Water pools in valley where trunks branch off
I have three maple trees that have deep valleys (after digging out the sludge) where the main trunks branch off. The valleys at the "y" where the trunks meet have water pooling - aproximately 12 to 15 inches deep. I am concerned that the water has rotted the trunks and the trees may split. What can I do to check for rotting, and can this problem be fixed? Any info would be greatly appreciated. Thanks.