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pipeline corridor by Grand River Institute (Barrett 1994). The azchaeological site was evaluated as needing data in order to make a recommendation as to its eligibility on the National Register of Historic Places, and the isolated finds are not eligible. These sites will be delineated in the field and avoided during construction of the Yankee Gulch Project pipelines, as required. .Archaeological monitoring, in which a qualified azchaeologist would observe excavation of the trench for cultural resources that might be encountered, would be performed during pipeline construction only as required by the BLM. 3.2.2 Paleontological Resources If required by the BLM, paleontological monitoring would be conducted during construction of the pipeline. For this effort, a qualified paleontologist would observe excavation of the pipeline trench for any paleontological resources that might be encountered. Efforts would be made to avoid providing the exact location of scientifically significant resources if such attention would conflict with management objectives for those resources. 3.2.3 Threatened, Endangered, and Protected Species The following information applies to threatened, endangered, and protected plant and animal species along the Yankee Gulch Project pipeline corridor. • Plant Surveys: The primary plant species of concern on BLM- administered lands aze the Dudley Bluffs bladderpod and the Dudley Bluffs twinpod, both of which are federally listed as threatened. Both of these species are found only on the Thirteenmile Creek Tongue of the Green River Formation (Thirteenmile Tongue). American Soda contracted authorized botanists to conduct surveys for sensitive plant species along .portions of the ROW not ~ previously surveyed for other pipeline studies. The pipeline corridor. from the Piceance Site to the upper end of Hatch Gulch was surveyed by Western Slope Environmental Consultants in the spring of 1998 (Young and Young 1998). No threatened or endangered plant species were identified along this reach, including an outcrop of the Thirteenmile Tongue in Hatch Gulch. An additional survey of the reach from the upper end of Hatch Gulch to the top of the mesa leading to the Greasewood Compressor Station may be required if it is determined that the construction ROW would cross the Thirteenmile Tongue. A botanical survey that included a 200-foot-wide corridor from the centerline of the existing Barrett Resources gas pipeline was completed in 1994 (Barrett 1994). No occurrences of the Dudley Bluffs bladderpod or the Dudley Bluffs twinpod were documented along this corridor. Pipelvie Plan of Development 17 Yankee Gulch Sodium A1'uterak Project Amnion Soda. LLP.