Monday's heavy rain and warm weather (+6) has seen a dramatic opening of the pond. However, it is not open to the bottom, but on top of a skin of ice, and under that skin, the water is moving fast and spilling down the ravine under the bridge, into the Arboretum where the mallards and black ducks are taking advantage of more and deeper water in the stream. You can see how the beaver dam is now exposed again. Further back towards the west end of the pond, it is still frozen, but I wouldn't trust it to hold!