Detailed Soil Survey of the Mount Revelstoke Summit Area.

(D1) Rapidly drained - soil moisture content seldom exceedsfield capacity in any horizon except immediately afterwater additions .(D2) Well drained - soil moisture content does not normallyexceed field capacity in any horizon except possibly theC, for a significant part of the year .(D3)Moderately well drained - soil moisture in excess of fieldcapacity remains for a small but significant period of theyear .(D4) Imperfectly drained - soil moisture in excess of fieldcapacity remains in subsurface horizons for moderatelylong periods during the year .(D5)Poorly drained - soil moisture in excess of field capacityremains in all horizons for a large part of the year .(D6) Very poorly drained - free water remains at or within 12inches of the surface most of the year .Specific reference tosurface drainage may be designatedin terms of run-off and described ashigh, medium, low, or ponded .Similarly, specific reference tothecharacteristics of horizonswithin the profile may be designatedin terms of permeability orpercolation and described asrapid, moderate, slow, very slow,and none .4 . HORIZON BOUNDARIESThe lower boundary of each horizon is described by indicatingits distinctness and form as suggested in the U .S . Departmentof Agriculture Soil Survey Manual (1951) .