Keywords: Willowcr.jpg Willow Creek Dam which forms Willow Creek Lake near Heppner in the northeastern part of Oregon This is the first major dam built using roller-compacted concrete http //www nww usace army mil/html/pub/pi/images/willowcr jpg U S Army Corps of Engineers Estimated viewpoint is 45 35092 -119 54221 PD-USGov Gravity dams in the United States Dams in Oregon Lakes of Oregon Heppner Oregon |