F. Geology & Hydrology ( PDF | 31.0 MB ) - RWE.com

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Turbine NSRI Soil BGS superfiical deposits and Number Association underlying bedrock Topography 7 Wilcocks 2 Glacial till over Slopes gently NW Nantglyn Flags to nearest mudstone and siltstone watercourse, 60m NW. 8 Hafren Glacial till over Nantglyn Flags mudstone and siltstone 9 Wilcocks 2 No superficial deposits. Lower Nantglyn Flags Group mudstone. Peat deposit to E. 10 Hafren/ Wilcocks 2 Glacial till over Nantglyn Flags mudstone and siltstone 11 Wilcocks 2 Peat and glacial till over Nantglyn Flags mudstone and siltstone 12 Wilcocks 2 Glacial till over Nantglyn Flags mudstone and siltstone 13 Wilcocks 2 Glacial till over Nantglyn Flags mudstone and siltstone Slopes gently E towards track. Nearest watercourse 275m S Slopes gently to velley bottom SW, nearest watercourse 275m SW. Slopes gently N towards watercourse, 60m NW Fairly flat, slopes very gently to NE. Nearest watercourse 80m north, although a thin (40 - 50m) riparian strip crosses survey area in SW/NE direction. Slopes steeply SE. Nearest watercourse 235m SW. Slopes SE. nearest watercourse 120m SE of turbine centre Phase 1 Habitat Survey Coniferous plantation Coniferous plantation Forestry crop Sitka spruce Sitka spruce Heathland Sitka spruce Coniferous plantation Coniferous plantation Coniferous plantation Coniferous plantation Sitka spruce Sitka spruce. Open area/ riparian zone Sitka spruce Sitka spruce Plant Field Survey Peat year Completed present Results 1956 Yes. Access No Survey confirms no peat at turbine location or restricted in NW crane hardstanding. Small, shallow peat corner due to dense deposits present towards north and west in forestry. valley bottom surrounding the watercourse. See Figure 3.11 in Appendix 3 for exact location of identified peat. 1972 Yes No BGS/NSRI map data and peat depth survey confirm no peat within 50m of turbine. See Figure 3.12 in Appendix 3. 2007 Yes No BGS/NSRI map data and peat depth survey confirm no peat within 50m of turbine. BGS mapped peat deposit approximately 55m east of turbine does not extend into turbine micrositing zone. See Figure 3.13 in Appendix 3. 1998 No - not accessible Desk study suggests no peat BGS/NSRI map data suggest no peat 1998 Yes. Access restricted due to dense forestry. 1997 No - not accessible Desk study suggests no peat Yes Limited access to survey area due to dense forestry. Measurements taken confirm presence of peat up to 1.27m to W of original turbine location. As a result, turbine has been relocated as far as possible E, but still located on the edge of shallow peat. See Figure 3.14 in Appendix 3 for detailed peat survey results. BGS/NSRI map data suggest no peat 1970 Yes No BGS/NSRI map data and peat depth survey confirm no peat within 50m of turbine. Peat depths up to 0.7m recorded along southern edge of survey area, in flat and waterlogged collection area for nearby watercourse. See Figure 3.15 in Appendix 3.
BGS superfiical Phase 1 Turbine NSRI Soil deposits and Habitat Forestry Plant Field Survey Peat Number Association underlying bedrock Topography Survey crop year Completed present Results 14 Wilcocks 2 Glacial till over Slopes gently Coniferous Sitka 1990 No - not accessible Desk study BGS/NSRI map data suggest no peat Nantglyn Flags towards S, nearest plantation spruce suggests mudstone and siltstone watercourse 60m SW no peat 15 Hafren No superficial Slopes NE, nearest Coniferous Sitka 1995 No - not accessible Desk study BGS/NSRI map data suggest no peat deposits. Nantglyn watercourse 190m plantation spruce suggests Flags mudstone and siltstone bedrock. NE no peat 16 Hafren No superficial Slopes gently NE, Coniferous Sitka 1990 No - not accessible Desk study BGS/NSRI map data suggest no peat deposits. Nantglyn nearest plantation spruce suggests Flags mudstone and watercourse 345m no peat siltstone bedrock. N 17 Hafren Glacial till over Slopes NE. Coniferous Sitka 2000 No - not accessible Desk study BGS/NSRI map data suggest no peat Nantglyn Flags Nearest plantation spruce suggests mudstone and siltstone watercourse 155m NW. no peat 18 Hafren No superficial Slopes E. Nearest Coniferous Sitka 1990 No - not accessible Desk study BGS/NSRI map data suggest no peat deposits. Nantglyn watercourse 700m plantation spruce suggests Flags mudstone and siltstone bedrock. S no peat 19 Hafren No superficial Slopes gently Coniferous SS/NS 2002 Yes. No access to Yes Area SW of turbine location surveyed as no deposits, but peat southwards plantation turbine location itself. access to turbine itself. Peat depth up to 2.2m deposit 60m S of towards the Area 150m SW found in area marked on BGS map. Peat found turbine centre. nearest surveyed to confirm to extend further NW than edge of BGS marked watercourse 180m presence and extent deposit, approx 100m further extent, although S of BGS peat deposit. be<strong>com</strong>es progressively shallower with distance from BGS marked deposit (see Figure 3.16 in Appendix 3). Considered likely that peat deposits in the turbine area may also extend beyond the BGS marked deposits to the south. 20 Hafren No superficial Slopes SE, nearest Coniferous Sitka 1994 No - not accessible Desk study BGS/NSRI map data suggest no peat deposits. Nantglyn watercourse 400m plantation/h spruce suggests Flags mudstone and siltstone bedrock. SE eathland no peat 21 Hafren No superficial Slopes SE, nearest Coniferous SS/NS 1994 No - not accessible Desk study BGS/NSRI map data suggest no peat deposits. Denbigh grits watercourse 500m plantation suggests mudstone, siltstone and sandstone SE no peat
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 and 18: 3 RESULTS 3.1 DESK STUDY RESULTS 3.
Page 19 and 20: lower horizon. From these soil seri
Page 21 and 22: Figure 3.3 Wilcocks 2 Comprising So
Page 23 and 24: y their peat-forming vegetation). I
Page 25: Table 3.2 Peat survey results at pr
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
Page 65 and 66: Figure 1.5 Turbine 4 Figure 1.6 Tra
Page 67 and 68: Figure 1.9 Track past Turbine 7 Fig
Page 69 and 70: Figure 1.13 Turbine 11 - Dense fore
Page 71 and 72: Figure 1.17 Turbine 13 Figure 1.18
Page 73 and 74: Figure 1.21 Turbine 19 Figure 1.22
Page 75 and 76: 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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National Soil Resources Institute S
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National Soil Resources Institute A
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National Soil Resources Institute W
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National Soil Resources Institute 1
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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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