The average annual precipitation is about 55 inches. Mukilteo muck - pasture. The organic material in which this soil formed ranges in thickness from 52 inches to more than 10 feet. These soils are usually saturated with water. They are strongly acid or very strongly acid.
Fibers are mostly sedge and moss.
The surface tier has hue of 5YR or 7.5YR, value of 2 or 3, and chroma of 1 or 2. It commonly has one or more layers of sapric material but ranges from sapric to fibric material. It has weak to moderate blocky structure. The rubbed fiber content averages from 16 to 60 percent. The bottom tier is similar in color and fiber content to the subsurface tier, but is generally higher in fiber content.