This document presents the results of a scientific study that identified and characterized 50 natural springs located in 4 counties within the Upper Trinity Groundwater Conservation District of central North Texas. The springs were surveyed between 1976 and 1977 to measure flow rates, identify geological sources, and collect water quality data. Most springs were found to issue from the Paluxy and Antlers formations and have average flow rates under 5 liters per second. Isotopic dating of spring waters indicated sources from modern recharge within the last 50-100 years.