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canary grass wetlands might fall into this category but most seem to be dried out by early to mid-summer. Modifier"F" Semipermanentiv Flooded (Semipermanent) Surface water persists throughout the growing season in most years. When surface water is absent, the water table is usually at or very near the land surface (Cowardin et al 1979, pg 22; Santos and Gauster 1993, pg 31). This modifier applies to Type 3 cattail marshes and may also apply to some hardwood swamps such as black ash, conifer bogs and Type 6 alder shrub swamps. Modifier"G" Intermittently Exposed Surface water is present throughout the year except in years of extreme drought (Cowardin et al 1979, pg 22; Santos and Gauster 1993, pg 31). Type 4 wetlands fall into this category. Modifier"H" Permanently Flooded (Permanent) Water covers the land surface throughout the year in all years. Vegetation is composed of obligate hydrophytes (Cowardin et al 1979, pg 22). Modifier "J" Intermittentiv Flooded The substrate is usually exposed, but surface water is present for variable periods without detectable seasonal periodicity. Weeks, months, or years may intervene between periods of inundation. The dominant plant communities may change as soil moisture conditions change. According to Cowardin et al (1979, pg 22) "Some areas exhibiting this regime do not fall within our definition of wetland because they do not have hydric soils or support hydrophytes." Some of the areas in agricultural fields that have been flooded during the spring and early summer of 2003 and 2004, following periods of intense and persistent rainfall, may well fall into this category and may not in fact be subject to regulation as a wetland. Modifier "K" Artificially Flooded (Artificial) The amount and duration of flooding is controlled by means of pumps or siphons in combination with dikes or dams. Water and wastewater treatment facilities are included under this category. This definition does not appear to include stormwater ponds. Modifier "Z" Intermittently Exposed/Permanent (No comparable Cowardin categorv) Exhibits features of both Intermittently Exposed and Permanent water regimes (Santos and Gauster 1993, pg 31).