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 35: Unidentified Watercraft Anomaly 35 Summary Table Anomaly Identification Unidentified Watercraft; NY Site Number 06740.012302 Remedial Impact Dredge and Cap NRHP Eligibility Eligible as Contributing Property to Syracuse Maritime Historic District Recommendation Anomaly Dataset Side Scan (2005) No Magnetometer (2005) 604, 632, 617, 256, 645, 660 Side Scan (2010) 6/3/10 Sector Scan (2010) 6/7/10 ROV Video Footage (2010) 6/10/10 Diver Observations Yes Diver Videography No Maps/Charts No Aerial Imagery No Historic Accounts No Research Results Anomaly A35 represents the remains of a watercraft that could not be conclusively identified due to its buried condition (Figure 58). The site was examined in June 2010 with sector scan and side scan sonar which yielded no returns suggesting the presence of a submerged cultural resource. The underwater videography recorded by the ROV showed a scatter of timbers which LCMM staff were unable to conclusively identify. Due to the lack of sufficient data to assess the nature and potential significance of the site, the anomaly was investigated by archaeological divers in October 2010. This inspection revealed the site to be the largely buried remains of a watercraft of unknown origin. The site lies in approximately 4 feet (1.22m) of water, with an extant length and beam of 64 feet (19.51m) and approximately 14½ feet (4.42m), respectively. Very little of the site is exposed; however, the visible remains suggest that the bottom 2 to 4 feet (.61 - 1.22m) of the vessel is preserved under the lake bottom. The principal visible features include stern framing and planking, deadwood, keelson, sternpost, and a wooden hogging truss. The vessel’s stern is the most exposed portion of the remains consisting of a sternpost, frames, planking and deadwood. An iron rub rail was noted on the exterior of the port side at the stern. The planking goes from outboard of the frames to on top (interior) of the sternpost, which suggests that the sternpost is preserved to its original height. The stern post is vertical with an iron plate on the side and a gudgeon for securing the rudder. The sternpost is reinforced on its interior side with deadwood. The port side of the stern has five frames while the starboard side does not have any. The framing is light with moulded and sided dimensions of 3 inches (7.62cm). The form of the stern was difficult to determine given the paucity of exposed timbers, however, the shape is believed to be scow-like. The boat amidships had two 10 foot (3m) long longitudinal beams which were angled downward toward the stern with the bow end about 1 foot (.3m) above the lake bottom. These beams are believed to be the remains of a wooden hogging truss. The exposed remains at the bow consist of a 20 foot (6.1m) run of the keelson and the top of one frame. Probing in the bow showed the remains to be buried below only 6 to 12 inches (15 to 30cm) of sediment. The maximum length of the remains was 64 feet (19.51m); however, the stem was not located thus the true length of the boat is unknown. There is a large coil of wire rope amidships. The paucity of exposed remains do not allow for a conclusive identification of the vessel type. The two candidate boat types are a small steamer (with machinery removed) or a canal boat. The beam 79
FINAL Phase IB Underwater Archaeological Resources Report for Onondaga Lake Superfund Site dimension of 14½ feet (4.42m), as measured between the two hogging truss timbers is suggestive of a boat designed to fit inside the Erie Canal locks between 1825 and 1862. LCMM researchers, however, do not have confidence that the distance between the hogging trusses represents the vessel’s true beam since the sides of the hull were not located. The length of the remains are not reflective of the boat type since the bow is not preserved, and thus the true length is unknown. 80
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