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Orono Subdivison <br /> Loren Butterfield <br /> Vegetative Dominance and Strata <br /> Dominance refers strictly to the spatial extent of a species that is directly discernible in the field. The most abundant <br /> plant species that immediately exceeds 50 percent of the total dominance for a given stratum, plus any additional <br /> species comprising 20 percent or more of the total are considered dominant plant species for that stratum. Strata for <br /> which dominants are determined include: <br /> 1.Tree->5 inches DBH and 20 feet or taller. <br /> 2. Sapling-0.4 to<5 inches DBH and 20 ft or taller. <br /> 3.Shrub-3 to 20 feet tall including multistemed,bushy shrubs,trees and saplings <br /> 4.Vines-includes all woody vines. <br /> 5.Herb-includes all herbaceous plants(grass,sedge,forbs,ferns,etc.) <br /> National Wetland Inventory <br /> The National Wetland Inventory(NWI)is prepared by the U.S. Department of the Interior,Fish and Wildlife Service. <br /> NWI maps are prepared primarily by stereoscopic analysis of high altitude aerial photographs. Wetlands were <br /> identified on the photographs based on vegetation, visible hydrology, and geography in accordance with <br /> Classification of Wetlands end Deepwater Habitats of the United States(FWS/OBS-79/31 December 1979). The <br /> aerial photographs typically reflect conditions during the specific year and season when they were taken. In addition, <br /> there is a margin of error inherent in the use of the aerial photographs. Thus, a detailed on the ground and historical <br /> analysis of a single site may result in a revision of the wetland boundaries established through photographic <br /> interpretation. In addition,some small wetlands and those obscured by dense forest cover may not be included on this <br /> document. Federal, State and local regulatory agencies with jurisdiction over wetlands may define and describe <br /> wetlands in a different manner than that used in this inventory. There is no attempt,in either the design or products of <br /> this inventory,to define the limits of proprietary jurisdiction of any Federal, State or local government or to establish <br /> the geographical scope of the regulatory programs of government agencies. Persons intending to engage in activities <br /> involving modifications within or adjacent to wetland areas should seek the advice of appropriate Federal, State or <br /> local agencies concerning specified agency regulatory programs and proprietary jurisdictions that may effect such <br /> activities. <br /> Symbology <br /> P-Palustrine <br /> RB—Rock Bottom <br /> UB—Unconsolidated Bottom <br /> EM-Emergent SYSTEM <br /> SS—Scrub Shrub SUBSYSTEM - <br /> FO—Forested eUPLAND <br /> MASS <br /> OW—Open Water SUBCLASS,WATER REGIME <br /> A—Temporarily Flooded <br /> B-Saturated (NON-WETUWD) <br /> C—Seasonally Flooded <br /> D—Seasonal Well Drained <br /> E—Seasonal Saturated <br /> F—Semi-permanently Flooded R20r <br /> p Y vt� <br /> G—Intermittently Flooded (LINEAR DEEPWATER HABITAT) <br /> H—Permanently Flooded Special Modifiers <br /> b-Beaver <br /> d—Partially Drained/Ditched <br /> f—Farmed <br /> S—Spoil <br /> x—Excavated <br /> 2006-226wdr.doc <br />