Complex sentence: A log building that was built on unconsolidated river sediment close to the mouth of the Wenatchee River had dislodged roof logs, and the kitchen became detached from the rest of the structure, and another log cabin between Entiat and Winesap also had roof damage.
Split into simpler sentences: A log building that was built on unconsolidated river sediment close to the mouth of the Wenatchee River had dislodged roof logs, and the kitchen became detached from the rest of the structure. Another log cabin between Entiat and Winesap also had roof damage.