Hertfordshire Minerals Planning Local Aggregate Assessment 2014 Local Aggregate Assessment (November 2014) 1 CONTENTS 1. Introduction 2. Geology of Hertfordshire Sand and Gravel Chalk Clay Hard rock Marine aggregates 3. Sand and Gravel Sales Extraction sites Apportionments Local approach to determining apportionment figures Landbank of permitted mineral reserves Timeline for mineral planning Imports and exports Sales and consumption Rail aggregate depots Brick Clay Chalk 4. Recycled and Secondary Aggregate 5. Future aggregate supply and demand Supply Demand 6. Conclusion 3 3 4 5 6 6 6 6 8 10 11 12 13 14 17 17 19 20 20 24 24 25 27 LIST OF TABLES Table 1: Table 2: Table 3: Table 4: Table 5: Table 6: Table 7: Sand and gravel sales compared with permitted reserves in Hertfordshire since 2007 Permitted sand and gravel extraction in Hertfordshire with reserves Landbanks for sand and gravel in Hertfordshire in 2011 Hertfordshire’s primary aggregates imports and exports (2009) Sales and consumption in 2009 Permitted chalk extraction sites in Hertfordshire Provision of sand and gravel in Hertfordshire to 2027 LIST OF FIGURES Figure 1: Figure 2: Figure 3: Figure 4: Figure 5: Figure 6: 2 Geological map of the main mineral resources of Hertfordshire Sales of sand and gravel in Hertfordshire 2003-2012 Geology of Hertfordshire with permitted sand and gravel sites Comparison of Hertfordshire’s total sand and gravel sales 20032012 and apportionment levels Hertfordshire’s rail aggregate depots Location of permitted sites in Hertfordshire for the production of recycled/secondary aggregates Local Aggregate Assessment (November 2013) 1. INTRODUCTION 1.1 The Government recognises the importance of minerals to support sustainable economic growth and our quality of life. They are a finite resource and can only be worked where they are found. The National Planning Policy Framework (NPPF) (March 2012) paragraph 145 requires Minerals Planning Authorities to monitor aggregate production and plan for a steady and adequate supply of aggregates. 1.2 This document has been prepared to fulfil the requirement introduced within the NPPF to produce an annual Local Aggregate Assessment (LAA). It has been prepared in line with guidance within the National Planning Policy Guidance (NPPG). 1.3 The purpose of the LAA is to assess the current local mineral provision against the requirements detailed in the NPPF and NPPG, including the Government’s Guidance on Managed Aggregate Supply System which has now been incorporated into the NPPG. The document details performance in line with the East of England Aggregates Working Party. It also reviews guidance from the government’s Department for Communities and Local Government relating to the NPPF. The county council will update this document on an annual basis and will use its contents to inform the review of Hertfordshire’s Minerals Local Plan. 1.5 This LAA details the current supply and demand in Hertfordshire, from which information relating to existing sites, reserves and aggregate apportionment levels to 2031 (plan period for the new Minerals Local Plan), based on the agreed East of England apportionment figure and rolling average of ten years sales data and other relevant local information, is included within this document. Other potential sources of aggregates are included, namely recycled and secondary aggregates, imports and exports. 2. GEOLOGY OF HERTFORDSHIRE 2.1 The main mineral resources in Hertfordshire are sand and gravel with smaller deposits of chalk and brick clay (as shown in Figure 1). 2.2 The geology of Hertfordshire is largely Chalk of the Cretaceous period, overlain in the south and east by London Clay. In the far north and northwest of the county are small areas of Gault Clay. Throughout much of the county, the superficial deposits which overlay the solid geology complicate the picture. These include the Clay-with-flints of much of west Hertfordshire; including the Chilterns dip slope; the boulder clay of central and east Hertfordshire; and the gravels of the Vale of St Albans and the river valleys.1 2.3 Sand, gravel, crushed rock, chalk and clay all provide the construction industry with the raw materials required for constructing and maintaining roads, buildings and other infrastructure. Minerals are also essential elements in the production of a variety of other products. An adequate and steady supply of minerals is essential if current standards of living are to be 1 Biodiversity Action Plan for Hertfordshire 2006, www.hef.org.uk Local Aggregate Assessment (November 2014) 3 maintained in society as well as meeting basic needs for quality of life, such as shelter. Figure 1: Geological map of the main mineral resources of Hertfordshire 2 © Crown copyright and database rights 2014 Ordnance Survey 100019606 Reproduced with the permission of the British Geological Survey ©NERC. All rights Reserved Sand and Gravel 2.4 Sand and gravel resources occur in Hertfordshire within superficial or ‘drift’ deposits, subdivided into fluvioglacial sand and gravel, glacial sand and gravel, river terrace deposits and sub-alluvial deposits.3 2.5 Sand and gravel deposits are found in most parts of the county although they are concentrated in an area south of a line between Bishops Stortford in the east and Hemel Hempstead in the west (often referred to as the sand and gravel belt). This area covers the whole of the District Council areas of Three Rivers, Watford, Hertsmere, Welwyn Hatfield and Broxbourne. Large parts of the City and District of St Albans and East Hertfordshire are covered, BGS & ODPM, 2003, Technical report CR/03/075/N Mineral Resource Information in support of National, Regional and Local Planning: Hertfordshire and Northwest London Boroughs 3 BGS & ODPM, 2003, Technical report CR/03/075/N Mineral Resource Information in support of National, Regional and Local Planning: Hertfordshire and Northwest London Boroughs 2 4 Local Aggregate Assessment (November 2013) together with a small part of Dacorum. North Hertfordshire and Stevenage Districts fall outside the sand and gravel belt. 2.6 Of the sub-alluvial gravel deposits, these occur within the valleys of the rivers Mimram, Ver and Colne of St Albans and Hemel Hempstead areas. Resources have in many cases been extensively worked and exhausted in the Ver and Colne valleys. 2.7 Sand and gravel from Hertfordshire is mostly used by the construction industry. Most is washed and screened to remove clay particles and to separate the various sized stones and larger stones are usually crushed and screened again. Most sand extracted in Hertfordshire is sharp sand and is suitable for making concrete (when mixed with various selections of gravel sizes, cement and water). 2.8 Crushed rock (imported to Hertfordshire) may be used in place of local gravel, but sand may only be substituted by fines from crushed rock which is more costly to use because of its lesser binding properties. Building sand, for use in mortars, may also be washed and screened before use. Known as soft sand it is less commonly found in the county and is mostly imported. 2.9 Currently sand and gravel extraction takes place at four quarries in Hertfordshire; o Panshanger Quarry, Hertford; o Tyttenhanger Quarry, Colney Heath; o Westmill Quarry, Ware; o Hatfield Quarry with the linked Symondshyde extraction site. In addition, Rickneys Quarry just north of Hertford has temporary permission for extraction, however it is yet to be implemented. Two other sites have extant planning permission for sand and gravel extraction, although no extraction is now taking place, these are Water Hall and Dobbs Weir Quarries (see Table 2 for further details). Chalk 2.10 Chalk occurs as bedrock throughout much of the county. It is a major aquifer and is the most important source of groundwater in the county. The White Chalk runs through Watford and Hertford although much is covered by superficial deposits and chalk crops out along the sides of the valleys of the rivers Ash and Lea near Hertford and the Colne valley. The Grey Chalk is found in the north and far west of the county. 2.11 The Chilterns area within Hertfordshire is an area that consists of rolling chalk hills capped with Clay-with-Flints superficial deposits. This area runs from Tring to Hitchin, through Welwyn, St Albans and Watford. Steep chalk scarp slopes are found in Tring with gentler slopes covering a larger area. Gentler chalk hills than the Chilterns are found in the East Anglian Chalk area which runs from the Chilterns through Hertfordshire and South Cambridgeshire. 2.12 There were many chalk extraction sites in the past, essentially for local use. However today, the scale of working is relatively small and chalk is mainly Local Aggregate Assessment (November 2014) 5 quarried at a small number of sites to the north and west of the sand and gravel belt. Chalk in Hertfordshire is extracted for use as an agricultural lime on farms both within and outside the county. 2.13 There are currently three chalk extraction sites in Hertfordshire: o Codicote; o Bedwell Park just outside of Hertford; and o Anstey. Clay 2.14 Hertfordshire sits within the Northern Thames Basin Character Area with geology of mostly London Clay overlain with superficial deposits of sand and gravel. The west Anglian Plain with geology of Gault Clay adjoins the northern part of the county and the Eastern Anglian Plain covers a large part of the East of the county with underlying chalk with a covering of Boulder Clay. 2.15 The scale of working for brick clay is relatively small. The only brick clay is located in the Hemel Hempstead area. Brick clay is extracted for use at specialist brickworks in the county, of which there is one remaining in the county, in Bovingdon. The bricks are made from mottled clays of Reading Formation and Clay-with-Flints. Hard rock 2.16 There is no hard rock found in the county. Hertfordshire imports crushed rock into the county via the rail aggregate depots. Reserves from outside of Hertfordshire will be relied upon for this source of mineral. Marine aggregates 2.17 3. Hertfordshire is a land locked county and as such contains no areas suitable for the dredging of marine aggregates. A relatively small amount of marine sand and gravel is consumed in the county which is imported via Kent and London. SAND AND GRAVEL SALES 3.1 Sales of sand and gravel (including soft sands) for the ten year period between 2004 and 2013 inclusive are shown in Figure 2. The figures are based on actual sales data retrieved from the county’s Aggregate Monitoring Survey. 3.2 However, there have historically been difficulties in obtaining mineral data and this problem is recognised nationally. Only some minerals data is made available to the minerals planning authority or can be inaccurate, inconsistent and incomplete. The county council is part of the East of England Aggregates Working Party (EEAWP), which is a technical working group comprising mineral planning authorities and other interested parties that are working together to obtain better survey data which is used by individual authorities and collated in the East of England Authorities’ Monitoring Report. It is hoped 6 Local Aggregate Assessment (November 2013) that in the years to come the data available for both minerals and waste will be more available and consistent. Figure 2: Sales of sand and gravel in Hertfordshire 2004 – 2013 0.99 1.27 1.12 1.13 20 13 1.01 1.17 20 12 0.97 1.21 20 10 1.05 20 08 1.2 1.0 1.23 20 07 Million tonnes 1.4 20 09 Total Sand and Gravel Sales 0.8 0.6 0.4 0.2 20 11 20 06 20 05 20 04 0.0 Year Source: HCC AMR 2013 and EEAWP Aggregate Monitoring Survey return 2013 3.3 Sand and gravel production in 2013 was very similar to that in 2012. Sales peaked twice over 1.20 million tonnes over the last 10 year period. 3.4 The average sales of sand and gravel in Hertfordshire over the last 10 years is 1.12 million tonnes (2004-2013). As a comparison, this figure was 1.13 million tonnes as of 2012, 1.17 million tonnes as of 2011 and 1.21 million tonnes in 2010, showing a downward trend. 3.5 The rolling 3 year average is 1.17 million tonnes per annum (2011-2013). This highlights a downward trend from the 1.19 million tonnes per annum in 2012 and 1.22 million tonnes per annum recorded for the end of 2011. 3.6 Based on 2013 levels Hertfordshire contributed 12% of the sand and gravel sales in the East of England region4. 3.7 Of the sales of primary aggregates in Hertfordshire in 2009, 74% was within Hertfordshire (890,000 tonnes), 3% was to the East of England (39,000 tonnes) and 23% was to other destinations (278,000 tonnes).5 3.8 Figures for reserves are available from 2007. The table below shows the sales figure alongside the reserves figure for sand and gravel in Hertfordshire. 4 East of England Aggregates Working Party Annual Monitoring Report 2013 9d, DCLG & BGS, 2009, Collation of the results of the 2009 aggregate minerals survey for England and Wales 5 Table Local Aggregate Assessment (November 2014) 7 Table 1: Sand and gravel sales compared with permitted reserves in Hertfordshire since 2001 Year Sales of soft sand Permitted reserves of and sharp sands soft sand and sharp and gravel (tonnes) sands and gravel (tonnes) 2004 1,047,000 - 2005 965,238 - 2006 1,230,885 - 2007 1,010,466 10,840,668 2008 988,517 10,869,000 2009 1,214,3066 10,619,000 2010 1,172,890 10,786,465 2011 1,268,465 16,700,000 2012 1,123,645 15,792,000 2013 1,130,295 16,260,000 Source: HCC Annual Monitoring Report 2013 & Annual East of England Aggregates Working Party Aggregates Monitoring Survey forms 2013 3.9 The table above shows that between 2007 and 2010 the permitted reserves of sand and gravel in the county remained fairly constant; however this is now at a higher level due to additional planning permissions and reassessment of actual reserves by operators. Extraction sites 3.10 There are currently seven quarries in Hertfordshire with planning permission for the extraction of sand and gravel, with only four currently extracting. The details of these are presented in Table 2 below. 3.11 Based on 2013 levels Hertfordshire contains 11% of the permitted sand and gravel reserves in the East of England region7. 3.12 Anecdotal evidence suggests that sites are not producing enough sand and gravel to keep up with demand. 6 There is a slight difference between the figure in the HCC Annual Monitoring Report 2010 and the figure recorded by the East of England Aggregate Monitoring Survey for 2009 (1,214,306t and 1,207,000t respectively) 7 East of England Aggregate Working Party Annual Monitoring Report 2013 8 Local Aggregate Assessment (November 2013) Table 2: Permitted sand and gravel extraction sites in Hertfordshire Active Site Operator Status Westmill Quarry – Ware Hatfield Quarry – Symondshyde Farm Cemex UK Ltd Active. Sand and gravel quarry with landfill (local authority collected waste). Active. Sand and gravel processing plant on original Hatfield Quarry site area. Tyttenhanger Quarry – Colney Heath Lafarge Tarmac Panshanger Quarry – Hertford Lafarge Tarmac Permitted but Inactive Site Operator Rickneys Quarry – Chapmore End Water Hall Hanson Quarry Products Europe Ltd Frank Lyons Dobbs Weir Quarry Lafarge Tarmac 3.12 Cemex UK Ltd Active. Sand & gravel quarry and inert landfill. Permission in February 2011, for the extraction on land identified as Preferred Area No.3, in the Minerals Local Plan Review 2002-2016. Restoration with inert fill in early dug areas. Sand and gravel processing plant operational on site. Status Mothballed site. No current extraction taking place. Sand & gravel quarry and inert landfill. Mothballed site. No current extraction taking place. Sand and gravel reserves under plant site which has a materials recovery facility permitted until 31-11-2014. No reserves remaining. Cessation date for planning permission 31-12-2017. 01-10-2020. 31-12-2032. Extraction to cease by 31-12-2030. Cessation date for planning permission Unimplemented permission. Extraction to cease in 2017. Extraction and processing to cease in 2016. Restoration until 2042. In addition there are 4 sand and gravel quarry sites that are currently in the restoration phase. These sites are as follows: Pole Hole/Hollingson Meads in Gilston near Harlow (inert landfill permission expires 21-2-2042), Great Westwood Quarry near Watford, Water Hall in Bayfordbury near Hertford (Bunker’s Hill - inert landfill permission expires 31-11-2014. Hoddesdon Quarry. Local Aggregate Assessment (November 2014) 9 Figure 3: Geology of Hertfordshire with permitted sand and gravel sites © Crown copyright and database rights 2014 Ordnance Survey 100019606 Apportionments 3.13 The current annual apportionment for Hertfordshire is 1.39 million tonnes of sand and gravel. 3.14 The county’s sand and gravel apportionment figure has changed over time due to periodic reviews. In 1998 the annual apportionment was set at 2.4 million tonnes. The annual apportionment in the current adopted Minerals Local Plan was set at 1.99 million tonnes for the time period 2002-2016 (as detailed in former Minerals Planning Guidance Note 6: Guidelines for Aggregates Provision in England, 1994-2016, dated April 1994, as amended June 2003). This figure was subsequently reviewed through the National and Regional guidelines in 2009 and now stands at 1.39 million tonnes for the time period 2005-2020. This sub-regional apportionment was approved by the East of England Aggregate Working Party based on the Managed Aggregate Supply System (MASS) which was in operation at the time and now forms part of the NPPG. 3.15 Figure 3 provides a comparison of Hertfordshire’s sales figures over the ten year period 2004 to 2013 against the county’s apportionments during this period. 10 Local Aggregate Assessment (November 2013) Figure 4: Comparison of Hertfordshire’s total sand and gravel sales 2004 - 2013 and apportionment levels of 1.99 million tonnes in 2004 to 1.39 million tonnes from 2005 onwards Sand and Gravel sales compared with apportionments Million tonnes 2.5 2 Apportionments 1.5 Sand and Gravel sales 1 0.5 20 13 20 12 20 11 20 10 20 09 20 08 20 07 20 06 20 05 20 04 0 Year 3.16 The apportionment level changed in 2005 8 from 1.99mtpa to 1.39mtpa. It can be seen in the graph that sales have been below apportionment levels and do not meet apportionments for any year, although came close in 2006 and 2011. 3.17 The government has revised the apportionment over time. It announced revised requirements for national and regional aggregates provision in 2009, which were lower than the previous requirements published in 2003. When regional planning was in place, the review of the East of England Regional Plan recommended an annual apportionment of 1.44 million tonnes. However, publication in September 2009 of the National and Local Guidelines for Aggregate Provision in England from 2005-2020 9 provided a figure of 1.39 million tonnes and with the abolition of regional planning this apportionment figure has been agreed and set locally for Hertfordshire by the East of England Aggregates Working Party. 3.18 The 2009 guidelines states in Annex A that the revised apportionment reflects an overall fall in national demand for sand and gravel and crushed rock, an increase in the assumed contribution use of alternatives to primary aggregates notably construction and demolition waste, an increase in the assumed contribution of marine sand and gravel and decrease in the assumed contribution of net imports. 3.19 Figure 4 illustrates how this lower apportionment level reduces the gap between sales and apportionments. Local approach to determining apportionment figures 10 year and 3 year sales averages 3.18 The NPPF states in paragraph 145 that Mineral Planning Authorities (MPAs) should prepare an annual LAA ‘based on a rolling average of 10 years sales 8 As 9 set out in CLG, 2009, National and regional guidelines for aggregates provision in England 2005-2020; DCLG, 2009, National and regional guidelines for aggregates provision in England 2005-2020; Local Aggregate Assessment (November 2014) 11 data, and other relevant information, and an assessment of all supply options (including marine dredged, secondary and recycled sources)’. When planning for a steady and adequate supply of aggregates, such local information includes geology, environmental issues, local demand and past patterns of supply. 3.19 The government’s aim is to provide a simpler and more transparent approach to calculating the apportionment than the sub-regional apportionment method that relies on a complex model incorporating a range of confidential variables. 3.20 The NPPG suggests the use of the 3 year sales average to identify a general trend in sales and consider increasing supply if this is appropriate. The NPPG suggests that the rolling 10 year average , 3 year average sales and sub-regional guidelines should all be had regard to in order to establish a broad view of planned provision. 3.21 The difference in the agreed apportionment and average sales are as follows: Sales and apportionment Million tonnes per annum Agreed apportionment 1.39 10 year sales average 1.12 (2004-2013) 3 year sales average 1.17 (2011-2013) 3.22 The NPPG states MPAs can plan for more or less than the figure set out in the sub-regional guidelines based on their LAA and ‘in those areas where apportionment of the land-won element has already taken place, those figures may be used as an indicator as to how much should be planned for’ (NPPG, paragraph 071). 3.23 There may be advantages of taking into account average sales data over a period of time which levels out the peaks and troughs of an economic cycle by accounting for periods of slow (2008-2011) and high (2001-2007) economic growth. However, the table above shows that if the current ten or three year sales averages were used to calculate the sand and gravel landbank for Hertfordshire, this would result in a lower provision being planned for. This figure will change yearly due to the rolling average of sales data, but at present would place additional pressure on neighbouring MPAs to meet any shortfall if the demand for aggregates rises such as increased certainty of a higher level of future growth in the county as Local Planning Authorities set their housing figures. Landbank of permitted mineral reserves 3.24 Permitted reserves of sand and gravel in Hertfordshire (i.e. sites with planning permission to extract) are currently 16,260,000 tonnes (as of the end of 2013) (see table 1). The annual apportionment for Hertfordshire is 1,390,000 million tonnes based on the DCLG 2009 guidance. 3.25 By using the permitted reserves and dividing this figure by the annual apportionment figure, this shows the landbank in years. A landbank is 12 Local Aggregate Assessment (November 2013) defined in the Minerals Local Plan as ‘a stock of planning permissions for the winning and working of minerals’. 3.26 The current landbank (as of the end of 2013) for Hertfordshire is 11.7 years. 3.27 As a comparison, landbanks for the previous years (all based on 1.39mtpa since 2005) were as follows: o 12 years in 2011 when additional planning permissions were approved; o 7.8 years in 2010. The reason for this lower figure is due to the fact that Rickneys was not permitted at this time which is reflected in the subsequent years. 3.28 Sand and gravel permitted reserves that make up the figure to calculate the landbank are contained in six sites in Table 2 (Westmill, Hatfield, Tyttenhanger, Panshanger, Rickneys and Water Hall). The latest return for Dobbs Weir stated that there are no remaining reserves to extract. 3.29 Table 3 shows the most up-to-date landbank calculations based on the reserves and showing the difference when sales figures are used compared with the apportionment figure. Table 3: Landbanks for sand and gravel in Hertfordshire in 2013 Permitted reserves as at 31/12/2013 East of England AWP apportionment for Herts 2005-2020 Landbank based on EEAWP apportionment (years) 16,260,000 1,390,000 11.7 Permitted reserves as at 31/12/2013 10 year average sales 2004-2013 Landbank based on 10 year average sales (years) 16,260,000 1,115,171 14.6 Permitted reserves as at 31/12/2013 3 year average sales 2011-2013 Landbank based on 3 year average sales (years) 16,260,000 1,174,135 13.8 3.30 The NPPF states that MPAs should make provision for the maintenance of landbanks of at least seven years for sand and gravel and should prepare an LAA based on a rolling average of 10 years sales data and other relevant information. This is provided by way of securing planning permissions for sites that will provide aggregate over this period to fulfil the apportionment on a yearly basis. As stated in the table above, the landbank in the county is currently above the recommended seven year level, when based on the agreed EEAWP apportionment. The level of provision of sand and gravel would be extended by further years when calculating it against the ten and three year sales averages. Timeline for mineral planning 3.31 For mineral planning purposes the landbank is crucial. The council will consider the existing high level of planned provision when reviewing the Minerals Local Plan. Based on the reserves and given the end date of the existing Minerals Local Plan (2002-2016) and time for working up the review Local Aggregate Assessment (November 2014) 13 document from now, it is considered that a reasonable time frame would be 2016-2031. This is in line with the NPPF, in paragraph 157 which states that Local Plans should be drawn up over an appropriate time scale, preferably a 15-year time horizon. Start of plan 2016 end of plan 2018 (11.7-14.6 year landbank) 2028-2031 2031 adoption 4. IMPORTS AND EXPORTS 3.32 Data relating to the sales and consumption of aggregates are collected and collated at the national and regional level. The most up to date published figures have been used in this report. 3.33 A national four-yearly Aggregate Minerals Survey (AMS) provides in–depth and up to date information of regional and national sales, inter–regional flows, transportation, consumption and permitted reserves of primary aggregates in England and Wales. Conducted by DCLG and BGS the latest survey was carried out in 2009. Table 4 has been compiled using the AMS 2009 report with additional information obtained through direct correspondence with the BGS relating to the origin and destination of aggregates. For comparison purposes data from 2009 has been used, as this is the year which has a complete set of data. Table 4: Hertfordshire’s primary aggregates imports and exports (2009) Mineral Import amount (tonnes)10 Consumption Export (tonnes)11 (tonnes)12 Land won sand and gravel Marine sand and gravel Total sand and gravel 163,000 1,053,000 317,000 Balance (importsexports) (tonnes) - 154,000 1,000 0 + 1,000 164,000 1,054,000 317,000 - 153,000 Crushed rock Total aggregates 413,000 577,000 413,000 1,467,000 0 317,000 + 413,000 + 260,000 1,000 Note: In balance column, a ‘-‘ prefix indicates a net export, and a ‘+’ prefix indicates a net import. 3.34 The latest Aggregate Minerals Survey in 2009 showed that movements of sand and gravel into and out of Hertfordshire are not self-balancing (Table 4). Overall, Hertfordshire is a net exporter of sand and gravel, although there 10 Table 10, DCLG & BGS, 2009, Collation of the results of the 2009 aggregate minerals survey for England and Wales 11, DCLG & BGS, 2009, Collation of the results of the 2009 aggregate minerals survey for England and Wales 12 Table 9d (calculation of land won sand and gravel to the East of England plus elsewhere) DCLG & BGS, 2009, Collation of the results of the 2009 aggregate minerals survey for England and Wales 11 Table 14 Local Aggregate Assessment (November 2013) is a small amount of marine sand and gravel imported. Hertfordshire relies on imports of crushed rock, as this is not found in the county. Sand and Gravel 3.35 Of the total sand and gravel consumed in Hertfordshire (1,054,000 tonnes) as reported in the AMS 2009: 85% came from within Hertfordshire; 5-10% came from Essex; 5-10% came from Bedfordshire (Central and Bedford Borough) Milton Keynes, Cambridgeshire, Buckinghamshire, Kent, Derbyshire, Staffordshire, Leicestershire and Northamptonshire each supplied less than 1%; (NOTE: Oxfordshire, Gloucestershire, Hampshire, Suffolk, Cheshire East and Berkshire also supplied less than 1% each and tonnages were small as to be only a few lorry loads). Marine sources 3.36 Of the 1,000 tonnes of marine sand and gravel consumed in Hertfordshire as reported in the AMS 2009 (Table 11): 3.37 49% was supplied via Kent; 51% was supplied via London.13 In summary, of the imports of sand and gravel into Hertfordshire, 94% came from within the East of England area and 6% from outside the East of England area. 14 Crushed Rock 3.38 Of the total crushed rock consumed in Hertfordshire (413,000 tonnes) as reported in the AMS 2009 (Table 11): 3.39 58% came from Leicestershire; 20-25% came from Derbyshire; 5-10% came from Somerset; 5-10% came from Yorkshire Dales NP; 1-5% came from Powys; Northamptonshire, Rutland, Cumbria and Oxfordshire each supplied less than 1%. 15 In summary, of the imports of crushed rock, 100% came from outside the East of England area. 16 Information supplied directly by BGS Information supplied directly by BGS 15 Information supplied directly by BGS 16 Information supplied directly by BGS 13 14 Local Aggregate Assessment (November 2014) 15 From a national perspective the UK Minerals Yearbook 2013 following: 17 reports the In the UK in 2012, there were; 3.40 50 million tonnes of sand and gravel consumed; and 83 million tonnes of crushed rock consumed; 526 sand and gravel workings in the UK (as at April 2014) 18; Of the aggregates produced in the UK in 2012:- 19 3.41 41.8 million tonnes was land-won sand and gravel; 14.2 million tonnes was marine dredged sand and gravel; 93.5 million tonnes was crushed rock; and 3 million tonnes was clay and shale and fireclay (for bricks). Total imports of sand and gravel and crushed rock into the UK in 2012 were 39.2 million tonnes and total exports from the UK were 68.2 million tonnes. 20 The Annual Minerals Raised Inquiry (AMRI) 2012 reports the following: In Hertfordshire, 12,000 tonnes of clay was extracted and sold for the manufacture of bricks, pipes and tiles; 21 In Hertfordshire, 25,000 tonnes of chalk was extracted and sold for agricultural uses. 22 From the East of England area perspective the Area’s Annual Monitoring Report 2013 reports the following: Hertfordshire contributed 12% of sand and gravel sales in the East of England in 2013; 23 Only Cambridgeshire & Peterborough has a higher landbank of sand and gravel than Hertfordshire in the East of England; 24 The East of England landbank (average over all authorities) stood at 9.8 years using the sub-regional apportionment figure derived from the National and regional Guidelines 2005-2020.; 25 Page 22, BGS, 2014, United Kingdom Minerals Yearbook 2013, Minerals and Waste Programme Open Report OR/14/036 18 Page 18 of BGS, 2014, United Kingdom Minerals Yearbook 2013, Minerals and Waste Programme Open Report OR/14/036 17 19 (http://www.bgs.ac.uk/mineralsuk/statistics/downloads/MineralsProducedInTheUnitedKingdom.pdf ) Page 19 of BGS, 2014, United Kingdom Minerals Yearbook 2013, Minerals and Waste Programme Open Report OR/14/036 21 Table 8, DCLG & ONS, 2014, Annual Mineral Raised Inquiry (AMRI) ‘Mineral extraction in Great Britain 2012’, Business Monitor PA1007 22 Table 9, DCLG & ONS, 2014, Annual Mineral Raised Inquiry (AMRI) ‘Mineral extraction in Great Britain 2012’, Business Monitor PA1007 23 Figure 2 of East of England Aggregates Working Party, Annual Monitoring Report 2013 24 Page 7,of East of England Aggregates Working Party, Annual Monitoring Report 2013 20 16 Local Aggregate Assessment (November 2013) Cambridgeshire & Peterborough and Norfolk are the only authorities in the East of England that extract rock and propose to maintain current extraction rates; Although likely to be under-representations, in 2013 the EEAWP area imported over 1.4 million tonnes of aggregate (sand and gravel and crushed rock) from outside the area by rail depots and wharfs. In comparison exports of aggregates from the area by rail were over 264,000 tonnes. 26 Sales and consumption 3.42 The following table shows the comparison of sales and consumption in Hertfordshire in 2009. Table 5: Sales and consumption in 2009 Destination Hertfordshire East of England Elsewhere Total Sales of Land Won Sand & Gravel (2009) Consumption Proportion 74% 3% 23% Assumed Figure 890,000t 39,000t 278,000t 100% 1,207,000t 1,467,000t Source: DCLG & BGS, 2009, Collation of the results of the 2009 Aggregate Minerals Survey for England and Wales 3.43 The AMS indicated that most of Hertfordshire’s sand and gravel produced is consumed in the county (74%). Of the exports, the majority of the sand and gravel is used outside of the East of England region (23%). Rail aggregate depots 3.44 Linked with the mineral industry is the need for rail aggregate depots within the county. Hertfordshire has a total of five such sites which are at: Hitchin; Langley Sidings, Stevenage; Rye House, Hoddesdon; Harper Lane, Radlett; and Orphanage Road, Watford. 3.45 These are shown on the proposals map in the Hertfordshire Minerals Local Plan, 2007 and Minerals Consultation Areas Supplementary Planning document, and are safeguarded facilities. 3.46 Crushed rock passes through Langley Sidings. Concrete batching is carried out at Orphanage Road, ready mix at Langley Sidings and Harper Lane and 25 Page 7,of East of England Aggregates Working Party, Annual Monitoring Report 2013 9 & 10 of East of England Aggregates Working Party, Annual Monitoring Report 2013 26 Pages Local Aggregate Assessment (November 2014) 17 asphalt plants at Langley Sidings and Harper Lane. The asphalt plant is no longer operating at Rye House, instead the site only handles dry stone. However Hitchin rail aggregate depot is not currently operating. 3.47 18 Further discussions are planned to be carried out with the rail aggregate depots to obtain a comprehensive understanding of the destinations of minerals to and from these sites. Local Aggregate Assessment (November 2013) Figure 5: Hertfordshire’s rail aggregate depots © Crown copyright and database rights 2014 Ordnance Survey 100019606 Brick Clay 3.48 Hertfordshire has one site which excavates brick clay for the use on-site in the production of specialist bricks. The current planning permission at the site runs until 31 December 2025 for extraction. 3.49 There is no apportionment for clay provision; however the NPPF requires that a stock of permitted reserves of at least 25 years for brick clay is required. The adopted Minerals Local Plan did not require a landbank of brick clay. The review of the Minerals Local Plan therefore needs to address this issue. This will be planned for in the review of the Minerals Local Plan and could be shown as a Mineral Safeguarded Area(s). 3.50 Reserves at the site are unpredictable due to the nature of the deposit. In accordance with the current planning permission, there are reserves at the site for another 11 years. It is therefore unlikely that at present reserves will remain over the life of the proposed plan period. 3.51 However, information in the EIA Screening Opinion submitted by the specialist brickworks 27 indicates that there could be potential for a further 18.7 years of clay extraction subject to planning permission. This could result in 29.7 years worth of clay when combined with the extant planning Chamley Associates, April 2014, Bovingdon Brickworks Limited, Pudds Cross Proposed Brick-Clay Extraction, Preliminary Outline for an Environmental Impact Assessment (EIA) Screening Opinion 27 Local Aggregate Assessment (November 2014) 19 permission lifespan, which would be more than sufficient to cover the required 25 years supply stated in the NPPF. 3.52 In the interim, the existing policies in the adopted Minerals Local Plan 20022016 can be relied upon by decision makers to determine any planning applications that may come forward until the Minerals Local Plan is reviewed. The NPPF is a material planning consideration and therefore would need to be taken into account. Therefore reference to the NPPF may be necessary should any issues relating to clay come forward before the review of the Minerals Local Plan. Chalk 3.53 Chalk is extracted in Hertfordshire for use as an agricultural lime on farms to improve soil quality and is therefore classed as an industrial mineral rather than an aggregate used in construction (e.g. for use in cement). As such it is not necessary to plan for a separate landbank for this resource. 3.54 The Annual Minerals Raised Inquiry Survey 2012 states that there were sales of 25 thousand tonnes of chalk in Hertfordshire for agricultural uses.28 For information purposes and the monitoring of sites the table below provides further information on these sites with permitted reserves:- Table 6: Permitted chalk extraction sites in Hertfordshire Site Codicote Quarry Bedwell Park Quarry Anstey Chalk Quarry 4. 4.1 Operator Codicote Quarry Ltd BP Mitchell Haulage Contractors Ltd Status Currently active. Extraction since 1948, in two parts: RoMPP (northern part) and IDO (southern part). Currently active. Winning and Anstey working of chalk Quarry and reclamation of Company Ltd the site by the importation of inert waste. Cessation date for planning permission Extraction to cease by 21/2/2042 Extraction to cease by 21/2/2042 Extraction to be completed by 31/12/2013 and importation by 30/06/20. RECYCLED AND SECONDARY AGGREGATE Mineral Planning Authorities are expected to plan for aggregates, taking account of all sources and having regard to the overall objective to minimise the amount of primary extraction. Recycled and secondary aggregates play Table 9, DCLG, 2014, Annual Minerals Raised Inquiry Survey ‘Minerals extraction in Great Britain 2012, Business Monitor PA1007’ 28 20 Local Aggregate Assessment (November 2013) their part in providing a source of material for construction which reduces the need for extraction at quarry sites and reduces the amount of waste from construction sites needing to be landfilled. With these obvious benefits, the use of this material is encouraged. The county council is monitoring in its AMR, under target 8 of the Waste Core Strategy and Development Management Policies document, the annual percentage diversion of C,D&E waste from landfill. A considerable amount of inert waste is currently being used in the restoration of extraction sites. 4.2 Recycled aggregates are aggregates produced from reprocessed construction, demolition and excavation (CD&E) waste. This includes crushed concrete, stone and brick, asphalt road planings and railway ballast 4.3 Secondary aggregates are usually by-product wastes from construction, industrial or mineral extraction processes. This includes both natural and manufactured materials such as glass, incinerator bottom ash, fine ceramic waste, scrap tyres, flue ash,slag, china clay, coal and slate extraction and spent foundry sand. 4.4 The processing of aggregate occurs both on construction sites for reuse on the same site or off site for use in other construction works. Inert Waste Management in Hertfordshire 4.5 The data available on recovered material that can be sold as recycled and particularly secondary aggregate is variable and not considered completely reliable. The county council receives limited data provided by site operators in the annual surveys relating to aggregate recovery. Of the data provided by operators in 2013, there was 209,778 tonnes of recycled and secondary aggregate produced in Hertfordshire. 29 The figure reflects the slow in the rate of construction projects in recent years. 4.6 According to the Environment Agency’s Waste Data Interrogator, 2011 figures showed that 229,206 tonnes of inerts C,D & E waste was treated in the county. This figure does not however include figures at waste transfer stations that bulk up and transfer aggregate on to recycling facilities for processing. 30 4.7 At the sub-regional level, the most recent study on recycled and secondary aggregate arisings was undertaken in 2005 by a contractor on behalf of DCLG. The figures for Hertfordshire featured in the report as a combined figure with Bedfordshire to show that these two authorities produced a combined 1,269,259 tonnes of recycled aggregates.31 4.8 The adopted Waste Core Strategy and Development Management Policies document concludes that there is sufficient permitted capacity within the county for the disposal and treatment of this waste stream.32 29 Hertfordshire County Council annual waste survey 2013 30 HCC, 2013, Authority Monitoring Report DCLG, 2007, Survey of Arisings and Use of Alternatives to Primary Aggregates in England, 2005 Construction, Demolition and Excavation Waste 32 Waste Core Strategy and Development Management Policies Development Plan Document, p. 30, paragraphs 3.20 and 3.21. 31 Local Aggregate Assessment (November 2014) 21 Secondary and Recycled Aggregate Sources 4.9 There are currently nine sites with planning permission for the recovery of inert CD&E waste in Hertfordshire, as listed below. Some sites also process C&I waste. Figure 6 shows the location of these sites in the county. COMPANY Eco Aggregates. SITE Cole Green Way/Birchall Lane, Welwyn Garden City Quarry Anstey Chalk Pit, Anstey The Anstey Company Ltd The Codicote Quarry Company Ltd Winters Haulage Lafarge Aggregates Ltd BP Mitchell Burnside & Peter Brothers Ltd Frank Lyons STATUS Temporarily permitted until April 2016 Temporarily permitted until June 2020 Codicote Quarry, Temporarily permitted Codicote until February 2042 5 Hunting Gate, Hitchin Permanent Harper Lane (Rail Loop) Permanent Burnside, Hatfield Permanent Inert waste recycling for final restoration of the site only. Brycelands Removals Ltd Jacks Hill, Graveley Permanent Envirowaste Recycling Land adjacent to B197 Permanent Centre North of Graveley 22 Pole Hole Local Aggregate Assessment (November 2013) Figure 6: Location of permitted recycled/secondary aggregates sites in Hertfordshire for the production © Crown copyright and database rights 2014 Ordnance Survey 100019606 Local Aggregate Assessment (November 2014) 23 of 5. FUTURE AGGREGATE SUPPLY AND DEMAND Supply 5.1 As shown in the calculations of sand and gravel landbanks in table 3, using the EEAWP sub-regional apportionment of 1.39mtpa (11.4 years), the 10 year rolling average sales (14.6 years) or the 3 year average sales figures (13.8 years), the county does not have sufficient permitted reserves to fulfil the requirement for a 15 year Minerals Local Plan period. As such the county council will seek to address this by alocating sufficient land in the review of the Minerals Local Plan. 5.2 A comparison of the sub-regional apportionment with the shortfall is shown below: Table 7: Requirement for sand and gravel in Hertfordshire over the plan period of 15 years to 2031 Annual provision 10 year average sales (20032012)(Mt) 1.12 EEAWP apportionment 2009 (Mt) 1.39 Total Plan Requirement: Annual provision x plan period (15 years) 16.80 20.85 Permitted Reserves (2013) Minus this figure 16.26 16.26 Shortfall 0.54 4.59 5.3 Historically the nationally prescribed regional apportionment figure for mineral provision was sub divided proportionally between authorities within the Region under the Managed Aggregates Supply System which was in operation at the time. This approach to calculating apportionments has now changed with the introduction of new national guidelines in the NPPF and the NPPG. The NPPG states in paragraph 060 (Reference ID: 27-06020140306) that the MASS ‘requires mineral planning authorities which have adequate resources of aggregates to make an appropriate contribution to national as well as local supply, while making due allowance for the need to control any environmental damage to an acceptable level’. 5.4 The NPPF seeks to plan for a steady and adequate supply of aggregates by preparing an annual Local Aggregate Assessment which should be ‘based on a rolling average of 10 years data and other relevant local information, and an assessment of all supply options (including marine dredged, secondary and recycled sources);’. In addition, the NPPG states in paragraph 064 (Reference ID: 27-064-20140306) that ‘Mineral Planning Authorities should also look at average sales over the last three years in particular to identify the general trend of demand as part of the consideration of whether it might be appropriate to increase supply’. 24 Local Aggregate Assessment (November 2013) 5.5 Whilst the average rolling 10 years sales could be one way of calculating provision, needing to be reported within the LAA, the NPPF also states that there is still heavy emphasis on the role of Aggregate Working Parties. The Government continues to encourage MPAs to be members of Aggregate Working Parties in addition to aggregate industry representatives. The East of England AWP is continuing in its capacity as it was when working under the regional planning system, and has collective sign up by authorities that it is appropriate for all MPAs in the East of England to continue to work with the 2009 EEAWP sub-regional apportionment figure for the foreseeable future. 5.6 In addition, when planning for mineral provision the NPPF provides the option for MPAs to factor in ‘other relevant information’. This therefore provides the scope for MPAs to assess other influences on the demand for aggregates. This links with the localism agenda whereby authorities are given the opportunity to factor in local issues that may influence the need for minerals in their area. However, determining what other relevant information consists of is a matter for the MPA to decide. For Hertfordshire it is considered that an assessment of the state of the local economy, will provide data that can be used to determine for what purpose and the timing that minerals will be required for development which can be fed into the review of the MLP. Demand 5.7 District and borough councils in Hertfordshire will plan for objectively assessed needs. Development will require aggregate materials for the construction of dwellings and associated infrastructure such as employment, roads, schools and retail. This includes both the need for land won aggregates and recycled and secondary aggregates. Population projections 5.8 The latest estimate of the usual resident population of Hertfordshire is 1,140,700 as at 30/6/13.33 This is an increase of 11,60034 in the last year. Using the Office of National Statistic’s published data of the 2012-based subnational population projections for England, population projections for Hertfordshire suggest an increase of approximately 271600 (24.05%) in population over the 25 year period from 2012 to 2037.35 Housing completions and forecast 5.9 The Spatial Planning and Economy Unit at Hertfordshire County Council annually surveys the county to check on the permitted housing developments that have been started and completed. Information obtained for 2013 shows: 33 ONS mid-2012 population estimates, as reported in Hertfordshire’s Local Information System (www.hertslis.org) 34 www.hertslis.org 35 ONS mid-2012 population estimates, as reported in Hertfordshire’s Local Information System (www.hertslis.org) Local Aggregate Assessment (November 2014) 25 There were 3,069 housing completions in 2013. This figure is lower than that of previous years. There were 3,507 housing starts in 2013. This figure is higher than that of previous years. Only 3 of the housing starts recorded were also completed within this year. This shows that developments are not being completed rapidly. 5.10 The Hertfordshire Local Enterprise Partnership’s Strategic Economic Plan (LEP SEP) is planning for housing provision of 16,600 homes. 5.11 The following table shows a summary of the housing projections that each District/Borough Councils have decided will need to be constructed based on each authority areas objectively assessed housing needs: District/Borough Council Planned housing requirement Broxbourne 300 per annum Dacorum 430 per annum (10,750 from 20062031) East Herts 750 per annum (15,000 from 20112031) Hertsmere 266 per annum (3,990 from 2012-2027) North Herts (10,700 from 2011-2031) This works out to be 535 per annum St Albans 360 per annum Stevenage 534 per annum (8,000 over plan period) Three Rivers 180 per annum (4,500 by 2025/26) Watford 260 per annum (6,500 from 2006-2031) Welwyn Hatfield 378 per annum (6,800 from 2011-2029) Key Planned Infrastructure Requirements 5.12 The requirement for minerals will increase in the event of the development of major infrastructure within Hertfordshire or in the surrounding areas. The council is mindful of other planned development that will be required to support additional housing growth in and around the county. Whilst mineral miles will be a consideration in the supply of minerals, specific quality of mineral may be required for schemes that is not readily available in the immediate vicinity of the project. As such Hertfordshire may be required to provide minerals to development schemes in neighbouring authority areas. Other significant schemes will be required to accommodate growth and will be monitored annually. 5.13 The known major development schemes and that are being planned in and around Hertfordshire that may require minerals to be supplied are as follows: 26 Local Aggregate Assessment (November 2013) Potential schemes detailed within Hertfordshire’s Local Enterprise Partnership Strategic Economic Plan (LEP SEP) A120 bypass Little Hadham; A602 improvements Stevenage to Ware; A1(M) improvements; Croxley Rail Link. Proposed large development schemes within the county recently considered planning applications: High Leigh, Broxbourne – mixed use development including 500 dwellings, education, commercial, retail and recreation; North of Bishops Stortford, East Herts – 2,200 dwellings; University of Hertfordshire, Welwyn Hatfield - student accommodation Hatfield town centre redevelopment, Welwyn Hatfield; QE11 Hospital redevelopment, Welwyn Hatfield – urgent care centre, outpatients, diagnostics, therapies and antenatal services, scheduled to open Spring 2015; Former Glaxo Smith Kline site, Welwyn – 180 dwellings; Watford Health Campus, Watford - new hospital/healthcare accommodation, together with business, retail, office, food and drink, hotel, and leisure uses, and up to 681 new dwellings, safeguarding of land for the expansion of Laurence Haines primary school, new public spaces and construction of three industrial business units; Mount Pleasant, Welwyn Hatfield – 116 dwellings (this is part complete); Terlings Park, Gilston, East Herts – 270 dwellings (this is part complete). Other potential developments that could come forward Oaklands College Campus, Smallford - scoping opinion for 350 dwellings. Other development potentially affecting Hertfordshire 6. 6.1 HS2 development; Crossrail. CONCLUSION Planning for mineral provision must be seen in the context of the wider economy and the government’s growth agenda. In light of the current economic recession which began in 2007, average sales of sand and gravel are likely to be skewed. Whilst there may be less of a need for minerals in the short term, mineral planning is concerned with longer term provision. We Local Aggregate Assessment (November 2014) 27 would not want for there to be an under supply that could restrict future development and hinder future economic growth which is currently being planned for at Local Planning Authority level. As such it is not considered to be a viable approach to simply plan for mineral provision on the average of the last 10 years of sales. 6.2 Whilst the option of using the 3 year average sales to plan for minerals may identify a local influence that requires either more or less minerals to be extracted, this is only a short term requirement. Data from the last 3 years (2009-2011) shows sales of sand and gravel in Hertfordshire at 1.22 mtpa which is 0.05mtpa higher than the 10 year average sales. The marginal increase in sand and gravel sales in the latter part of the last 10 years resulted in a dip in the figures in the middle of the three years and no general trend that has occurred. The use of the 3 year average sales data does not provide a clear direction for the 15 year MLP. 6.3 The rolling 10 year sales average may be a better indicator of the need for minerals by using a reasonable time span to judge the need for minerals in the county. However this level of mineral provision is below the last 3 years sales given that it has spanned the period of recession in latter years and a continuous decline in sales until 2005 in the lead up to the recession. It can be seen in Figure 2, when looking at the sales figures over the last 10 years that there is a possibility of a rise in sales just as easily as a decline. To this end, paragraph 14 of the NPPF refers to maintaining sufficient flexibility to adapt to rapid change. 6.4 Planning for mineral provision at the lowest of levels will not allow for any economic recovery out from recession. Paragraph 145 of the NPPF also states that the AWP figures should still be taken into consideration for the purposes of calculating future demand and supply of aggregates. Whilst it is recognised that recycled and secondary aggregates may reduce demand for land won provision of sand and gravel, the local data is not considered completely reliable to properly take account of this and adjust the land won provision requirement that has been debated by EEAWP members and based on a sound and thorough assessment of national need. The small amount of marine aggregates is not significant to adjust the apportionment figure either. 6.5 As such the council considers it sensible to plan in line with the EEAWP agreement and continue to plan for the sub-regional apportionment level to provide for flexibility to maintain supply when the economy recovers. This will ensure that an adequate and steady supply of aggregate is achieved over the longer term. 6.6 This LAA and subsequent annual updates will inform the Minerals Local Plan review. 28 Local Aggregate Assessment (November 2013) References BGS, 2014, United Kingdom Minerals Yearbook 2013, Minerals and Waste Programme Open Report OR/14/036 BGS & ODPM, 2003, Technical report CR/03/075/N, Mineral Resource Information in Support of National, Regional and Local Planning: Hertfordshire and Northwest London Boroughs; BGS, 2008, Aggregates supply in England, Issues for Planning; DCLG & ONS, 2014, Annual Mineral Raised Inquiry (AMRI) ‘Mineral extraction in Great Britain 2012’, Business Monitor PA1007; DCLG & BGS, 2011 (second edition), Collation of the results of the 2009 aggregate minerals survey for England and Wales; DCLG, 2009, National and regional guidelines for aggregates provision in England 2005-2020; DCLG, 2007, Survey of Arisings and Use of Alternatives to Primary Aggregates in England, 2005 Construction, Demolition and Excavation Waste; East of England Aggregates Working Party, Annual Monitoring Report 2013; East of England Aggregates Working Party Survey MPA Collation Form 2011; HCC, Hertfordshire Annual Monitoring Report 2011; HCC, Hertfordshire Authority Monitoring Report 2013; HCC, Hertfordshire Minerals Local Plan Review 2002-2016, adopted 2007; HCC Site Monitoring Reports, Spatial Planning and Economy Unit; Hertfordshire Environmental Forum, 2006, Biodiversity Action Plan for Hertfordshire, www.hef.org.uk Hertfordshire Partnership, A Biodiversity Action Plan for Hertfordshire, March 2006. Hertfordshire Quality of Life Report 2012 http://www.hertslis.org/resources/environment/qualityoflife/reports/report2012/ Mineral Produced in the UK in 2010 http://www.bgs.ac.uk/mineralsuk/statistics/downloads/MineralsProducedInTheUni tedKingdom.pdf National Planning Policy Framework (NPPF) (in particular paragraphs 145-146) Local Aggregate Assessment (November 2014) 29 National Planning Practice Guidance (NPPG) (in particular paragraphs 060071Further Information This document has been produced by the Spatial Planning and Economy Unit, Hertfordshire County Council. Should you have any questions in relation to this document please email spatialplanning@hertfordshire.gov.uk. 30 Local Aggregate Assessment (November 2013)