BLM Colorado - Cadstral Survey Records Survey Records Welcome to Survey Records for Colorado. Currently the survey records exist on microfilm and are available for reproduction when ordered through the Information Center.
Some records exist in digital format and are available from our data page .
Field notes contain a complete description of each mile surveyed, every monument set, and every bearing tree scribed. Plats show graphic representation of information contained in the field notes. Mineral Surveys, Field Notes and Plats 1850-present, Records of the mineral surveys approved by the General Land Office or the Bureau of Land Management for Colorado Tract books. These books note all transactions affecting public lands from the 1860's to July 1, 1965. The local land offices in Colorado maintained these books daily.