 Following plans in 2011 to restart mining at South Crofty, and to build a supermarket at Hayle Harbour, the World Heritage Committee drafted a decision in 2014 to put the site on the List of World Heritage in Danger, but this was rejected at the 38th Committee Session at Doha, Qatar (July 2014), in favour of a follow-up Reactive Monitoring Mission.Up to the mid-16th century, Devon produced approximately 25-40% of the amount of tin that Cornwall did but the total amount of tin production from both Cornwall and Devon during this period was relatively small.After the 1540s, Cornwall's production took off and Devon's production was only about between a ninth to a tenth of that of Cornwall.