(Sandy, OR) -- The Camp Creek Fire near the Bull Run Reservoir continues to slowly grow. Heavy rain fell on the fire last week, but because it's burning under a thick canopy of trees in moss and dead wood on the forest floor, it continues to expand at a slow rate. The Portland Water Bureau is monitoring the reservoir, because it's the city's source of drinking water. There's currently no threat to the Water Bureau's equipment. The fire has burned around 19-hundred acres. It's 16-percent contained. There aren't many roads in the area, which makes it difficult to build containment lines.