Silverbirch Wind Farmsilverbirchwindfarm.com/.../04/Appendix-11-A-Osprey-Aviation-Impact... · aviation, including aviation operations at Kerry Airport. Osprey uses a number of resources,

COMMERCIAL IN CONFIDENCE

Date: 20 June 2016

Author: Steve Hyam

Revision: Issue 2

Osprey Ref: 70958 001

This document is of UK origin and has been prepared by Osprey Consulting Services Limited (Osprey) and, subject to any existing rights of third parties, Osprey is the owner of the copyright therein. The document is furnished in confidence under existing laws, regulations and agreements covering the release of data. This document contains proprietary information of Osprey and the contents or any part thereof shall not be copied or disclosed to any third party without Osprey’s prior written consent.

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Silverbirch Wind Farm

Aviation Impact Assessment


Silverbirch Wind Farm | Document Details

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Document Details

Reference Description

Document Title Silverbirch Wind Farm

Aviation Impact Assessment

Document Ref 70958 001

Issue Issue 2

Date 20 June 2016

Client Name Silverbirch Renewables Ltd

Classification Commercial in Confidence

Issue Amendment Date

Draft A Initial Draft Document 22 December 2015

Draft B Client Comments Addressed 7 January 2016

Draft C Additional Comments Addressed 19 February 2016

Issue 1 Document Issue 01 March 2016

Issue 2 Updated Turbine Coordinates 20 June 2016

Approval Level Authority Name

Author Osprey CSL Steve Hyam

Internal Approval Osprey CSL Stewart Heald

Client 1 Approval Silverbirch Renewables Ltd Gene McGillycuddy

Client 2 Approval Silverbirch Renewables Ltd Damien Courtney


Silverbirch Wind Farm | Executive Summary

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Executive Summary

Silverbirch Renewables Ltd is proposing the development of the Silverbirch Wind Farm in County Kerry, between 3 and 5 kilometres (km) southwest of Ballydesmond. The development is expected to consist of fourteen wind turbines of a maximum blade tip height of 150 metres (m) above ground level (agl). Silverbirch Renewables Ltd has instructed Osprey Consulting Services Ltd (Osprey) to undertake an aviation impact assessment, including an assessment of the potential for the development to affect operations of Kerry Airport.

Effects Analysis

Obstacle Limitation Surfaces

Obstacles inside and outside an aerodrome boundary can affect flight operations, including take-off and landing, and procedures designed to facilitate these activities at an aerodrome. Guidance on how aerodromes should manage operations in relation to obstacles and the licensing of an aerodrome depends on the extent to which these areas are free from current or new obstacles. The proposed Wind Farm is in proximity to the Obstacle Limitation Surfaces (OLS) established at Kerry Airport.

Analysis indicates that the Wind Farm is outside of the lateral confines of, and will therefore not breach the Outer Horizontal Surface at the Airport. Additionally, the development is outside the Approach and Take-off Climb Surfaces and therefore would not breach any OLS established at Kerry Airport.

Instrument Flight Procedures

Instrument Flight Procedures (IFP) are in place at airports to describe the standard routes for aircraft to follow on approach to the airport, allowing aircraft to accurately line up with the runway and descend safely. Furthermore, separate IFP are designed to allow aircraft to depart the airport on preferential routes that allow them to integrate into the en-route structure. Obstacles such as wind energy developments can present a physical obstruction to the containment areas for IFP.

The Wind Farm potentially could fall within the obstacle containment areas of Kerry Airport published IFP. Although the possibility of the containment areas being impacted is extremely remote, further analysis may be required to determine the potential for an effect on defined established IFPs. The only IFP at Kerry Airport to be potentially impacted upon by the Silverbirch wind farm development are four departure procedures that have routes in the vicinity of the wind farm development. However, with the following provided by Silverbirch Renewables Ltd, it is noted that there is another wind farm in the same vicinity, with tip heights higher than those proposed on the Silverbirch development that has already been permitted. It is therefore assumed that this development either does not affect the IFP, or that any impact created to containment areas of the IFP is mitigated for, or would be operationally managed by the airport.

Minumum Sector Altitude


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The Minimum Sector Altitude (MSA) is the lowest altitude which may be used that will provide a minimum clearance of 1,000 feet (ft) above all objects located in the area contained within a sector of a circle of 46 kilometres (km) (25 Nautical Mile (NM)) radius centred on a radio aid to navigation. The Wind Farm is well within 25 NM from the Non-Directional Beacon (NDB) navigation facility located at the Airport. The Wind Farm straddles two MSA sectors of this facility; the lowest altitude of the two is 2,700 ft above mean sea level (amsl).

The maximum anticipated blade tip height within the Wind Farm is no higher than 1,325.5 ft (404 m) (amsl); consequently, there is over 1,000 ft between the highest point of the proposed development and the MSA altitude. Therefore, the proposed development will not affect the MSA relating to the NDB at Kerry Airport. There will no impact arising from the proposed development on MSA.

Instrument Landing System Flight Inspection

Whilst aircraft approaching the Airport utilising the Instrument Landing System (ILS) procedure on approach to Kerry Airport Runway 26 from the east will be unaffected, analysis was required to establish whether the Wind Farm could affect the annual calibration checks carried out on the ILS equipment itself. Part of the flight inspection process for ILS systems includes serials (flight tracks) whereby the inspecting aircraft transits a course perpendicular to the actual runway approach centreline, therefore crossing the centreline at a specific range from the Airport.

Flight Inspection aircraft operate at an altitude to ensure appropriate vertical separation from the neighbouring Cordal Wind Farm. This Wind Farm is located under the approach path to Runway 26 and on significantly higher ground than the proposed Silverbirch development; therefore, the proposed Wind Farm will not have an impact on flight inspection operations for the ILS on Runway 26 at Kerry Airport.

Aviation Obstruction Lighting

The proposed development may be considered as an en-route obstacle and therefore the Irish Aviation Authority (IAA) may require the marking and/or lighting of any obstacle in the interest of aviation safety. Specifically, for obstacles outside of the aerodrome boundary, the responsibility rests with the IAA and the owners of the structures. Subject to consultation with the IAA, Silverbirch Renewables Ltd intend to implement appropriate aviation obstruction lighting to the development.

Recommendations

The following recommendations should be considered:

Kerry Airport will be given notice of the planning application for the proposed development by the local planning authority or the Developer;

Consultation with the IAA should be considered to establish any lighting requirements.


Silverbirch Wind Farm | Table of Contents

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Table of Contents

1 Introduction ............................................................................................................................. 1

1.1 General ................................................................................................................................................................. 1 1.2 Background ........................................................................................................................................................ 1 1.3 Purpose and Scope ......................................................................................................................................... 1

2 Silverbirch Wind Farm .......................................................................................................... 3

2.1 Overview ............................................................................................................................................................. 3

3 Kerry Airport Obstacle Limitation Surfaces Analysis .................................................. 5

3.1 Kerry Airport..................................................................................................................................................... 5 3.2 Obstacle Limitation Surfaces Overview ............................................................................................... 5 3.3 Obstacle Limitation Surfaces ..................................................................................................................... 5

4 Flight Operations Analysis ................................................................................................... 8

4.1 Instrument Flight Procedures................................................................................................................... 8 4.2 Minimum Sector Altitude .......................................................................................................................... 10 4.3 Instrument Landing System Flight Inspection ............................................................................... 11 4.4 Aviation Obstruction Lighting ................................................................................................................ 12

5 References ............................................................................................................................... 13

Table of Figures

Figure 1 Indicative Silverbirch Wind Farm Layout ............................................................................................... 3 Figure 2 Silverbirch in Relation to Kerry Airport Obstacle Limitation Surfaces ..................................... 7 Figure 3 Silverbirch in Relation to Kerry Airport CRK1A (Cat A, B) Departure Routing (not to scale) ............................................................................................................................................................................................ 9 Figure 4 Silverbirch in Relation to Kerry Airport NDB MSA (not to scale) .............................................. 11

Table of Tables

Table 1 Silverbirch Wind Farm Coordinates ............................................................................................................ 4 Table 2 Kerry Airport Obstacle Limitation Surfaces ............................................................................................. 6 Table 3 Table of References ............................................................................................................................................ 13


Silverbirch Wind Farm | Introduction

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1 Introduction

This Section provides an introduction to the assessment, and discusses the generic effects of turbines on aviation systems in addition to the scope and methodology.

1.1 General

Silverbirch Renewables Ltd (Silverbirch) is proposing the development of the Silverbirch Wind Farm. The development is expected to consist of fourteen wind turbines of a maximum blade tip height of 150 metres (m) above ground level (agl). The development site is located in County Kerry, between 3 and 5 kilometres (km) southwest of Ballydesmond.

Silverbirch has instructed Osprey Consulting Services Ltd (Osprey) to undertake an assessment of the potential for the development to affect aviation, including any impacts on operations of Kerry Airport.

1.2 Background

The effects of wind turbines on aviation interests have been widely publicised but the primary concern is one of safety. While there can be a number of potential impacts, there are typically two dominant scenarios that lead to objection from aviation stakeholders:

1. Physical Obstruction: Turbines can present a physical obstruction at or close to an aerodrome; and

2. Radar/Air Traffic Services: Turbine clutter appearing on radar display can affect the safe provision of air traffic services as it can mask unidentified aircraft from the air traffic controller and/or prevent him from accurately identifying aircraft under his control. In some cases, radar reflections from the turbines can affect the performance of the radar system itself.

1.3 Purpose and Scope

The purpose of this Aviation Impact Assessment (AIA) is to identify any effects of the proposed Wind Farm, which could potentially present a physical obstruction to aviation, including aviation operations at Kerry Airport. Osprey uses a number of resources, including IAA Aeronautical Charts and the Irish Integrated Aeronautical Information Package (IIAIP) [Reference 1], and begins with the consultation zones for various airfield types in accordance with the IAA guidance documents Aerodrome Licensing Manual [Reference 2] and Licensing Requirements for Private Aerodromes [Reference 3].

This AIA considers the impact of the wind turbines once they are fully installed and operational. Osprey recommends that the Developer consider the following


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information when assessing the safety of any installation, construction or decommissioning phases with respect to aviation interests.

Tall slender constructions such as wind turbines, despite their size, can be difficult to see from the air in certain weather conditions. The IAA, through Statutory Instrument (SI) publications has issued guidance: S.I 215 Obstacles to Aircraft in Flight [Reference 4] and S.I 423 En-route Obstacles to Air Navigation [Reference 5], which recommends that to facilitate safe visual flight, day or night, in the vicinity of obstacles:

Appropriate information about the construction and any associated lighting (where applicable) should be promulgated in the IAA IAIP [Reference 1] and applicable aviation publications, with notification at least 30 days prior to obstacle construction.

o Data should include location, height, date of erection, date of removal and lighting type (none, infra-red or lighting brightness); and

o Local aerodromes identified during consultation (typically with a 10 km radius) should be notified, particularly any police helicopter or air ambulance unit.


Silverbirch Wind Farm | Silverbirch Wind Farm

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2 Silverbirch Wind Farm

This Section provides the Silverbirch Wind Farm parameters.

2.1 Overview

The Silverbirch Wind Farm is proposed to consist of fourteen wind turbine generators split into three distinct wind farm elements. Figure 1 provides an indicative layout of the complete Wind Farm.

Courtesy of Silverbirch Renewables Ltd Image © 2015 Google, Digital Globe

Figure 1 Indicative Silverbirch Wind Farm Layout


Silverbirch Wind Farm | Silverbirch Wind Farm

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Table 1 provides the Latitude, Longitude and Above Ordnance Datum (AOD) of the individual proposed turbine locations.

Turbine Reference Latitude/Longitude AOD (m)

1 N52°08’14.81’’ W009°15’42.24’’ 200

2 N52°08’14.81’’ W009°15’42.24’’ 221

3 N52°08’ 04.52’’ W009°16’01.95’’ 232

4 N52°08’18.10’’ W009°16’25.06’’ 230

5 N52°08’49.01’’ W009°17’26.81’’ 219

6 N52°08’49.04’’ W009°17’27.32’’ 230

7 N52°09’05.59’’ W009°17’32.42’’ 245

8 N52°10’00.00’’ W009°16’26.81’’ 231

9 N52°10’13.52’’ W009°16’40.51’’ 240

10 N52°10’42.21’’ W009°15’51.75’’ 254

11 N52°10’30.35’’ W009°15’23.74’’ 249

12 N52°10’39.02’’ W009°15’01.63’’ 238

13 N52°10’29.03’’ W009°14’48.94’’ 220

14 N52°10’18.38’’ W009°15’05.48’’ 235

Table 1 Silverbirch Wind Farm Coordinates


Silverbirch Wind Farm | Kerry Airport Obstacle Limitation Surfaces Analysis

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3 Kerry Airport Obstacle Limitation Surfaces Analysis

This Section analyses the potential for the development to breach the established Obstacle Limitation Surfaces at the Airport.

3.1 Kerry Airport

Kerry Airport, incorporated as a public limited company in July 1968, is located near Farranfore, Killarney, County Kerry. Passenger services operations at the Airport include Stobart Air for Aer Lingus Regional, and Ryanair.

Kerry Airport is a licenced aerodrome with a main runway length of 2,000 m and orientation of 08/26. The Airport is located within its surrounding Control Zone (CTR) of radius 10 nautical miles (NM) centred on the Kerry Airport Aerodrome Reference Point (ARP) with a vertical extent of 5,000 feet (ft) above mean sea level (amsl). The CTR is designated as Class C Controlled Airspace (CAS) and is established to provide protection to aircraft operating into and out of the Airport; however, outside of the Airports operating hours, the airspace reverts to Class G uncontrolled airspace.

3.2 Obstacle Limitation Surfaces Overview

The proposed Wind Farm is in proximity to the Obstacle Limitation Surfaces (OLS) established at Kerry Airport and as such, Osprey has completed an analysis in regard to the OLS applicable to the Airport, to ascertain whether the proposed turbines would be within the lateral confines of, and present a breach of the OLS.

Obstacles inside and outside an aerodrome boundary can affect flight operations, including take-off and landing, and procedures designed to facilitate these activities at an aerodrome. Regulatory guidance states that certain areas of local airspace close to an airport are defined to assess the significance of existing or proposed obstacles in the vicinity of an aerodrome; these are OLS. The OLS are determined according to the classification of the aerodrome and its runway length. The IAA issues regulatory guidance on how aerodromes should manage operations in relation to obstacles and the licensing of an aerodrome depends on the extent to which these areas are free from current or new obstacles. The guidance is contained within Reference 2.

3.3 Obstacle Limitation Surfaces

Aerodromes are required to define a number of complex OLS that are particular in most cases to the main runway, its length and intended use. The safeguarded areas are represented by a number of 2-D planes and 3-D shapes around the airport, which describe the limits of any obstacles in the aerodrome vicinity. The absence of



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obstacles within these areas contributes to the safety of both visual and instrument based flight operations in the vicinity of the airport.

The dimensions of the OLS at any aerodrome are determined by the aerodrome reference code. This code is determined by the IAA in consultation with the aerodrome and is made up of two elements: a code number and a code letter. In calculating dimensions of the OLS, the code number is of primary concern.

The aerodrome reference code is assigned based on the Take-Off Distance Available (TODA) and Accelerate Stop Distance Available (ASDA) of the aerodrome’s longest runway, as detailed in the IAA Aerodrome Licensing Manual [Reference 2]. For runways 26/08 with a TODA of 2,060 m, the assumed aerodrome reference code at Kerry Airport is a code of 4 (instrument). The lateral constraints for the Code 4 runway at the airport are provided in Table 2.

OLS Lateral Extension (m) Measurement Point

Take-Off Climb Surfaces (TOCS)

15,000 Clearway or 60 m from end of take-off run

Approach Surfaces 15,000 60 m before threshold

Inner Horizontal Surface 4,000 Runway Strip-ends

Conical Surface 2,100 Inner Horizontal Surface Outer Edge

Outer Horizontal Surface 15,000 Aerodrome Reference Point

Table 2 Kerry Airport Obstacle Limitation Surfaces

The proposed Wind Farm, at its closest point, is located at a distance of 16.15 km from the Kerry Airport ARP (Turbine 7). The relative location of the Wind Farm to the established Kerry Airport OLS is shown below in Figure 2.



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Image © 2016 Google, Digital Globe

Figure 2 Silverbirch in Relation to Kerry Airport Obstacle Limitation Surfaces

Figure 2 indicates that the Wind Farm is outside of the lateral confines of, and will therefore not breach the Outer Horizontal Surface at Kerry Airport. The figure also indicates the location of the development in relation to the lateral confines of the Approach and Take-off Climb Surfaces at the Airport also showing that these OLS will not be affected.


Silverbirch Wind Farm | Flight Operations Analysis

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4 Flight Operations Analysis

This section provides analysis and conclusions regarding the potential for the development to affect flight operations at Kerry Airport.

4.1 Instrument Flight Procedures

Instrument Flight Procedures (IFP) are in place at airports to describe the standard routes for aircraft to follow on approach to the airport, allowing aircraft to accurately line up with the runway and descend safely. Furthermore, separate IFPs are designed to allow aircraft to depart the airport on preferential routes that allow them to integrate into the en-route structure.

Obstacles such as wind energy developments can present a physical obstruction to the containment areas for IFPs. The IAA issues regulatory guidance on how aerodromes should manage operations in relation to obstacles and the licensing of an aerodrome depends on the extent to which these areas are free from current or new obstacles. Obstacle clearance is a primary safety consideration in developing IFPs, and because of variable factors such as terrain, aircraft characteristics and pilot ability, the detailed procedures are based on present standard equipment and practices.

Kerry Airport has a responsibility to safeguard their operations to the dimensions detailed in International Civil Aviation Organisation (ICAO) Document 8168 [Reference 6]. This document is an international document that details the criteria for building flight procedures in terms of aircraft and equipment performance, safety performance and obstacle safeguarding. Should the wind farm fall within the IFP obstacle containment areas, alternative procedures would be required.

Kerry Airport has a number of published IFP established for aircraft on departure from and arrival to the airport. The wind farm is located in proximity to the aircraft routing of the following departure procedures these are the only procedures to be potentially affected by the proposed development:

Runway 08 - CRK1A Departure; Runway 08 - CRK1C Departure; Runway 08 – KER1A Departure; and Runway 08 – KER1C Departure.

As an example, Figure 3 below shows an extract from a chart depicting the CRK1A departure procedure that routes aircraft from Runway 08 at Kerry Airport to the southeast toward Cork. The figure shows the approximate location of the Wind Farm.



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© Reproduced by permission of the IAA and OS 2009.

Figure 3 Silverbirch in Relation to Kerry Airport CRK1A (Cat A, B) Departure Routing (not to scale)

The Wind Farm has the potential to fall within the obstacle containment areas of published Kerry Airport IFP. In proximity to the development location, the figure above indicates a point on the CRK1A IFP that aircraft must be at a minimum altitude of 2,300 ft amsl. Such procedures require a minimum obstacle clearance of 1,000 ft and as the maximum blade tip height of the development is reported to be 1,325.5 ft amsl, less than 1,000 ft obstacle clearance exists. Consequently, further analysis may be required to determine the potential for an effect on defined IFP. However, it is noted, with the following detail provided by Silverbirch Renewables Ltd, that another wind farm proposed by Scart Energy Ltd and comprising up to 18 turbines (planning reference numbers 13/114 and 13/725), has already been granted planning permission in the vicinity of the Silverbirch wind farm. This permitted wind farm, which is located to the west-northwest of the Silverbirch wind farm, is located in an area that would also potentially impact on the same four departure procedures. However, the Scart Energy wind farm has turbines with tip heights that are significantly higher than those proposed on the Silverbirch wind farm. The closest



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turbine in the Silverbirch Wind Farm to Kerry Airport is Turbine 7, which is located at 16.15 km from the Kerry Airport Navigation Beacon - it has a proposed tip height of 395 m amsl. The highest turbine in the Silverbirch wind farm is Turbine 10 – it has a proposed tip height of 404 m and is 17.7 km from the Kerry Airport Navigation Beacon. By comparison, Silverbirch Renewables Ltd report that Turbine 4 in the Scart Energy wind farm has a tip height of 440 m amsl and is 14.9 km from the airport. Given that all turbines in the Silverbirch wind farm have lower tip heights than the Scart Energy wind farm development, it is therefore assumed that either the Scart Energy development does not affect the IFP, or that any impact created to containment areas of the IFP is mitigated for, or would be operationally managed by the airport.

4.2 Minimum Sector Altitude

The Minimum Sector Altitude (MSA) is the lowest altitude which may be used that will provide a minimum clearance of 1,000 ft above all objects located in the area contained within a sector of a circle of 46 km (25 NM) radius centred on a radio aid to navigation. The MSA is not constant in every direction and many sectors are created in order to set appropriate altitudes in all directions surrounding the facility.

Kerry Airport has a number of IFP established which allow aircraft operating under Instrument Flight Rules (IFR) to use the Airport in poor weather conditions without the provision of support from radar.

The Wind Farm is well within 25 NM from the Non-Directional Beacon (NDB) navigation facility at Kerry Airport. The Wind Farm straddles two MSA sectors of this facility; the lowest altitude of the two is 2,700 ft above mean sea level (amsl).

The maximum anticipated blade tip height within the Wind Farm is no higher than 1,325.5 ft (404 m) (amsl); consequently, there is over 1,000 ft between the highest point of the proposed development and the MSA altitude. Therefore, the proposed development will not affect the established Kerry Airport MSA relating to the NDB. Figure 4 provides a diagrammatical representation of the approximate location of the Wind Farm in relation to the NDB MSA at Kerry Airport.



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Figure 4 Silverbirch in Relation to Kerry Airport NDB MSA (not to scale)

4.3 Instrument Landing System Flight Inspection

Whilst aircraft approaching the Airport utilising the Instrument Landing System (ILS) procedure on approach to Kerry Airport Runway 26 from the east will be unaffected; analysis is required to establish whether the Wind Farm could affect the annual calibration checks carried out on the ILS equipment itself.

An ILS is a ground based navigational system that provides precision guidance signals to aircraft in the last stages of approach and landing. For this purpose, the equipment needs a high level of integrity, accuracy and reliability; regulations require that regular flight inspections of the equipment are carried out to ensure it is working correctly.

The internationally agreed specification for ILS is contained in ICAO Annex 10 Volume 1 [Reference 7]. The standard methods of verifying the ILS coverage are detailed with ICAO Document 8071 [Reference 8]. The process must be carried out by a suitably equipped and authorised Flight Inspection aircraft and crew.

Part of the flight inspection process for ILS systems includes serials whereby the inspecting aircraft transits a course perpendicular to the actual runway approach centreline, therefore crossing the centreline at a specific range from the Airport.

It should be noted that the neighbouring Cordal Wind Farm that is currently under construction, is located on the extended centreline of the approach at approximately 10 NM from Runway 26 at Kerry Airport. This Wind Farm is on considerably higher ground than the proposed Silverbirch site, with the highest Cordal turbine being on land of approximately 421.5 m amsl. As stated in Table 1, the highest turbine from the proposed site would be on land of 254 m amsl (Turbine 10). Since the flight inspection aircraft would be operating at a suitable altitude to ensure appropriate vertical separation above the Cordal Wind Farm, it would therefore be operating at



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an altitude that would ensure even greater vertical separation from the proposed Silverbirch Wind Farm.

Due to the requirement to operate at an altitude to ensure appropriate vertical separation from the Cordal Wind Farm located on significantly higher ground, the proposed Wind Farm will not have an impact on flight inspection operations for the ILS on Runway 26 at Kerry Airport.

4.4 Aviation Obstruction Lighting

The proposed development may be considered as an en-route obstacle and therefore the IAA may require the marking and/or lighting of any obstacle in the interest of aviation safety. Specifically, for obstacles outside the aerodrome boundary, the responsibility rests with the IAA and the owners of the structures [Reference 9]. Subject to consultation with the IAA, Silverbirch intend to implement appropriate aviation obstruction lighting to the development.


Silverbirch Wind Farm | References

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5 References

Reference Name Origin

1 Irish Integrated Aeronautical Information Package (IIAIP)

Effective Date – 10th December 2015

Irish Aviation Authority

2 Aerodrome Licensing Manual – Number 002

Dated January 2014


3 Licensing Requirements for Private Aerodromes

Dated February 2014


4 Statutory Instrument 215: Obstacles to Aircraft in Flight Order, 2005


5 Statutory Instrument 423: En-route Obstacles to Air Navigation Order, 1999


6 ICAO Document 8168: Aircraft Operations Volume II Construction of Visual and Instrument Flight Procedures

Fifth Edition - 2006

International Civil Aviation Authority

7 ICAO Annex 10 Aeronautical Telecommunications Volume 1: Radio Navigation Aids

Sixth Edition July 2006


8 ICAO Document 8071: Manual on Testing of Radio Navigation Aids

Fourth Edition - 2000


9 IAA Policy: Land Use Planning and Offshore Development Version 1

Dated 10th December 2014


Table 3 Table of References

Documents

Silverbirch Wind Farmsilverbirchwindfarm.com/.../04/Appendix-11-A-Osprey-Aviation-Impact... · aviation, including aviation operations at Kerry Airport. Osprey uses a number of resources,