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Locations where pygmy rabbits and(or) their sign were observed or not observed. .. 16. Three separate energy-development areas where songbird sampling occurred. ....... 17. Location of mule deer study area in the WLCI region and estimated population-level migration route and relative amounts of use for mule deer in the Wild Horse Winter Range, southwest Wyoming. .

Front and back cover photographs: (Front) Muddy Creek, Wyoming. Aquatic and riparian habitats have been a significant focal point of recent U.S. Geological Survey science efforts in the Wyoming Landscape Conservation Initiative study area. Photo by Robert McDougal, U.S. Geological Survey. (Back) The Sand Dunes Wilderness Study Area, located southeast of Farson, Wyoming, is one of the many locations evaluated by the U.S. Geological Survey's pygmy rabbit research team. The team has been conducting on-the-ground pygmy rabbit occupancy surveys to assess and improve the accuracy of an existing pygmy rabbit habitat model, and lidar imagery is being evaluated for its usefulness as a tool for identifying and mapping potential pygmy rabbit habitat across the species' range. Photo by Spencer Schell, U.S. Geological Survey.

For more information on the USGS-the Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment, visit http://www.usgs.gov or call 1-888-ASK-USGS.For an overview of USGS information products, including maps, imagery, and publications, visit http://www.usgs.gov/pubprodTo order this and other USGS information products, visit http://store.usgs.gov Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.Although this information product, for the most part, is in the public domain, it also may contain copyrighted materials as noted in the text. Permission to reproduce copyrighted items must be secured from the copyright owner.Suggested citation: Sweat, M.J., 2013, Groundwater well inventory and assessment in the area of the proposed Normally Pressured Lance natural gas development project, Green River Basin, Wyoming, 2012: U.S. Geological Survey Data Series 770, 27 p., http://pubs.usgs.gov/ds/770/.iii Acknowledgments EnCana Oil & Gas (USA) is thanked for its cooperation and participation during this project. Specifically, the use of the Jonah Workforce Facility and access to EnCana leases is appreciated, as is contact with local grazing leaseholders. Local ranchers with grazing leases in the area are thanked for providing information about the location and status of groundwater wells, especially AbstractDuring May through September 2012, the U.S. Geological Survey, in cooperation with the Bureau of Land Management, inventoried and assessed existing water wells in southwestern Wyoming for inclusion in a possible groundwater-monitor network. Records were located for 3,282 wells in the upper Green River Basin, which includes the U.S. Geological Survey study area and the proposed Normally Pressured Lance natural gas development project area. Records for 2,713 upper Green River Basin wells were determined to be unique (not duplicated) and to have a Wyoming State Engineers Office permit. Further, 376 of these wells were within the U.S. Geological Survey Normally Pressured Lance study area. Of the 376 wells in the U.S. Geological Survey Normally Pressured Lance study area, 141 well records had sufficient documentation, such as well depth, open interval, geologic log, and depth to water, to meet many, but not always all, established monitor well criteria. Efforts were made to locate each of the 141 wells and to document their current condition. Field crews were able to locate 121 of the wells, and the remaining 20 wells either were not located as described, or had been abandoned and the site reclaimed. Of the 121 wells located, 92 were found to meet established monitor well criteria. Results of the field efforts during May through September 2012, and specific physical characteristics of the 92 wells, are presented in this report.