ERDC researchers assessed the Millennium Pipeline Project on three topics related to its proposed crossing of Lake Erie: 1) the potential for pipeline damage by ice scour, 2) adequacy of the sampling program to identify contaminated sediments, and 3) adequacy of the modeling for turbidity and sediment deposition resulting from pipeline-trench excavation. Inclusion of additional scour data and re-analysis resulted in a 25% increase in the estimated 100-year scour depth near the U.S. shore and a consequent increase in the design trench depth by about 20%. Question-answer exchanges resolved ERDC concerns regarding sediment sampling and turbidity/ deposition modeling.