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Bolton Draw Bolton Draw is the major drainage which lies to the east of the permit area. A determination was made in the original permit approval that a segment of Bolton Draw was an AVF. This was based on geomorphic and water-availability criteria, and the potential for flood irrigation. Although there was some question as to the potential for flood irrigation and saline soil conditions in this area, a positive AVF determination was made for the segment of Bolton Draw between the stockpond in Section 11, TBN, R78W and the confluence with the Canadian River (see Exhibit 2, Addendum 1). Alluvial Palley Floor Findings The effects of mining on the two identified AVF's along the Michigan River and Bolton Draw were evaluated by the Division at the time of original permit approval. It was determined that no mining-related impacts would occur on the Michigan River AVF because of the limited hydrologic relationship and distance between areas. Bolton Draw would receive drainage from the mine area, but water quality impacts associated with leaching of spoils were determined to be insignificant. Additionally, no AVF areas would be physically disrupted by mining, and no change in the land use within the AVFs are proposed or anticipated. Based on the preceding discussions, and pursuant to Rule 2.06.8(5), the Division makes the following findings regarding the Michigan River and Bolton Draw AVFs in the vicinity of the Canadian Strip Mine: 1. The mining and reclamation operations will not interrupt, discontinue, or preclude farming on alluvial valley floors. 2. The mining and reclamation operations will not materially damage the quantity of water in surface or underground systems that supply those alluvial valley floors or portions of alluvial valley floors. 3. The mining and reclamation operations will be conducted in accordance with Rule 4.24 and all other applicable requirements of the Act and Rules which apply to alluvial valley floors. 4. The mining and reclamation operations will preserve, throughout the mining and reclamation process, the essential hydrologic functions of the alluvial valley floor. IX. Assessment of Probable Hydrological Consequences of Mini As required by Rule 2.07.6(2)(c), the Division has made an assessment of the probable hydrologic consequences and cumulative effects of mining in the vicinity of the Canadian Strip Mine on the hydrologic balance, This assessment included a review of the Kerr Coal Company Marr Strip Mine, the Wyoming Fuel Company Canadian Strip Mine, and the Bourg Strip Mine, owned by Walden Coal Company, which lies approximately five miles north of the Canadian Strip Mine operation. All three mines lie within the Canadian River watershed. Probable hydrologic consequences of the reclamation operations to 12