Revision History for SIR 2013-5219 Shana L. Mashburn, Derek W. Ryter, Christopher R. Neel, S. Jerrod Smith, and Jessica S. Magers Hydrogeology and Simulation of Groundwater Flow in the Central Oklahoma (Garber-Wellington) Aquifer, Oklahoma, 1987 to 2009, and Simulation of Available Water in Storage, 2010–2059 ----------------------------------------------------- Posted online February 10, 2014 ----------------------------------------------------- Revised and reposted April 2018, version 1.1 The text version was modified. In the table of contents, an extra apostrophe was removed from the caption of figure 12. Figure 12 on page 20 was modified as follows: - replaced the raster image - replaced the explanation - changed the date in the explanation from 2000 to 2009 The first full paragraph on page 21 was changed to "The saturated thickness of the Central Oklahoma aquifer in the eastern part of the aquifer in Lincoln and Pottawatomie counties is relatively thin, 200–300 feet, related to the thinner geologic units in that area that are caused by the dip of the formations and erosion (fig. 12). The thickest zone of saturation is about 920 feet located near 35°25' latitude and 97°25' longi- tude (near Tinker Air Force Base, location shown on figure 1) along the extent of the Hennessey Group confining unit that allows freshwater recharge just to the east of the Hennessey Group extent and coincides with the deepest part of the base of freshwater (fig. 11) and the areas of higher percent sand in the aquifer (described in the Hydrogeologic Framework section of this report). The saturated thickness near 35°50' latitude and 97°05' longitude in another relatively thick p rt of the aquiferin northwest Lincoln County is about 650 ft." -----------------------------------------------------