MONTANA — A proposal to use thinning and prescribed burning to remove vegetation across portions of the Flathead National Forest bordering the Middle Fork Flathead River has gained wide attention for its inclusion of sensitive management areas in the project’s 67,536-acre footprint, which provides wildlife with critical habitat and is one of the region’s most popular havens of outdoor recreation. But even as conservation groups push for additional layers of environmental review, proponents of the project, including industry leaders, recreation advocates and residents, say it’s needed to reduce the risk of wildfire in a corridor brimming with untreated fuels that threaten infrastructure and communities on US Highway 2, as well as to support local timber mills and improve forest health. If approved, portions of the project would occur in recommended wilderness areas, although the scope of that work would be confined to whitebark pine restoration and tree planting with hand tools.