Phase 1B Underwater Archaeological Report for the Onondaga ...

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FINAL Phase IB Underwater Archaeological Resources Report for Onondaga Lake Superfund Site Anomaly 4-1: Dump Scow Anomaly 4-1 Summary Table Anomaly Identification Wooden Dump Scow; NY Site Number 06740.012294 Remedial Impact Dredge and Cap NRHP Eligibility Eligible as Contributing Property to Syracuse Maritime Historic District Recommendation Anomaly Dataset Side Scan (2005) 0308 Magnetometer (2005) 743, 777 Side Scan (2010) 6/3/10 Sector Scan (2010) 6/4/10 ROV Video Footage (2010) 6/9/10 Diver Observations No Diver Videography No Maps/Charts Yes Aerial Imagery Yes Historic Accounts No Research Results A4-1 is an edge-fastened scow barge which is preserved up to the deck level, although the deck is no longer present. The vessel is 78 feet (23.77m) long and 27 feet (8.23m) wide. A wreck marker appears in the vicinity of A4-1 on a 1942 navigational chart (see Figure 37). The barge rests in shallow water just off shore, and adjacent to another barge, A4-2 (Figure 43, Figure 44 and Figure 45). The archaeological data suggests that the barge’s build date is in the early twentieth century. The uppermost portions of the vessel are just below the water’s surface. The vessel’s hull structure suggests that it is a dump scow. During the Phase 1B fieldwork, excellent surface visibility conditions allowed a detailed visual inspection of the barge’s interior structure. The barge’s principal extant members are its vertical, edge-fastened sides; longitudinal bulkheads; scow ends; transverse bulkheads; and framing. The barge’s interior is divided by two longitudinal bulkheads which run the length of the barge, compartmentalizing the vessel in to three sections. The hull is further split up by three transverse bulkheads which span the breadth of the hull. Three shorter transverse bulkheads which span only the outboard longitudinal compartment were also noted. Framing is placed every +/- 4 feet (1.22m) with futtocks approximately 6 inches (15.24cm) moulded and sided. The two longitudinal bulkheads are about 8 inches (20.32cm) thick, the transverse bulkheads are 6 inches (15.24cm) thick, while the sides are only 4 inches (10.16cm) thick. The discrepancy between the thickness of the sides and bulkheads suggests there was considerable stress in the middle of hull and less at the sides. The original function of the barge could be deduced based on an examination of the structural components found in its middle longitudinal compartment. The compartment is bounded by longitudinal bulkheads, and the interior of each bulkhead has horizontally oriented cylinder shaped timbers paralleling the interior sides of each bulkhead. The cylinder shaped timbers have round sheaves attached to them. One compartment also has an angled timber wall running parallel to the bulkhead. These features suggest the barge is a dump scow with the central longitudinal compartment serving as an opening to the waters below. The angled wall is a dump door with the sheaves and cylinder shaped timbers used to control the opening and closing of the door. Dump scows were used to dump cargoes into water bodies. They commonly carried stone, garbage or dredge spoil. The adjacent barge (A4-2) and a barge to the north (A3) also appear to be dump scows, although the construction techniques of 63
FINAL Phase IB Underwater Archaeological Resources Report for Onondaga Lake Superfund Site the sites differ modestly. The presence of two dump scows (A4-1 and A4-2) next to each other suggests that they were abandoned here contemporaneously by the same owner. Figure 43. Aerial view showing barges A4-1 (left) and A4-2 (right). (courtesy Microsoft® Virtual Earth). Figure 44. Photograph of Anomaly A4-1 during a period of excellent underwater visibility (LCMM Collection). 64
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Phase 1B Underwater Archaeological Report for the Onondaga ...

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