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to East Salt Creek. These drainages aze typically dry with the exception of a few days each yeaz <br />when runoff is generated from summer convective storms. While no water quality data are <br />available for these drainages, water quality is projected to be somewhat poor. Data collected <br />from other streams in the area had elevated sediment and total dissolved solids concentrations. <br />The primary ions were sodium, magnesium, and sulfates. High levels of these constituents are <br />reflective of the Mancos shale geologic formation common in the Grand 'Valley and historic land <br />use. <br />Environmental Consequences/Mitigation: The drilling of the geotechnica] investigation holes <br />would have minor to no impact on water quality. While several holes aze in close proximity to <br />the ephemera] drainages (one is within 50 feet), the topography is fairly level and no surface <br />leveling would be needed for the drilling operation. The upgrading of the access road in section <br />10 to access holes 11 and 12 could produce sediment impacts to the adjacent drainages. This <br />azea is steep and the existing road needs to be upgraded because of erosion. Method of <br />construction is not detailed, so it is assumed that a cat would be walked up the road and the blade <br />dropped in locations that aze cun•ently impassible. If the azeas of construction (including blading <br />or clearing operations) exceed one acre, the state of Colorado needs to be contacted to determine <br />if a stormwater permit would be required. For any disturbance area exceeding 5 acres, a <br />stormwater permit would be required. If there would be any dischazge into jurisdictional waters <br />of the United States as defined in 33 CFR Section 328.3, a permit from the US Army Corps of <br />Engineers would be required. <br />Finding on the Public Land Health Standazd for water quality: No violation of water quality <br />standards would occur from this action, therefore Standard 5 would be met. <br />WETLANDS & RIPARIAN ZONES (includes a finding on Standard 2) <br />Affected Environment: There aze no riparian or wetland zones associated with the proposed <br />action. <br />Environmental Consequences/Mitigadon: none <br />Finding on the Public Land Health Standard for riparian systems: N/A <br />WILD AND SCENIC RIVERS <br />Affected Environment: No wild and scenic rivers are located within the proposed action azea, <br />therefore none would be affected. <br />Environmental Consequences/Nlitigation: N/A <br />WII,DERNESS <br />Affected Environment: No designated wilderness or WSA's aze located within the proposed <br />action area, therefore none would be affected. <br />Environmental Consequences/Mitigation: N/A. <br />NON-CRITICAL ELEMENTS <br />The following elements must be addressed due to the involvement of Standards for Public Land <br />Health: <br />