RIVER IRWELL CATCHMENT MANAGEMENT PLAN CONSULTATION REPORT !R THREE - RIVER ROCH SUB-CATCHMENT Nation.-1 Authority Inform*
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RIVER IRWELL CATCHMENT MANAGEMENT PLAN CONSULTATION REPORT !R THREE - RIVER ROCH SUB-CATCHMENT Nation.-1 Authority Inform*. Csntf© I Head ! nee I Class N o ..................... Accession No i ------ IRWELL CATCH MENT MANAGEM ENT PLAN CONSULTATION REPORT CHAPTER THREE - RIVER ROCH SUB-CATCHMENT Front Cover photograph : River Roch, Gigg Lane, Bury This report has been produced on recycled paper in line with NRA policy RIVER ROCH CONSULTATION REPORT CONTENTS Section Page No. Index of Maps 9 River Roch Sub-Catchments Details 10 - . 1. INTRODUCTION 1.1 Catchment Description 12 1.2 Hydrology 12 1.3 Hydrometric Network 13 1.4 Hydrogeology 14 1.5 Flood Defence 15 1.6 Water Quality 16 September 1994 2 Invell CMP Chapter Three • Roch Sub-Catchment CONTENTS Page No. 2. CATCHMENT USES AND ACTIVITIES 2.1 Flood Defence 17 2.1.1 General 17 2.1.2 Local Perspective 17 2.1.3 Flood Warning 18 2.1.4 Objectives 18 2.1.5 Environmental Requirements 18 2.2 Development 19 2.2.1 General 19 2.2.2 Local Perspective 19 __ ______ 2.2.3 Local Planning Policy 19 2.2.4 Future Development in the Catchment------ - 20 2.3 Potable (Drinking) W ater Supply 21 2.3.1 General 21 2.3.2 Local Perspective 21 2.3.3 Supply Objectives and Standards 22 2.3.4 Customer Supply Requirements 23 Water Quantity Water Quality Groundwater Quality 2.3.5 Environmental Requirements 23 2.4 Industrial and Agricultural Abstractions 24 2.4.1 General 24 2.4.2 Local Perspective 24 Industrial General Agriculture Spray Irrigation 2.4.3 Supply Objectives and Standards 24 2.4.4 Customer Requirements 25 Water Quantity Water Quality 2.4.5 Environmental Requirements 25 2.5 Resource Usage 26 2.5.1 General 26 2.5.2 Local Perspective 26 Surface Water Groundwater September 1994 Irwell CMP Chapter Three ■Roch Sub-Catchment CONTENTS Page No. 2.6 Fish Fanning 27 2.6.1 General , 27 2.6.2 Local Perspective 27 2.6.3 Objectives and Standards 27 2.6.4 Customer Requirements . 27 Water Quantity 2.7 Effluent Disposal 28 2.7.1 General 28 Continuous Effluents Intermittent Effluents 2.7.2 Local Perspective 28 Continuous Effluents Intermittent Effluents ~ 2.T.3 Environmental Objectives ------- - - ------------------ - _ _ 29 _ 2.7.4 Environmental Requirements 29 Water Quality Water Quantity 2.8 Landfill Sites 30 2.8.1 General 30 2.8.2 Local Perspective 30 2.8.3 Objectives 30 2.8.4 Environmental Requirements 30 Water Quality Water Quantity Physical Features Mineral Extraction 32 2.9.1 General 32 2.9.2 Local Perspective 32 2.9.3 Objectives and Standards 32 2.9.4 Environmental Requirements . 32 Water Quality Water Quantity Physical Features Groundwater Protection 34 2.10.1 General 34 2.10.2 Local Perspective 34 September 1994 4 Irwell CMP Chapter Three - Roch Sub-Catchment CONTENTS Page No. 2.11 Fisheries 36 2.11.1 General 36 2.11.2 Local Perspective 36 2.11.3 Environmental Objectives 36 2.11.4 Environmental Requirements 37 Water Quality Water Quantity Physical Features 2.12 Conservation 38 2.12.1 General 38 2.12.2 Local Perspective 38 2.12.3 Aquatic Invertebrates 40 2.12.4 Environmental Objectives 40 2.12.5 Environmental Requirements------ — - - - -----------------------41 Water Quality Water Quantity Physical Features 2.13 Landscape and Heritage 42 2.13.1 General 42 2.13.2 Local Perspective 42 2.13.3 Environmental Objectives 43 2.13.4 Environmental Requirements 43 Water Quality Water Quantity Physical Features 2.14 Recreation and Amenity 45 2.14.1 General 45 2.14.2 Local Perspective 45 2.14.3 Environmental Objectives 45 2.14.4 Environmental Requirements 45 Water Quality Water Quantity Physical Features 2.15 Angling 47 2.15.1 General 47 2.15.2 Local Perspective 47 2.15.3 Objectives 47 2.15.4 Environmental Requirements 47 Water Quality Water Quantity Physical Features September 1994 5 Irwell CMP Chapter Three - Roch Sub-Catchment CONTENTS Page No. 3. CATCHMENT OBJECTIVES 3.1 Flood Defence Objectives 48 3.1.1 General 48 3.1.2 Objectives 48 3.2 Water Quantity Objectives 49 3.2.1 General 49 3.2.2 Objectives 49 Water Abstraction Surface Waters Local Hydrometric Objectives Groundwaters — - — - 3.3 Water Quality Objectives 51 3.3.1 Water Quality Classification 51 a) Present Water Quality Classification Objectives b) Future Water Quality Classification Objectives 3.3.2 EC Directives 52 a) Directive on Dangerous Substances in Water b) Directive on Urban Wastewater Treatment c) Directive on Water Quality for Freshwater Fish d) Directive on Abstraction of Surface Water for Drinking 3.3.3 Groundwater Protection Objectives 53 3.4 Physical Features Objectives 55 3.4.1 General 55 3.4.2 Objectives 55 Development Control Potable Water Supply, Agricultural and Industrial Abstraction Mineral Extraction and Landfill Sites Fisheries Conservation Landscape and Heritage Recreation and Amenity Angling September 1994 6 Irwell CMP Chapter Three • Roch Sub-Catchment CONTENTS Page No. 4. CURRENT STATE OF THE CATCHMENT 4.1 State of Catchment: Flood Defence 57 4.1.1 General 57 4.1.2 Issues Identified 57 a) Catchment Wide Issues b) Site Specific Issues 4.2 State of the Catchment: Water Quantity 61 4.2.1 General 61 4.2.2 Local Hydrometric Network 61 River Level Recording “ Rainfall'Monitoring------------------—-------- —------------------------- 4.2.3 Issues Identified 62 a) Catchment Wide Issues b) Site Specific Issues 4.3 State of the Catchment: Water Quality 63 4.3.1 Water Quality Classification 63 a) Present Water Quality Classification Objectives b) Future Water Quality Classification Objectives 4.3.2 EC Directives 63 a) Directive on Dangerous Substances in Water b) Directive on Urban Wastewater Treatment c) Directive on Water Quality for Freshwater Fish d) Directive on Abstraction of Surface Water for Drinking 4.3.3 __Issues Identified 64 a) Catchment Wide Issues b) Site Specific Issues 4.4 State of the Catchment : Physical Features 69 4.4.1 General 69 4.4.2 Issues Identified 69 a) Catchment Wide Issues b) Site Specific Issues September 1994 7 IrweU CMP Chapter Three - Roch Sub-Catchment CONTENTS Page No. 5. ISSUES AND OPTIONS 5.1 General 71 5.2 Sub-Catchment Wide Issues 72 5.3 Site Specific Issues 73 September 1994 8 Invell CMP Chapter Three * Roch Sub-Catchment INDEX OF MAPS Map No. Title Facing Page No. 1 Roch Location 10 2 Roch Catchment with Infrastructure 12 3 Hydrometric Network 13 4 Summary Geological Map 14 5 River Network 15 6 Licensed Abstractions: Public Water Supply 21 7 Licensed Abstractions: Industrial & Agricultural 24 8 Fish Farming 28 9 Effluent Disposal 31 10 Landfill Sites 30 11 Fisheries 1 : River Habitat Potential 36 12 Fisheries 2 : Actual Fish Species Present 36 13 Fisheries 3 : Shortfalls in Habitat Potential 36 14 Designated Sites of Conservation Importance 38 15 Landscape and Heritage 42 16 Recreation and Amenity 45 17 Angling 47 18 Flood Defence: River Corridor Land Use Plan 48 19 Flood Defence: Objectives 48 20 Water Quality: Present Classification Objectives 51 21 EC Directive Compliance 52 22 Flood Defence: Flood Risk Areas 57 23 Flood Defence: State of the Catchment 57 24 Flood Defence : Existing Levels of Protection 57 25 Water Quality: State of the Catchment 63 26 Site Specific Location Map 71 September 1994 9 Irwell CMP Chapter Three - Roch Sub-Catchment 46 48 50 52 54 56 58 60 62 64 66 68 70 72 74 76 78 80 82 84 86 90 92 94 96 98 00 02 04 SDiSE 30 30 28 28 ROCH LOCATION 26 26 KEY 24 Irwell catchment boundary 24 Roch Sub-Catchment boundary 22 22 Sub-Catchment boundary 20 Built up area 20 Watercourse f 18 18 Culverted section 16 Canal 16 Irwell Catchment Management Plan 14 14 Roch Sub-Catchment 12 June 1994 Map 1 12 10 NRA 10 National Rivers Authority 08 North West Region 08 06 06 04 04 02 02 SD N SE 00 A 00 SJ SK 98 98 96 96 10 km 94 94 92 92 SJ SK 46 48 50 52 54 56 58 60 62 64 66 68 "72 74 76 78 80 82 84 86 88 90 92 94 96 98 00 02 04 RIVER ROCH SUB-CATCHMENT DETAILS (MAP 1) Area 190 km2 Population 181,000 MAIN TOWNS AND POPULATIONS Rochdale 94,439 Heywood 30,283 Littleborough 11,693 Milnrow 11,304 Shaw 10,309 ADMINISTRATIVE DETAILS District Councils:- Rochdale Metropolitan Borough Council Oldham Metropolitan Borough Council (Part) Bury Metropolitan Borough Council (Part) Rossendale Borough Council (Part) NRA:- North West Region - South Area W ater Companies:- North West Water Ltd. Principal Sewage Treatment Works:- Rochdale TOPOGRAPHY Ground Levels Min. Level 65 mAOD Max. Level 470 mAOD GEOLOGY Solid Geology:- Predominantly Carboniferous Millstone Grit and Coal Measures Superficial Geology:- Variable - Glacial Till (Boulder Clay), Sand and Peat September 1994 10 Invell CMP Chapter Three * Roch Sub-Catchment WATER RESOURCES Availability:- Groundwater - Generally site specific Surface water - Good availability FLOOD PROTECTION Length of Designated Main River:- 102.97 km. (maintained by NRA) Riparian owned debris screens cleaned 7 by the NRA on a best endeavours basis WATER QUALITY Length of River in National Water Council Class 1993 Assessment Class 1A (Very Good) 8.3 km. Class 3 (Poor) 26.6 km. Class IB (Good) 8.5 km. Class 4 (Bad) 1.0 km. Class 2 (Fair) 40.6 km FISHERIES Length of salmonid fishery:- 17 km. cyprinid fishery:- 1.5 km. CONSERVATION Number of Sites of Special Scientific Interest (SSSI) in the catchment 0 Number of SSSI's which are associated with the River Corridor and/or wetland habitats 0 Number of Site of Biological Importance (SBI) in the catchment 34 Number of SBI's associated with River Corridor and/or wetland habitats 30 September 1994 1 1 Irwell CMP Chapter Three - Roch Sub-Catchment .