 During the era of log floating , <unk> sometimes occurred when logs struck an obstacle . <unk> rafts floating down the West Branch had to pass through chutes in canal dams . The rafts were commonly 28 feet ( 9 m ) wide — narrow enough to pass through the chutes — and 150 feet ( 46 m ) to 200 feet ( 61 m ) long . In 1874 , a large raft got <unk> in the <unk> of the Dunnstown Dam and caused a jam that blocked the channel from bank to bank with a pile of logs 16 feet ( 5 m ) high . The jam eventually trapped another 200 log rafts , and 2 canal boats , The <unk> of Newport and The Sarah Dunbar . 
