During the last hundred years or so, deforestation and wind-water borne soil erosion have been steadily increasing and have now become the major environmental problems the world over. The man-made Sukhna Lake brought into existence through blocking of the water flow in the Sukhna Choe originating from these hills by raising of stone-cum-earthen embankments, is experiencing siltation over the years right from its completion in 1958. The present paper projects the geographical location of the lake with catchment area, the extent of water spread, changes in water storage capacity, vegetational aspects, as well as the extent of siltation in spatial frame work and the remedial measures taken over the time period of its existence for 43 years.