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C. Nonflow Related Activities <br />Nonflow activity related changes from the "without fish" scenario are those that stem from <br />activities generated by oil and gas operations, mining operations (sand and gravel), <br />construction (recreation and /or private dwellings), and the stocking of nonnative fishes. <br />These are activities that might well impinge upon the recovery of the endangered fishes. <br />1. Oil, Gas, and Other Drilling Activities <br />Significant amounts of oil and gas have been developed in the Colorado River Basin. Little, <br />however, is known regarding the effects of critical habitat designation on this production. <br />The impacts to society of the additional cost of production resulting from listing or critical <br />habitat designation would be measured by a permanent loss of production. A marginal <br />production facility that is closed due to increased monitoring costs represents a loss of <br />production in the short term. Thus, the critical determination for well - related impacts <br />resulting from contaminants is what percentage of producing wells will be capped and what <br />percentage of the actual production will truly be lost to society. For purposes of this report, <br />given the lack of available information, oil and gas drilling activities were assumed to be <br />unaffected in the seven -State region. <br />2. Nonnative Fish Stocking and Fish Program <br />A questionnaire was designed to determine the effects of critical habitat designation on the <br />stocking and fishing programs in the seven - States area. Nonflow effects on these programs <br />were determined through the use of personal interviews with State game and fish personnel.' <br />3. Other Impacts <br />Other activities potentially impacted include sand and gravel operations, the construction <br />industry, and public recreation facilities. No data were available for the effects on sand and <br />3 There was a section of the survey that focused upon flow effects of the stocking program and these results <br />were incorporated into the recreation analysis. <br />I -25 <br />