Costing the CSGN
Total Page:16
File Type:pdf, Size:1020Kb
Costing the CSGN Capital cost estimates for the major components of the CSGN Central Scotland Green Network Trust and the GCV Green Network Partnership November 2014 This study should be cited as: Hislop, M and Corbett, A. 2014, ‘Costing the CSGN – Capital cost estimates for the major components of the CSGN’, The CSGN Trust and the GCV Green Network Partnership. Additional reports available: Hislop, M. 2016, ‘Resourcing the CSGN – Potential sources of funding for the capital costs of the CSGN’, GCV Green Network Partnership for CSGNT Hume, J. 2015, ‘CSGN Benefits Valuation Report’, Scottish Government Table of Contents 1 Executive Summary ......................................................................................................... 1 2 Acknowledgements .......................................................................................................... 3 3 Introduction and Background ........................................................................................... 5 3.1 The client .................................................................................................................. 5 3.2 Purpose of the report ................................................................................................ 5 3.3 The authors .............................................................................................................. 5 3.4 Background .............................................................................................................. 5 4 Methodology .................................................................................................................... 7 4.1 The components of the CSGN ................................................................................. 7 4.2 Basic approach to costing the components .............................................................. 8 4.3 Assessment of Confidence in the capital cost estimates .......................................... 9 4.4 Assessment of the potential for double-counting ...................................................... 9 4.5 What is not taken into consideration in this study ..................................................... 9 5 Greenspace ................................................................................................................... 11 5.1 What is ‘Greenspace’? ........................................................................................... 11 5.2 Greenspace in the CSGN activity area ................................................................... 12 5.3 Relevance of Greenspace to the CSGN ................................................................. 12 5.4 CSGN components for Greenspace ....................................................................... 13 5.5 C1. Create greenspace in existing urban areas ..................................................... 14 5.6 C2. Enhance existing greenspace ......................................................................... 17 5.7 C3. Create greenspace in new residential areas .................................................... 22 6 Green Infrastructure ....................................................................................................... 28 6.1 What is ‘Green Infrastructure’? ............................................................................... 28 6.2 Green Infrastructure in the CSGN activity area ...................................................... 28 6.3 Relevance of Green Infrastructure to the CSGN .................................................... 29 6.4 CSGN components for Green Infrastructure .......................................................... 29 6.5 C4: Deliver Green Infrastructure into new residential developments...................... 29 6.6 C5: Deliver Green Infrastructure in new commercial and industrial developments 34 6.7 C6: Retrofit Green Infrastructure into existing urban areas .................................... 36 7 Vacant and Derelict Land .............................................................................................. 40 7.1 Vacant & Derelict Land in the CSGN activity area ................................................. 40 7.2 Relevance of V&DL to the CSGN ........................................................................... 40 7.3 CSGN components for Vacant & Derelict Land ...................................................... 41 7.4 C7: Deliver greenspace on V&DL for social or environmental end use .................. 42 7.5 C8: Deliver temporary greening on V&DL classified as stalled .............................. 45 7.6 C9: Encourage naturalisation of V&DL classified as stalled ................................... 50 8 Community Growing ...................................................................................................... 54 8.1 Community Growing in the CSGN activity area ...................................................... 54 8.2 Relevance of Community Growing to the CSGN .................................................... 54 8.3 CSGN components for Community Growing .......................................................... 55 8.4 C10: Increase the area of allotments by 200% ....................................................... 55 8.5 C11: Increase the area of community orchards by 200% ....................................... 56 8.6 C12: Increase the area of community gardens by 200% ........................................ 60 9 Habitat ........................................................................................................................... 63 9.1 Habitat in the CSGN activity area ........................................................................... 63 9.2 Relevance of Habitat to the CSGN ......................................................................... 63 9.3 CSGN components for Habitat ............................................................................... 64 9.4 C13: Increase the area of woodland by 50% .......................................................... 64 9.5 C14: Create priority grassland, wetland and heathland habitat links ...................... 65 9.6 C15: Enhance existing grassland, wetland and heathland habitat links ................. 69 9.7 C16: Protect and enhance peatland habitats ......................................................... 71 10 Active Travel .............................................................................................................. 75 10.1 What is Active Travel? ............................................................................................ 75 10.2 Active Travel in the CSGN activity area ................................................................. 75 10.3 Relevance of Active Travel to the CSGN ............................................................... 75 10.4 CSGN components for Active Travel ...................................................................... 76 10.5 C17: Deliver a strategic network of active travel routes ........................................ 76 11 Results and Outputs of the study ............................................................................... 81 11.1 A Capital Cost estimate of the major components of the CSGN ............................ 81 11.2 Assessment of the Potential for Double-Counting .................................................. 82 11.3 Outputs from the study ........................................................................................... 84 12 Appendices ................................................................................................................ 85 12.1 Appendix 1 – Underperforming greenspace calculation methodology ................... 87 12.2 Appendix 2 - Site layouts for residential developments used in the study .............. 89 12.3 Appendix 3 – Community Gardens in the CSGN.................................................... 91 12.4 Appendix 4 – Extent of Peatland in the CSGN ....................................................... 95 12.5 Appendix 5 - Costing the implementation of the IHN in the CSGN....................... 103 12.6 Appendix 6 - CSGN strategic routes: estimating the long term costs ................... 114 ‘Costing the CSGN – Capital cost estimates for the major components of the CSGN’ 1 Executive Summary This study has been undertaken by the GCV Green Network Partnership for the Central Scotland Green Network Trust. The study provides an estimate of the total capital cost for the delivery of the CSGN as expressed in the CSGN Vision. The approach taken to deliver this estimate was to breakdown the task of delivering the CSGN into smaller component tasks, then calculate a cost estimate for each components before aggregating the component costs into the final total capital cost estimate. Seventeen components were identified, and for each component the extent of the intervention required to meet the CSGN vision was estimated, along with an estimate of the average unit cost for typical intervention projects. When multiplied together these estimates provide a capital cost estimate for each component. This allows a comparison of relative costs for component parts of the CSGN delivery programme. The study estimates the capital cost to deliver the CSGN vision is in the order of £2.8 billion. With an ambition to deliver the vision by 2050, this means that on average around £80 million per year of resources will need to be focussed on the CSGN capital programme. This study has not attempted to consider other costs associated with the delivery of the CSGN, i.e. revenue costs