Summer passenger trains between Oquossoc and Kennebago were replaced in 1933 by a railbus built in the Sandy River and Rangeley Lakes Railroad shops.
The railway was then extended south from Leeds Junction to Brunswick to connect with the standard gauge Kennebec and Portland Railroad in 1861.
Maine Central leased the Androscoggin Railroad in 1871, and converted its own line to standard gauge in 1873.
A branch line was completed from Canton to Chisholm in 1897 and extended to a connection with the former Androscoggin Railroad at Livermore Falls in 1899.
Maine Central leased the entire line from Rumford Junction to Oquossoc in 1907, and extended it to Kennebago.