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Mr. James Pendleton May 5, 1983 Page 3 • 3. The results of a thorough geological reconnais- sance of the surface overlying the affected underground workings, designed to determine any possibly associated surface geological phenomena and to relate subsurface features to surface topography; The surface overlying the affected underground workings was found to be either disturbed by construction, or densely vegetated with no out- croppings. As a result, the geological recon- naissance was extended to the full five year permit area. A photogrammetric study was carried out on the five year permit area. The results of this study are shown on Enclosure No. 4. The linear fracture analysis was supplemented by determining the orientations of joints in a number of locations (See Enclosure No. Sy. Rose diagrams were constructed showing linear frequency and jointing distribution within the five year permit area. Corresponding rose diagrams were also developed for the affected underground workings; these diagrams have also been broken down by immediate roof lithology. • It should be noted that there appears to be an unusual negative correlation. That is, the diagram of the fractures in sandstone roof fits a void in the diagram which shows joints in the five year permit area. The combined fractures and joints seen in the affected workings appear to correlate with one of the five sets of linears which were located by aerial photogrammetric methods; however, this may be merely a coinci- dence. 4. The results of monitoring conducted to detect any potential movement or re-orientation of the fracturing encountered; Our current monitoring program consists of two types of measurements. The first is survey in which several points designated by the letter "M" on Enclosure No. 1 are monitored by measuring the distance separating two survey spads in the roof. There has been no detectable movement to date. The second method of monitoring is a routine visual inspection to be certain that no timbers or beams are showing signs of weight which may • be attributed to movement. Several areas are examined each week, and no unusual movement has been noted.