Aggregate Industries can't be trusted on these either - we've written about stockpiles before.
Now AI says:
Maybe AI should have visited more views....the existing stockpiles do not currently break the wooded skyline in any of the views visited. It is therefore concluded that so long as the stockpiles do not significantly increase in height then this key landscape characteristic should be adequately protected for the duration of the proposed extension of time. EMMP 3.2 Management of Stockpiles