Complex sentence: The medieval moat has a diameter of 130 m, is on average 18 m wide and 2.4 m deep and is water-filled in parts; the south side has been destroyed by the construction of agricultural buildings over it.
Split into simpler sentences: The medieval moat has a diameter of, is on average wide and deep. The moat is water-filled in parts though the south side has been destroyed by the construction of agricultural buildings over it.