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. CENTRAL CITY MASTER DRAINAGE STUDY 38 1 1 1 1 1 1 1 1 1 1 1 1 1 I I' 1 SECTION 9. INTER-AGENCY COOPERATION The author meet with the U. S. Environmental Protection Agency Superfund Project Manager for the Quartz Hill site. The EPA is investigating remedial actions to clean up acid mine leakage from Quartz Hill (which forms the south side of the Nevada Gulch basin) and run-on and runoff carrying heavy metals from the Free Parking lot. They are also investigating stabilizing the slopes of the Free parking lot, which is composed of mine tailings. Their project is completing the public comment phase and they will be making decisions on remedial action methods soon. The EPA project is mentioned in this report to identify a potential source of funds for Nevada and Spring Gulch tailing and slope stabilization. The goal of Central City to reduce sediments and debris clogging the drainage system and depositing on streets (see Appendix A) can largely be achieved by the same methods the EPA will employ to keep acid and heavy metals from infiltrating North Clear Creek. Cooperation with the EPA would maximize the benefit to both the ,federal and local government. Because of the dual benefit, the Central City could have a more active role in the planning and design of remediation measures. The EPA's schedule is generally compatible with Central City's in that the design phase will be commencing in the next few months. Due to the expense of Nevada and Spring Gulch tailing and slope stabilization noted in Section 6, and due to the need to coordinate Central City's drainage and sediment control efforts with the EPA, the cost of tailing and slope stabilization is not included in the economic analysis. Its priority as a construction item is given, however, in Section 8. .' ~ A HydroDynamics Incorporated