Approved Transmission Line Site Env Mgmt Plan H by Mercury

Site Environmental Management Plan (SEMP) - Works Plan - Property H Turitea Transmission Line

This Plan is the property of Electrix Limited. This document is not to be reproduced to third parties without written authority from Electrix.

Job Manager: Customer: Electrix Job No: Version No. Date of Issue:

Kevin Small Mercury NZ Ltd (Mercury) P.0242015.1.01 V3.0 19th September 2019

Version: 3.0 DATE: 19/09/2019

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Distribution Register Name

Designation

Kevin Small

Project Manager

Emma ComrieThomson

Environmental Consultant (Electrix)

Role Peer Reviewer & Approver

Signature

Date

Reviewer

Approver

Peer Review

Amendment Register Issue No

Issue Date

Description

Author

8th July 2019

Version 1

Emma Comrie-Thomson

12th Sept 2019

Version 2

Emma Comrie-Thomson

19th Sept 2019

Version 3

Emma Comrie-Thomson

Version: 3.0 DATE: 19/09/2019

KS JB KS JB KS JB

KS KS KS

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ACRONYMS Acronyms

Defined

AEE

Assessment of Environmental Effects

CEMP

Construction Environmental Management Plan

CLG

Community Liaison Group

CNMP

Construction Noise Management Plan

CTMP

Construction Traffic Management Plan

DEB

Decanting Earth Bund

DOC

Department of Conservation

PNCC

Palmerston North City Council

SDS

Safety Data Sheets

SEMP

Site Environmental Management Plan

TDC

Tararua District Council

TLB

True Left Bank

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TABLE OF CONTENTS 1.

BACKGROUND

Introduction Turitea Water Catchment Area Site Walkover

6 7 8

SCOPE OF WORKS

WORK PROGRAMME

WINTER WORKS ‘RESTRICTION’ AREAS

ENVIRONMENTAL RISK

METHOD STATEMENT

Site Access Construction

EARTHWORKS

EROSION AND SEDIMENT CONTROL

Silt Fences Super Silt Fence Runoff Channels/Diversion Bunds Decommissioning and re-stabilising erosion and sediment control measures Monitoring 8.5.1 General Site Monitoring Rainfall Trigger Events Water Quality Monitoring

19 20 20 21 21 21 21 22

CULVERTS

Culvert replacements Diversion design

28 28

10.

TRUCK MOVEMENTS

11.

SPILL RESPONSE

Concrete and Grout

SITE CONTACT DETAILS

9.1.1

12.

List of Figures Version: 3.0 DATE: 19/09/2019

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Figure 1: Turitea Water Supply Catchment in relation to works area. ......................................................................... 8 Figure 2: Location plan. ................................................................................................................................................ 9 Figure 3: Overview of the works on Property H. ........................................................................................................ 10 Figure 4: Establishment works around P2-P3 and associated culvert upgrades. ....................................................... 11 Figure 5: Establishment works around P4. ................................................................................................................. 12 Figure 6: Establishment works around P5 and associated culvert upgrades. ............................................................ 13 Figure 7: Stockpile A location. .................................................................................................................................... 16 Figure 8: Stockpile B location. .................................................................................................................................... 17 Figure 9: Track Plans. .................................................................................................................................................. 18 Figure 10: Weather Monitoring Masts. ...................................................................................................................... 22 Figure 11: Erosion and Sediment Controls around P2-P3 and Stockpile A. ................................................................ 24 Figure 12: Erosion and Sediment Controls around P4 and P5. ................................................................................... 25 Figure 13: Erosion and Sediment Controls around Stockpile B. ................................................................................. 26

List of Tables Table 1: Consent conditions relating to SEMP .............................................................................................................. 6 Table 2: Attendees at site walkover. ............................................................................................................................ 8 Table 3: Indicative works programme. ....................................................................................................................... 14 Table 4: Track earthworks on Property H. .................................................................................................................. 17 Table 6: Culvert descriptions ...................................................................................................................................... 27 Table 7: Vehicle restrictions: Greens Rd and Kahuterawa Road. ............................................................................... 29 Table 8: Contact details for the contractor undertaking the work. ............................................................................ 30

Appendix Appendix A: Environmental Risk Register Appendix B: Culvert plans Appendix C: Permitted Activity Assessment

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1. Background Introduction This Site Environmental Management Plan (SEMP) details the principles, practices and procedures to be implemented to manage, remedy and mitigate potential adverse environmental effects during construction of a new 12km long 220kV transmission line to connect Transpower’s existing Linton Substation to the “Plantation Substation” at Mercury’s Turitea Wind Farm (the Project), near Palmerston North. This SEMP is for property H. The letter (e.g. “B”) assigned to each property is consistent with the property letters used in the wind farm resource consent application AEE. Figure 2 and 3 illustrates the property layout with figures 4-6 illustrating the exact works locations. The SEMPs will be updated as necessary during the Project to ensure that they remain current. Where relevant, significant updates will be re-submitted to the Approvers, for certification. Minor updates will be tracked in documentation but will not be resubmitted for approval. These are likely to include (but are not limited to): • • •

Minor design changes; Increase in environmental controls (e.g. Erosion and Sediment controls); and Changes as instructed by Regulatory authorities following audits.

Table 1: Consent conditions relating to SEMP

Condition

SEMP Section

The Consent Holder shall prepare and submit to the Environmental Compliance Manager, at each respective Council, a SEMP for each of the South Range Road, Water Catchment Access Road, Western Ridge, Browns Flat and Cross Valley Transmission and Out of Reserve (farmland) sub-catchment areas. The breakdown of the site into individual SEMPs may be varied by the Consent Holder as necessary to reflect any change to the design and construction programmes.

Each SEMP shall be prepared by a group of suitably qualified experts (including input from the Consent Holder, contractor, designer, environmental specialist, erosion and sediment control specialist and (for the walkover only) the consent authority). The preparation of the SEMP shall include, but not be limited to, an onsite meeting and walk-over of each sub-catchment area by this group of experts.

1.3

Each SEMP shall be submitted to the Environmental Compliance Managers for review, acting in a technical certification capacity, at least 30 working days prior to bulk earthworks commencing in each SEMP area. A response should be provided within 30 working days of receipt. Construction activities must not commence in the relevant SEMP area until written certification has been obtained. The purpose of the SEMP is to indicate how the CEMP will be applied on a site-specific basis.

Number

Each SEMP shall include the following as appropriate to each individual sub-catchment area: 11

11.1 A location plan; 11.2 A description of the work to be undertaken; Version: 3.0 DATE: 19/09/2019

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11.3 Contact details for the contractor(s) undertaking the work;

11.4 A work programme;

11.5 A method statement covering construction method, monitoring and contingencies;

Design for the works covered by the SEMP, showing:

11.6

a. Areas to be disturbed;

b. Vegetation clearance methods and vegetation stockpiling;

c. Fill areas;

d. Spoil stockpile and disposal areas;

e. Culverts and associated works in watercourses;

f. Step by step criteria for determining the appropriate use of erosion and sediment control measures, including cut off drains, surface water control works, sediment ponds, flocculation measures (if required), and progressive rehabilitation of earthworks areas;

g. Stormwater management measures; including both temporary and permanent measures;

8.3

h. Re-vegetation and rehabilitation (identification of re-vegetation to be undertaken and re-vegetation methods and any maintenance);

i. Inspection and reporting schedule in particular in response to adverse weather conditions;

8.6

j. Maintenance and monitoring activities;

8.5

k. Storage and handling of fuels and hazardous material and contingency measures for containment of spills; and

l. Decommissioning and re-stabilising of sediment ponds, and other erosion and sediment control measures, at the completion of construction.

8.4

Turitea Water Catchment Area The location of works, on property H, is not within the Turitea Water Supply Catchment, as illustrated in figure 1.

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Figure 1: Turitea Water Supply Catchment in relation to works area.

Site Walkover A site walkover was carried out on the 22nd July 2019 with the following specialists and construction team. Table 2: Attendees at site walkover.

Name

Role

Mason Jackson

Mercury - Consents and Compliance Manager

Gregor McLean

Southern Skies - Erosion and Sediment Consultant for Mercury

Hamish Sutherland

Horizons Monitoring Officer

Graeme Ridley

Ridley Dunphy - Erosion and Sediment Peer Review Consultant for Horizons

Kevin Small

Electrix - Project Manager

Emma Comrie-Thomson

Electrix - Environmental Manager

Jon Edwards

Electrix - Construction Manager

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Figure 2: Location plan. Version: 3.0 DATE: 19/09/2019

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Culvert 1

Culvert 2 Culvert 5

Culvert 4

Culvert 3 (upgrade no longer needed)

Culvert 7 Culvert 6

Culvert 8 - upgrade access road over pipe only

Culvert 13

Culvert 14

Culvert 12 Culvert 10 (upgrade not required) Culvert 11 Figure 3: Overview of the works on Property H. Version: 3.0 DATE: 19/09/2019

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Culvert 1

Culvert 2

Culvert 5 Culvert 3 (upgrade no longer needed) Culvert 4

Figure 4: Establishment works around P2-P3 and associated culvert upgrades. Version: 3.0 DATE: 19/09/2019

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Figure 5: Establishment works around P4. Version: 3.0 DATE: 19/09/2019

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Culvert 6

Culvert 7

Culvert 8 - upgrade access road over pipe only

Figure 6: Establishment works around P5 and associated culvert upgrades.

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2. Scope of works There are a number of steps involved in the construction of this transmission line, those relevant to environmental considerations are. •

• •

•

Construction of access tracks and work sites: This includes a site survey, the creation or upgrade of both permanent and temporary tracks, clearing and levelling of the site for the poles/towers and creation of cranes pads for lifting of pole/tower sections (where required); Geotechnical investigation: Carried out to better understand the geotechnical makeup of the ground which will be used to guide the design of the pole or tower foundations; Foundations: This will include the drilling or digging of foundation holes, the placement of steel reinforcing and connecting elements between foundation and pole or tower and pouring of concrete; Construction of the pole or tower sections: These will be craned together with some preassembly of tower sections occurring; Wiring: Running blocks will be hung on the towers and a pulling rope will be run out between the towers. The conductor will then be attached to the pulling rope and pulled through the towers. It is planned to do this in 3 sections. In each section there will be 8 wires pulled (two circuits each containing 3 individual conductor wires and 2 OPGW earth-wires); and Dressing: Running blocks will be removed, insulating stings hung to connect the conductor to the towers and vibration dampeners fitted.

3. Work Programme Overall the Project is anticipated to take approximately 1 year to construct. Many elements of the Project will be undertaken concurrently. This section of work is forecast be carried out as per Table 3. Table 3: Indicative works programme.

Activity onsite

Indicative Duration

Environmental controls and access Track to Poles 2-3

4 days

Environmental controls and access Track to Pole 4-5

6 days

Culvert replacements

2-4 days (each)

4. Winter Works ‘Restriction’ Areas Schedule 2 of the Consent decision, condition 3 outlines the restrictions for works being carried out in winter (defined as the months of 1 May to 30 September inclusively). The condition outlines that: “Road or platform pavement construction (including basecourse) works, and tower foundations may be undertaken at any time of the year.” The works outlined in section 2 above, on property H, meets with the above condition and therefore is not restricted.

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5. Environmental Risk A preliminary Environmental Risk Register is attached as Appendix A. The Risk Register is a live document which will be used by the Project team for Property H. As construction progresses the risk register will be reviewed and updated as required.

6. Method Statement Site Access Construction Access to work sites will be by ground-based methods with a route selected in agreement with the land owner. The route selected, as the access route to any work site, has considered impacts on; other land use activities, environmental impacts, safety of the route for the type of vehicles that will be required to use it and cost. All ground-based access routes have been marked on figures 4-6 which clearly indicate the proposed access route, referenced with: •

Structure Number

•

Property Name

•

Date designed

•

Date approved

•

Designer Name

•

Approver Name

A copy of the Access Route Plans shall be provided to the relevant land owner and filed in the project filing system. Details of all proposed access routes have been provided to 4Sight Consulting for assessment of compliance with resource consent conditions prior to commencing any construction work. Each ground-based access route will be marked on site with suitable pegs/pickets/markers prior to construction. Where the access routes are not along already formed tracks or roads, the markers shall be sufficiently frequent to enable the route to be easily assessed and followed. Access routes on sloping terrain where cuts and or fill will be required to form the carriageway shall be undertaken in accordance with the general guidance information provided by Linetech (or other civil engineer) to ensure cut slopes are stable and that fill areas/materials are suitably compactable and compacted to provide a durable roadway. New access routes will produce limited amounts of stockpile which will be utilised along the new access route. Areas where larger amounts of cut require the spoil to be transported away from the project, consultation between the landowner and Electrix will determine where the spoil will be placed (within the property boundary or disposed of appropriate off-site), in accordance with required authorities (e.g. PNCC, Horizons One Plan Permitted Activity requirements). Should temporary stockpiling be required on-site, these areas will be – •

At a distance of at least 20m from a waterbody; and Version: 3.0 DATE: 19/09/2019

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â&#x20AC;˘

Bunded on the uphill side to divert clean water runoff away from the stockpile.

Should any stockpile be required to remain onsite a perimeter silt fence will be installed, and stockpile will be hydroseeded, as per Schedule 2: Condition 23. Access routes on substantially flat land, or that do not require significant cut and fill shall be formed by either: 1. Stripping of topsoil along the route (and stockpiling of topsoil for later reinstatement), laying of an approved geotextile fabric along the route and installation of compactable material (e.g. GAP40), or 2. Laying of an approved geotextile fabric along the route and installation of compactable material (e.g. GAP40). The two areas marked for stockpiling on this property are marked in figure 7 and 8.

Figure 7: Stockpile A location.

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Figure 8: Stockpile B location.

7. Earthworks A series of aerials showing the specific locations of the works are illustrated in figure 4-6. •

Track lengths which comprise the temporary placement of metal on geofabric are shown as red (Track works plans are illustrated in figure 9);

•

Permanent new track lengths, or where metal will be placed and remain on existing tracks, are shown as white;

•

Culvert works are shown in pale blue; and

•

Transmission pylon locations are shown as “P”.

Table 4 outlines the volumes of earthworks / disturbance to occur for the track works. Table 4: Track earthworks on Property H.

Permanent Metal or Earthworks

(m3)

(m3) New tracks

Total Earthworks

Temporary Metal on Geofabric

(3.5m wide)

Existing tracks

Existing Tracks

(3.5m wide)

399

350

Crane Pad (10m x 15m)

120

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Machine Site (15m x 20m)

Earthworks Area (m2)

(m3) Laydown

Laydown

(40m x 20m)

(20m x 150m)

958

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Figure 9: Track Plans. Version: 3.0 DATE: 19/09/2019

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8. Erosion and Sediment Control Erosion and sediment control measures will be put in place to minimise potential adverse effects by utilising measures which meet (or exceed) industry best practice and guidelines such as Greater Wellington Regional Council’s ‘Erosion and Sediment Control Guidelines’. These are marked up in figures 11 and 12. This monitoring will include ensuring that: erosion and sediment control measure have been installed correctly and that methodologies are being followed and are functioning effectively throughout the duration of the works. Sediment control measures will be provided for potential silt run-off during construction and until the stabilisation of ground is established. The construction and environmental management and monitoring requirements include: • • • •

The management of sediment inputs to water courses from earthworks via stormwater and / or windblown dust; The design of stream crossings (predominantly culverts) to ensure they provide for fish passage; Best management practices to minimise the chance of accidental spillage or loss of hydrocarbons and non-stabilised cement products to watercourses; and Adoption of best practice sediment and erosion control measures.

Silt Fences Silt fences will only be used to intercept sheet flow on low gradient areas. They will always be installed along the contour. These are marked on figure 11 - 13, in green. No silt fences will be installed across waterbodies or in areas of concentrated flow. Installation • • • • • • • • •

A trench will be excavated (minimum 100mm wide and 200mm deep) along the line of the silt fence. Support posts will be installed on the downslope edge of the trench and silt fence fabric on the upslope side of the support posts to the full depth of the trench. Trench will be backfilled with compacted soil. Supporting posts or waratahs will be installed approximately 3m apart and 0.4m deep. Ensuring that the top height of the fence is 400mm above ground level. Fabric will be attached, doubled over and fasten to the support wire and posts with wire ties or cloth fastening clips at 150mm spacings. Lengths of silt fence will be joined together by doubling over fabric ends around the supporting posts (wooden posts/battens). The fabric ends will be stapled to the batten and butt two battens together. Silt fence wings will be installed at either end projecting upslope to a sufficient height to prevent outflanking.

Maintenance •

Silt fences will be inspected at least once a week and after each rainfall. Version: 3.0 DATE: 19/09/2019

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•

Repairs will be made when bulges occur or when sediment accumulation reaches half way up the fabric height. Sediment deposits will be removed as necessary to a secure area.

Super Silt Fence Due to the proximity to a stream (i.e. less than 20m) in the area of Pole 4, a super silt fence will be installed, illustrated in figure 12. A super silt fence provides more robust sediment control compared with a standard silt fence and allows up to four times the catchment area to be treated by an equivalent length of standard silt fence. Installation • • • • • • • • • •

Always install super silt fences along the contour Excavate a trench a minimum of 100 mm wide and 200 mm deep along the proposed line of the super silt fence Use supporting waratahs at least 1.8 m in length Ensure the 1.8 m long waratahs are driven to an appropriate depth (0.8 m minimum) Install tensioned galvanised wire (2.5 mm HT) at 400 mm and again at 800 mm above ground Tension the wire using permanent wire strainers attached to angled waratahs at the ends of the super silt fence Secure wire mesh fence to the waratahs with wire ties or staples, ensuring the wire mesh fence goes to the base of the trench Fasten the super silt fence material securely with ties spaced every 500 mm at the top and midsection of the super silt fence Place the super silt fence material into the base of the trench (a minimum of 200 mm into the ground) and place compacted backfill back to the original ground level When two sections of super silt fence material adjoin each other, ensure they are doubled over a minimum of 300 mm, wrapped around a waratah and fastened at 75 mm spacings to prevent sediment bypass

Maintenance • • • •

• • •

Inspect super silt fences at least once a week and after each rainfall Check for damage including rips, tears, bulges in the fabric, broken support wires, loose waratahs, overtopping, outflanking, undercutting, and leaking joins in the fabric Make any necessary repairs as soon as identified As the geotextile material becomes clogged with sediments, the duration of ponding increases. Therefore, careful cleaning of the super silt fence geotextile with a light broom or brush may be appropriate Remove sediment when bulges occur or when sediment accumulation reaches 20% of the fabric height Remove sediment deposits as necessary (prior to deposits reaching 20% of fabric height) to continue to allow for adequate sediment storage and reduce pressure on the super silt fence Dispose of sediment to a secure area to ensure it does not discharge to the receiving environment

Runoff Channels/Diversion Bunds A non-erodible channel or bund may be used on site to intercept clean water from non-worked areas and direct it around the work site (clean water diversion). Version: 3.0 DATE: 19/09/2019

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Decommissioning and re-stabilising erosion and sediment control measures The project will be staged so as to minimise the amount of exposed earth at any time. This will be achieved through staging of the works and progressive site stabilisation. Access roads will be stabilised as soon as their base course is down. Roads that have a slope of over 14 % will be stabilised with lime/cement followed by chip seal, with the remaining access roads stabilised with metal. Other parts of the site will be vegetated in a way that achieves a good level of vegetative cover (>80%) as quickly as possible to minimise erosion. Re-vegetation will be through hydroseeding and spreading of topsoil and grassing (mulching may be required in some areas). Hydroseeding will primarily be used on cut slopes and spoil sites. Where appropriate direct transfer of native vegetation from adjacent parts of the site will be used. Once the construction phase of the Project is complete, and the area is stabilised, the erosion and sediment control methods described above will be removed from site.

Monitoring Given the extent of the works (and the existing land-use) we believe there is low risk of discharge especially given the installation of the above controls. Where works are in more open terrain there may be an opportunity for upstream and downstream monitoring (control and impact) which can occur following rainfall/meteorological events.

8.5.1

General Site Monitoring

In addition to environmental monitoring, general site monitoring will be undertaken: •

•

Daily - Electrix Delivery team and/or the Health Safety and Environmental Team will conduct inspection and issues will be noted. These inspections are informal visual inspection in order to check compliance with the CEMP. Weekly - Formal site inspections are to be completed by the Health Safety and Environmental Team. Site specific checklists will be developed to check compliance against the SEMP (including resource consent conditions). Issues will be noted if they present significant environmental risks (e.g. works near watercourses). Monthly - The Electrix Project Management Team and the Construction Manager will undertake a monthly site with the Environmental Manager to confirm the environmental monitoring programmes and work procedures containing environmental controls are being implemented in accordance with the SEMP and resource consents.

Rainfall Trigger Events Rainfall forecasts and records for a site-specific and telemetered rainfall gauge will be monitored throughout the construction period. These triggers are referenced to a site-specific and telemetered rainfall gauge: • •

A rainfall event with an intensity equal to or greater than 15 mm/hr; and 25 mm or more total rainfall over any 24-hour period.

The rainfall triggers can be adjusted and refined through the course of construction phase as more data become available and as necessary to the minimise incidence of false alarm responses and/or missed events.

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Mercury has installed a project specific telemetered rainfall gauge at the northern end of the Wind Farm site (shown by Mast 11 in Figure 10). This data is sent to a website where programmable triggers can be set, and alerts can be sent to designated construction project staff. Electrix has subscribed to these notifications. Exceedances of the established rainfall triggers will lead to site inspections of erosion and sediment controls and water quality monitoring for turbidity at all event-based monitoring sites where works are in progress or the sites are un-stabilised in the respective catchments.

Figure 10: Weather Monitoring Masts.

Water Quality Monitoring Turbidity will be used as the key parameter for monitoring construction effects on waterways, and trigger levels for further construction effects monitoring and investigation will be based on turbidity. Turbidity will be measured at upstream and downstream of works using a calibrated hand-held meter in response to the established rainfall triggers. Field measurements will be gathered as soon as possible following the trigger rainfall event, when safe to do so and during working hours. Clarity monitoring (e.g. horizontal sight range of a black disk) will be undertaken to monitor construction related effects on water quality of the waterbody. Monitoring of water clarity will be undertaken upstream of the project site area and approximately 200 m 1 downstream (to allow for reasonable mixing), Horizonâ&#x20AC;&#x2122;s One-Plan defines the length for reasonable mixing as the lower value of 7 x median width of the river or 200 m downstream of the discharge. 1

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to assess the change in clarity due to the works. Visual clarity monitoring will be undertaken as soon as practicable during daylight hours following a trigger rainfall event. A photographic record will be maintained of these inspections. Water Quality Assessment A trigger of >30% change in visual clarity will be adopted to initiate adaptive management actions. If the reason for discolouration cannot be isolated to a specific area within the work site: â&#x20AC;˘ â&#x20AC;˘

Further discussions with the site team and/or additional site audits may be required to determine the contributing source (if any); and We will assess the appropriateness of existing erosion and sediment control measures within the catchment.

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Figure 11: Erosion and Sediment Controls around P2-P3 and Stockpile A.

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= Silt fence Page 24 of 28

Figure 12: Erosion and Sediment Controls around P4 and P5.

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= Silt fence Page 25 of 28

= Super Silt fence

Figure 13: Erosion and Sediment Controls around Stockpile B. Version: 3.0 DATE: 19/09/2019

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9. Culverts Eleven culverts will be installed, repaired or have works carried out around them. The locations of the culverts are marked on the aerials provided as figure 3-6, marked in blue. Proposed upgrade design documents are provided in Appendix B. The culverts are located within flat pasture land under existing farm tracks. The replacement culverts will all be a larger diameter than the existing culverts with the invert seated at the right level relative to the drainage. The culvert works will be carried out in accordance with the Permitted Activity Rules of Horizon’s One Plan; specifically rule 17.5 - Use, Maintenance, Upgrade, Removal and Demolition of Structures. The culverts to be installed are set out in the table 5: Table 5: Culvert descriptions

Culvert #

Property

Existing 225mm Ø concrete and tyres

New  

250mm Ø uPVC corrugated pipe

 

450mm Ø uPVC (SN8) or reinforced concrete (class 4) Install precast concrete wingwalls 600mm Ø uPVC (SN8) or reinforced concrete (class 4) Install precast concrete wingwalls

1150mm Ø uPVC pipe

No upgrade required

500mm Ø uPVC plastic

 

300mm Ø corrugated pipe

  

300mm Ø reinforced concrete pipe

  

225mm Ø reinforced concrete pipe

  

300mm Ø corrugated pipe

 

Widen access track down stream side Install precast concrete wingwalls 300mm Ø uPVC (SN8) or reinforced concrete (class 4) Widen access track to provide support to access road Install precast concrete wingwalls 450mm Ø uPVC (SN8) or reinforced concrete (class 4) Reconstruct access road Install precast concrete wingwalls 600mm Ø uPVC (SN8) or reinforced concrete (class 4) Reconstruct access road Install precast concrete wingwalls Strengthen access track over existing pipeline Steel plate to be used to centralize over existing culvert

300mm Ø uPVC culvert

No upgrade required

Unknow; possibly concrete slabs over small water channel

 

900mm Ø concrete culvert

 

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300mm Ø uPVC (SN8) or reinforced concrete (class 4) Install precast concrete wingwalls Strengthen access track over existing pipeline Steel plate to be used to centralize over existing culvert Page 27 of 28

225mm Ø reinforced concrete pipe

  

225mm Ø reinforced concrete pipe

 

300mm Ø uPVC (SN8) or reinforced concrete (class 4) Install precast concrete wingwalls Armour upstream side of culvert with rip rap 300mm Ø uPVC (SN8) or reinforced concrete (class 4) Install precast concrete wingwalls

Proposed upgrade design documents are provided in Appendix B with a Permitted Activity assessment as Appendix C.

Culvert replacements Works within waterbodies have a high potential for erosion and discharge of sediment. Before works on the culverts begins, timing of works will be planned so that the risk profile is reduced as much as possible by avoidance of high stream flows and where practicable avoidance of periods of fish spawning and migration. Construction will be completed as rapidly as possible and all areas then stabilised immediately during and following construction. To assist with diversion of water from around the works area, a dam and pump is a temporary practice which will be used to convey surface water from above a construction activity downstream of that activity.

9.1.1

Diversion design

The dam will be constructed across the stream (upstream and downstream) with stabilised materials such as sandbags, sheet metal plate or other suitable construction materials. A pump will be installed in the dam and sufficient hose length must be available to reach below the extent of in-stream works. The pump inlet will be placed in a drum with holes to minimise the possibility of sucking sediment from the bottom of the dam. Inclusion of a fish screen will also be adopted. The outlet will be directed to a stabilised area with an energy dissipater such as rip-rap boulders or similar. This dam and pump methodology will only be used for works with a short duration where the site can be stabilised at the end of each work day, so that flows can continue through the stream channel. Works will be carried out in general accordance with the DoC publication “Fish passage at Culvert”, December 1999.

10.Truck movements Works will be carried out in accordance with the Project Construction Traffic Management Plan (CTMP). Electrix will manage truck movements to minimise effects in ways that are in general accordance with the consent conditions. In brief summary: •

There will be no truck movements on Greens Road (until such time that it has been upgraded);

•

A ‘driver comments’ free phone number will be operated in accordance with Conditions 69 and 76 of Schedule 3; and

•

Records of vehicle movements will be kept in accordance with Conditions 73 and 74 of Schedule 3.

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In accordance with Schedule 3: condition 63 of the Resource Consent, vehicles entering or exiting the site will travel on Greens Road or Kahuterawa Road following their respective upgrades (required pursuant to Schedule 3, Condition 53 of the Consents) and at the following times: Table 6: Vehicle restrictions: Greens Rd and Kahuterawa Road.

Time Period

Light Vehicles

Trucks 6.30am to 7.30am; 8.15am to 3.15pm; and 4.30pm to 6.00pm.

Weekdays

No restrictions

Except that trucks shall not use the roads when particular events, notified through community consultation, are held, and which involve a peak in the presence of vulnerable road users, such as equestrian or cycling events. In addition, the prohibition on access from 7.30am to 8.15am and 3.15pm to 4.30pm only applies on school days.

6.30am to 7.30am; and Weekends and statutory holidays*

5.00pm to 6.00pm; Except that up to 10 other light vehicle movements may occur outside of these times each day.

No truck access, except that up to 6 truck movements per day may occur on weekends and statutory holidays between the hours of 8am and 6pm.

*Light vehicle access is also allowed at any time for the purposes of site security and site supervisors (associated with the monitoring of health and safety and environmental effects). Additionally, light vehicle and truck access is allowed at any time for the purpose of maintenance / emergency response, to carry out emergency maintenance works or to respond to a health and safety matter that cannot reasonable wait until a weekday.

11.Spill Response Best management practices will be adopted to minimise the chance of accidental spillage or loss of hydrocarbons and non-stabilised cement products to watercourses. A monitoring programme will provide the basis for an adaptive management response to issues that may arise during the construction phase of the Wind Farm. Emergency response and spill contingency plans will be implemented on site to minimise risks. The risk of accidental spillages of hydrocarbons and other potentially harmful substances during construction will be minimised by the adoption of best management practices such as refuelling in bunded sites out of sensitive sub-catchments and regular servicing / maintenance of hydraulic hoses on heavy machinery. All stored fuel will be protected by a bund for an appropriate volume to prevent spillage of fuel during normal use or by accidental rupture. A fuel bowser will then be used to transfer smaller quantities of fuel to plant employed around the Site. All Safety Data Sheet (SDS) will be available and understood by all personnel handling (or with access to) the substance. Version: 3.0 DATE: 19/09/2019

Page 29 of 28

All heavy plant will carry their own spill kits with storage containers and additional spill kits carried in each of the vehicles. Hazardous materials will be stored in a container which will be bunded. Storage containers will be at the laydown yard (with Property G).

Concrete and Grout Concrete will be transported onto this site via concrete truck (off-road vehicle). Grout maybe used to secure the ground anchors into the pads. Grout and concrete works will be managed by ensuring: •

Refilling areas are at least 20 m away from waterways;

•

Specific concrete and grout wash-down areas are provided;

•

The collect and disposing of excess concrete are removed from site; and

•

Spill kits are available and accessible for use.

12.Site Contact Details Table 7: Contact details for the contractor undertaking the work.

Position

Name

Organisation

Phone

Environmental Manager

Emma ComrieThomson

Electrix

Ph: 021 755 509

emmac@4sight.co.nz

Construction Manager

Jon Edwards

Electrix

Ph: 021 953 336

jon.edwards@electrix.co.nz

Project Manager

Kevin Small

Electrix

Ph: 021 312796

kevin.small@electrix.co.nz

HSEQ Assessor

Alison Gardiner

Electrix

Ph: 021 822 900

alison.gardiner@electrix.co.nz

Version: 3.0 DATE: 19/09/2019

Page 30 of 28

APPENDIX A: ENVIRONMENTAL RISK REGISTER

Environmental Risk Register Risk Rating Likelihood

Consequence

Probable

Minor

Possible

Improbable

Medium

Low

Minor: Low environmental impact. Short term and can typically be remedied.

Moderate

High

Medium

Low

Moderate: Environmental effect/s which can be remediated. Discharge off site occurs.

Major

High

Medium

CEMP = Construction Environmental Management Plan CLG = Community Liaison Group SEMP = Site Environmental Management Plan Electrix Environmental Manager = EEM Electrix Project Manager = EPM Electrix Project Ecologist = PE

Appendix A: Environmental Risk Register

Major: Significant environmental effect resulting in costly restoration under Resource Management Act.

Electrix Construction Manager = CM Construction Noise Management Plan = CNMP Assessment of Environmental Effects = AEE Electrix Environmental Management Team = EEMT Electrix Site Supervisor = SS

pg. 1

Issue Sediment tracking onto roads

Likelihood

Consequence

Risk

Mitigation

Possible

Minor

Low

All entrances and exits from site are to be stabilised entrance ways. These are to be maintained and may have wheel washes associated with them. Road sweeping if required. Erosion and sediment controls to be in place. Inspect controls regularly.

Public complaints

Possible

Moderate

Medium

Keep Community Liaison Group (CLG) informed of works and progress. Record complaint using the Complaints Form. Advise EEM.

Waste management

Possible

Moderate

Medium

All waste is to be collected and removed from site and disposed at an appropriately licensed facility. No domestic waste water will be discharged to ground or water within the water supply catchment.

Waterway contamination due to sediment discharge

Possible

Moderate

Medium

SEMP outlines site specific sediment controls. Methodologies within these documents need to be carefully followed. EEMT will be responsible for regular inspection and maintenance of all erosion and sediment controls and audits. Weather dependant checks will also be required from the EPM, CM and SS.

Waterway contamination due to concrete discharge - culverts

Possible

Moderate

Medium

Weather dependant checks will also be required from the EPM, CM and SS. Before works on the two culverts begins timing of works will be planned so that the risk profile is reduced as much as possible by avoidance of high stream flows. Culverts will be pre-fabricated off-site. To assist with diversion of water from around the works area, a temporary dam and pump will be used to convey surface water from above a construction activity downstream of the activity. No equipment washing is to occur near waterways.

Waterway contamination due to washing of vehicles and equipment

Improbable

Lack of environmental awareness

Possible

Moderate

Medium

Project environmental induction, SEMP induction and toolbox meetings.

Spill during refuelling of plant equipment to land or water

Possible

Moderate

Medium

Refuelling and servicing to occur in approved locations only.

Appendix A: Environmental Risk Register

Moderate

Low

No vehicle/equipment washing is to occur near waterways or stormwater cesspits. Designated areas will be utilised for washing vehicle/equipment.

Spill kits to be within easy reach and appropriately sized.

pg. 2

Issue Spill of hazardous substances to land or water

Likelihood

Consequence

Risk

Mitigation

Possible

Moderate

Medium

Spill kits to be within easy reach and appropriately sized. Appropriate training given to staff. Identify contaminant, stop source, protect receiving environment, contact EEM, clean up. Review and report using Environmental Incident Form. Store hazardous substances in bunded area or appropriately sized container. All storage containers to be labelled. Safety Data Sheet (SDS) to be stored with substances.

Sediment discharge during dewatering

Possible

Moderate

Medium

Install perimeter controls to divert clean water away from areas of disturbance. Controls to be inspected before use and maintained during use.

Contamination of surrounding area during insitu concreting and grouting

Possible

Major

Medium

Isolation of work area away from waterways. Collect and dispose of excess concrete. Spill kits to be within easy reach and appropriately sized. Appropriate training given to staff.

Construction noise

Possible

Major

Medium

Plan and carry out works in accordance with Construction Noise Management Plan (CNMP). Ensure any high-risk noise methodologies are communicated to CLG.

Dust

Possible

Major

Medium

Controls to be inspected before use and maintained during use. Wetting down of any area of concern. Surfaces and structures to be kept clean. Stabilisation of haul roads. All entrances and exits from site are to be stabilised entrance ways. These are to be maintained and may have wheel washes associated with them. Road sweeping if required.

Archaeological disturbance

Possible

Major

High

Avoidance of sensitive sites in design and acknowledgement of tangata whenua relationship with natural resources. Accidental Discovery Protocol to be followed and form part of the Project Environmental Induction.

Contamination due to works around waterways

Possible

Major

High

Slurry to be captured and disposed to pit, bin or off-site. Use of a wet-vac to capture contaminated slurry (e.g. concrete). Do not allow discharges to enter waterways or stormwater drains. Culvert replacement and works within waterways to follow specific methodologies within SEMPs. Ensure timing of these works is appropriately managed with weather monitoring etc.

Ecology - stream ecology

Appendix A: Environmental Risk Register

Possible

Major

High

Works to be carried out in accordance with the Adaptive Aquatic Ecology Management Response Plan, by Tonkin & Taylor Ltd.

pg. 3

APPENDIX B: CULVERT PLANS

RevNo:

Date:

Signature:

Checked:

To safely carry Class 1 traffic (0.85 HN) replace existing culvert with new culvert. Refer Sheet C2

Culvert Location: (World Geodetic System 84)

S 40° 24' 53.3" E 175° 37' 52.6" Height: 67m

Flow

Google Earth Location

Revision note:

Ø22 5r

einfo rced

conc r

ete p

ipe x 5

000

long

Concrete headwall

tra ck

Rubber tyres

View of accessway over culvert

Plan of Culvert Scale 1:50 (A3)

View of culvert outlet

approx 600mm cover

Access track

Concrete headwall

approx 900mm cover

Flow

Rubber tyres

Ø225 reinforced concrete pipe x 5000 long

Section Through Culvert

Elevation of Culvert

Scale 1:50 (A3)

View of culvert inlet

202 Broadway Ave | Box 1594 | Palmerston North phone: 06 357 5448 | mobile: 021 430 107 | email: steven@charlesconsulting.co.nz

Charles Consulting Ltd copyright: This drawing and its contents are owned by Charles Consulting Ltd. Any reproduction in part or full is forbidden unless prior permission is given in writing

Civil Drawings:

Culvert Number 1 - Existing

Foxtrot Culvert Access Track Inspections

A3 Original Drawing Status: Date: Designed by: SGC Filename / Job No: Foxtrot Culvert Inspections / 3035 Investigation & Report 03.09.19 Prepared by: JFC Revision: R0 Sheet: Scale: 1:50 (A3) C1 Approved by: SGC 1:25 (A1)

RevNo:

Revision note:

Date:

Signature:

Checked:

DESIGN CRITERIA Discharge for 5 year return period event to pass pipe Discharge for 20 year return period event Traffic Loading Structure Lifespan

< 5 ha 3

< 0.35 m /s < 0.35 m3/s, no over topping Class 1 - 0.85HN

}

NOTE: Design criteria to be verified during detailed design phase & before construction commences.

Install precast concrete wingwall

Not less than 50 years

Flow New

Ø45 0m

m uP

VC p

ipe (

SN8

) or

reinf

orce d

conc

rete

(Cla ss 4

Resource Consent Only

)x6 000

7670

- Ov

erall

leng th

min

long

Form new earth bank to suit each end of culvert

Install precast concrete wingwall

Upgrade existing culvert with new Ø450mm culvert

inclu

ding wing wall s

es cc

Plan of Culvert Scale 1:50 (A3)

7670 - Overall length including wingwalls Build up access track min width 4000 Install precast concrete wingwall 600 min cover

Form new earth bank to suit each Install precast end of culvert concrete wingwall

New Ø450mm uPVC pipe (SN8) or reinfor ced concrete (Class

4) x 6000 min long

NOTE: Culvert must be benched into stream at least 20% of culvert Ø

Catchment Size

Section Through Culvert

Charles Consulting Ltd copyright: This drawing and its contents are owned by Charles Consulting Ltd. Any reproduction in part or full is forbidden unless prior permission is given in writing

Civil Drawings:

Culvert Number 1 - Proposed Upgrade

Install precast concrete wingwall

Elevation of Culvert

Scale 1:50 (A3)

202 Broadway Ave | Box 1594 | Palmerston North phone: 06 357 5448 | mobile: 021 430 107 | email: steven@charlesconsulting.co.nz

New Ø450mm uPVC pipe (SN8) or reinforced concrete (Class 4) x 6000 min long

Scale 1:50 (A3)

Foxtrot Culvert Access Track Inspections

RevNo:

Date:

Signature:

Checked:

To safely carry Class 1 traffic (0.85 HN) replace existing culvert with new culvert. Refer Sheet C2

Culvert Location: (World Geodetic System 84) Unstable roadway edge for heavy vehicles

S 40° 25' 00.1" E 175° 37' 55.5" Height: 69m

Revision note:

ou r

Google Earth Location Rubber tyres ted pipe

g uPVC corruga

Ø250 x 7000 lon

Flo

Flow

Ø300 damaged Hardwood pole

Concrete strainers

Access track

View of accessway over culvert

Plan of Culvert

View of culvert outlet

Ø300 damaged Hardwood pole

approx 2000

Rubber tyres

Stock fence

Scale 1:100 (A3)

Flow Ø250 uPVC corrugated pipe

Section Through Culvert Scale 1:100 (A3)

View of culvert inlet

202 Broadway Ave | Box 1594 | Palmerston North phone: 06 357 5448 | mobile: 021 430 107 | email: steven@charlesconsulting.co.nz

Charles Consulting Ltd copyright: This drawing and its contents are owned by Charles Consulting Ltd. Any reproduction in part or full is forbidden unless prior permission is given in writing

Civil Drawings:

Culvert Number 2 - Existing

Foxtrot Culvert Access Track Inspections

RevNo:

Revision note:

Date:

Signature:

Checked:

DESIGN CRITERIA Catchment Size Discharge for 5 year return period event to pass pipe Discharge for 20 year return period event Traffic Loading Structure Lifespan

< 10 ha < 0.6m³/s < 0.75 m3/s, no over topping Class 1 - 0.85HN

}

NOTE: Design criteria to be verified during detailed design phase & before construction commences.

Upgrade existing culvert with longer new Ø600mm culvert

New Engineered fill to provide support to access road

Not less than 50 years New Engineered fill to provide support to access road

Install precast concrete wingwall

VC pipe (SN8) or New Ø600mm uP

e (Class 4) x 1200 reinforced concret

0 long Flo

Resource Consent Only

Flow

13670 - Overall

length including

wingwalls

Access track min width 4000

Plan of Culvert Scale 1:100 (A3)

Flow New Ø600mm uPVC pipe (SN8) or reinforced concrete (Class 4) x 12000 long

New Engineered fill to provide support to access road

Install precast concrete wingwall

NOTE: Culvert must be benched into stream at least 20% of culvert Ø

Install precast concrete wingwall

Build up access track min width 4000

2000

Stock fence

13670 -Overall length including wingwalls

New Ø600mm uPVC pipe (SN8)or reinforced concrete (Class 4) x 12000 long Install precast concrete wingwall

12000 long

Section Through Culvert

Elevation of Culvert Scale 1:100 (A3)

Scale 1:100 (A3)

202 Broadway Ave | Box 1594 | Palmerston North phone: 06 357 5448 | mobile: 021 430 107 | email: steven@charlesconsulting.co.nz

Charles Consulting Ltd copyright: This drawing and its contents are owned by Charles Consulting Ltd. Any reproduction in part or full is forbidden unless prior permission is given in writing

Civil Drawings:

Culvert Number 2 - Proposed Upgrade

Foxtrot Culvert Access Track Inspections

RevNo:

Revision note:

Date:

Signature:

Checked:

No upgrade required Culvert Location: (World Geodetic System 84)

approx 400 to 500 cover

S 40° 25' 04.01" E 175° 37' 54.3" Height: 83m

Google Earth Location Concrete headwall

Flow Ø11 Flow

50 p la

stic

pipe

/ cor ruga

ted x

6000

Rubber tyres

Ø1150 plastic / corrugated x 6000 long

long

Section Through Culvert Scale 1:50 (A3)

View of accessway over culvert

tra

Ø1150 plastic pipe / corrugated x 6000 long

Elevation view of culvert

Plan of Culvert

Elevation of Culvert

Scale 1:50 (A3)

View of culvert outlet

202 Broadway Ave | Box 1594 | Palmerston North phone: 06 357 5448 | mobile: 021 430 107 | email: steven@charlesconsulting.co.nz

Charles Consulting Ltd copyright: This drawing and its contents are owned by Charles Consulting Ltd. Any reproduction in part or full is forbidden unless prior permission is given in writing

Civil Drawings:

Culvert Number 3 - Existing

Foxtrot Culvert Access Track Inspections

RevNo:

Revision note:

Date:

Signature:

Checked:

Access track narrow with limited lateral support for heavy vehicles

Culvert Location:

Large tree

(World Geodetic System 84)

S 40° 25' 04.6" E 175° 37' 52.9" Height: 82m

Google Earth Location

Concrete wingwall

Access track

Ø500 uPVC pipe

To safely carry Class 1 traffic (0.85 HN) widen track downstream side. Refer Sheet C2

Flow

1500

View of accessway over culvert

Plan of Culvert Scale 1:50 (A3)

Flow

Concrete bagging

1000

Concrete bagging

approx 1000 cover

View of culvert inlet

Ø500 uPVC pipe

Section Through Culvert

Elevation of Culvert

Scale 1:50 (A3)

View of culvert outlet

202 Broadway Ave | Box 1594 | Palmerston North phone: 06 357 5448 | mobile: 021 430 107 | email: steven@charlesconsulting.co.nz

Charles Consulting Ltd copyright: This drawing and its contents are owned by Charles Consulting Ltd. Any reproduction in part or full is forbidden unless prior permission is given in writing

Civil Drawings:

Culvert Number 4 - Existing

Foxtrot Culvert Access Track Inspections

RevNo:

Revision note:

Date:

Signature:

Checked:

Widen access track down stream side & install new concrete wingwall at outlet side

7000 - Overall length including wingwall

Resource Consent Only

Access track

Install new precast concrete wingwall

Existing Ø500 uPVC pipe

Flow

New Engineered fill to provide support to access road

Plan of Culvert Scale 1:50 (A3)

New Engineered fill to provide support to access road

7000 - Overall length including wingwall

Flow

Existing Ø500 uPVC pipe

Precast concrete wingwall

Existing Ø500 uPVC pipe

Section Through Culvert

Elevation of Culvert

Scale 1:50 (A3)

202 Broadway Ave | Box 1594 | Palmerston North phone: 06 357 5448 | mobile: 021 430 107 | email: steven@charlesconsulting.co.nz

Install new precast concrete wingwall

1000

Concrete bagging

approx 1000 cover

New Engineered fill to provide support to access road

Charles Consulting Ltd copyright: This drawing and its contents are owned by Charles Consulting Ltd. Any reproduction in part or full is forbidden unless prior permission is given in writing

Civil Drawings:

Culvert Number 4 - Proposed

Foxtrot Culvert Access Track Inspections

RevNo:

Revision note:

Date:

Signature:

Checked:

Culvert Location: (World Geodetic System 84) Step downhill = 10%

Existing side water channel

Google Earth Location Existing slumping / unstable hillside in this area

S 40° 25' 02.8" E 175° 37' 50.5" Height: 87m

4000 wide access track

Ø300

corrug

ated p

Drop this side ipe

To safely carry Class 1 traffic (0.85 HN) replace existing culvert with new culvert. Refer Sheet C2

Lack of width for heavy vehicles in this area

tra

View of accessway over culvert

Plan of Culvert Scale 1:50 (A3)

approx 300mm cover

View of culvert inlet

Ø300 corruga ted

pipe

Section Through Culvert Scale 1:50 (A3)

View of culvert outlet

202 Broadway Ave | Box 1594 | Palmerston North phone: 06 357 5448 | mobile: 021 430 107 | email: steven@charlesconsulting.co.nz

Charles Consulting Ltd copyright: This drawing and its contents are owned by Charles Consulting Ltd. Any reproduction in part or full is forbidden unless prior permission is given in writing

Civil Drawings:

Culvert Number 5 - Existing

Foxtrot Culvert Access Track Inspections

RevNo:

Revision note:

Date:

Signature:

Checked:

DESIGN CRITERIA Discharge for 5 year return period event to pass pipe Discharge for 20 year return period event Traffic Loading Structure Lifespan

< 1 ha < 0.1m³/s < 0.1 m3/s, no over topping Class 1 - 0.85HN

}

NOTE: Design criteria to be verified during detailed design phase & before construction commences.

Not less than 50 years Step downhill = 10%

Catchment Size

Armour side water channel / entry with 100 to 200mm size rip rap rock

New

Ø30 0

uPV

Resource Consent Only

ipe

(SN

8) o

r rei

nfor

ced

Install precast concrete wingwall

New Engineered fill to provide support to access road

732

0-O

vera

ll len

gth

Upgrade existing culvert with new Ø300mm culvert

con cret e

(Cla

ss 4 )

x 60

00 l

ong

New Engineered fill to provide support to access road

inclu

ding

wing

wall

Install precast concrete wingwall

ack

tr ess

Plan of Culvert Scale 1:50 (A3)

7320 - Overall length including wingwalls

300 min cover

1m min widening on upstream side Access track min width 4000

Install precast concrete wingwall

New Ø300mm uP

VC pipe (SN8) or

reinforced concre te

(Class 4) x 6000 lon

Section Through Culvert Scale 1:50 (A3)

202 Broadway Ave | Box 1594 | Palmerston North phone: 06 357 5448 | mobile: 021 430 107 | email: steven@charlesconsulting.co.nz

Charles Consulting Ltd copyright: This drawing and its contents are owned by Charles Consulting Ltd. Any reproduction in part or full is forbidden unless prior permission is given in writing

Civil Drawings:

Culvert Number 5 - Proposed Upgrade

Foxtrot Culvert Access Track Inspections

RevNo:

Revision note:

Date:

Signature:

Checked:

Culvert Location: (World Geodetic System 84)

To safely carry Class 1 traffic (0.85 HN) replace existing culvert with new culvert & reconstruct road. Refer Sheet C2

S 40° 25' 12.7" E 175° 37' 58.2" Height: 85m

Google Earth Location

Ø300 reinforced concrete pipe

Flow of existing stream

Ste

hill =

10 %

View of accessway over culvert

View of culvert inlet

Plan of Culvert

4000 wide access track

Ø300 reinforced concrete pipe

Charles Consulting Ltd copyright: This drawing and its contents are owned by Charles Consulting Ltd. Any reproduction in part or full is forbidden unless prior permission is given in writing

approx 1400 cover Dam level

Ø300 reinforced concrete pipe

Section Through Culvert

Elevation of Culvert

Scale 1:100 A3)

Scale 1:50 (A3)

View inside of culvert

202 Broadway Ave | Box 1594 | Palmerston North phone: 06 357 5448 | mobile: 021 430 107 | email: steven@charlesconsulting.co.nz

1383

approx 1400 cover

Scale 1:100 A3)

Civil Drawings:

Culvert Number 6 - Existing

Foxtrot Culvert Access Track Inspections

RevNo:

Revision note:

Date:

Signature:

Checked:

DESIGN CRITERIA

Traffic Loading

Class 1 - 0.85HN

}

New Engineered fill to provide support to access road

Raise / reconstruct access road & upgrade existing culvert with new Ø450mm culvert

Culvert Location:

SCOPE OF WORK: 1. Remove existing top soil approx 400mm. 2. Remove existing culvert & install new longer culvert 3. Re-build road with Tensar TX160 Grid & Engineered fill to reduce existing vertical alignment.

Not less than 50 years

Resource Consent Only

Structure Lifespan

< 0.75 m3/s, no over topping

(World Geodetic System 84)

S 40° 25' 12.7" E 175° 37' 58.2" Height: 85m

ss Acce

NOTE: New culvert to be placed same height & same alignment as existing.

00 th 40 in wid ack m

Ø600mm uPVC pipe (SN8) or reinforced concrete (Class 4) approx 14400 long

Precast concrete wingwall

Flow

Install precast concrete wingwall

16070 - Overall length including wingwalls Install precast concrete wingwall

New Engineered fill to provide support to access road

16070 - Overall length including wingwalls

Plan of Culvert Ø600mm uPVC pipe or reinforced concrete (Class 4) x 14400 long NOTE: Culvert must be benched into stream at least 20% of culvert Ø

7000

Scale 1:100 A3)

Tensar TX160 Grid

Install precast concrete wingwall

Re-build road with Tensar TX160 Grid & Engineered fill to reduce existing vertical alignment.

4000 wide access track

Raise existing road to improve vertical alignment for heavy vehicles

Discharge for 20 year return period event

< 0.6m³/s

NOTE: Design criteria to be verified during detailed design phase & before construction commences.

2000

Discharge for 5 year return period event to pass pipe

< 10 ha

Rebuild road over approx 30m long length (not to scale)

Catchment Size

Install precast concrete wingwall

10500

Precast concrete wingwall Ø600mm uPVC pipe (SN8) or reinforced concrete (Class 4) approx 14400 long

Elevation of Culvert

Section Through Culvert

Scale 1:50 (A3)

202 Broadway Ave | Box 1594 | Palmerston North phone: 06 357 5448 | mobile: 021 430 107 | email: steven@charlesconsulting.co.nz

Charles Consulting Ltd copyright: This drawing and its contents are owned by Charles Consulting Ltd. Any reproduction in part or full is forbidden unless prior permission is given in writing

Scale 1:100 A3)

Civil Drawings:

Culvert Number 6 - Proposed Upgrade

Foxtrot Culvert Access Track Inspections

NOTE: New culvert to be placed same height & same alignment as existing. A3 Original Drawing Status: Date: Designed by: SGC Filename / Job No: Foxtrot Culvert Inspections / 3035 Investigation & Report 09.09.19 Prepared by: JFC Revision: R0 Sheet: Scale: 1:100, 1:50 (A3) C2 Approved by: SGC 1:50, 1:20 (A1)

RevNo:

Revision note:

Date:

Signature:

Checked:

Culvert Location: (World Geodetic System 84) Stock fence

S 40° 25' 13.5" E 175° 38' 01.6" Height: 78m

Google Earth Location

6000 wide access track

m trea

s ng

Flo

ti xis of e

S slu cour mp / ho le

Timber post

Ø225 re

inforced

concrete

pipe

View of accessway over culvert

slu m

ole

3000

ou Sc

Water channel

Plan of Culvert View of culvert (dam side)

Scale 1:100 A3)

Access track Ø225 reinforced concrete pipe

To safely carry Class 1 traffic (0.85 HN) replace existing culvert with new culvert & rebuild access road Refer Sheet C2

Section Through Culvert Scale 1:100 A3)

View of culvert pipe

202 Broadway Ave | Box 1594 | Palmerston North phone: 06 357 5448 | mobile: 021 430 107 | email: steven@charlesconsulting.co.nz

Charles Consulting Ltd copyright: This drawing and its contents are owned by Charles Consulting Ltd. Any reproduction in part or full is forbidden unless prior permission is given in writing

Civil Drawings:

Culvert Number 7 - Existing

Foxtrot Culvert Access Track Inspections

A3 Original Drawing Status: Date: Designed by: SGC Filename / Job No: Foxtrot Culvert Inspections / 3035 Investigation & Report 09.09.19 Prepared by: JFC Revision: R0 Sheet: Scale: 1:100 (A3) C1 Approved by: SGC 1:50 (A1)

RevNo:

Revision note:

Date:

Signature:

Checked:

DESIGN CRITERIA Catchment Size

< 12.5 ha

Discharge for 5 year return period event to pass pipe

< 0.6m³/s

}

NOTE: New culvert to be placed same height & same alignment as existing.

Not less than 50 years

Resource Consent Only

New Engineered fill to provide support to access road

4000 wide access track

w Flo inforced N8) or re C pipe (S 10000 long V P u m )x Ø600m (Class 4 concrete

Install precast concrete wingwall

ingwalls

Overall 11670 -

cluding w length in

Rebuild access road over approximate 30m length & upgrade existing culvert with new Ø600mm culvert

Install precast concrete wingwall New Engineered fill to provide support to access road

SCOPE OF WORK: 1. Remove existing top soil & access road approx 1500mm depth. 2. Remove existing culvert & install new longer culvert. 3. Re-build access road over approx 30m length with Tensar TX160 Grid & Engineered fill.

Plan of Culvert Scale 1:100 A3)

11670 - Overall length including wingwalls

6000 New Engineered fill to provide support to access road

4000 wide access track

Re-build acess road with Tensar TX160 Grid & Engineered fill to reduce existing vertical alignment.

Ø600mm uPVC pipe (SN8) or reinforced concrete (Class 4) x 10,000 long

Install precast concrete wingwall

NOTE: Culvert must be benched into stream at least 20% of culvert Ø

Structure Lifespan

Class 1 - 0.85HN

1500

Traffic Loading

< 0.9 m3/s, no over topping

Under cut existing access road min 1.5m deep & rebuild with Engineer fill & 1 layer of Tensar TX160 Grid over 30m length

Discharge for 20 year return period event

NOTE: Design criteria to be verified during detailed design phase & before construction commences.

Install precast concrete wingwall

Ø600mm uPVC pipe (SN8) or reinforced concrete (Class 4) x 10000 long

Section Through Culvert Scale 1:100 A3)

202 Broadway Ave | Box 1594 | Palmerston North phone: 06 357 5448 | mobile: 021 430 107 | email: steven@charlesconsulting.co.nz

Charles Consulting Ltd copyright: This drawing and its contents are owned by Charles Consulting Ltd. Any reproduction in part or full is forbidden unless prior permission is given in writing

NOTE: New culvert to be placed same height & same alignment as existing.

Civil Drawings:

Culvert Number 7 - Proposed Upgrade

Elevation of Culvert Scale 1:50 (A3)

Foxtrot Culvert Access Track Inspections

A3 Original Drawing Status: Date: Designed by: SGC Filename / Job No: Foxtrot Culvert Inspections / 3035 Investigation & Report 29.08.19 Prepared by: JFC Revision: R0 Sheet: Scale: 1:100, 1:50 (A3) C2 Approved by: SGC 1:50, 1:20 (A1)

RevNo:

Revision note:

Date:

Signature:

Checked:

approx 500 to 475 cover

Google Earth Location

Culvert Location: (World Geodetic System 84)

5000 wide access track

S 40° 25' 21.5" E 175° 38' 05.7" Height: 89m

Flow Ø300 to 325 PVC corrugated pipe x 6000 long

Ø300 to

325 PVC

Section Through Culvert / Ford corrugate

d pipe x

6000 lon

Scale 1:50 A3)

View of accessway over culvert / ford

approx 500 to 450 cover

Flow

Ø300 to 325 PVC corrugated pipe x 6000 long

View of culvert inlet

Plan of Culvert / Ford

Elevation of Culvert / Ford

Scale 1:100 A3)

Scale 1:50 A3)

To safely carry Class 1 traffic (0.85 HN) strengthen access road over pipe. Refer Sheet C2

View of culvert pipe

202 Broadway Ave | Box 1594 | Palmerston North phone: 06 357 5448 | mobile: 021 430 107 | email: steven@charlesconsulting.co.nz

Charles Consulting Ltd copyright: This drawing and its contents are owned by Charles Consulting Ltd. Any reproduction in part or full is forbidden unless prior permission is given in writing

Civil Drawings:

Culvert Number 8 - Existing

Foxtrot Culvert Access Track Inspections

RevNo:

Revision note:

Date:

Signature:

Checked:

Strengthen access track over pipe 2400 wide x 25mm steel plate to be centralized over existing culvert with 300mm granular fill placed over

Well compacted granular fill

Resource Consent Only

4000 steel plate

500

5000 wide access track

Flow

Ø300 to 325 PVC corrugated pipe x 6000 long

Ø300 to

325 PVC

corrugate

d pipe x

Section Through Culvert / Ford

6000 lon

Scale 1:50 A3)

≈6000 e

xtent of

granula r fill ove

Existing

Flow

2400

2400 wide x 25mm steel plate to be centralized over existing culvert with 300mm granular fill placed over

4000

2400 wide x 25mm steel plate to be centralized over existing culvert with 300mm granular fill over

Existing Ø300 to 325 PVC corrugated pipe x 6000 long

Plan of Culvert / Ford

Elevation of Culvert / Ford

Scale 1:100 A3)

Scale 1:50 A3)

202 Broadway Ave | Box 1594 | Palmerston North phone: 06 357 5448 | mobile: 021 430 107 | email: steven@charlesconsulting.co.nz

Charles Consulting Ltd copyright: This drawing and its contents are owned by Charles Consulting Ltd. Any reproduction in part or full is forbidden unless prior permission is given in writing

Civil Drawings:

Culvert Number 8 - Proposed Upgrade

Foxtrot Culvert Access Track Inspections

RevNo:

Revision note:

Date:

Signature:

Checked:

No Upgrade Required

Google Earth Location

Culvert Location: (World Geodetic System 84)

ce ss t

ra c

S 40° 25' 25.8" E 175° 38' 10.4" Height: 93m

700

Rubber tyres

Ø600 x 6000 long PVC / fiberglass corrugated pipe

Rubber tyres

View of accessway over culvert Flow

Elevation of Culvert (Tyre Side) Scale 1:50 (A3)

4000 wide access track

Ø600 x 6000 long PVC / fiberglass corrugated pipe

View of culvert outlet

Plan of Culvert

Elevation of Culvert

Scale 1:100 (A3)

Scale 1:50 (A3)

View of culvert outlet

202 Broadway Ave | Box 1594 | Palmerston North phone: 06 357 5448 | mobile: 021 430 107 | email: steven@charlesconsulting.co.nz

Charles Consulting Ltd copyright: This drawing and its contents are owned by Charles Consulting Ltd. Any reproduction in part or full is forbidden unless prior permission is given in writing

Civil Drawings:

Culvert Number 9 - Existing

Foxtrot Culvert Access Track Inspections

RevNo:

Revision note:

Date:

Signature:

Checked:

Stock fence

tra ck

S 40° 25' 28.5" E 175° 37' 24.0" Height: 81m

No Upgrade Required

Google Earth Location

ce ss

(World Geodetic System 84)

Stock fence

Culvert Location:

Ø300mm uPVC culvert x 12000 long

Flow

View of accessway over culvert

Plan of Culvert Scale 1:100 (A3)

≈ 500 to 600 cover

View of culvert outlet

Ø uP 300 VC m cu m lve rt

Elevation of Culvert Scale 1:20 (A3)

View inside culvert

202 Broadway Ave | Box 1594 | Palmerston North phone: 06 357 5448 | mobile: 021 430 107 | email: steven@charlesconsulting.co.nz

Charles Consulting Ltd copyright: This drawing and its contents are owned by Charles Consulting Ltd. Any reproduction in part or full is forbidden unless prior permission is given in writing

Civil Drawings:

Culvert Number 10 - Existing

Foxtrot Culvert Access Track Inspections

RevNo:

Revision note:

(World Geodetic System 84)

5300

e access 4000 wid

Signature:

Checked:

To safely carry Class 1 traffic (0.85 HN) replace existing culvert with new culvert. Refer Sheet C2

Culvert Location: S 40Â° 25' 29.7" E 175Â° 37' 35.5" Height: 73m

Date:

track

Google Earth Location Flow

View of accessway over culvert

Stock fen c

tra

Stock fen c

Unknown structure maybe concrete slabs over small water channel

Plan of Culvert Scale 1:100 (A3)

4000 access track

300

Elevation of culvert - Inlet side

Stock fence

5300

Section Through Culvert Scale 1:50 (A3)

Unknown structure maybe concrete slabs over small water channel

Elevation of culvert - Outlet side

202 Broadway Ave | Box 1594 | Palmerston North phone: 06 357 5448 | mobile: 021 430 107 | email: steven@charlesconsulting.co.nz

Charles Consulting Ltd copyright: This drawing and its contents are owned by Charles Consulting Ltd. Any reproduction in part or full is forbidden unless prior permission is given in writing

Civil Drawings:

Culvert Number 11 - Existing

Foxtrot Culvert Access Track Inspections

RevNo:

Revision note:

Date:

Signature:

Checked:

DESIGN CRITERIA Catchment Size Discharge for 5 year return period event to pass pipe Discharge for 20 year return period event Traffic Loading Structure Lifespan

< 1 ha < 0.1m³/s < 0.1 m3/s, no over topping Class 1 - 0.85HN

}

NOTE: Design criteria to be verified during detailed design phase & before construction commences.

Not less than 50 years idth 4000

ack min w Access tr

including wingwalls 7320 - Overall length

Install precast concrete wingwall

16) or reinforced Ø300mm uPVC pipe (SN 6000 long x 4) ss (Cla te cre con

Flow

Upgrade existing culvert with new Ø300mm culvert

Stock fen

Form new earth bank to suit each end of culvert

tra

Stock fe

nce

Resource Consent Only

Install precast concrete wingwall

Plan of Culvert Scale 1:100 (A3)

7320 - Overall length including wingwalls

300min cover

Install precast concrete wingwall

Ø300mm uPVC pipe (SN16) or reinforced concrete (Class 4) x 6000 long

Install precast concrete wingwall

Ø300mm uPVC pipe or reinforced concrete (Class 4) x 6000 long

Section Through Culvert

Elevation of Culvert

Scale 1:50 (A3)

Scale 1:25 (A3)

202 Broadway Ave | Box 1594 | Palmerston North phone: 06 357 5448 | mobile: 021 430 107 | email: steven@charlesconsulting.co.nz

NOTE: Culvert must be benched into stream at least 20% of culvert Ø

Stock fence

Access track Access track min width 4000

Charles Consulting Ltd copyright: This drawing and its contents are owned by Charles Consulting Ltd. Any reproduction in part or full is forbidden unless prior permission is given in writing

Civil Drawings:

Culvert Number 11 - Proposed Upgrade

Foxtrot Culvert Access Track Inspections

RevNo:

Revision note:

Date:

Signature:

Checked:

Culvert Location: (World Geodetic System 84)

S 40° 25' 26.4" E 175° 37' 35.5" Height: 73m

To safely carry Class 1 traffic (0.85 HN) strengthen access road over pipe. Refer Sheet C2

4000 wide access track

2100

Google Earth Location Ø900 x 8000 long concrete culvert (60mm wall thickness)

Flow Concrete wing walls

View of accessway over culvert

6000

200

Ø900 x 8000 long concrete culvert (60mm wall thickness)

C wi oncr ng et wa e lls

Timber gate

Fence

3350 timber gate

Plan of Culvert

Elevation of Culvert

Scale 1:100 (A3)

Scale 1:50 (A3)

Close up view of culvert

200 cover

4000 wide access track

Ø900 x 8000 long concrete culvert (60mm wall thickness)

View of culvert outlet

Elevation of Culvert Scale 1:50 (A3)

202 Broadway Ave | Box 1594 | Palmerston North phone: 06 357 5448 | mobile: 021 430 107 | email: steven@charlesconsulting.co.nz

Charles Consulting Ltd copyright: This drawing and its contents are owned by Charles Consulting Ltd. Any reproduction in part or full is forbidden unless prior permission is given in writing

Civil Drawings:

Culvert Number 12 - Existing

Foxtrot Culvert Access Track Inspections

RevNo:

4000 wide access track

Revision note:

Date:

Signature:

Checked:

Strengthen access track over culvert

New compacted granular overlay min 300mm depth over steel plate

2400 long 2400 wide x 25mm steel plate to be centralized over existing culvert with 300mm granular fill

Flow

8000 - Overall length

4000

Existing Ø900 x 8000 long concrete culvert

New compacted granular overlay min 300mm depth over steel plate

2400 wide x 25mm steel plate to be centralized over existing culvert with 300mm granular fill over 4000 steel plate

1000

200

300

1000

Existing Ø900 x 8000 long concrete culvert

Plan of Culvert

Elevation of Culvert

Scale 1:100 (A3)

Scale 1:50 (A3)

2400 wide x 25mm steel plate to be centralized over existing culvert with 300mm granular fill over

Existing timber gate

Well compacted granular fill

Existing Ø900 x 8000 long concrete culvert

8000

lls

cre

n co

ist ing

Approx 6000

wi ng

Resource Consent Only

8000 - Overall length

5000

Elevation of Culvert Scale 1:50 (A3)

202 Broadway Ave | Box 1594 | Palmerston North phone: 06 357 5448 | mobile: 021 430 107 | email: steven@charlesconsulting.co.nz

Charles Consulting Ltd copyright: This drawing and its contents are owned by Charles Consulting Ltd. Any reproduction in part or full is forbidden unless prior permission is given in writing

Civil Drawings:

Culvert Number 12 - Proposed Upgrade

Foxtrot Culvert Access Track Inspections

RevNo:

Revision note:

Stock fence Ø22 5

rein

forc e

d co

ncre

te p

ipe

Signature:

Checked:

To safely carry Class 1 traffic (0.85 HN) replace existing culvert with new culvert. Refer Sheet C2

Flow

Google Earth Location

Date:

Culvert Location: (World Geodetic System 84)

S 40° 25' 23.9" E 175° 37' 40.2" Height: 103m x 70

00 l ong

5000 to 4000 wide access track

View of accessway over culvert

Plan of Culvert Scale 1:50 (A3)

500 to 600

Stock fence

Close up view of culvert

Access track

Rubber tyres

Access track

Ø225 reinforced

View of inside culvert

concrete pipe x

7000 long

Ø225 reinforced concrete pipe x 7000 long

≈ 30mm wall thickness

Elevation of Culvert

Scale 1:50 (A3)

Scale 1:25 (A3)

202 Broadway Ave | Box 1594 | Palmerston North phone: 06 357 5448 | mobile: 021 430 107 | email: steven@charlesconsulting.co.nz

Charles Consulting Ltd copyright: This drawing and its contents are owned by Charles Consulting Ltd. Any reproduction in part or full is forbidden unless prior permission is given in writing

Civil Drawings:

Culvert Number 13 - Existing

Foxtrot Culvert Access Track Inspections

RevNo:

Revision note:

Date:

Signature:

Checked:

DESIGN CRITERIA

Discharge for 20 year return period event Traffic Loading Structure Lifespan

< 0.1m³/s < 0.1 m3/s, no over topping Class 1 - 0.85HN

}

NOTE: Design criteria to be verified during detailed design phase & before construction commences.

Upgrade existing culvert with new Ø300mm culvert

Not less than 50 years

Armour side water channel / entry with 100 to 200mm size rip rap rock

New

Ø30 0

732

mm u

PVC

pipe

(SN

Resource Consent Only

Install precast concrete wingwall

0-O

8) o

vera

r rei

ll len

gth

inclu

ding

nfor

ced con cret e

wing w

alls

(Cla

ss 4 )

x 60

00 l

ong

Access track min width 4000

Install precast concrete wingwall

New Engineered fill

Plan of Culvert Scale 1:50 (A3)

Access track

300 min cover

7320 - Overall length including wingwalls Access track min width 4000

Install precast concrete wingwall Install precast concrete wingwall

Install precast concrete wingwall New Ø300mm uP

202 Broadway Ave | Box 1594 | Palmerston North phone: 06 357 5448 | mobile: 021 430 107 | email: steven@charlesconsulting.co.nz

Charles Consulting Ltd copyright: This drawing and its contents are owned by Charles Consulting Ltd. Any reproduction in part or full is forbidden unless prior permission is given in writing

VC pipe (SN8) or

reinforced concre te (Class 4) x 6000

NOTE: Culvert must be benched into stream at least 20% of culvert Ø

Discharge for 5 year return period event to pass pipe

< 1 ha

Stock fence

Catchment Size

Ø300mm uPVC pipe or reinforced concrete (Class 4) x 6000 long

long

Section Through Culvert

Elevation of Culvert

Scale 1:50 (A3)

Scale 1:25 (A3)

Civil Drawings:

Culvert Number 13 - Proposed Upgrade

Foxtrot Culvert Access Track Inspections

RevNo:

Revision note:

Date:

Signature:

Checked:

Culvert Location: (World Geodetic System 84) Flow

S 40° 25' 24.6" E 175° 37' 42.2" Height: 112m

Google Earth Location

Ø22 5 re infor ced conc re

te pip

ex5

000

to 60

00 lo

4000 wide access track

View of accessway over culvert

Plan of Culvert Scale 1:50 (A3)

300 to 400 cover

Close up view of culvert

To safely carry Class 1 traffic (0.85 HN) replace existing culvert with new culvert. Refer Sheet C2 Buried outlet

Ø225 reinforced con

crete pipe x 5000

to 6000 long

Section of Culvert Scale 1:50 (A3)

View of culvert outlet

202 Broadway Ave | Box 1594 | Palmerston North phone: 06 357 5448 | mobile: 021 430 107 | email: steven@charlesconsulting.co.nz

Charles Consulting Ltd copyright: This drawing and its contents are owned by Charles Consulting Ltd. Any reproduction in part or full is forbidden unless prior permission is given in writing

Civil Drawings:

Culvert Number 14 - Existing

Foxtrot Culvert Access Track Inspections

RevNo:

Revision note:

Date:

Signature:

Checked:

DESIGN CRITERIA Discharge for 5 year return period event to pass pipe Discharge for 20 year return period event Traffic Loading Structure Lifespan

< 1 ha < 0.1m³/s < 0.1 m3/s, no over topping Class 1 - 0.85HN

}

NOTE: Design criteria to be verified during detailed design phase & before construction commences. Flow

Catchment Size

Not less than 50 years

Precast concrete wingwall

7320 -

Ø30 0mm

uPV

C pip

e (S

Upgrade existing culvert with new Ø300mm culvert

Ove rall le ngth inclu d

N8)

ing w ingw alls or re infor ced conc rete (Cla ss 4 )x6 0

00 lo n

Resource Consent Only

4000 wide access track Precast concrete wingwall

Plan of Culvert Scale 1:50 (A3)

Access track

Install precast concrete wingwall

300 min cover

Access track min width 4000 Install precast concrete wingwall

Access track

Ø300mm uPVC pipe (SN8)

NOTE: Culvert must be benched into stream at least 20% of culvert Ø

7323 - Overall length including wingwalls

Install precast concrete wingwall

Ø300mm uPVC pipe or reinforced concrete (Class 4) x 6000 long

or reinforced concrete (Cla ss 4) x 6000 long

Elevation of Culvert Scale 1:25 (A3)

Section of Culvert Scale 1:50 (A3)

202 Broadway Ave | Box 1594 | Palmerston North phone: 06 357 5448 | mobile: 021 430 107 | email: steven@charlesconsulting.co.nz

Charles Consulting Ltd copyright: This drawing and its contents are owned by Charles Consulting Ltd. Any reproduction in part or full is forbidden unless prior permission is given in writing

Civil Drawings:

Culvert Number 14 - Proposed Upgrade

Foxtrot Culvert Access Track Inspections

APPENDIX C: PERMITTED ACTIVITY ASSESSMENT

19 September 2019 Emma Comrie-Thomson By e-mail: Emmac@4Sight.co.nz Dear Emma, Re: Turitea Wind Farm – Enabling Culvert Works for Access Road on Property H This letter provides a further assessment of proposed transmission line enabling works in relation to the proposed culverts, with the following assessment showing that they can be carried out as permitted activities in terms of the Horizons Regional Council One Plan. The plans reviewed for the purposes of this assessment are the set of plans prepared by Charles Consulting for Electrix, titled Foxtrot Culvert Access Track Inspections and dated 18/09/2019, revisions R0. In summary, the enabling culvert works will be carried out within the Regional Plan’s permitted activity standards. The rationale for this conclusion is set out in the assessment below.

1. Proposed Culvert Works Fourteen culverts are involved in the enabling works. The locations of the culverts and proposed works are identified on the proposed plans and are set out in the table below: Culvert # 1 2 3 4 5 6 7 8 9 10 11 12 13 14

Existing 225mm Ø x 5m long concrete and tyres 225mm Ø x 7m long Tyres and fence posts 1150mm Ø x 6m long plastic pipe 500mm Ø x (approx.) x 6m long plastic pipe 300mm Ø x 6m long plastic pipe 300mm Ø concrete pipe 225mm Ø reinforced concrete pipe 300mm Ø x 6m long plastic pipe 600mm Ø x 6m long plastic pipe 300mm Ø x 12m long plastic pipe Unknown Culvert Structure. 5.3m in length. 900mm Ø x 8m long plastic pipe 225mm Ø x 7m long tyres and concrete 300mm Ø x 6m long tyres and concrete

New 450mm Ø x 7.670m long concrete 600mm Ø x 13.670m long concrete No change. 500mm Ø plastic x 7m long (no change to pipe but inclusion of wing-wall) 300mm Ø concrete x 7.320m long concrete. 450mm Ø x 16.070m long concrete 600mm Ø x 11.67m long concrete No Change, with track upgrade occurring above. No Change. No Change. 300mm Ø concrete x 7.320m long concrete. No Change, with track upgrade occurring above. 300mm Ø x 7.320m long concrete 300mm Ø x 7.320m long concrete

All of the existing culverts are in a poor to average state of repair and some are not well sited in terms of their depth relative to the drainage. The culverts are located within flat to rolling pasture-land under existing farm tracks. The replacement culverts will be a larger diameter than the existing culverts with

the invert seated at the right level relative to the drainage. None of the drainage that flows into either the existing culverts, or at the site of the new culvert, appears to be an “active bed” as defined by the One Plan, because the beds are predominantly vegetated.

2. Relevant Definitions The following definitions are taken from the Glossary Section of the Horizons Regional Council One Plan

Land disturbance The One Plan defines Land Disturbance as: “disturbance of the land surface by any means including by blading, blasting, contouring, cutting of batters, filling, excavating, ripping, root raking, recontouring, or moving or removing soil or earth”. The definition of land disturbance excludes: “(e) the maintenance or upgrade of existing tracks, structures (including fences) or infrastructure”. This definition is relevant as part of the enabling works involves the maintenance and upgrade of existing farm tracks. There will be some small-scale land disturbance associated with:  

The installation of culverts; and The formation of new tracks.

However, in our opinion, the placement of metal on geofabric to create temporary tracks does not meet the definition of land disturbance as it will have no effect on the land surface. This interpretation was confirmed Horizons by representatives at a previous meeting on 5 June 2019.

Maintenance and upgrade One Plan definitions of “maintenance” and “upgrade” are relevant in the context of the small-scale land disturbance rule, and also structures in, on or under the bed of a river 1. “Maintenance means all actions which have the objective of retaining or restoring a structure, system, facility or installation in or to a state in which it can perform its required function, provided maintenance actions themselves do not give rise to any significant adverse effects, and where the character, intensity and scale of the adverse effects of the structure, system, facility or installation remain the same or similar. Maintenance includes: … (e) the maintenance of a track.” “Upgrade means bringing a structure, system, facility or installation up to date or to improve its functional characteristics, provided the upgrading itself does not give rise to any significant adverse effects, and the character, intensity and scale of any adverse effects of the upgraded structure, system, facility or installation remain the same or similar.” This is relevant to the replacement of existing culverts that will be carried out. We consider that the culvert replacements can be assessed as either maintenance or upgrading. However, we have carried out an assessment against the permitted criteria for new culverts and have found the culverts to comply irrespective.

Active bed The One Plan definition of “active bed” is “the bed of a river that is intermittently flowing and where the bed is predominantly unvegetated and comprises sand, gravel, boulders or similar material”.

The RMA defines the term “river” to include most watercourses – regardless of whether it flows permanently or intermittently

Culvert H Review of Access Road PA_V1.0 19 September 19

This definition is relevant in the context of small-scale land disturbance and the replacement of existing culverts. The affected watercourses do not appear to meet the definition of having an active bed, as they are predominantly vegetated.

3. Culverts Permitted Activity Rule The following assessment has been carried out in relation to the proposed culverts. Rule Comment 13.3 Rules - Vegetation clearance*, land disturbance*, forestry* and cultivation* and indigenous biological diversity 13-1 Small-scale land disturbance* Except as regulated by Rules 13-6, 13-8 and 139, any land disturbance*pursuant to s9(2) RMA of a total area up to 2500 m2 per property* per 12-month period and any ancillary: a. diversion of water pursuant to s14(2) RMA on the land where the land disturbance*is undertaken, or b. discharge of sediment into water pursuant to s15(1) RMA resulting from the land disturbance* Standards a. The activity must not take place on land that is within a coastal foredune*. b. Erosion and sediment control methods, which may include bunding, silt traps, interception drains or other alternative methods, to minimise sediment discharge to water must be installed prior to, and maintained during, the land disturbance* activity c. Any ancillary discharge of sediment into water must not, after reasonable mixing, cause the receiving water body to breach the water quality standards for visual clarity set out in Schedule E for that water body. d. The activity must not occur on landthat is in, or within 5 m of: i. the bed of a river that is permanently flowing, ii. the bed of a river that is not permanently flowing and has an active bed* width greater than 1 m, iii. the bed of a lake. e. The activity must not occur on land that is in, or within 10 m of: i. A wetland as identified in Schedule F,

Complies in regard to a, b and c with appropriate sediment control methods during construction

Met. Under 2,500m2 across each site and does not constitute an active bed/ permanently flowing.

Culvert H Review of Access Road PA_V1.0 19 September 19

ii.

Sites valued for Trout Spawning as identified in Schedule B, iii. Sites of Significance - Aquatic as identified in Schedule B. CHAPTER 17: ACTIVITIES IN ARTIFICIAL WATERCOURSES, BEDS OF RIVERS AND LAKES, AND DAMMING 17.3 General Conditions for Permitted Activities and Controlled Activities involving the Beds of Rivers and Lakes a. The activity must not adversely reduce All standards will be complied with during the ability of the water body or its bed construction phase. to convey flood flows, floating debris or sediment, except for a period of not more than 12 consecutive hours during construction. b.

There must be no discharge of contaminants, other than sediment and other contaminants inherent to the water or bed, into the river or lake except where the discharge is explicitly allowed by the activity description of a rule in this chapter.

Any discharge of sediment into water directly caused by the activity, that causes the visual clarity standards in Schedule E to be breached, must not be undertaken for more than 24 hours in total across 5 consecutive days. There must be no more than one activity per river per property* in any 12 month period.

Any discharge of sediment into water under (c) must not, after reasonable mixing*, cause any conspicuous change in the colour of water in the receiving water or any change in horizontal visibility greater than the target set in the visual clarity % change column of Schedule E, more than 12 hours after completion of the activity. Any materials used must be necessary for the activity and must not be toxic to aquatic ecosystems.

Any materials no longer required as part of the activity, including any temporary structures, must not be stored in or on the bed of any river

Culvert H Review of Access Road PA_V1.0 19 September 19

or lake and must be removed after completion of the activity. g.

Refuelling of machinery must not take place in any area where spills may enter surface water.

The activity must be undertaken in a manner that provides for the safe passage of fish both upstream and downstream, including past any structure.

Any diversion of water required for works ancillary to a structure must be temporary, must be within the bed of the river, must not exceed 100 m in length, must not be between catchments, must not involve a lake, and the diversion channel must have sufficient capacity to carry the same flow as the original channel.

Upon completion of any channel bank works, the banks must be reinstated to a natural contour and revegetated.

Any straightening or channelling of a river must not exceed a length equal to two times the bed width of the river in any 2 km length of river in any 12 month period.

There must be no removal of instream woody debris less than 2 m3 in size unless this is required to reduce the risk of flooding or erosion.

17.5 Rules - Use, Maintenance*, Upgrade*, Removal and Demolition of Structures 17.4 Use of Structure (Permitted) The use of a structure located in, on, under or over the bed of a river or lake pursuant to s13(1) RMA, and any ancillary: a.

All culverts will comply as structures in this regard.

damming or diversion of water pursuant to s14(2) RMA, excluding the damming of water associated with dam structures (which is regulated by the rules in Section 17.6)

Culvert H Review of Access Road PA_V1.0 19 September 19

discharge of water or sediment into water or onto or into land pursuant to ss15(1) or 15(2A) RMA.

17-5 Maintenance* and upgrade* of structures, and ancillary removal of bed material and plants (Permitted) a.

Structures - The maintenance* or upgrade* of a structure located in, on, under or over the bed of a river or lake pursuant to s13(1) RMA, and any ancillary: i. excavation, drilling, tunnelling or other disturbance of the river or lake bed pursuant to s13(1) RMA ii. damming or diversion of water pursuant to s14(2) RMA iii. discharge of water or sediment into water or onto or into land pursuant to ss15(1) or 15(2A) RMA iv. deposition of substances in or on the bed of the river or lake pursuant to s13(1).

Ancillary removal of bed material and plants - The removal or other disturbance of bed material pursuant to s13(1) or the disturbance, removal, damage, or destruction of plants pursuant to s13(2) RMA for the purpose of maintaining the functional integrity of a structure located in, on, under or over the bed of a river or lake, including flushing accumulated bed material, and any ancillary: i. damming or diversion of water pursuant to s14(2) RMA ii. discharge of water or sediment into water or onto or into land pursuant to ss15(1) or 15(2A) RMA iii. deposition of removed bed material or plants in or on the bed pursuant to s13(1) RMA iv. discharge of removed bed material or plants into water

Culverts will comply in this regard as considered maintenance and upgrade.

Will comply in this regard as any clearance is maintaining the functional integrity in this regard.

Culvert H Review of Access Road PA_V1.0 19 September 19

or onto or into land pursuant to ss15(1) or 15(2A) RMA deposition of substances in or on the bed of the river or lake pursuant to s13(1).

Standard a. b.

The activity must comply with the general conditions listed in Section 17.3. Any discharge of removed bed material or plants onto or into land must comply with the conditions of Rule 14-27, except for condition 14-27(c)(ii) and condition 14-27(b) with regard to cleanfill material*.

Complies as previously established under 17.3.

Will comply. 14-27 pertains to discharges. No discharges sought provided any additional fill is clean-fill.

17-6 Removal and demolition of structures (Permitted) Except as regulated by Rule 17-15, the removal or demolition of a structure located in, on, under or over the bed of a river or lake pursuant to s13(1) RMA, and any ancillary: a. excavation, drilling, tunnelling or other disturbance of the river or lake bed pursuant to s13(1) RMA b. damming or diversion of water pursuant to s14(2) RMA c. discharge of water or sediment into water or onto or into land pursuant to ss15(1) or 15(2A) RMA d. deposition of substances in or on the bed of the river or lake pursuant to s13(1). 17.6 Rules - Dams and Damming 17-7 New and existing small dams (Permitted)

Not Applicable.

17-8 Replacement consents for existing damming of water (Controlled) 17.7 Rules- Other Structures 17-9 Lines, cables, pipelines and ropeways 17-10 Culverts (Permitted)

Not Applicable.

The erection, placement, or extension of a culvert in, on, under or over the bed of a river

Culvert H Review of Access Road PA_V1.0 19 September 19

or lake pursuant to s13(1) RMA and any ancillary: a. excavation, drilling, tunnelling or other disturbance of the river or lake bed pursuant to s13(1) RMA b. damming or diversion of water pursuant to s14(2) RMA c. discharge of water or sediment into water or onto or into land pursuant to ss15(1) or 15(2A) RMA d. deposition of substances in or on the bed of the river or lake pursuant to s13(1). Standards a.

A new culvert must not be erected or placed in: i. a river or lake regulated under Rule 17-3 ii. a reach of a river with a Schedule B Value of Flood Control and Drainage, unless the work is undertaken by or on behalf of the Regional Council. Where multiple culverts are placed side by side, the total cross-sectional area of the multiple culverts must not be less than that of a single culvert which complies with this rule The culvert, associated fill and culvert placement must comply with the following dimensions: i. a maximum culvert length of 20 m ii.

for circular culverts a culvert diameter of 0.3 m to 1.2 m (inclusive)

iii.

for non-circular culverts a width and height of 0.3 m to 1.2 m each (inclusive)

iv.

a maximum fill height of 2 m above the top of the culvert unless a spillway is constructed to enable the passage of a 200

Complies. Not in an identified stream under Schedule B

Complies. Although Culverts are along same stream system, they are not side by side, with adequate separation.

Complies. All culverts under 20m. Complies. All culverts comply in this regard with a diameters within this range. Not Applicable. No, non-circular culverts are proposed.

Complies. No fill height over 2m proposed.

Culvert H Review of Access Road PA_V1.0 19 September 19

d. e.

year flood without the fill being overtopped a minimum culvert installation depth below the bed of 20% of the width of the culvert.

The culvert must be positioned so that its alignment and gradient are the same as the river The culvert must be constructed to allow: i. the flow from a 5% annual exceedance probability (20 year return period) flood event without overtopping, unless the overtopping flows to a specifically designed spillway ii. the flow from a 2 year return period flood event without any flow impediment.

The culvert inlet and outlet must be protected against erosion.

All practicable steps must be used to minimise the release of sediment during construction.

The culvert must be constructed and maintained to avoid any aggradation or erosion of the bed.

The culvert must be kept clear of accumulated debris.

The activity must comply with the general conditions listed in Section 17.3. The activity must not take place in any rare habitat*, threatened habitat* or at-risk habitat*.

17-11 Other structures including bridges, fords and other access structures 17-13 Bridges and culverts constructed to comply with Rules 14-1 to 14-4 (controlled)

Complies. Designed to comply with this provision. Complies. Culverts designed to align.

Complies. The culverts are designed to cater for a 5% annual exceedance probability and to allow for the flow from a 2 year return period flood event without flow impediment.

Complies. The culverts have been designed to protect against erosion, with the inclusion of design features such as thewing-wall structure etc. Will comply by way of appropriate construction and sediment management.

Complies. Been designed to avoid erosion.

Will Comply by way of regular maintenance.

Complies. 17.3 previously assessed. Complies. Activity is not taking place in these areas.

Complies. No bridges being sought with all roading structures going over culverts. Complies. No discharges occurring under 14.1 I 14-4

Culvert H Review of Access Road PA_V1.0 19 September 19

Rule 17-14 Activities undertaken by or on behalf of the Regional Council in rivers with a Schedule B Value of Flood Control and Drainage 17-15 Activities affecting Schedule B Value of Flood Control and Drainage 17-16 Small-scale gravel extraction 17-17 Other gravel extraction 17-18 Other minor bed disturbances 17-19 Plants (Permitted) 17-20 Minor activities involving artificial watercourses* 17-21 Bed disturbance of non-natural lakes to maintain their function 17-22 Activities that do not comply with permitted activity rule general conditions (Restricted Discretionary) 17-23 Activities that do not comply with permitted activity, controlled activity or restricted discretionary activity rules and all other s13(1) RMA activities not covered by this chapter

Not Applicable. Not Applicable. Not Applicable. Not Applicable. Complies. Not regulated under rule 17.3 and complies with general conditions. Complies. Complies with standards 17.3 and not occurring in Schedule B areas or any other sensitive areas. Not Applicable. Not Applicable.

Not Applicable. Complies.

4. Summary Electrix will carry out initial enabling works for the Turitea Wind Farm transmission line within property H, all of which can comply with permitted activity rules for installation of culverts and for small-scale land disturbance. Electrix requests that Council provides an early response to this assessment, so that the enabling works can commence as soon as possible. Kind Regards,

Matthew Thode Senior Planning and Policy Consultant 4Sight Consulting Ltd

Culvert H Review of Access Road PA_V1.0 19 September 19