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soil association, including the comprising soil series characteristics. The full NSRI Site Soil Report can be viewed in Annex D3 of the ES. Table 3.1 Soil Association Characteristics Hafren Brickfield 1 Wilcocks 2 Description Loamy permeable upland soils over rock, with a wet peaty surface horizon and bleached subsurface horizon, often with thin ironpan. May include some peat on higher ground. Rock and scree locally. Comprising Soil Series Soil parent material Hafren (45%) – loamy material of lithoskeletal mudstone and sandstone or slate. Hiraethog (20%) – loamy material over lithoskeletal mudstone and sandstone or slate. Wilcocks (10%) – loamy drift with siliceous stones. Other (25%) – other minor soils. Palaeozoic slaty mudstone and siltstone. Source: National Soil Resources Institute (2009) Slowly permeable seasonally waterlogged fine loamy and fine silty soils, some with wet peaty surface horizons. Brickfield (30%) – medium loamy drift with siliceous stones. Wilcocks (25%) – loamy drift with siliceous stones. Greyland (10%) – medium loamy over clayey drift with siliceous stones. Cegin (10%) – medium silty drift with siliceous stones. Other (20%) – other minor soils. Drift from Palaeozoic slaty mudstone and siltstone. Slowly permeable, seasonally waterlogged loamy upland soils with a peaty surface horizon. Some very acid peat soils. Wilcocks (50%) – loamy drift with siliceous stones. Crowdy (15%) – humified peat, up to 1m in thickness. Winter Hill (15%) – mixed eriophorum and sphagnum peat, up to 1.2m in thickness. Hafren (10%) - loamy material of lithoskeletal mudstone and sandstone or slate. Other (10%) – other minor soils. Drift from Palaeozoic sandstone, mudstone and shale. Figures 3.1 to 3.3 below show the profiles of the component soil series for each of the above soil associations. Figures 3.1 and 3.2 show that the soil series comprising the Hafren and Brickfield 1 soil associations are characterised by shallow (10cm to 20cm) surface peaty horizons, beneath which are layers of clay or sandy silt loam. Figure 3.3 shows that two of the Wilcocks 2 comprising soil series (Wilcocks and Hafren) are also characterised by shallow (10cm to 20cm) surface peaty horizons, again with clay loam or sandy clay loam horizons beneath. The Crowdy and Winter Hill horizons, however, are characterised by deep peat horizons, 100cm to 120cm thick. The Crowdy soil series comprises dark brown or black stoneless, humified peat with a massive structure. The Winter Hill soil series comprises dark reddish brown or dark reddish grey semi-fibrous, Eriophorum-Sphagnum peat, with a moderate to weak coarse platy structure in the top 70cm and a massive structure in the ENVIRONMENTAL RESOURCES MANAGEMENT RWE NPOWER RENEWABLES LTD 7
lower horizon. From these soil series profiles, it can be seen that the Wilcocks 2 soil association is the only one which includes soil series with an important peat element (ie the Crowdy and Winter Hill soil series). It is therefore considered likely that only those parts of the development area which are located within the Wilcocks 2 soil distribution may contain significant peat deposits. Cross reference of the NSRI soil distributions with BGS map data shows good correlation of BGS peat deposits within the Wilcocks 2 soil association, with almost all BGS peat deposits located within the Wilcocks 2 soil association. The only exception to this is an area of peat in a small valley depression approximately 175m to the south east of Turbine 2, located within the Hafren soil association. Figure 3.1 Hafren Comprising Soil Series Profiles Source: National Soil Resources Institute (2009) Full Soils Site Report for location 301000E, 356500N, 5km x 5km, National Soil Resources Institute, Cranfield University. Accessed via https://www.landis.org.uk/sitereporter/. ENVIRONMENTAL RESOURCES MANAGEMENT RWE NPOWER RENEWABLES LTD 8
Page 1 and 2: Annex F Geology and Hydrology • F
Page 3 and 4: F1 WATER RESOURCES AND FLOODING - L
Page 5 and 6: After the GQA has been conducted, a
Page 7 and 8: Protection Zones (SPZs) across Engl
Page 9 and 10: F1.13 CLWYD STRUCTURE PLAN SECOND A
Page 11 and 12: CONTENTS 1 INTRODUCTION 1 2 ASSESSM
Page 13 and 14: 2 ASSESSMENT METHODOLOGY 2.1 INTROD
Page 15 and 16: • Each peat probing location was
Page 17: 3 RESULTS 3.1 DESK STUDY RESULTS 3.
Page 21 and 22: Figure 3.3 Wilcocks 2 Comprising So
Page 23 and 24: y their peat-forming vegetation). I
Page 25 and 26: Table 3.2 Peat survey results at pr
Page 27 and 28: BGS superfiical Phase 1 Turbine NSR
Page 29 and 30: BGS superfiical deposits and underl
Page 31 and 32: Table 3.3 Existing and new access t
Page 33 and 34: 3.2.4 Peat Loss Calculations Direct
Page 35 and 36: Infrastructure component Access tra
Page 37 and 38: 4 RECOMMENDED MITIGATION MEASURES 4
Page 39 and 40: Appendix 1 CCW Consultation
Page 41 and 42: CCW are of the view that the impact
Page 43 and 44: Undertaking'. Within this document
Page 45 and 46: Section 42 and LBAP Species/Habitat
Page 47 and 48: We recommend the inclusion of detai
Page 49 and 50: APPENDIX 1: EUROPEAN PROTECTED SPEC
Page 51 and 52: CADEIRYDD/CHAIRMAN: JOHN LLOYD JONE
Page 53 and 54: Peat depth Peat depth is some refec
Page 55 and 56: Annexe 1: 1.1 Overview (limited ext
Page 57 and 58: Yours sincerely Name Title Enc cc.
Page 59 and 60: It would be useful to define what i
Page 61 and 62: • If peat is identified through d
Page 63 and 64: 1 PHOTOLOG OF SURVEY LOCATIONS Figu
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Page 67 and 68: Figure 1.9 Track past Turbine 7 Fig
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Figure 1.13 Turbine 11 - Dense fore
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Figure 1.17 Turbine 13 Figure 1.18
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Figure 1.21 Turbine 19 Figure 1.22
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Figure 1.25 Track past Turbine 25 F
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Appendix 3 Detailed Results Figures
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KEY: 0.15m 0.08m 0.2m 0.28m 0.18m 0
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KEY: Development Area Turbine Sampl
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KEY: TURBINE 4 Development Area Tur
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KEY: Development Area Turbine Sampl
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KEY: TURBINE 22 Development Area Tu
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KEY: TURBINE 26 Development Area Tu
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KEY: 0.2 0.12 Development Area Turb
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Annex F4 Flood Consequences Assessm
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Flood Consequences Assessment - Clo
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Contents Executive Summary ........
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1 Introduction 1.1 Objectives Walli
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Runoff rates under 100-year storm t
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2 Description of the Site 2.1 Backg
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Steep channel with forest debris cl
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Figure 3 Location of proposed turbi
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2.4 Catchment Delineation An assess
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Outfall grid reference Total catchm
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Tests were attempted at two sites w
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The long term impacts on the surfac
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4 Flood Consequences Assessment 4.1
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4.3 Current Flood Risk In summary,
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Analyses are not presented for the
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WRAP fractional extents of 0.75 WRA
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5.3 Calculation of Existing Greenfi
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Afon Alwen No. 3 Afon Alwen No. 4 R
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1. Do nothing - on the grounds that
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5.6 Construction Appropriate method
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On the basis of a literature review
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Robinson, M. and Dupeyrat, A. 2005.
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Clocaenog Methodology and reasons f
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Clocaenog Methodology for mineral s
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Clocaenog Methodology for mineral s
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1.1 OVERVIEW CLOCEANOG WIND FARM BO
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Table1.1 Forest and Water Guideline
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Table 1.2 Borrow pit search areas S
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Table 1.3 Recommended borrow pit lo
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Name Easting Northing Search Area N
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360000 .000000 359000 .000000 35800
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