PERMFILE43635

• Permit No: M1988112
• IBM Index Class Name: Permit File
• Doc Date: 11/8/1988
• Section_Exhibit Name: APPENDIX L AQUATIC BIOLOGICAL SURVEY OF RITO SECO
• Media Type: D
• Archive: No

i
INTRODUCTION
This report presents the results of an aquatic reconnaissance to characterise the existing
biological condition of Rito Seco creek. This will provide information on baseline conditions of
the stream for Battle Mountain Gold Company's proposed San Luis mine.
Data were collected at three sites along Rito Seco creek (Fig. 1) upstream of, adjacent to and
downstream of the proposed Battle Mountain San Luis mining complex. Site l was located
L approximately 0.5 miles upstream o£ the old El Plomo mine. The site was just downstream of
the San Luis town park. Riparian vegetation was abundant at this site, consisting of willows,
alders and conifers. This reach of stream is relatively steep (Table I), with substrate composed
of rubble, gravel and sand. Aquatic plants were absent from the stream channel.

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FIGURE 1:
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- Stream
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Miles
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Study area on Rito Seco creek, Costilla County, Colorado.
1
Luis