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<br />The PBO established a two-tiered consultation process for future federal actions on <br />existing and new water-related activities subject to section 7(a)(2) of the ESA, with <br />issuance of the PBO being Tier 1 and all subsequent site-specific project analyses <br />constituting Tier 2 consultations covered by the PBO. Under this tiered consultation <br />process, the Service will produce tiered biological opinions when it is deternuned that <br />future federal actions are "likely to adversely affect" federally listed species and/or <br />designated critical habitat in the PRRIP action area and the project is covered by the <br />PBO. If necessary, the biological opinions will also consider potential effects to other <br />listed species and critical habitat affected by the federal action that were not within the <br />scope of the Tier 1 PBO (e.g., direct or indirect effects to listed species occurring outside <br />of the PRRIP acCion area). <br />Although the water depletive effects of this Federal Action to central and lowet Platte <br />River species have been addressed in the PBO, when "no effect", or "may affect" but "not <br />likely to adversely affect" determinations are made on a site-specific basis, the Service <br />will review these determinations and provide written concurrence where appropriate. Upon receipt of written concurrence, section 7(a)(2) consultation will be considered <br />completed for those federal actions. <br />Water-related activities requiring federal approval will be reviewed by the Service to <br />determine if: (1) those activities comply with the definition of existing water-related activities and/or (2) proposed new water-related activities are covered by the applicable <br />state's or the federal depletions plan. The Service has determined that the [Project Name] <br />meets the above criteria and, therefore, this Tier 2 biological opinion regarding the effects <br />of [Project Nanze] on the target species, whooping crane critical habitat, western prairie <br />fringed orchid, and bald eagle in the central and lower Platte River can tier irom the June- <br />16, 2006 PBO. <br />II. Consultation History <br />Table II-1 of the PB0 (pages 21-23) contains a list of species and critical habitat in the <br />action area, their status, and the Service's deternunation of the effects of the Federal <br />Action analyzed in the PBO. <br />The Service determined in the Tier 1 PBO that the Federal Action, including the <br />continued operation of existing and certain new water-related activities, may adversely affect but would not likely jeopardize the continued existence of the federally endangered <br />whooping crane, interior least tern, and pallid sturgeon, or the federally threatened <br />northern Great Plains population of the piping plover, western prairie fringed orchid, and <br />bald eagle in the central and lower Platte River. Further, the Service determined that the <br />Federal Action, including the continued operation of existing and certain new water- related activities, was not likely to destroy or adversely modify designated critical habitat <br />for the whooping crane. <br />The Service also determined that the PBO Federal Action would have no effect to the <br />endangered Eskimo curlew. There has not been a confirmed sighting since 1926 and this <br />2