Copper Salmon Wilderness Legacy Roads Project
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Aquatic Biota Biological Evaluation/Assessment & Specialist Report COPPER SALMON WILDERNESS LEGACY ROADS PROJECT Prepared for the Environmental Assessment Rogue River-Siskiyou National Forest Powers Ranger District 42861 Hwy 242 Powers, Oregon 97366 Aquatic Biota Biological Evaluation for the Copper Salmon Wilderness Legacy Roads Project, RRSNF Page 1 of 29 I. TITLE PAGE Project Name: Copper Salmon Legacy Roads Project Location: 4th Field HUC Sixes 17100306 Coquille 17100305 5th Field HUC Sixes River 1710030602 Elk River 1710030603 South Fork Coquille 1710030502 6th Field HUC Upper Sixes River 171003060201 Upper Elk River 171003060301 Salmon Creek 171003050202 Watershed Analyses (WA): Sixes River (USFS 1997) and Elk River (USFS 1998) Land Allocation of Project Area: Wilderness Administrative Unit: Rogue River-Siskiyou National Forest (RRSNF): Powers Ranger District Prepared By: Karla Cottom, Fisheries Biologist, Powers Ranger District, RRSNF Reviewed By: Steve Brazier, Assistant Forest Fisheries Biologist, RRSNF Susan Maiyo, Forest Fisheries Biologist, RRSNF Document Date: August 29, 2012 Revised January 2, 2013 Aquatic Biota Biological Evaluation for the Copper Salmon Wilderness Legacy Roads Project, RRSNF Page 2 of 29 II. EXECUTIVE SUMMARY Biological Evaluation Background Information This report discusses the fisheries and aquatic dependent species of concern resources of the Copper Salmon Legacy Roads Project. The Biological Evaluation process (FSM 2672.43) is intended to conduct and document activities necessary to ensure Proposed Actions will not likely jeopardize the continued existence or cause adverse modification of habitat for: A. Fish species listed or proposed to be listed as Endangered (E) or Threatened (T) or Proposed for Federal listing (P) by the National Marine Fisheries Service. B. Aquatic species listed as Sensitive (S) by USDA, Forest Service. Threatened, Endangered, and Sensitive Fish Species (TES) In compliance with Section 7 of the Endangered Species Act (ESA) and the Forest Service Biological Evaluation process for TES aquatic species, the list of species potentially occurring within the project area was reviewed. Lists for the Rogue River-Siskiyou National Forest (RRSNF) and the Pacific Northwest Region (R-6) were reviewed in regard to potential effects on any of these species, critical and essential fish habitat by actions associated with the Copper Salmon Legacy Road Project. Pre- field and reconnaissance results are summarized in the table below and displayed on Map 1. Table 1. Potentially Affected Aquatic Species, Status, and Habitats Assessed (Pacific Northwest Regional Forester’s Sensitive Species List updated August, 2011) Species/Habitat Pre-field Review Field Surveys Existing Sighting or Habitat or Species Common name Scientific Name Potential Habitat Confirmed (Yes*/No**) (Yes*/No**) Threatened Species Oncorhynchus SONCC Coho salmon Yes Yes kisutch OC Coho Salmon O. kisutch No No S. DPS North American Acipenser medirostris No No green sturgeon Thaleichthys S. DPS Pacific eulachon No No pacificus Critical Habitat SONCC Coho salmon O. kisutch Yes Yes OC coho salmon O. kisutch No No Essential Fish Habitat Coho salmon O. kisutch Yes Yes Chinook Salmon O. tshawytscha Yes Yes Sensitive Species SONCC Chinook salmon O. tshawytscha No No PC chum salmon O. keta No No OC steelhead O. mykiss No No *Yes – The proposed project’s potential effects on these species will be further analyzed in this document. **No – No further analysis is necessary, and a determination of “No Impact” is rendered. Aquatic Biota Biological Evaluation for the Copper Salmon Wilderness Legacy Roads Project, RRSNF Page 3 of 29 Other Sensitive Species shown on the Regional Forester’s list as potentially found on the Rogue River- Siskiyou National Forest were addressed in the Wildlife Biological Evaluation including the Aquatic Mollusks. This project fits under the aquatic restoration program activity categories described in the Endangered Species Act Section 7 Formal Programmatic Consultation and Magnuson-Stevens Fishery Conservation and Management Act Essential Fish Habitat Consultation for Fish Habitat Restoration Activities in Oregon and Washington, CY2007-CY2012 Biological Opinion (2007 ARBO) for categories #5. Fish Passage Culvert and Bridge Projects; #17. Road Treatments; and #18.Removal of Legacy Structures. The following Project Design Criteria (PDC) as listed in the 2007 ARBO and stated later in the document after the alternative descriptions will meet the intent of the 2007 ARBO and the more stringent bridge project design criteria (PDCs) in the upcoming 2013 ARBO II, which will replace the 2008 version and our required consultation with NMFS for this project. III. DESCRIPTION OF THE PROPOSED ACTION(S) AND ACTION AREA WITH PROJECT DESIGN CRITERIA (PDC) A. Proposed Actions and Discussion of Alternatives The Powers Ranger District of the Rogue-River Siskiyou National Forest proposes decommissioning and recontouring up to 16 miles of previously closed roads, removal of legacy structures below the Blackberry Creek fish barrier culvert and replacement of the Blackberry Creek culvert with a bridge, 12 miles east of Port Orford, Curry County, Oregon. The project would also move up to 5,000 cubic yards of gravel about 800 feet to a location outside of the Wilderness. Funding for the decommissioning and recontouring is primarily through the Legacy Roads and Trails Remediation Initiative. Funding for the Blackberry culvert removal is unknown at this time. Implementation is proposed to begin in 2013. The proposed activities under the Legacy Roads Project are separated into two Project Elements: 1. Road Decommissioning/Treatments 2. Culvert Replacement with a Bridge and Legacy Structure Removal Proposed activities include: 1. Road Decommissioning/Treatments - clearing vegetation to allow road access, excavation, recontouring of slopes, revegetating disturbed areas, culvert removal, channel stabilization, erosion control measures, legacy structure removal; and 2) Culvert Replacement with a Bridge and Legacy Structure Removal There are four alternatives in the Copper Salmon Legacy Roads EA. Table 2 is a comparison of Alternatives by units of measured project activities. Aquatic Biota Biological Evaluation for the Copper Salmon Wilderness Legacy Roads Project, RRSNF Page 4 of 29 Table 2. Comparison of Alternatives by Activity ALTERNATIVES 1 2 3 4 Unit of (No (Proposed (Reduced (Reduced Activity Measure Action) Action) Road Work) Road Work) Project Element 1. Road Decommissioning/Treatments Roads decommissioned miles 0 15.3 9.8 3.9 Stream crossings each removed 0 6 6 2 Cross drains removed each 0 70 51 26 Project Element 2. Culvert Replacement with a Bridge/Legacy Structure Removal Removal of Culvert/Bridge Construction each 0 1 1 1 Removal of Legacy Wood Structure each 0 1 1 1 No Action Alternative 1 (No Action) Under the No Action alternative, no roads would be decommissioned, Blackberry Creek culvert would not be replaced with a bridge and the structures below the culvert would not be removed. Because these activities would not occur, this alternative would not fulfill the purpose and need for action. Alternative 2 (Proposed Action) The Rogue River-Siskiyou National Forest and Powers Ranger District propose decommissioning and recontouring up to 16 miles of roads originally closed between 1996 and 1999, replacing the Blackberry Creek culvert with a bridge and removal of legacy structures within the Copper Salmon Wilderness, 12 miles east of Port Orford, Curry County, Oregon. The project would also move up to 5,000 cubic yards of gravel about 800 feet to a location outside of the Wilderness. Alternative 2 would focus on removing roads, restoring wilderness characteristics, and removing non- conforming structures. 1. Road Decommissioning/Treatments Decommission all roads identified within the wilderness (14 roads, 15.3 miles). Full recontouring of the first 300 feet of all roads (when needed to deter OHV use). Up to 90 percent slope recontouring of all roads beyond the first 300 feet. Remove all culverts, cross drains, and non-conforming structures (70 cross drains). All stream crossings would be fully restored to establish the original stream channel (with banks restored to the above and below natural banks angle) (6 crossings). 2. Culvert Replacement with a Bridge and Legacy Structure Removal Blackberry Creek - remove the culvert and replace it with a bridge along with removing large wood, boulders, rock gabions, and other in-channel structures that were constructed to improve fish habitat but were installed in a manner that was, and continues to be, Aquatic Biota Biological Evaluation for the Copper Salmon Wilderness Legacy Roads Project, RRSNF Page 5 of 29 inappropriate for the given stream type. Removal of legacy structures would include the use of excavator-type machinery, spyders, backhoes, and dump trucks. Alternative 3 Alternative 3 would focus on removing roads at high risk of delivering sediment to streams, and minimizing vegetation removal. 1. Road Decommissioning/Treatments Decommission roads and cross-drains with a high risk of sediment delivery to streams (5 roads, 9.8 miles). High risk includes most stream crossings and mid-slope cross drains. Full slope recontouring of the first 300 feet of 11 roads (when needed to deter OHV use). No recontouring of roads beyond the first 300 feet. Remove culverts, cross drains, and non-conforming structures (51 cross drains) at high risk of sediment delivery. All stream crossings