Drain blocking at Lake Vyrnwy using heather bale and peat dams (Credit: LIFE Active Blanket Bogs in Wales/Wildlife Trust Northumberland) Published July 13, 2015 at 1600 × 1200 in When you can’t see the peat for the trees! ← Previous Next → Drain blocking at Lake Vyrnwy using heather bale and peat dams (Credit: LIFE Active Blanket Bogs in Wales/Wildlife Trust Northumberland)