Construction of geothermal wells on the Ohio State campus in Columbus provided unprecedented insight into the character and origin of the Newburg Zone. In 2010, several 550-foot deep wells were drilled on 20-foot centers using air-rotary rigs. The boreholes were open-hole completions below 100 feet of surface casing. Drillers consistently encountered void zones at depths of 280 to 350 feet that produced geysers in previously drilled wells. This foreseeable calamity would continue to bedevil the project until another drilling method was used. Borehole videotapes taken in several wells, thin sections of core and geophysical logs taken in wells constructed by Ohio DNR subsequent to the benchmark work of Norris and Fidler in the 1970’s showed that the void zones occur from near the top of the Salina Group down into the top of the Lockport Dolomite. From campus, these units were traced northwestward to Toledo where they crop out in several quarries. Unusual caves, known as flank-margin caves, can be seen at one or more horizons in the walls of these quarries. Flank-margin caves form from the mixing of fresh groundwater with seawater, which can produce highly undersaturated conditions around the rims of carbonate islands and peninsulas such as exist today in the Bahamas and other tropical areas. These caves, which formed 400 million years ago when the North American continental plate was 30 degrees south of the equator, comprise the Newburg Zone. The origin of flank-margin caves is consistent with the areal extent, multiple levels, and sporadic occurrence of the Newburg Zone. All of which should serve as a warning to anyone contemplating construction of geothermal wells in west-central Ohio.

Hydrogeological Investigation of the Carbonate Bedrock Aquifer to Evaluate Impact High-Yielding Wells, Ottawa County, Ohio
Curtis J. Coe, CPG, PG
How Well Development and Redevelopment Affects Long-Term Well Performance History
Stuart A. Smith, CGWP

Effective Water Well Rehabilitation – Complying with Revised Total Coliform Rule and Controlling Iron Bacteria
Neil Mansuy

Numerical Groundwater Flow Modeling of a Northern Appalachian Coal Basin Bedrock Valley Exhibiting Stress-Relief Fractures
Andrew Ashton

No one can control, manage, or sustain what is not measured, so monitoring is the first step needed to ensure success. In terms of groundwater, monitoring can identify aquifers being used in an unsustainable manner and that information can then be used to find remedies to sustain the systems, as well as the industries and businesses that rely on them. One example of this, which will be discussed in this lecture, is the deep sandstone aquifer of northern Illinois and southeastern Wisconsin, where decades of overpumping have created one of the largest cones of depression in the world. Both states have conducted detailed studies of the aquifer and have begun regional planning to control the human and environmental impacts. (The McEllhiney Lecture Series is made possible by a grant from Franklin Electric.)

Alex Bandar will discuss the democratization of innovation, as observed from his role as director of the Columbus Idea Foundry, a nationally recognized "Makerspace". At the CIF, Makers of all types - from scientists to designers and more - cross pollinate to bring the next generation of products, art projects and innovations. Community workshops like the CIF represent an exciting new model of empowering nearly anyone with the tools to bring their idea to reality.

Alternative Methods to RSK 175 for the Analysis of Dissolved Gases in Drinking Water
Nathan Valentine
Real-Time Monitoring System for Evaluating Long-Term Variability in Methane in Domestic Water Wells in Pennsylvania
Richard Wardrop, PG

Shale Gas Drilling and Groundwater Quality in Northern Pennsylvania
Paul Wendel, Ph.D.
The Occurrence of Methane in Shallow Groundwater from Extensive PreDrill Sampling
John Boulanger, PG
Relationship between pH and Dissolved Methane Concentrations in Groundwater from Water Wells in Northeastern Pennsylvania
Nancy Pees Coleman, Ph.D.
Groundwater Protection Within Shale Gas Areas: Examples from Pennsylvania Source Water Protection Technical Assistance Program
Alfred C. Guiseppe, PG