Records of the Central Southeast Preservation Project (CSEPP), an organization that nominated multiple properties in Southeast Portland, Oregon, for historic landmark status in the late 1980s. The collection includes administrative records, National Register of Historic Places nomination forms, color slides and black and white negatives of buildings, and survey and research documentation.

Collection consists of 19 color slides taken by Robert S. Cline. They include scenes of Celilo Falls on the Columbia River and the surrounding landscape; fishing platforms and Native people fishing; and a tram over the falls.

Collection consists of 23 color slides depicting the burning of the Forestry Building at NW 28th and Upshur St. in Portland, Oregon, on August 17, 1964. The building, designed by architect Ion Lewis, was constructed for the Lewis and Clark Exposition in 1905. It was described as the world's largest log cabin or the Timber Temple.

Collection consists of 67 color slides of Oregon locations taken by Claude and Marguerite Killion of California during travels in the 1950s.

Two color slides of Multnomah Falls from John Yeon's property on the Washington side of the Columbia River.

Collection consists of 129 color slides of the Portland Rose Festival parade in 1946, 1958, and 1961.

Color slides depicting the construction and opening ceremony for the First National Bank of Oregon building at 1300 SE 5th Ave. in Portland, Oregon. The building is now the Wells Fargo Center. Ralph J. Voss (1910-2002) was president of the bank and oversaw the project to construct its headquarters. The building was reported by the Oregonian newspaper to be the tallest in the state at the time of its construction.

This collection contains photographs and slides likely received and compiled by Chris L. Wheeler (1927-2013) during the time he served as state engineer of Oregon from 1962-1975. The bulk of the photographs depict the Tumalo Irrigation Project in Deschutes County, Oregon, from 1913-1915. Other photographs, color slides, and albums depict state and private irrigation efforts in Oregon from approximately 1910-1925, and dams and reservoirs in Oregon from 1950-1967.