Meeting/Event Information

November Luncheon - Managing Reactive Rock in the Northwoods!

November 06, 2018
11:45 AM to 1:15 PM
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Radisson Hotel Roseville
2540 North Cleveland Avenue
Roseville, MN 55113


Registration for the AIPG MN Section November Luncheon is now open online! The cost is $21 for non-members and $16 for members when registering before Monday, November 5, 2018 at 11:00 AM. Students may attend free of charge by registering in advance. Same-day luncheon registration cost is $25.  As always, non-members and non-geologists are welcome to attend! Walk-ins are also welcome - we typically have about 10 spaces available.



by Mehgan Blair, PG, Barr Engineering Co.


Presentation Abstract

Environmental review and permitting of Minnesota’s first Cu/Ni +/- PGE mine has ushered in a previously unprecedented level of research, data collection, and engineering studies aimed at understanding and mitigating the processes inherent in the weathering and leaching of exposed rock and soil waste materials. These studies range in scale from the mineral grain-boundary level to regional studies of hydrology and water quality. All this has happened while our billion-dollar iron ore industry maintains Minnesota’s position in the top-ten (probably top 5, discounting aggregates) largest mineral industries in the US. Importantly, the active industry and ongoing construction and reclamation of disturbed lands means that we have ample opportunity to study and understand leaching and weathering processes, neutral- and acid- rock drainage signatures, and the before and after effects of management and reclamation processes. Field observations of these activities provide a rich dataset representative of real-world conditions. I will present a partial history and results of some of these investigations, and emphasize how field data are applied to interpret and understand potential future conditions.


Speaker Biography

Mehgan Blair is a Senior Geologist and Project Manager with Barr Engineering Company, specializing in the characterization and management of rock and soils associated with mining and development activities in northern Minnesota. She joined Barr in 2005 after working  as a hydrologist with the Minnesota Department of Natural Resources in St. Paul. She holds a BA in geology from Augustana College in Rock Island, IL, and an MS degree in geology from Oregon State University, where she worked on modern glacial process in southeast Alaska, studied economic geology and geochemistry in the copper porphyry deposits of Nevada, and visited world-renowned South African gold, diamond, copper/nickel +/- PGE, phosphate mining districts.


At Barr, Mehgan specializes in geologic and mineralogical characterization, especially as it relates to surface and ground water quality for mining and contaminated legacy sites. Her work is multi-disciplinary, involving geology, geochemistry, water quality, and hydrologic and thermodynamic modeling, land-use planning, geotechnical engineering, and community outreach. She is a registered Professional Geologist in Minnesota, serves as the President of the Mesabi Range Geological Society, and is an active member of the American Society of Mining and Reclamation.


$16.00 AIPG Member

$21.00 Non-Member

$0.00 Student

$250.00 2019 AIPG Minnesota Section Sponsorship!

$0.00 Donation to Education Fund