2023-01-04_PERMIT FILE - M2022013 (25)

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Denver 1842 North Clarkson Street, Denver, CO 80218 Durango 835 East Second Avenue, Suite 400, Durango, CO 81301 ERQ Hotchkiss 161 South 2nd Street, PO Box 932, Hotchkiss, CO 81419 ERO Resources Corporation Idaho 7154 West State Street, Suite 398, Boise, ID 83714 November 30, 2022 Brad Janes, Forester Raptor Materials 8120 Gage St. Erie, CO. 80516 RE: Two Rivers OMLR Comment Dear Mr.Janes, Response for Wildlife Impacts: My understanding is that mining is dependent on the aggregate market and the law of supply and demand. Both the timing (schedule) and amount of extraction will depend on the demand for materials and any single point in time. The mine must have maximum flexibility to mine to be able to respond to the market forces that are outside of their control. Maximum flexibility under the mine plan would allow for up to "four separate extraction teams" working concurrently. Under this "worse-case" scenario and adhering to the maximum of 16 acres of mining by each extraction team would result in a maximum of 64 acres being extracted at any one time. To put this into context,the majority of the extraction operations and soil stockpiling will be conducted in on the approximately 235 acres currently under high intensity farming. Extraction on 64 acres would only be a little over one-quarter of the agricultural land. Expanding this concept to include the riparian corridors within and immediately adjacent to the extraction area,there is over 1,000 acres between CR 378 (54th Street Road) and CR 394. A maximum of 64 acres being actively extracted would amount to only 6.4 percent of the 1,000 acres, leaving more than 93 percent of the area available to wildlife. Sincerely, Ronald Beane Senior Wildlife Biologist ERO Resources Corporation I Consultants in Natural Resources and the Environment www.eroresources.com