Laserfiche WebLink
3.0 DISCUSSION <br /> The results of �he survey, in terms of changes in elevation <br /> 9 ► <br /> are presented in Tab a 1. This table presents the total <br /> subsidence since the baseline survey performed in August 1981 as <br /> well as the changes 'n elevations since the last survey in August <br /> 1983. <br /> The locations o the subsidence monitoring points are shown <br /> on Map MCR-84-03-01. This map illustrates the extent of <br /> underground development entries and mined-out areas for <br /> Mid-Continent Resources, Inc . ' s, Coal Basin Mines No . 1 , 2, 3 , 4 <br /> and 5. The amount of extraction since the August 1983 survey is <br /> also illustrated. <br /> Because of snow cover , it was impossible to locate subsidence <br /> monitoring points MC and MC-9. Monitoring point MC-3 was buried <br /> beneath a snow field in a topographic bowl at the base of a steep <br /> escarpment. Monitoring point MC-9 was buried beneath a cornice of <br /> snow along the crest of Huntsman Ridge. <br /> The survey results indicated that monitoring points MC-2, -4 , <br /> -5 and -6, located above or adjacent to mined-out areas, continued <br /> to subside. Monitori g point MC-8 , located above unmined coal <br /> reserves, remained stable. <br /> -2- <br />