Represented the construction company engaged in a multibillion dollar Deep Tunnel and Pollution Abatement Program to repair and expand the Milwaukee metropolitan area sewers, wastewater conveyance and treatment system. We represented the client in connection with contractor claims arising out of the construction of several deep shafts and the main conveyance and storage tunnel for the system some 300 feet below the City of Milwaukee. Known as the North Shore Tunnel, that tunnel was approximately six miles long and 32 feet in diameter. It was mined with a tunnel boring machine. Our representation included handling litigation in Wisconsin state court involving contractor claims for delay, inefficiency, defective design and differing site conditions arising out of slurry wall construction and ground freezing for temporary support of deep shafts. Those claims eventually were settled in mediation. The construction costs for the North Shore Tunnel eventually ran over the contract lump sum price. We led a team of industry professionals in an investigation of these cost overruns. As a result of that investigation, we determined that the program manager and design engineer bore a significant degree of responsibility for the cost overruns, due to inadequacies and deficiencies in the preparation of the plans and specifications. We then prosecuted a claim on behalf of our client in federal court against the tunnel’s program manager and design engineer for damages related to inadequate preparation of the plans and specifications. That claim also was settled after mediation, with a substantial payment to our client.