Hydrogeologic Logging and Lab

Presented on Thursday, December 5, 2013

Groundwater professionals from many different backgrounds are tasked with describing sample cuttings from boreholes drilled for water wells. Few water well professionals have been trained in describing cuttings from water well boreholes. The result is borehole logs that are produced are inconsistent and often are so poor they cannot be interpreted for hydrogeologic assessment where important hydrogeologic data could have been collected. Attendees will use the Hydrogeologic Classification System for Water-Well Boreholes (HCSWB) to log a suite of drill cuttings and select filter pack and slot size for a municipal water-supply well. HCSWB provides a concise menu-driven format that ensures basic information is recorded, yet allows enough flexibility for describing unique hydrogeologic features. HCSWB helps document unconsolidated sediments so the relative hydraulic conductivities can be accessed based on grain size and the location of significant water-producing zones that are observed during drilling. Space is limited to 44 people. Preregistration is required.

Presenter:
Thomas Hanna, PG
Johnson Screens, Durango, CO
Thom Hanna is employed as a hydrogeologist for Johnson Screens and works in well design, construction, rehabilitation, and development areas. He received a B.S. in geology from Michigan State University and an M.S. in geology from Western Michigan University. Hanna is a Registered Professional Geologist in Arizona, Kentucky, and Wyoming. Before joining Johnson Screens, he worked as a hydrogeologist for several groundwater consulting firms including Hydrologic Consultants Inc., S.S. Papadopulos Associates, and Golder Associates for more than 15 years. His experiences include hydrogeologic investigations, design and optimization of well efficiencies for mine dewatering, and water supply investigations.

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