In 2021, sales of secondary aggregates in Devon exceeded sales of sand and gravel – according to Devon County Council’s 11th Local Aggregate Assessment, published last week.
This is not a one-off – as previous LAAs confirm. It has been the case for the last 4 years. Indeed, sales have been growing for some time. Back in 2012, sales of secondary aggregates were 24% lower than sales of sand and gravel; in 2021, they were 30% higher.
Devon County Council commented:
the three years sales averages for... sand and gravel remain below the ten years sales averages for the second consecutive year [whilst] sales of secondary aggregates have increased by 14% in 2021 from the previous year
With hundreds of millions of tonnes of this waste product blighting the landscape in Devon and Cornwall, secondary aggregates are a sustainable alternative to primary virgin aggregates – the sort that will be dug up with untold damage at Straitgate Farm.
In the LAA, the Council explains:
3.3.1 The major source of secondary aggregates in Devon is the by-products derived from the extraction and processing of china clay in the Lee Moor area of Devon, which in 2021 accounted for 79% of the county’s production of secondary aggregates (a reduction of approximately 20% from 2020). For each tonne of saleable china clay, up to nine tonnes of other materials are produced, with two main elements capable of use as secondary aggregate: stent (rock), which can be used as general fill or, after crushing and screening, for other aggregate purposes; and tip sand (washed material comprising quartz, unaltered feldspar and mica) which, with grading and washing, can be used for a variety of aggregate purposes including concrete and building sand.3.3.5 Two new sources of secondary aggregates are included in this year’s figures, one of which is Hemerdon Mine, near Plymouth, where the current operator, Tungsten West, has expressed a clear intention to re-start the winning of tungsten and tin, and commenced commercial secondary aggregates production in February 2021 through a new company called Aggregates West. At the time of publication of this report, Aggregates West were also seeking to vary a condition on the mining consent which currently restricts the export of secondary aggregates to 50 HGVs per day. The second new site is the incinerator bottom ash (IBA) recycling facility at Hill Barton Business Park, Exeter, which was granted permission in November 2019 and became operational in February 2020. Whilst the upturn in secondary aggregates sales figures for 2021 can be partially attributed to these two new sites, it is considered that the significance of Hemerdon as a source of secondary aggregate could increase in the future if the current planning application is approved.
Since this was written, and as we posted, Tungsten West’s plans to increase HGV movements of secondary aggregates from the Hemerdon Mine from 50 to 200 per day have been put on hold, after its planning application DCC/4314/2022 – which attracted hundreds of objections – was withdrawn.
Meanwhile, and as we record here, the new LAA charts the fall in Devon's sand and gravel landbank from 7.6 years in 2020 to 6.5 years in 2021. This is less than the 7 years suggested by the NPPF, which allowed the Planning Inspectors to boldly claim "a shortage of sand and gravel in Devon" and thereby "great weight in favour" of permitting mineral extraction of the 1 million tonnes – a relatively minor 2 years' worth of additional landbank – at Straitgate Farm.
Inexplicably, the Inspectors chose to ignore the 23 million tonne resource at Penslade, sitting next door to Aggregate Industries’ processing plant at Hillhead, which will provide Devon with nearly 50 years' worth of the very same material.
