|PANORAMIC Photo By trinityalpsphoto|
This THP is about 4 miles NE of Weaverville, CA and Highway 299, and about 4 miles NW of Lewiston, CA at an elevation of 1,900 to 3,500 feet. Sierra Pacific Industries is planning a mostly clearcut tractor and cable logging operation on steep and unstable slopes in Douglas fir, ponderosa pine, white fir, sugar pine, and incense cedar forests. The THP area flows into the Trinity River which is listed as an impaired watershed for sediment and siltation. There are loose granitic soils throughout the THP area, and dormant landslide terrain sites (steep headwall swales/debris slides) in units 4650, 4670, 4671, a cutbank failure off a seasonal road in unit 4814, and an unstable area at the head of a class II (mid sized) watercourse in unit 4687. SPI is planning to use ground based equipment (feller bunchers) in areas designated for cable logging, and use ground based equipment on existing skid trails with slopes over 50% grade that have a high erosion hazard. They also are planning to use an existing tractor road within a class III (intermittent) watercourse in unit 4809, and use an existing tractor road within a class II (mid sized) watercourse in unit 4710. Ten road drainage sites are planned for work including rocking, dip construction, ditch cleaning and culvert repair/replacement. Slender false lupine was found within units 4655, 4676, 4694, 4702, 4769, 4796, 4804, 4814, 5114 and 5120, Glaucous tauscia was found within units 4676, 4687, 4694, 4702, 4705 and 5120, and Klamath mountain catchfly was found adjacent to unit 4808. There are 6 spotted owl nesting territories within 1.3 miles of the THP area.