The Roscommon soils are on nearly level areas and depressions of outwash and lake plains and in glacial drainageways. Slope gradients range from 0 to 2 percent. They are on the higher better drained parts of the landscape. Various organic soils on the wetter parts are the common associates. Poorly drained and very poorly drained.
Surface runoff is very slow or ponded.
Permeability is rapid. This soil is ponded or has a high water table within 1 foot of the surface, at some time during the months of September through June. More than 90 percent is in forest. A small percentage is in permanent pasture, or in hay and small grains. Forests are chiefly balsam fir, black spruce, jack pine, northern whitecedar, quaking aspen, red maple, and yellow birch.