An incomplete set of Local 180's executive board meeting minutes comprise the bulk of the collection. The minutes start in 1900, a year after the Local began, and continue through 1981, with gaps from 1902 to 1904 and 1917 through 1941. Until 1967 handwritten minutes were kept in bound volumes; after that date they were typed. A few financial statements are included with the minutes and there is a letter from William Leshe, the Local's business agent, with the 1973 minutes.

Other items include membership applications from 1908 through 1912; a letter from a dentist detailing treatment of a union member is included with the applications; and a small file about jurisdictional disputes with other building trades unions that includes badly deteriorated xerographic copies of job site photographs that have been copied onto acid-free paper. Lastly, there is a file that had been marked "history" that contains a news clipping from about April 1957 of the union's history; a handwritten chronology; an ACLU leaflet decrying vigilantism in Santa Rosa, probably from the 1930s; two 1902 pamphlets advertising the American Federationist and other AFL materials; and a 1923 "Injunction Decree" enjoining implementation of the American Plan, a business strategy ultimately harmful to the union.