DARTMOOR Preservation Association has accused two multi-national mineral companies of wanting 'to take out' an entire Dartmoor Valley and a tributary of the River Plym.
And on Saturday, the association's president Kate Ashbrook will address walkers at Cadover Bridge on the plans to build a super-quarry and clay waste tip.
The two walks, with an archaeological theme, will highlight the association's battle to prevent Imerys, formerly English China Clay, and Watts, Blake and Bearne of expanding their quarrying businesses on Dartmoor.
The mineral companies want to construct a super-quarry in the Blackabrook Valley, an important tributary of the Plym, and to use Shaugh Moor for tipping clay waste.
Shaugh Moor is internationally renowned for its Bronze Age antiquities, says the association and argues that the proposals are unnecessary, damaging to the environment and a compromising of National Park values.
'These walks follow on from the very successful protest rally held at Cadover last September,' said chief executive John Bainbridge.
'Most of the threatened antiquities are Scheduled Ancient Monuments. If scheduling means anything, then the Government should intervene to save these threatened sites.'
The Ramblers' Association, The Council for National Parks, RESCUE — The British Archaeological Trust, South Hams Against Rural Destruction, The British Horse Society, AGUA and many local and Dartmoor enthusiasts have expressed support for the campaign.
The Dartmoor National Park Authority is also opposed to the quarrying proposals.
The walks will start at 10.30am and 1.30pm and will be no more than three miles in length and will proceed at a gentle pace.