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4.0 SURFACE WATER <br />Trapper Mine monitored one stream site, sixteen active NPDES discharge sites <br />and two springs associated with NPDES sites during 1997. The stream site is Flume Gulch <br />(S1). Flow was observed at NPDES sites 001, 002, 005, 006, 008, 010, 011, 013, 015 and <br />017 in 1997. Discharge below the Coyote Dam (005) and East Pyeatt Pond No. 3 (011) <br />in 1997 was from springs only with the exception of a few surface discharges from their <br />respective dams. The Coyote Spring is below the Coyote Dam outfall but above NPDES <br />site 005. Baseline stream site East Pyeatt (S3) is also NPDES site 011. Most sites were <br />visited weekly throughout the year. Sites NPDES 003, 009, 012, 014, 016 and 019 did not <br />discharge during 1997. No semi-annual samples were collected from NPDES sites 015 and <br />017 because there was no discharge from either site when the samples were collected. <br />Maps No. 2-1 through 2-3 show the locations of these surface-water sites. <br />4.1 SURFACE-WATER FLOW <br />Flow measurement and sample was taken once during 1997 for Flume Gulch site <br />S1. The 1997 flow data tabulated in Appendix C in Table C-1 is an instantaneous rate <br />associated with awater-quality samples. Continuous flow information was also collected <br />at the NPDES sites with stage recorders. <br />Figures C-1 through C-6 present the instantaneous flow versus time for the <br />Trapper NPDES sites for 1997. Flow during the weekly sample for the last week in April <br />was very large at 1800 gpm. High flows existed several times at NPDES 002 during 1997 <br />(see Figure C-2). Flow was very limited at NPDES sites 006, 013, 015, 017, 008 and 010, <br /> <br />4-1 <br />