1. Generalized altitude and configuration of the water table in parts of Larimer, Loogan, Sedgwick, and Weld Counties, Colorado Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: Washington, D.C. : Department of the Interior, United States Geological Survey, 1983 Format: Map Access & Availability: Loading
2. Geologic map of the Bailey 30ʹ by 60ʹ quadrangle, north-central Colorado Author/Creator: Ruleman, C. A. (Chester Allan) Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 2011 Format: Map Access & Availability: Loading
3. Geologic map of the Upper Arkansas River Valley Region, North-Central Colorado Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: [Reston, Virginia] : U.S. Geological Survey, 2017 Format: Map Access & Availability: Loading
4. Geologic studies of the Platte River, south-central Nebraska and adjacent areas, geologic maps, subsurface study, and geologic history Author/Creator: Condon, Steven M. Publication/Creation: [Reston, Va.?] : U.S. Geological Survey ; Denver, CO : Information Services [distributor], 2005 Format: Map Edition: Version 1.0. Access & Availability: Loading
5. Geology and hydrology of the deep bedrock aquifers in eastern Colorado Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: [Reston, Va.] : Department of the Interior, U.S. Geological Survey, 1987 Format: Map Access & Availability: Loading