1989 Map of Irvine Hill

About this map

Irvine Flats defines the eastern reach of this landscape, where the plateau meets a complex network of drainage systems on the Flathead Indian Reservation. Recorded in the late 1980s by the Bureau of Indian Affairs and USGS, this survey highlights the infrastructure of the local ranching or timber economy through an extensive system of numbered roads like I-5100 and I-5000 that weave through the high ground. Cultural landmarks are sparse but significant, including the Green Mountain Sch located near the base of Green Mountain. The terrain is characterized by deep ravines such as Gardeau Gulch and Oliver Gulch, which feed into major watercourses like White Earth Creek and Vinson Creek. A single Gravel Pit in the northeast corner near Black Gulch suggests localized resource extraction within the reservation boundaries during this era.