Complex sentence: By the 1880s Fenit harbour was built which was a deep water harbour and did not suffer from silting while a railway was constructed between the harbour and Tralee carrying cargo and freight from ships moored there.
Split into simpler sentences: By the 1880s Fenit harbour was built which was a deep water harbour and did not suffer from silting. A railway line was constructed between the harbour and Tralee carrying cargo and freight from ships moored there.