Complex sentence: The line also continued east from Hay River, NWT, along the south shore of Great Slave Lake, to a mine at Pine Point, however this section was subsequently abandoned in 1992 once concentrate shipments from the closed mine ceased.
Split into simpler sentences: The line also continued east from Hay River, NWT, along the south shore of Great Slave Lake, to a mine at Pine Point Mine. This section was abandoned in 1992 once concentrate shipments from the closed mine ceased.