So our plan, when we first positioned the wood form, for getting it out from under our newly built Haliburton Canada 150 Dry Stone Bridge later this week was to chainsaw the supporting 4x4s and have them drop away low enough to have the form drop too and then slide out easily.
Only problem is (as this illustration shows) the water level has risen a foot since Monday and now we'll need to use the chain saw under water!