Appendix 58 Flathead Forest Plan Amendment 21, Appendix IV Subbasins and Geographic Unit Descriptions
Appendix 58 Flathead Forest Plan Amendment 21, Appendix IV Subbasins and Geographic Unit Descriptions As part of its planning process, the Flathead National Forest developed the following subbasin and geographic unit descriptions and priorities. The forest is divided into seven “subbasins”: Flathead Lake, lower Flathead, North Fork Flathead, Middle Fork Flathead, South Fork Flathead, Swn, and Stillwater. SWAN SUBBASIN 469,278 acres (all ownerships) 282,462 acres (Flathead National Forest land only) A. CHARACTERISTICS OF THE SUBBASIN The Swan Subbasin is bounded by the Swan Range to the east, the Mission Mountains Range to the west, and the Clearwater Divide to the south. This subbasin encompasses the entire Swan River system including Swan Lake. The main valley is roughly 65 miles long and 9 miles wide, narrowing to about one mile in width along Swan Lake. Elevations range from slightly under 3,000 feet to over 9,000 feet. Upper timberline is at approximately 7,000 feet. The subbasin is roughly bisected by the Swan River, which flows generally north to where it enters Flathead Lake. Land ownership in the subbasin is mixed. Approximately 60 percent of the land is managed by the Flathead National Forest (a large part of this is designated or proposed wilderness), 20 percent by Plum Creek Timber Company, 10 by the Swan River State Forest, and 10 percent by other, mainly private, landowners. The communities of Bigfork, Ferndale, Swan Lake, Salmon Prairie, and Condon are located within the subbasin. A large portion of the subbasin is covered with montane and subalpine conifer forests supporting over a dozen species of conifers.
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