 Both the Oregon portion and the Payette River line originally were built as logging lines serving lumber mills, but in the last two decades of the 20th century, many of the mills were shuttered due to a decline in logging and lumber processing in much of the Pacific Northwest.As of 2012, the Idaho Northern and Pacific still served Boise Cascade mills in Elgin, Island City, and La Grande, Oregon.INPR formerly operated an ex-UP spur connecting Boise with the Union Pacific main line at Nampa.