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TJNTTED~ATES DEPARTMENT OF THE ;~OR <br />FISH AND VVII.DLIFE SERVICE <br />FIS$ AND WII.DLIFE ENE{ANCEhffNI' <br />Cobrado State Otrice <br />730 Simms Street, Suite 290 <br />Golden, CO 80401 <br />Phone: (303) 231-5280 <br />FAX (303) 231-5285 <br />IN REPLY REFER TO: <br />FWE/CO:ES:Plants-Spiranthes diluvialis (Ute ladies'-tresses orchid) <br />November 23, 1992 <br />To Whom It May Concern: <br />rn10:` ~ <br />PRIDE IN <br />~~ ~ <br />_. t <br />1~ i <br />''i~! i c <br />~~ <br />,:...'- <br />., ~ <br />The U.S. Fish and Wildlife Service (Service) has established interim <br />requirements and guidelines for surveys to determine the presence or absence <br />of the federally threatened p7 ant species Spiranthes diluvialis, Ute Ladies'- <br />tresses orchid. These guidelines were developed by the Service in <br />consultation with biologists and ecologists knowledgeable about the species in <br />order to gain more information about the species, identify potential habitat, <br />and streamline and standardize survey procedures. <br />Spiranthes diluvialis occurs in seasonally moist soils and wet meadows near <br />springs, lakes, or perennial streams and their associated flood plains below <br />6,500 feet elevation in certain areas in Utah, Colorado, and Nevada. Typical <br />sites include old stream channels and alluvial terraces, subirrigated meadows, <br />and other sites where the soil is saturated to within 18" of the surface at <br />least temporarily during the spring or summer growing seasons. <br />The moist soil conditions and vegetation composition of known Spiranthes sites <br />suggest that wetlands regulated under the Clean Water Act qualify as potential` <br />Spiranthes habitat. Therefore, delineated wetlands, as well as other drier <br />sites matching the description above, should be surveyed if they occur in <br />specified areas in Nevada, Utah, and Colorado. <br />Surveys are required for appropriate sites below 6,500 feet elevation in the <br />following areas in Colorado: <br />a. Boulder and Jefferson Counties; <br />b. The South Platte River 100 year floodplain and perennial tributaries <br />from the Front Range as far east as Brush, Morgan County; <br />c. The Fountain Creek 100 year floodplain and perennial tributaries from <br />the Front Range to the southern boundary of El Paso County; <br />d. The Yampa River 100 year floodplain and its perennial tributaries <br />from Steamboat Springs west to the Utah border. <br />