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,) C <br /> On-site wetland determinations were made using the three criteria (vegetation, soil, and <br /> hydrology) and technical approach defined in the Regional Supplement. According to the <br /> procedures described therein, areas that, under normal circumstances, reflect a predominance of <br /> hydrophytic vegetation, hydric soils, and wetland hydrology (e.g., inundated or saturated soils) <br /> are considered wetlands. The geospatial boundary of each wetland would be captured using a <br /> Global Positioning System (GPS)-enabled tablet. Each wetland feature would be assigned a <br /> unique feature identification number with a "W" prefix. A Wetland Determination Data Form would <br /> be completed for each wetland and its associated upland data point. Upland data points would be <br /> assigned a unique feature identification number with a "U" prefix. Representative photos were <br /> taken of all identified features. <br /> TRC followed the September 2023 WOTUS rule to evaluate the jurisdiction of wetlands and <br /> waterbodies. Under this rule, the USACE recognizes jurisdictional determinations for wetlands <br /> and aquatic resources that are relatively permanent, standing or continuously flowing bodies of <br /> water with a continuous surface connection to a jurisdictional water (e.g., traditional navigable <br /> water, territorial seas, interstate water). Wetlands and aquatic resources determined by the <br /> USACE as having no continuous surface connection with a jurisdictional water are deemed non- <br /> jurisdictional for the USACE. TRC used aerial imagery to supplement field observations to <br /> anticipate determinations of downstream connectivity where land access was not available <br /> outside the Project. <br /> 3.3 Waterbodies <br /> Based on recent USACE guidance and the USACE's 2008 A Field Guide to the Identification of <br /> the Ordinary High-Water Mark (OHWM) in the Arid West Region of the Western United States <br /> (Lichvar and McColley 2008), delineated waterbodies were identified by the presence of bed and <br /> bank or other OHWM indicators. Common identifiable indicators of an OHWM include open water <br /> or evidence of a clear, natural line visible on the bank; shelving; changes in soil characteristics; <br /> disturbance to, or lack of, terrestrial vegetation; presence of litter and debris; and watermarks <br /> indicative of inundation during high water conditions. The OHWM typically represents the potential <br /> limits of USACE jurisdiction. The geospatial boundary of each waterbody would be captured using <br /> a GPS-enabled tablet. Each waterbody feature would be assigned a unique feature identification <br /> number with an "S" prefix. For NWI-and NHD-identified stream features where OHWM indicators <br /> were absent, representative photos and photo point locations were recorded. These areas are <br /> classified as uplands. <br /> The USACE criteria to identify jurisdictional determinations for waterbodies include the continuous <br /> presence of OHWM indicators and downstream connectivity to jurisdictional waterbodies. <br /> Downstream connectivity for delineated waterbodies in the field would be determined based on <br /> the continuous presence of an OHWM and connection to downstream waterbodies. Outside the <br /> Study Area where land access was not available, aerial imagery was used to supplement field <br /> observations in determining downstream connectivity. For delineated features that did not have a <br /> continuous bed and bank or continuous evidence of an OHWM, these features were determined <br /> not to have downstream connectivity. For features with periodic OHWM indicators but no <br /> downstream connectivity, the geospatial boundary of the waterbody would be mapped where the <br /> OHWM indicators were present. <br /> Colorado Sand Company LLC—Kersey Mine December 6, 2023 <br /> Wetland and Waterbody Delineation Report 3 <br />