T86 wetlands are an uncommon complex containing a mixture of Lyngbye's sedge (T6) and a diverse herbaceous and graminoid plant community (T8).  When beachrye berms are also present the wetland is named T6-8.  T86 complexes were mapped at two locales at the mouth of the Kenai River.  T86 wetlands occur at the upper edges of protected estuaries, where flooding occurs only once or twice per summer, on the highest spring tides. 

Lyngbye's sedge (T6) represents areas, which, although they flood infrequently, retain water for extended periods (more than 5 days).  The rich herbaceous component (T8) is inundated an average of once per summer (range 0-2 times for a duration of 2-3 hours) by the highest spring tides (Vince and Snow, 1984).  Beachrye (T7) wetlands are found on coastal storm berms and higher riverbank levees.  Vince and Snow (1984) describe 'Riverbank Levees' dominated by other grasses, and that "Still higher levees featured [Beachrye] and large forbs..."  Their lower elevation riverbank levees flood an average of 1 time per summer; probably higher T7 beachrye berms or levees flood only when storms correspond with the highest spring tides.

The single T6-8 unit mapped to date is found in an unusual location.  It lies west of Cannery Road in the City of Kenai on a marine terrace that subsided after the 1964 earthquake.  There, from the shoreline landward, a beachrye (Leymus mollis ssp mollis) storm berm (T7), a diverse seashore plant community (T8), and  Lyngbye's sedge (T6), roughly segregate in narrow linear bands between Cook Inlet and a rarely flooded sweetgale (Myrica gale) peatland.  This terrace probably receives significant groundwater discharge from the bluff above it.