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Grapevine Creek Riparian Enhancement Biological Evaluation and Botany Specialist Report Table of Contents I. Introduction ........................................................................................................................................................................ 3 A. Background/Purpose and Need .......................................................................................................................... 3 B. Proposed Action and Description of Alternatives ....................................................................................... 3 Table 1 .......................................................................................................................................................................................... 4 C. Authorities: Direction and Policy ...................................................................................................................... 5 D. Categories of Botanical Species of Concern .................................................................................................. 7 E. Mitigations Built Into the Project Design to Protect Sensitive and Survey and Manage Botanical Species ............................................................................................................................................................... 8 II. Affected Environment .................................................................................................................................................... 8 A. Reference Materials and Methods ..................................................................................................................... 8 B. Project Area Habitat and Suitability for Sensitive Species ..................................................................... 9 1. Potential Suitable Habitat.................................................................................................................................... 9 2. Known Sensitive Plant Populations ............................................................................................................ 12 3. Field Surveys .......................................................................................................................................................... 12 4. Species Accounts .................................................................................................................................................. 12 III. Environmental Consequences ............................................................................................................................... 13 IV. Determination ................................................................................................................................................................ 13 V. References and Literature Cited ............................................................................................................................ 13 VI. APPENDICES ................................................................................................................................................................ 15 A. Appendix A-1. Sensitive and Endemic Botanical Species Habitat Suitability Pre-Field Assessment. ........................................................................................................................................................................ 16 B. Appendix B: Botany Specialist Report .......................................................................................................... 23 A. Forest Plan Endemic Species ......................................................................................................................... 23 B. Survey & Manage Vascular Plants, Bryophytes, Lichens, and Fungi ......................................... 24 Table 2. ...................................................................................................................................................................................... 24 Table 3. ...................................................................................................................................................................................... 25 C. Watch List Species ............................................................................................................................................... 26 D. Noxious Weed Risk Assessment .................................................................................................................. 27 Table 4. ...................................................................................................................................................................................... 30 2 Grapevine Creek Riparian Enhancement Biological Evaluation and Botany Specialist Report I. Introduction A. Background/Purpose and Need The Sims Fire Grapevine Creek Riparian Enhancement project proposes to improve riparian conditions within the Grapevine Creek drainage, accelerate the growth of riparian species and reduce fuel loads within the Grapevine Creek riparian reserves. Riparian restoration treatments are needed to: rehabilitate and reforest the Riparian Reserve along Grapevine Creek to restore essential ecological function to meet the Aquatic Conservation Strategy objectives of the Northwest Forest Plan (NWFP; 1994) reduce fuels within the Riparian Reserve to help protect the area from future uncharacteristic wildfires by making the area more resilient to fire provide continuous restoration treatments along the entire length of Grapevine Creek, in conjunction with other projects under the broader Sims Restoration Strategy The purpose of this biological evaluation (BE) is to review the proposed Grapevine Creek riparian enhancement project in sufficient detail as to determine whether the proposed action would result in a trend toward Federal listing of any sensitive plant, lichen, or fungi species, as designated by the Jul7, 2013 Region 5 Sensitive Species List (USDA, 2013) and 2001 Survey and Manage Record of Decision. Forest Service Manual 2672.4 (FSM 2600, 7/24/2009) directs that biological evaluations and assessments analyze impacts to endangered, threatened, proposed, or sensitive species. Survey and Manage, Forest Plan Endemic, Watch List, and noxious weed species are addressed in the Botany Specialist Report (Appendix B) following the biological evaluation. B. Proposed Action and Description of Alternatives The Sims Fire occurred in July 2004, and burned within the Lower Trinity Ranger District of the Six Rivers National Forest and the Hayfork Ranger District of the Shasta-Trinity National Forest. In 2012, the U.S. Forest Service received a settlement from PG&E for the 2004 Sims Fire that included the collective sum of $16,975,000 and the opportunity to restore ecosystem health to the Sims fire area. The Sims Fire burned approximately 4,030 acres across two national forests and private lands; just under half of these acres burned at high severity. Fire settlement funds received by the Forest Service for restoration of the affected area provide a unique opportunity to reverse ecosystem degradation, restore ecosystem health and resilience, rehabilitate damaged infrastructure, and prepare the impacted landscape for the effects of changing climates (Sims Fire Restoration Strategy, April 2014). The Sims Fire Restoration Riparian Enhancement Project #11 is located within the Sims Fire footprint and within the larger Sims Planning Area located in Trinity and Humboldt Counties (Figure 1). The project area includes parts of South Fork Mountain, the South Fork Trinity River, and Hyampom, located within Humboldt and Trinity Counties, California. The legal description is as follows: T.4N, R.6E. Sec. 19, 20, 29, and 30; T.4N, R.5E, Sec. 24 and 25 of the Humboldt Base Meridian. The project area is 108 acres of designated Riparian Reserve along Grapevine Creek represented by a maximum of 150 foot buffers on either side of the creek and tributaries. The Riparian Reserve area proposed for treatment ranges from approximately 1,378 to 3,448 feet above mean sea level. The main access road from Willow Creek is Forest Service Road 6N06 and from Hyampom, the main access road is County Road 311. 3 Grapevine Creek Riparian Enhancement Biological Evaluation and Botany Specialist Report Figure 1. The Grapevine Creek Riparian Enhancement project area. The proposed action and a no-action alternative are analyzed in detail in the following sections. Treatments proposed in each alternative and their associated acres are described in Table 1. ALTERNATIVE 1-PROPOSED ACTION Table 1. Proposed Action Treatment Summary TREATMENT METHOD OF IMPLEMENTATION SITE PREPARATION AND FUELS REDUCTION Cut all dead standing Hand-felling, lopping and scattering across project area trees (≤ 6 inches DBH) and hazard trees (6 – 14 inches DBH) Cut larger, hazard Hand-felling, leaving trees whole and unbucked on site snags (> 14 inches Large snags (> 16 inches DBH) may be felled towards stream channel DBH) Cut shrubs (> 1 foot Cut below the lowest live limbs, except when prevented by natural high) and obstacles intermediate or 4 Grapevine Creek Riparian Enhancement Biological Evaluation and Botany Specialist Report suppressed Maximum allowable stump height is 6 inches measured from the high hardwoods within 5 side of the tree/shrub. All live limbs below the cutting point shall be feet of leave trees removed Trees/shrubs shall be completely severed from the stump Thin codominant and Cut