Hugh Thorson COnstruction Co. No description specified. 1-2 (2 Records) Documents Salvage Excavation of Outlying Areas of the SHadow Hills Sie, SBA-1820, and Test Excavation of a Portion of SBA-1855 (1986) Salvage Excavation of Outlying Areas Of the Shadow Hills Site, SBA-1820, And Test Excavation Of a Portion Of SBA-1855 (1986)