Siddhamalli Dam is constructed across Siddhamalli Odai in Kargudy Village of Udayarpalayam Taluk in Ariyalur District. Siddamalli Odai originates from the high lands of Sennivanam Village of Ariyalur Taluk and this Odai course confluence with river Coleroon near Anaikudy Village.
This reservoir benefits Ariyalur District. Udayarpalayam taluk is benefitted by this reservoir.
The construction of dam was started in the year 1982 and completed in the year 1988.
