Top Guard Truncated Domes for FDOT T2480 in Jasper (Hamilton County) June 2, 2014 Posted by on June 2, 2014June 6, 2017 Top Guard yellow detectable warnings installed +/- 530 sq.ft. along US 41 from CR 6 to US 129 in Jasper (Hamilton County). FDOT contract T2480. Anderson Columbia as prime.