Top Guard Truncated Domes for FDOT E3N73 in Blountstown (Calhoun County) June 14, 2016 Posted by on June 14, 2016June 20, 2017 FDOT contract E3N73. +/-23 locations (+/-260 sq.ft.) along SR 71 of Top Guard yellow detectable warnings installed in Blountstown (Calhoun County). Anderson Columbia as prime.