Jasjitsingh Bhatia, who possesses the license of two sand mines, had filed a complaint in this regard.
Accordingly, Kolavkar had issued a notice to Bhatia accusing him of excavating sand from unauctioned Satona Ghat area.
Then Kolavkar demanded a bribe of Rs 2 lakh for scuttling the inquiry and not taking any action against Bhatia and another contractor.
ACB team led by inspector Shubhangi Deshmukh caught him red-handed yesterday.