Aggregate Supply Challenges Re-Emerge

摘要

Previously, I have likened aggregate supply to plumbing. The tank is a proxy for permitted land-won reserves, with pipes/pipelines being a proxy for 'capacity to supply' for all sources of supply - the six main aggregate 'sources of supply' being: 1. Recycled 2. Secondaries 3. Land-won rock 4. Land-won sand and gravel 5. Marine 6. Imports In 1973 the national 'tank' for England and Wales held around 7 billion tonnes of permitted reserves and the 'pipes' were supplying up to 270 million tonnes per annum of primary aggregates. Today the 'tank' is The MPA's Annual Mineral Planning Survey (AMPS) estimated to hold less than 4 billion tonnes but is only having to supply around 150-200 million tonnes per annum, with recycled and secondaries contributing around a further 60 million tonnes per annum.