McMahon & Mann Consulting Engineering and Geology, P.C.

Lock O-7 Remediation

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Lock O-7 Remediation
Project Details
Location: Oswego, New York
Client: Bergmann Associates for New York State Canal Corp
Client Contact: Gregory L. Johnson, P.E., P.M.P. (585) 498-7845

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Lock O-7 is located along the right bank of the Oswego River, approximately 0.8 miles from Lake Ontario in Oswego, New York. It was constructed as part of the Oswego Canal system, which links Lake Ontario to the Erie Canal, between 1825 and 1828. The lock was reconstructed in 1917 to accept larger draft barges as part of the Erie Barge Canal improvements. Deterioration of the lock necessitated the installation of rock anchors in the east wall of the lock. 

McMahon & Mann provided geotechnical support during anchor installation and grouting. Initial drilling for the anchor installation revealed numerous fractures in the lock wall near a filling and emptying culvert that is within the lock wall. At this point, the project was halted and a rock coring program was completed to evaluate the nature of the fractures in the vicinity of the filling and emptying culvert. We used the information obtained during rock coring to develop a plan with the anchor installer to fill the holes with grout in a controlled manner that would limit the inflow of grout into the culvert. Divers in the culvert during grouting provided real time reporting of the grouting progress, allowing us to make adjustments to the grouting program as the work proceeded. 

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