment of Effects on the Environment Kaiapoi River Dredging Consent Application: Berthing at Floating Pontoons Application for Resource Consent and Assessment of Effects on the Environment Prepared by Waimakariri District Council under Section 88 of the Resource Management Act 1991 13 April 2018 Prepared by: Janet Fraser Utilities Planner (WDC) Reviewed by: Duncan Roxburgh Regeneration Project Manager PDU Project Number: PD000501 Author: Project Delivery Unit, Waimakariri District Council Published: February 2018 File / Record Number: DRA-07/ TRIM 1. Executive Summary 1.1 Application for Resource Consent To: Consents North Team Environment Canterbury PO Box 345 CHRISTCHURCH The Waimakariri District Council applies for resource consent as described below: 1. The name and address of the owner and occupier of the land to which the application relates is: Environment Canterbury, on behalf of the Crown, managed by Land Information New Zealand. 2. The location to which the application relates is: The Kaiapoi River bed at the Kaiapoi Wharf as defined in Appendix C, proposed for targeted dredging to enable placement in the river bed of floating pontoons, and enable vessel docking at pontoons 3. The types of resource consent sought are: • Water take permit for abstraction and non-consumptive return of water to the Kaiapoi River • Discharge of contaminants permit for Waimakariri River tributaries • Works in the beds of rivers • Discharge to air of dust or odour 4. A description of the activity to which the application relates is: • Excavation and piling within the bed of the Kaiapoi River • Non consumptive abstraction of water from Kaiapoi River (40-60 L/s) • Discharge water into the Kaiapoi River following dewatering of spoil • Storage of spoil on land adjoining the river, and transport of spoil to final disposal location • Future maintenance dredging around base of pontoons A detailed description of the proposal is included in the attached plans and Assessment of Environmental Effects (AEE) which forms part of this application. 5. The following separate resource consents will also be sought for the following: • Use of land for the stockpile and treatment of dredged material (from Waimakariri District Council) • Building consent for floating pontoons from Waimakariri District Council 6. Duration of the consent: • A 35 year term is sought for all consents 7. An assessment of any effects that the proposed activities may have on the environment in accordance with the fourth schedule to the Resource Management Act 1991 is attached. 8. Address for service of applicant: Waimakariri District Council Private Bag 1005 Consent Application Rangiora Wastewater Upgrade i Status: FINAL Rangiora 7440 Attention: Janet Fraser Telephone: 0800 965 468 ext. 8867 Email: [email protected] Consent Application Rangiora Wastewater Upgrade ii Status: FINAL Table of Contents 1. Executive Summary ........................................................................................................................................ i 1. Introduction .................................................................................................................................................. 5 1.1. Project Description ............................................................................................................................... 5 1.2 Executive Summary .............................................................................................................................. 5 1.3 Background ........................................................................................................................................... 6 2. Description of the Environment ................................................................................................................... 6 2.1. Location and Source ............................................................................................................................. 7 2.2 Formation of the Modified Kaiapoi River Channel ............................................................................... 8 2.3 Sediment Characteristics and Fingerprinting ....................................................................................... 9 2.4 Sediment Quality ................................................................................................................................ 10 2.5 Kaiapoi River Ecology .......................................................................................................................... 11 2.6 Surface Water Quality ........................................................................................................................ 14 2.7 Culture and Heritage Values ............................................................................................................... 19 2.8 Kaiapoi River Flow Regimes ................................................................................................................ 20 2.9 Groundwater Environment and Hydrogeological Setting .................................................................. 21 2.10 Existing Land Use ................................................................................................................................ 22 3 Description of the Activity .......................................................................................................................... 22 3.1 Proposed Pontoon Design Features and Constraints ......................................................................... 22 3.2 Proposed Dredging Excavation Spoil Quantities ................................................................................ 23 3.3 Historic Dredging of the Kaiapoi River ................................................................................................ 23 3.4 Proposed Dredging Method ............................................................................................................... 24 3.5 Timing of Dredging and Piling Activities ............................................................................................. 27 3.6 Contaminant Management ................................................................................................................ 28 3.7 Dewatering of Spoil ............................................................................................................................ 28 3.8 Cultural Input ..................................................................................................................................... 31 3.9 Ongoing Maintenance Dredging ......................................................................................................... 32 3.10 Proposed Sediment Management ...................................................................................................... 33 4 Reasons for Application .............................................................................................................................. 34 4.1 Resource Management Act 1991 ....................................................................................................... 34 4.2 Waimakariri River Regional Plan Requirements ................................................................................. 39 4.3 Canterbury Land and Water Regional Plan ........................................................................................ 45 4.4 Canterbury Air Regional Plan .............................................................................................................. 48 4.5 Overall status ...................................................................................................................................... 50 5 Description of Actual and Potential Environmental Effects ....................................................................... 51 5.1 Positive Effects .................................................................................................................................... 51 5.2 Effects on Water Quantity .................................................................................................................. 51 5.3 Effects on Surface Water Quality........................................................................................................ 53 Consent Application Rangiora Wastewater Upgrade iii Status: FINAL 5.4 Effects on Aquatic Ecology and Habitat .............................................................................................. 55 5.5 Effects on Groundwater Quality ......................................................................................................... 57 5.6 Effects on Lower Bank/ Stop bank Stability ........................................................................................ 58 5.6 Effects on Air Quality .......................................................................................................................... 59 5.7 Effects on Human Health .................................................................................................................... 59 5.8 Heritage Effects .................................................................................................................................. 60 5.9 Cultural and Tangata Whenua Effects ................................................................................................ 60 5.10 Consideration of Alternatives ............................................................................................................. 61 6.0 Recommendations for Mitigation .....................................................................................................
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