In 2018-2019, the Salmon River Basin Nutrient Enhancement (SRBNE) project will implement marine-derived nutrient additions to enhance primary, secondary, and tertiary production in habitats supporting Endangered Species Act (ESA) listed fishes in the upper Salmon River Basin.  The SRBNE project will also identify and assess potential habitat restoration projects, evaluate and prioritize them, and ultimately select the most effective and feasible project(s) for implementation in the YFSR.  This will occur in coordination with the USFS and the YFSR IDT.  Potential projects will directly address habitat limiting factors explicitly identified in: a) the Yankee Fork Tributary Assessment Upper Salmon Subbasin (Bureau of Reclamation (BOR) 2012); b) the Salmon Subbasin Management Plan (Ecovista 2004); and c) the 2014 Supplemental Federal Columbia River Power System (FCRPS) Biological Opinion (BiOp) (NOAA Fisheries 2014).  The SRBNE project will then conduct inventories and assessments specifically designed to support future habitat condition implementation actions in the YFSR.  Ongoing and future habitat actions will address limiting factors and diminished carrying capacities in tributary habitats of the Yankee Fork Salmon River (YFSR).  Potential habitat actions include the addition of marine-derived nutrient subsidies such as live Chinook salmon, Chinook salmon carcasses, and salmon carcass analogs.  Other physical habitat actions include the addition of habitat-forming natural material instream structures such as large wood.  Course particulate organic matter (CPOM) is a major energetic resource for most stream ecosystems and consists of allochthonous materials produced and derived from riparian sources (e.g., leaves, seeds, insects, fruits, etc.) and autochthonous materials produced within the stream (e.g., algae, aquatic insects, salmon carcasses, etc.).  CPOM is subsequently processed by stream biota and often constitutes a major energy source that supports the ecological integrity of stream food webs.  CPOM is transported downstream via unidirectional flow and the deposition and trapping of CPOM materials along the way is termed retention.  Retention of CPOM provides the critical link between input, storage, and processing of organic materials available to stream ecosystem consumers.  Large wood, especially in conjunction with accumulations of smaller organic materials, represents one of the most important structural components of small stream ecosystems.  Without these retention structures, a stream functions more like a conduit pipe, with inputs being rapidly flushed from the system and into downstream habitats.  Therefore, coupling nutrient enrichment with the addition of habitat-forming natural instream structures that retain CPOM materials, like large wood, represents a synergistic partnership that addresses limiting factors and supports the ecological integrity of stream habitats. The development of a habitat action plan that couples nutrient enrichment with large wood additions in an adaptive-management framework will be the focus of the 2018-2019 contract.  Pre and post project implementation monitoring will occur to determine if project goals and objectives are met.  The implementation of the habitat action plan following review, environmental compliance, and permitting will occur in 2019-2021.  All habitat actions will follow HIP III guidelines and conservation measures.