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Daniel I. Hernandez 4 October 19, 1992 The Annex No. 1 was an underground mine with portals located opposite the Corley No. 6 portals, near the cinder block shop. At the time of the field inspection, the investigator observed 8 subsidence holes and attributed them to the entries of this mine. The Corley No. 6 underground mine portals are located north of the refuse area. The investigator indicated that the portals were concealed by spoils and that dumps from the mine, though scattered, were primarily concentrated northeast of the tipple. The Canon Chief Strip Mine was operated by Weckerling, who left spoils scattered in the general tipple area along the road that exists between County Road 15 and Ray Curby's current house. The investigator indicated that due to surface strip mining, no sign of the Black Diamond underground portals could be found. The figure on the inspection report shows an area identified as "scattered dump, timbers and trash" extending 350' by 315' on both sides of a roadway identified as County Road 29X. The investigator's comments state that "no dumps remain from the underground workings of the Canon Black Diamond Mine. However, debris from the dumps is scattered throughout the site on both sides of County Road 29X." The Pioneer Canon #2 was an underground mine east of the Double Dick. The investigator felt that the portals from Pioneer Canon Mine were also concealed by spoils. The Double Dick underground mine had two portals. The northern portal was concealed by spoils from strip mining. The southernmost shaft was 35' in diameter at the surface and the investigator reiterated the comment about the Pioneer Canon #2 description about debris being scattered throughout the site. This area corresponds to the coal waste dumped in the drainage between the tipple and the Orphan Pit. One final piece of information was reviewed. The Colorado Geological Survey had in 1971 put together an orthographic aerial composite of the 7.5 minute USGS Rockvale quadrangle in 1971. This photo showed black waste piles existing northeast of the tipple, and in the drainage near the Black Diamond Mine, and showed the shale pile near the tie- across road to County Road 15 existing at that time as well. Conclusion In light of this latest research, I recommend the following course of action regarding the reclamation of mining waste in Section 24: 1. Remove only the coal waste piles that lie west of the tipple pond; 2. Scrape and seed the haul road through the drainage between the tipple area and the Orphan pit;