Mechanical sweep to pick up squashed conkers

Conkers fall from trees, on bends near Chestnut Farm, get squashed on highway, then when rain falls, some toxic substance from the conkers runs off to the Marlbrook, running though Cuxham, and could kill the brown trout, as it did last year (2014). We have managed to sweep up some, but mechanical sweeper would be better at lifting the squashed material and would be safer on these bends. Issue present since 1 October 2015.