Fell Trees Away from Water Directionally fell trees away from waterways, lakes, wetlands or the sea. Any trees that fall in water should be pulled out as soon as possible. Remove all wood greater than 10cm (100mm) diameter from waterways. Minimise Ground-based Harvesting Fewer tracks equates to less sediment run-off and a lower chance of failures. Minimise ground-based harvesting unless it can be undertaken on easy contoured land and with a minimum number of tracks. 17 StreamStrea m