The Columbia River Highway, in Columbia County, has been completed... Contractors were very prompt in assembling their forces, and operations were well underway by June 30 [1915]... Several small line and grade revisions were made to better fit the existing roadbed.
The Marshland, east half of Beaver Valley, east half of Rainier and the Goble sections were covered with forces. The east half of the Inglis and west half of Beaver Valley sections were not opened up on account of lack of funds. Also, there was an old road, between Delena and Clatskanie, that could be used for the present time. From Goble, east, for about three miles was not opened, as a pretty fair road connects this stretch, which makes a wide detour back in the valley.
This work was completed in the late fall of 1915. There are now 25.5 miles of completed state road and 13.5 of uncompleted state road in Columbia County known as the Columbia River Highway...
The entire length is constructed on a standard twenty-four-foot width, with 5 per cent maximum grade.
This work being divided into seven different sections for construction purposes...
Length, 8.6 miles.
Length, 2.6 miles.
Length, 3.8 miles.
Work 80 per cent complete in 1914. No later work done on this section.
Length, 3.8 miles.
Work approximately 82 per cent completed in 1914. No later work done on this section.
Length, 5.5 miles.
Length, 3.1 miles.
Length, 5.7 miles.
It is one of the last remaining sections of the Old Columbia River Hwy and has 5 originally restored old bridges and two beautiful waterfalls. Its one of those untold secrets of Columbia County.
http://www.portlandhikers.org/forum/viewtopic.php?f=10&t=14626&p=110226
http://365waterfalls.blogspot.com/2013/05/february-15-16-2013.html