Open-file Report O-08-09, Regional Landslide Hazard Maps of the Southwest Quarter the Beaverton Quadrangle, West Bull Mountain Planning Area, Washington County, Oregon. Publisher: DOGAMI These maps of the West Bull Mountain Planning Area (WBMPA) of Washington County are some of the most detailed and accurate landslide maps in the United States due to the use of high-tech laser based terrain mapping called lidar, said Vicki McConnell, State Geologist and Director of DOGAMI. They are also the first in a series of landslide susceptibility maps DOGAMI will be releasing for the Portland metro area in the months to come. CD-ROM Price: $ 10.00