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NPS Form 10-900-a (Rev. 8-86) Wisconsin Word Processing Format (Approved 3/87) United States Department of the Interior National Park Service National Register of Historic Places Continuation Sheet Schooner-barge PRETORIA Section 7 Page 2 Ashland County, WI The broken-up nature of the hull is attributed by local divers to later salvage of the wreck, some of it occurring rather recently. One reported incident of modern salvage included the removal of the Pretoria's anchor chain, using clam dredge equipment; the anchor chain is now to be seen draped around Bayfield as ornamental fencing. The archeologists were particularly impressed by the massive scale of the vessel's construction and the size of the wrecksite. Because the Pretoria was one of the largest wooden vessels to sail the Great Lakes, archeological documentation represented a special challange. The sheer size of the main hull and debris field (reportedly, debris from the wreck and subsequent salvage lies from a quarter to a half-mile around the main hull) poses a serious problem of scale to underwater archeologists using manual mapping methods. Moreover, the wreck depth of fifty-four feet limits bottom time for divers. And the remoteness of Outer Island (over thirty miles from the base at Bayfield) presented logistical problems for extended field operations. Additional field work on Pretoria was conducted in 1991, including photography, video, development of a base site plan, measured sketches, and visual reconnaissance away from the main hull. The notes, sketches, and photographs generated in 1990-1991 were used for planning full-scale survey work on the site in 1992. In August, 1992, a team of four SHSW archeologists aboard R/V Dawn Treader, and two volunteer divers aboard a private boat, relocated the wreck of the Pretoria and began the final push to complete survey-level documentation of the site. Documentation of the Pretoria site was confined to the main hull, with debris field documentation to be completed at a future date. It is probable that remote sensing equipment (such as side-scan sonar or a magnetometer) will be needed to locate scattered elements of debris, as visual survey by divers would not be time or cost-effective. Site Description The Pretoria's bottom, consisting of the keelson assembly and bilge, measures 315 feet in overall length, and lies bow to the