Gillam is a town on the Nelson River in northern Manitoba, Canada. It is situated between Thompson and Churchill on the Hudson Bay Railw…Gillam is a town on the Nelson River in northern Manitoba, Canada. It is situated between Thompson and Churchill on the Hudson Bay Railway line. Many residents of Gillam are employed by Manitoba Hydro at one of their many facilities or support groups. Located within Gillam's boundaries, Hydro has four hydro dams—Kettle Generating Station, Long Spruce Generating Station, Limestone Generating Station and Keeyask —three HVDC stations—Radisson, Henday, and Keewatinohk—and a few support groups.