 The Tenkarai irrigation tank has been reported to have been dug by Chezhiyan Senthanm (620 to 640 CE).A barrage to feed water into this tank from the Vaigai river is also attributed to this period.An inscription has been noted, which records the renovation of the "Kallanai" ("kall" -stone, "anai"-bund) during the period of Pandyan Srivallabhan.