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Wetland Delineation Report for Gravel LLC Property Proposed Gravel Mining Operations ].0 INTRODIICTTON Prymorys Environmental Consulting, LLC. consultant 1. Peter ]ensen was sent by Gravel LLC to assess a property and properties affected by the proposed gravel mining operation. Field investigations were performed on the 18`"and 22cd of August, 2005. L1 OBJECTIVES L To determine any Waters of the United States subject to impacts from the proposed construction activity. 2. To delineate identified Waters of the United States for planning the proposed activity. 3. To interpret the measurable impacts. 7.2 LOCATION The property is located on private lands in La Plata County, Colorado; along the Florida River below the La Plata County Airport. Township and range coordinates aze; Sec.3Q T.34N. R.8W. N.M.P.M (Appendix A; Figure 1). The total area surveyed is restricted to the acquired property for gravel mining, as well as a those properties crossed by easements associated with the project (e.g, access easement). 2.0 AREA DESCRIPTION The project site is located on the Florida River valley below the Florida Mesa to the west. The area covets the entire river valley as well as the pinion juniper terrace slopes bordering the property to the east and west. This property is characterized by irrigated fields a[ the base of the river tertaces and riverine habitats along the Florida River corridor. One large man-made pond with no inlet or outlet is located in the north- west corner of the property (Photo 1) and the surrounding areas, including the irrigated fields are heavily grazed by cattle, horses, as well as commercial elk Relief within the Florida River cortidor ranges from 1- 4%alortg the open parts of the valley and can be as great as 30% along the east and west terraces. Relatively flat to mildly rolling pasture and farmland is common on the tops of the terraces to the east and west of the property. These azeas are typically heavily irrigated. 2.7 GEOLOGY " " ' ''`~ The location sits on the northern extent of the San Juan ~ ~ ~ ~ -~++=~; ° ~' structural basin south of the Fmitland Coal outcrop. Photo r: nw Property P°oa The Florida River valley through this area is surrounded by remnant quaternary alluvial river terraces from the Pleistocene and more recent glacial advances from the mountainous region in the northem part of the County. The shales and sandstones of the Nacimineto formation are typical mid slope and above the western retrace ridge with gravels and alluviums of the pre-Bull Lake age intermittent within these areas. The river valley and the eastern terrace present the pre-Bull Lake age alluviums throughout their extent. 2.2 VEGETAT/ON Vegetation is variable within the alluvial valley depending on the influences from human manipulation and elevation. The lower benches of Florida River coridor are vegetated with Populus angustifolra, Craraegus axons eq,mp+ ~hpnmm,d cm~ieoe, ac