Leonard Ott No description specified. 1-3 (3 Records) Documents Phase One Cultural Resource Survey, Henze Tower (Rt-861A), Grundy County, Iowa (2001) Phase One Cultural Resource Survey, Schrier Tower (Rt-862C), Black Hawk County, Iowa (2001) Phase One Cultural Resource Survey, Tidman Tower (Rt-859A), Hardin County, Iowa (2001)