The Kaketo Dam was constructed in 1934 with stone masonry and lime mortar. It has an 855 m long non-overflow section which was leaking at many points on the downstream face. Over the period due to ageing, the lime mortar was washed away from the masonry joints, leaving voids in the body of the dam. This caused water to seep through.
To arrest the seepage and to consolidate the masonry, average drilling of 20 m deep and grouting of 2 m width in descending order, was carried out by percussive drilling through primary and secondary holes.
Before grouting operations, pointing in rich cement mortar was done on the u/s and d/s face of the dam. The holes were drilled in two rows, 2 m apart, with a staggered spacing of 6 m centre to centre. The seepage was controlled within the permissible limit.
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