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 56: Unidentified Anomaly 56 Summary Table Anomaly Identification Unidentified Remedial Impact Dredge and Cap NRHP Eligibility Unevaluated Recommendation Anomaly Dataset Side Scan (2005) No Magnetometer (2005) 538 Side Scan (2010) No Sector Scan (2010) No ROV (2010) No Diver Observations 6/23/11 Diver Videography No Maps/Charts No Aerial Imagery No Historic Accounts No Research Results Anomaly 56 was a low amplitude magnetic anomaly. A-56 is co-located with CRE’s 2005 digitized magnetic anomaly #538 which possessed a 60nT dipolar signature. Assuming a distance (range) of 7 to 16ft (2 to 5m), the ferrous mass of this anomaly might be 22 to 551lb (10 to 250 kg). There were no side scan sonar contacts in the vicinity of this anomaly. Diver verification in 2011 produced small pieces of modern garbage and several buried anomalies, but nothing that could be conclusively identified. The buried metallic anomalies could not be found with modest hand probing, so they were left unresolved. The magnetic and dive verification data suggest that A56 is likely isolated ferrous debris. Recommendations LCMM recommends no further work for A56. 129
FINAL Phase IB Underwater Archaeological Resources Report for Onondaga Lake Superfund Site Anomaly 57: Wooden Barrel with Iron Hoops Anomaly 57 Summary Table Anomaly Identification Wooden Barrel with Iron Hoops Remedial Impact Dredge and Cap NRHP Eligibility Unevaluated Recommendation Anomaly Dataset Side Scan (2005) No Magnetometer (2005) 546 Side Scan (2010) No Sector Scan (2010) No ROV (2010) No Diver Observations 6/23/11 Diver Videography No Maps/Charts No Aerial Imagery No Historic Accounts No Research Results Anomaly 57 was diver verified in 2011 and is a wooden barrel with iron hoops (Figure 94). The barrel lid was brought to the surface for documentation and re-deposited. Recommendations LCMM recommends no further work on A57. Figure 94. Anomaly 57, wooden barrel lid (LCMM Collection). 130
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