Documents have been uncovered that address the Kalapuya mounds in the Tualatin and Yamhill valleys. The most famous Kalapuya mounds are those that were along the Calapooia river and tributaries from Corvallis to Sweet Home. In this area over 100 mounds existed. Most of these mounds have been plowed under, so that there may be less than ten mounds remaining. There is one other area that had mounds, the Longtom River had recorded mounds, but research records have yet to be discovered. The mounds, which Albert Gatschet called Atudship mounds, were burial mounds of Kalapuyans. The area mounds appear to … Continue reading Mounds of the Tualatin-Yamhill Kalapuyan Area