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This report summarizes the analytical phase of a Species Status Assessment (SSA) for the Three Forks springsnail (Pyrgulopsis trivialis). The Three Forks springsnail is a small hydrobiid snail that occurs in springs and seeps in the White Mountains in eastern Arizona. Extant populations are within the Boneyard Creek Complex (seven populations of 12 springs) or Boneyard Bog Complex (five populations of nine springs). At the Three Forks Complex, springsnails had previously occupied five springs, but those populations are now considered extirpated. In this document, when referring to the Three Forks springsnail, we use the terms "species" based on the definition in the Endangered Species Act of 1973, as amended (ESA; 16 U.S.C. 1531 et seq.).

The SSA framework uses the three biological principles of resiliency, redundancy, and representation to assess the species� viability or its ability to persist over time (USFWS 2016, Smith et al. 2018). Within the SSA, we present a synthesis of our current understanding of the species' ecology and the factors that influence it to evaluate the current status and to predict the future status of its resources and condition. This report intends to provide biological support for a status review and recovery plan for the Three Forks springsnail; it does not represent any opinion or decision by the U.S. Fish and Wildlife Service (USFWS). Instead, the document provides a review of the best available information related to the biological status of the Three Forks springsnail.