The paper presents the results of tests and calculations aiming at the determination of the influence of changes of the values of municipal wastes cohesion on the values of safety factor calculated with the use of Fellenius method. The described works were performed for the reclaimed dumping site for wastes other than dangerous and neutral in Brzozów. The analysis was based on the own research, calculations and the existing documentation concerning the dumping site. The computational part of the work included checking the slopes stability in two chosen cross-sections. The possibility of an external load on a surcharge coming from a compaction machine was also assumed. Depending of the assumed cross-section and the calculation scheme, it was stated, that even for the cohesion equal 22 kPa the calculated safety factor indicates the risk of stability loss.

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