Forward looking infrared (FLIR) imaging in Fredericktown, Missouri, June 2018

In June 2018, U.S. Geological Survey (USGS) in cooperation with the U.S. Environmental Protection Agency (EPA) collected geophysical measurements to help evaluate the suitability of a proposed landfill site for disposing mine-waste materials in Fredericktown, MO.   Forward Looking Infrared (FLIR) images were acquired at two locations to characterize the temperature of the water and the embankment along the shoreline of City Lake to evaluate potential groundwater discharge locations. The images were collected in the evening dusk to avoid reflections off the water surface while pointing at the shoreline. Visual true-color photographs and FLIR thermal images were collocated to help identify the location of potential thermal anomalies that might indicate groundwater discharge into the lake. The visual images can be used to help interpret the thermal images that might show obstructions or reflections from the vegetation.