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ODNR Division of Water    New Items  05/01/2008    New Issue of The Antediluvian newsletter now available. Volume XV Issue I 2008 Go to Antediluvian Download and Archive Page 02/25/2008  New Floodplains Fact Sheet: Understanding Your Flood Risk now available. Go to Fact Sheet Web Page      10/26/2007    Twenty two NEW, and twenty five revised, potentiometric surface maps are now available on-line. Click here to go to the Potentiometric Surface Maps   10/12/2007     Water Withdrawal Atlas by Drainage Basin and County    These atlases show water withdrawals from Ohio counties and basins in 2005 as well as withdrawal trends from 1991 to 2005. Click here to go to the Water Withdrawal Atlas Pages 06/01/2007  New Poster Combines Four State Aquifer Maps. This poster contains four interpretations of the unconsolidated aquifers of Ohio showing yield, drift thickness, hydrogeologic setting, and lithology. Go to State Aquifer Map Gallery for preview and downloads.       04/27/2007     New Chief Appointed to the Division of Water. Deborah Hoffman will be taking over as chief of the Division of Water on May 7th 2007. We wish retiring chief Dick Bartz the best of luck in his new endeavors beyond ODNR. Read ODNR News Release on Chief Appointment The Division of Water manages Ohio's surface and ground water resources; collects hydrologic data; develops ground water resource maps and pollution potential maps; issues permits for the construction of dams, dikes, levees and erosion control structures; inspects existing dams; operates the state canal systems; administers the state floodplain management program, and conducts water supply studies.