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-2- The impact of maximum subsidence (i.e., 6 foot general Lowering of. the land surface and tension cracks) on this ephemeral drainage is discussed in the Flydrology portion of this TA. Based on [his assessment, it is helieved [hat material damage will not result, but some diminn[ion of this drainage could occur (i.e., foreseeable uses of water from this drainage could he diminished) by means of water entering tension cracks and/or being stored in ponds caused by subsidence "holes." [dith respect to compliance with 30 CFR 784.20 and 30 CFR 817.121, 811.122, 817.124, and 817.126, Che plan has done a marp,inal .job in demonstrating conformance. More specifically: . 784.20(a) -"a detailed description of the mining method..." is included in the plan; . 784.20(6) -"a detailed description of measures to he taken to prevent subsidence from... lessening the value or resonably foreseeable use of the surface incluriing: (1) [he anticipated effects of planned subsidence - not included in plan; (2) Measures taken to reduce subsidence." -not included in plan; (3) Measures to be taken on the surface to prevent material damage or lessening of the value or reasonably foreseeahle use of Che surface -only a nominal subsidence mnn~tori ng plan is pro posed; . 784.20(c) -detailed description of measures [n be taken to miti.g ate effects nn surface which may occur-not included in plan; . 784.20(d) - detailed description of measures to he taken to determine effects to surface which result from suhsirtence - nominal subsidence monitoring plan is included in plans; 817.122 - Puhlic Notice - the U.S. Forest Service has concurred with approval to Ch is mudifica[ion (with a stipulation for necessary subsidence monitoring); 817.124 - Surface Owner Protection - not arldressed in plan; 817.124 - Buffer 7.ones - not applicable.