aquifers.sdsmt.eduGeology and Geological Engineering
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-- -- STUDENT VOTING: 2019-2020 All Class Elections on Wednesday March 27th, 2019 8am-8pm. VOTE NOW! Classes resumed today as scheduled. Faculty are aware students may have had travel delays back to campus because of weather. We advise students to contact their faculty when back on campus. Registration for Summer 2020, Fall 2020 and Spring 2021 Courses REGISTER NOW! South Dakota Mines is operating at LEVEL 3: FACE COVERINGS REQUIRED IN ALL PUBLIC SPACES ON CAMPUS for students, faculty, staff and visitors. For the latest updates see the Rockers Return website. South Dakota Mines Moves to Online Classes for Remainder of Semester. All events cancelled through May 15. South Dakota Mines spring 2020 commencement ceremonies are also postponed. Further details will be shared as new plans are confirmed. More Info Give Degrees Inquire Visit Apply Give Degrees Inquire Visit Apply About Admissions Academics Campus Life Athletics Research & Innovation About Admissions Academics Campus Life Athletics Research & Innovation Academic Departments Home > Academics > Departments > > Aquifers Academic Departments AQUIFERS-INTRODUCTION BLACK HILLS AQUIFERS Download Aquifer Maps -- AQUIFERS-INTRODUCTION BLACK HILLS AQUIFERS Download Aquifer Maps -- Home Academics Departments Aquifers -- Aquifers-Introduction An aquifer is a body of saturated rock through which water can easily move. Aquifers must be both permeable and porous and include such rock types as sandstone, conglomerate, fractured limestone and unconsolidated sand and gravel. Glossary of Ground-Water Terms General Ground-Water Studies in the Black Hills SD Mines Aquifer Mapping Project: South Dakota School of Mines and Technology and the West Dakota Water Development District The Black Hills Aquifer Mapping Project has produced two types of studies relating to ground water in Pennington and Custer Counties. The first of these defined areas of potential aquifer vulnerability and susceptibility in sedimentary aquifers. The area of study covered nine geologic quadrangles (7.5 minute topographic quadrangles) in Pennington County along the eastern flank of the Black Hills. The second, consisting of two parts, examined the quality of ground water in the crystalline aquifers in six quadrangles in the core of the Black Hills in Pennington County and a much smaller area surrounding the city of Custer. The study of the sedimentary aquifers was undertaken to determine and to evaluate the aquifer vulnerability and susceptibility of their recharge areas. Four aquifers, from oldest to youngest the Deadwood Formation, the Pahasapa Limestone (also called the Madison Limestone), the Minnelusa Formation, and the Inyan Kara Group, were examined. Five map types were prepared for each aquifer. This began with preparation of a geologic map from which others detailing structure contours (elevations), depth-to-aquifer, aquifer vulnerability, and aquifer susceptibility were derived. In the crystalline aquifers (composed of Precambrian schist, granite, quartzite, etc.) water quality was the focus. Samples were taken from individual home sites and analyzed for arsenic, iron, nitrate, sulfate, hardness, coliform bacteria, and fecal coliform bacteria. The results showing the areas (Pennington County and Custer) are presented as “report cards” for each of the contaminants. Aquifer Map Types Geology A Geologic map shows the locations at which individual rock sequences, e.g., the Harney Peak Granite or the Pahasapa Limestone (Madison Limestone), are present at the Earth’s surface. All rock units within the area of the map are included and are shown by color or patterns. Depth-to-Aquifer A Depth to Formation map shows the depth of the top of the aquifer below the earth's surface. It gives the estimated depth that one would need to drill to hit the aquifer. These depths are approximate only, with uncertainties of 50-100 feet or higher. Structure Contour A Structure Contour map shows the elevation of the surface of the aquifer relative to sea level. It is like a topo map of the top of the aquifer, and allows you to see geologic structures such as folds or faults. Susceptibility An Aquifer Susceptibility map reflects the innate ability of an aquifer to transmit water and contaminants from the surface into the aquifer, based on the rock type and other properties such as fracturing and porosity. Vulnerability An Aquifer Vulnerability map highlights sensitive regions where aquifers are at especial risk due to their susceptibility and the potential for man-made hazards such as faulty septic systems or contaminant spills. Ground-Water Quality Water quality in this study defines the chemical (e.g. hardness, arsenic, etc.) and biological (coliform bacteria) qualities of ground-water. Download Maps Water Quality Studies The Water Quality project is testing water wells to acquire baseline information about water quality in the metamorphic and igneous rocks (crystalline aquifers, brown in the figure above) in the central Black Hills. Participation is voluntary, and homeowners receive a copy of the test results. Results from the three years of sampling (2013-2014-2015) targeting the central Black Hills is complete. View results for the Water Quality Studies Publications related to this project This project is being funded by the West Dakota Water Development District . We would also like to thank the South Dakota Geological Survey and the South Dakota Department of Transportation for sharing GIS data for the project. South Dakota School of Mines & Technology 501 E. 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Human Resources Info. Technology Marketing and Communications ATHLETICS Hardrocker Athletics The Hardrock Club > Copyright 2020. All rights reserved. The South Dakota School of Mines & Technology is an equal opportunity educator & employer. Accreditation by The Higher Learning Commission . Privacy | Sitemap HOME APPLY VISIT VIEWBOOK DEGREES RESEARCH PEOPLE EVENTS LIBRARY SPORTS FACEBOOK TWITTER...