This picture is from my late father-in-law William (Bill) Demoskoff’s photo collection that he gave to me and his son Michael a few years go. It shows Pop with his friend Walter Barisoff posing on a bridge.
Bill wrote on the back of the photo:
Pop identified the ‘who’ and (some of) the ‘where’, but not the ‘why’ or the ‘when’. He moved to British Columbia from Saskatchewan to work in the Okanagan orchards in the mid-1940s, so the picture was presumably taken around that time.
As to which bridge on the Columbia River, it appears that it was the Kettle Falls Bridge in Washington State, USA, based on two factors: online images of that bridge  and a border manifest on which Pop, Walter and Ida (Walter’s wife) travelled by car into Washington at Danville (south of Grand Forks, British Columbia) on a day-trip in September 1944. 
1. “Historic American Buildings Survey, Engineering Record, Landscapes Survey”, database and images, Library of Congress (http://loc.gov/pictures/item/wa0436/ : accessed 25 June 2015), “Columbia River Bridge at Kettle Falls, U.S. Route 395 spanning Columbia River, Kettle Falls, Stevens County, WA”.
2. “U.S., Border Crossings from Canada to U.S., 1895-1956”, database and images, Ancestry.ca (http://www.ancestry.ca : accessed 5 June 2011), entry for William W Demowskoff [sic], 25 September 1944, Danville, Washington, USA; citing National Archives and Records Administration; Washington, D.C.; Manifests of Alien and Selected U.S. Citizen Arrivals at Anacortes, Danville, Ferry, Laurier, Lynden, Marcus, Metaline Falls, Northport, Oroville, Port Angeles, and Sumas, Washington, May 1917-Novembe [sic]; National Archives Microfilm Publication: A3403; Records of the Immigration and Naturalization Service.
Copyright © 2015, Yvonne Demoskoff.