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• • • An alternative approach to changing the fill con- figuration would be to initiate a program of careful moni- toring and observation of the fill. The ptLrpose of such a program would be to obtain more data on the ground water and stability conditions and to provide a reliable warning system that would be capable of detecting a potential failure well ahead of time. It is evident from the analyses that ground water con- ditions are of crucial importance for the stability of the fill. Although ground water was to be found below the fill during the time of our investivation and shortly afterward, it cannot be excluded that it might rise during the periods of increased precipitation or during the spring season of a fast snowmelt. On the other hand, if appropriate surface drainage measures are implemented and any rise of ground water becomes impossible, remedial measures could deal only with potential surficial failures as indicated by the analyses. The only piezometer that has been installed in Boring B-3 close to the crest of the fill is not sufficient for such proposed monitoring; it would be necessary to install additional piezometers, or better, pore pressure measurement devices with a short response time; they would have to cover the critical parts of the crushing and screening level fill. LJe feel that an additional monitoring system should be implemented if it were decided to follow this alter- native; we would recommend to install several inclinometers within the fill. Inclinometers are sensitive devices that are installed in vertical borings; they will indicate any lateral deformations within the mass of tlTC fill. They would he capable of veriFying tine probability of a shallow or deep- seated fail.lr~: they w~nild pray idc valuabe i;iiormation on the - _3 - GE6NYDY0 CONSULTING.INC.