Performance study of a machine foundation for 11,000 cpm, high speed, synthesis gas compressor has been carried out to verify the maximum amplitudes of vibrations determined from the dynamic analysis. The frame type concrete foundation rests on a group of concrete piles. The concrete piles are of 0.45 m dia, 17 m long, driven cast-in-situ. The paper reports the difference in the observed and computed amplitudes which may be due to the interaction of the neighbouring foundation on which the another compressor is running simultaneously
