Biological Assessment of Proposed Pecos River: 2001 Interim Irrigation Season Operations on the Pecos Bluntnose Shiner

摘要

This interim Biological Assessment (BA) analyzes the potential effects of the Bureau of Reclamations (Reclamation) 2001 irrigation season operations plan on the Pecos bluntnose shiner (shiner), (Notropis simus pecosensis), a federally listed threatened species within the Pecos River basin. This plan covers the 2001 operating season from March 1, 2001 to October 31, 2001. This species is native to the Pecos River and may be affected by irrigation season operations as proposed by Reclamation. Distribution and life requirements are discussed, as well as an analysis of the effects of the past two (1999 and 2000) irrigation season operations on this species. An Effects Determination has been made. The purpose of this interim BA is to formally consult with the Service over the 2001 interim irrigation operations of Reclamations discretionary actions that may affect the Pecos bluntnose shiner. During this interim period, if any new information or finding points to a need for revised operations, then Reclamation would consider modifying this current assessment or preparing a new assessment to address any significant operational changes which may be proposed.