Emil Bronlund was in 1927 hired by Consolidated Mining and Smelting Ltd. (later known as Cominco) to take on the company's mining exploration in northern British Columbia, a position he held for almost 25 years. Bronlund had a Leica camera and took photographs during his exploratory trips.

This album of Bronlund's photographic negatives from 1930 to 1932 includes photographs of the following trips:

• Trip to Osilinka River and Omineca River, July 1930
• Copper Mountain on Duck Creek, July 1930
• Wedge Creek, Sept. 1930
• Finlay River, Finlay Forks, Parsnip River, and Crooked River, Oct. 1930
• Prince George, Aug. 1930
• Gola, Norway, Apr. 1931
• Emil Bronlund and Frank Swannell survey crews at Thutade Lake, June 1931 and Sept. 1931
• Cairn mining claim exploration for Consolidated Mining and Smelting Ltd., June-July 1931
• Brothers Lake, Bronlund Peak, and Fredricksen Lake, July 1932
• Sustut Lake, Sept.-Oct 1931
• McLeod River trip, Mar.-Apr. 1932

These historically important aerial photographs depict Williston Lake soon after its creation in 1968 with the building of the W.A.C. Bennett Dam on the Peace River. Also depicted are the rivers and tributaries that empty into the Williston Reservoir, such as the Finlay River, the Ospika River, and the Omineca River.

These remote-sensing aerial photographs were taken by Lockwood Survey Corporation Ltd. under contract for the B.C. Forest Service. Some photographs are annotated to show logging activity; clearcuts, slash piles, log booms, and tree debris on the water are also visible in some of the images. No detailed location information or index accompanies the photographs.