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Section 780.11 (b) Continued. to prevent excessive dust. The primary and secondary crushers and the sample building at the Energy Tipple No. 2 have bag houses installed to control coal dust emissions. A stacking tube is also used to miniwize coal dust emissions at the 100,000-ton crushed coal stockpile. The air quality control measures at the coal crushing, handling, and load-out facility of Energy Tipple No. 2 have been approved by the Colorado Department of Health, Air Pollution Control Division. The Energy Tipple No. 1 was constructed in 1962 for use when the mining operations were initiated. This facility was idled in 1974 for stand-by use after crushing operations began at the much larger Energy Tipple No. 2. Since 1974, the Energy Tipple No. 1 has been maintained for emergency or supplemental use only. The crushing screening, and conveying operations at the Energy Tipple No. 1 are • equipped with a water spraying system. Energy Fuels employs a dust suppression program for haul roads and other unpaved roads which primarily involves periodic watering. During the drier months of the summer, specifically July, August, and September, the water trucks will wet down the reads which are being utilized a minimum of 2 or 3 times per shift. In addition to the periodic watering, a chemical dust suppressing agent known as "Coherex" is used during the summer on the main haul roads. Drilling and blasting are conducted with regard for the control of fugitive emissions and disturbance is kept to a minimum to avoid exposed surfaces. Reclamation is commenced as con tempurai~eously as possible to reduce the potential for blowing dust. Air pollution cocitrol plans and techniques are discussed in greater detail in Section 780.15. Section 780.12 Operation plan: Eristing structures. (a) Each application shall contain a description of each existing str::cture proposed to be used in connection with or to facilitate the 780-30