Laserfiche WebLink
2019 Wetland Delineation Report <br /> Tucson South Sand and Gravel Mine—Brighton, Colorado <br /> Indicator Status Occurrence in Wetlands <br /> Facultative (FAC) Equally likely to occur in wetlands or non-wetlands (estimated probability 34%- <br /> 66%). <br /> Facultative Upland Usually occur in non-wetlands (estimated probability 67%-99%), but <br /> (FACU) occasionally found in wetlands (estimated probability 1%-33%). <br /> Upland (UPL) Almost always occur in non-wetlands under natural conditions (estimated <br /> probability>99%). <br /> Not Listed (NL) Not Listed plants are assumed to be UPL as defined in the user notes for the <br /> Great Plains 2016 Regional Plant List. <br /> 3.1.2 Cowardin Classification <br /> Wetlands were classified according to Classification of Wetlands and Deepwater Habitats in the <br /> United States(Cowardin et al. 1979) during the field survey. The classification system, also known <br /> as the Cowardin Classification, was developed as a tool to aid in distinguishing the different types <br /> of wetlands. Three wetlands classes were identified in the Project area: palustrine (non-tidal) <br /> emergent wetlands (PEM), palustrine scrub/shrub wetlands (PSS), and palustrine forested <br /> wetlands (PFO). Palustrine features are typically situated in depressional topography. Emergent <br /> wetlands consist of erect and rooted wetland plants. Scrub/shrub wetlands are dominated by <br /> woody vegetation less than 20 feet tall. Forested wetlands are dominated by woody vegetation <br /> 20 feet high or taller. <br /> 3.1.3 Wetland Soils <br /> Soil from each soil pit was evaluated for hue, value, and chroma in each observable horizon using <br /> Munsell Soil Color Charts (Gretag 2009). Each soil horizon was also checked for texture and for <br /> the presence of redoximorphic features, depleted matrix, saturation, and other specific criteria <br /> used to document hydric conditions. Each paired wetland and upland soil pit was mapped using <br /> a Trimble Geo 7X handheld GPS with sub-meter accuracy. <br /> 3.1.4 Wetland Hydrology <br /> Hydrology was analyzed for primary and secondary wetland indicators. Primary wetland indicators <br /> included visible inundation, soil saturation, water marks, drift lines, sediment deposits, and <br /> drainage patterns in wetlands. Secondary wetland indicators of wetland hydrology included <br /> observable features such as oxidized root channels associated with living roots, water-stained <br /> leaves, soil cracks, and local soil survey data. Once established, the soil pits were left open a <br /> sufficient amount of time to allow the apparent high water table, if present, to stabilize. <br /> 3.1.5 Wetland Determination Data Forms <br /> Sample plots that exhibited qualifying characteristics of hydrophytic vegetation, hydric soils, and <br /> wetland hydrology were identified as wetlands. A Wetland Determination Data Form, specific to <br /> the Great Plains Region, was completed for each paired wetland and upland sample plot. The <br /> wetland determination data forms are included in Attachment 2. <br /> 5 <br />