Oregon state troopers uncovered a large outdoor marijuana operation near The Dalles after spotting two men guarding ground while investigating an unrelated matter on 28 May 2007.[1] Both men ran, troopers caught one, and foot tracks led down a steep ravine to hundreds of watered plants, a camp with food, stoves and propane tanks, and guns.[1]

Troopers returned on 29 May and found several hundred more plants across four cleared forest plots, bringing the total to 8,900 plants police valued near US$9 million had they matured to harvest.[1] Luis Sandaval, 34, one of the men accused of fleeing, was arrested on several charges over the grow and held at the Northern Oregon Regional Correctional Facility.[1]