Complex sentence: The dam was started in 1961 under the Kallada Irrigation and Tree Crop development project with an original cost of Rs.13.28 crores and revised estimate of Rs.728 crores at the 1999 schedule of rates, the cost escalation reported is 5356 per cent.
Split into simpler sentences: The dam was started in 1961 under the Kallada Irrigation and Tree Crop development project with an original cost of Rs.13.28 crores. The revised estimate of Rs.728 crores at the 1999 schedule of rates made the cost escalation to be reported at 5,356 per cent.