Revision History for Scientific Investigations Report 2004–5209 By Richard N. Slattery and Lisa D. Miller A water-budget analysis of Medina and Diversion Lakes and the Medina/Diversion Lake system, with estimated recharge to Edwards aquifer, San Antonio area, Texas ________________________________________ Posted online in 2004 ________________________________________ Revised and reposted on February 15, 2017, Version 1.1 Appendix 1 has been added to the report. The appendix provides a statistical reanalysis of Medina Lake stage data and groundwater outflow (GWout) from Medina Lake and Diversion Lake. In the appendix, different regression methods were tested in an effort to identify a regression equation that more accurately models the relation between GWout from Medina and Diversion Lake and Medina Lake stage than the original regression equation, equation 4 on page 11. The methods and results of the statistical analysis are presented in the appendix. Two sentences were added on p. 14 to point out the addition of appendix 1 and to summarize its content. The sentences read: “An additional statistical analysis examining the relation between Medina Lake stage and GWout was completed in 2016. The results of this reanalysis include a new log-log weighted least-squares regression equation with prediction intervals (appendix 1).” The phrase “was completed in 2016” refers to the work documented in this new appendix.