1. Effect of Burlington Mine Pond on Metal Concentrations in Little James Creek Joe Ryan University of Colorado Lefthand Watershed Oversight Group December 6, 2005

2. Denver Public Library X-2579 Denver Public Library X-61529

20. EPA Data  Zinc  dissolved  aquatic life criteria, acute and chronic: 50-100 mg L -1 (depends on hardness)

21. Our Data – Zinc, April 2003

22. Our Data – Zinc, June 2003

23. Summary  Similar results for other metals  copper, lead  Burlington Mine cleanup  reduced erosion, contact with waste rock  pond still flowing  no clear improvement  High concentrations downstream  Burlington Mine pond still a source  Emmet Mine probably bigger source

24. Lefthand Canyon Rd Sawmill Rd California Gulch Rd White Raven Mine Captain Jack Mine and Mill Big Five Tunnel Lefthand Canyon Rd  To Ward

25. Tina M. Winwood A.P. & T.S. Brown Toy L.B. & Lucian S.F. Bird Dog Properties LLC Bird Dog Properties LLC Bird Dog Properties LLC Bird Dog Properties LLC Bird Dog Properties LLC Bird Dog Properties LLC Peter P. Brady Ameriquest Mortgage Co. Captain Jack Mining Ltd. David E. Van Dyke Captain Jack Mining Ltd. Bird Dog Properties LLC Bird Dog Properties LLC Boulder County W. Andrew Ketchin Captain Jack Mining Ltd. AR Tiedemann & RL Vogel J.M. & M.J. Shaffer W. Andrew Ketchin J.M. & M.J. Shaffer WV Mickey Jr. & R Patrick Boulder County AR Tiedemann & RL Vogel Boulder County Grover E. Burdine Boulder Co. U.S. Govt. U.S. Government A.P. & T.S. Brown Boulder County