This report provides a review available literature and data sources to determine segment boundaries within the Peace-Athabasca Delta (PAD) for the Athabasca River Delta channels. To support the segmentation analysis, and to determine the overwintering habitat potential within the major Delta channels, mapping grade bathymetric data were collected for several critical sites identified by the Instream Flow Needs Technical Task Group including: the Embarras River; Embarras River breakthrough channel to Mamawi Creek ( may also be known as Cree Creek); Mamawi Creek; Jackfish Creek (conveys Athabasca River water into Richardson Lake during flow reversals); Richardson River (conveys Athabasca River water during flow reversals); Fletcher Channel; Goose Island Channel; Big Point Channel; and, the area known as Big Eddy. The report contains a description of the field survey as well as its results.