Ratify Contracted Emergency Work - EPO Notre Dame Ave. & Howard St. Repair - Selge Construction Co., Inc.

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INTER-OFFICE MEMORANDUM DEPARTMENT OF PUBLIC WORKS DIVISION OF ENVIRONMENTAL SERVICES TO: Members of the Board of Public Works Michael Schmidt, Assistant City Attorney Public Works Theresa Heffner, Clerk FROM: Jacob M. Klosinski, P.E., Assistant City Engineer SUBJECT: Emergency Repair – Notre Dame and Howard Street Sewer Repair (PO-0018540) Agenda Request – Ratify Emergency Repair Contract DATE: October 18, 2022 The Department of Public Works Division of Engineering, Utility and Street/Sewer teams contacted Selge Construction Company to assist with emergency repairs following observance of a cavity and undermining at a manhole at the intersection of N. Notre Dame Avenue and Howard Street. Description of Collapse and Repair The break in the 18-inch vitrified clay sewer pipe (c.1914) was on the bottom of the pipe 8-feet south of the brick manhole structure and 2-feet north of the water main on Howard Street. Once it was identified that the repair could not be completed without removing a section of 6-inch water main, relocating an overhead electrical wire, and adjusting the excavating to avoid an active gas main, the excavation plan was modified plans to facilitate the repair. To void the brick manhole being compromised during excavation work, City Engineering made the decision to replace the structure, a broken section of clay pipe, and reconnect storm and sewer leads. Sewer pipe reaches from the north and west as well as storm pipes at each quadrant of the intersection were reconnected. A section of 6-inch water main was removed and reinstalled. Water Works supplied a isolation valve to accommodate the work and avoid customer impact. NIPSCO identified the active and abandoned gas lines along Notre Dame Avenue. AEP also relocated a section of lighting cable that carried from the northeast corner of the intersection to the southwest corner of the intersection to allow safe usage of excavation equipment. During construction a section of abandoned railroad tracks and ties had to be removed to accommodate trench box installation. The abandoned ties, containing creosote, were taken to a landfill in accordance with required rules and regulations. Asphalt pavement patching was completed by the contractor since City crews were not available to assist with the patching and repair. City’s repair estimate was $50,000. Final repair cost for the work was $73,261.47. For questions, contact Jacob M. Klosinski (Ext. 9496) at the Division of Engineering.