La Grande-4 Airport — La Grande-4, Canada

La Grande-4 Airport, coded YAH, is a remote facility in northern Quebec built to support the massive James Bay hydroelectric project developed by Hydro-Quebec. This airstrip specifically serves the La Grande-4 generating station, one of several major dams constructed along the La Grande River. Workers, engineers, and supplies moving to and from this isolated northern outpost rely heavily on air transport given the vast distances and limited road infrastructure in the region. The airport's existence underscores the scale of Quebec's hydroelectric ambitions, which reshaped the province's energy landscape throughout the late twentieth century. YAH remains primarily an industrial support airfield rather than a public transportation hub, reflecting its purpose-built origins tied entirely to hydroelectric infrastructure development.