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• If scientifically significant fossils (all vertebrate fossils, their tracks or traces, and some <br /> invertebrate or plant fossils identified as rare or important by the scientific community)are <br /> discovered, Dolores County Road& Bridge would be required to suspend operations that <br /> might further disturb such materials, and immediately contact the BLM's Authorized <br /> Officer (TRFO Manager) so the fossil resources could be assessed and, if necessary, <br /> removed prior to resumption of mining. The authorized officer shall evaluate the discoveries <br /> brought to their attention and determine within 10 working days what action shall be taken <br /> with respect to such discoveries. The responsibility and cost of investigations and salvage of <br /> such values discovered during approved operations shall be the Federal Government's. <br /> BLM Special Status Species (Animal)and Migratory Birds <br /> • Operator shall only remove vegetation before May 1 or after June 30 to minimize <br /> disturbance to migratory birds. <br /> Wildlife(Terrestrial) <br /> • Big Game timing restriction December 1 through April 30. Exceptions to this restriction <br /> may be allowed with coordination with Colorado Parks and Wildlife <br /> Water Resources/Quality(drinking/surface/ground) <br /> • The pit should be designed to have no overland flow enter or leave the project site. This <br /> may entail constructing ditches on the uphill side of the pit to move water around the pit <br /> and constructing a berm on the downhill side to ensure no water leaves the pit during heavy <br /> precipitation events. <br /> • Site should be inspected periodically to ensure that berms, ditches, and other BMPs as <br /> described in the SWPPP are functioning properly. <br /> Soils <br /> • The site shall be inspected periodically to ensure no erosional features are forming at the <br /> site and if discovered, stabilized at the earliest practical time. <br /> • During reclamation of the site,all final slopes shall be 3:1 or less unless it can be engineered <br /> by a qualified engineer. <br /> 2.2 Alternative B—No Action <br /> Under the No Action alternative,the BLM would not authorize Dolores County Road and Bridge's <br /> application to enter into a contract. Mining operations would not expand onto BLM-administered <br /> land adjacent to the existing material pit. This would result in an earlier termination of mining at <br /> the Disappointment Pit location and a reduced ability to provide material for regional construction <br /> needs. <br /> Disappointment Valley Gravel Pit Expansion EA DOI-BLM-CO-S010-2024-0021 EA <br /> Tres Rios Field Office <br /> 8 <br />