Original sentence: The industry began to decline in the late 19th century, and by 1904 only the Ashton Moss Colliery was still in use; it was also the last colliery to be opened in the area
Edited sentence: The industry began to decline during the late 19th century, and by 1904 only the Ashton Moss Colliery was still operational, the last colliery to be opened in the area