The Early Government Land Survey in the Puget Sound Area
The General Land Office (GLO) mapped the Puget Lowland between about 1850 and 1890 as part of their cadastral survey of the United States and its territories for the Public Land Survey System that began soon after the Revolutionary War. Because the survey in the Puget Sound area was prior to, or in the earliest stages of, Euro-American settlement, the plat maps and field notes capture conditions prior to widespread land use change.
Detail from plat maps T. 34N. R. 3E. & T. 34N. R. 4E, surveyed in 1872, showing the Skagit River near the present-day location of Mount Vernon. A large logjam is in the river and wetlands are to river right. While navigable rivers such as the Skagit River were surveyed (“meandered”), other features, such as the wetlands shown here, were surveyed along section lines and sketched within the interior of sections.
Scanned plat maps and field notes for Washington and Oregon are available online from the Bureau of Land Management. These records are also available on microfiche at libraries including the University of Washington library
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