34th Annual Conference

May 11-14, 2026

Agenda:

Monday, May 11, 2026

9:30 am

Field Trip: Montana Resources

The tour will depart from the front entrance of Fairmont.  Attendees need to check in at the conference registration desk before loading the bus.  Hard hats, safety vests, and safety glasses will be provided (however please feel free to use your own PPE).  A grab-and-go breakfast, as well as lunch, will be provided.  Please be prepared for the weather as you will be outside for portions of the tour. 

3:00 pm

Return

The tour of MR will conclude by this hour. Attendees may either return to Fairmont by bus or proceed to Butte Brewing for a relaxed, no-host gathering for about an hour. Those who choose to attend the brewery gathering will also have bus transportation provided back to Fairmont.

Corn Hole Tournament

Join us for the 5th Annual Conference Corn Hole Tournament — Monday, May 11, 2026, sponsored by Water & Environmental Technologies.

  • Register online or the day of the event beginning at 6:00 pm.
  • Draw for teams at 6:30 pm and start throwing at 7:00 pm.
  • 2 free drink tickets per person and light snacks will be provided.
  • Spectators are WELCOME!
  • Prizes:  
    1st: $80 cash plus swag
    2nd:$50 cash plus swag
    3rd:$30 cash plus swag

Tuesday, May 12, 2026

Day Chair:  Eric Dahlgren MT DEQ

7:30 am
Registration Opens
8:30 am
Welcome Breakfast (This will be a sit-down breakfast featuring the keynote address.)
9:00 am

Keynote Address: America's Next Watershet Moment: Artificial Intelligence, Mining, and Montana Technological University

Johnny MacLean, PhD, Chancellor, Montana Technological University

9:45 am

Break

10:30 am

Tribute to the memory of Dave Williams, BLM (retired)

Joe Griffin, Montana DEQ (retired) & Amanda Rossi, BLM

Permitting Session

11:00 am

Updates on Hard Rock Mine Permitting in Montana

Garrett Smith, Montana DEQ

11:30 am

State–Federal Coordination in Montana Mine Permitting: A Practice-Based Perspective on Process, Timing, and Operations

Morgan Pettit, Crowley Fleck PLLP

Noon Lunch (provided to all attendees)

 

Exploration Session

1:00 pm

Exploring Butte's Historic Rainbow Block

John Marjerison, Silver Bow Mining Corp.

1:30 pm

Dakota Gold Corp: Revitalizing the Homestake District of South Dakota

Sky Dragoo, Dakota Gold Corp.

2:00 pm

The Importance of Working with Community

Nancy Schlepp, Sandfire Resources America

2:30 pm

Break

 

Water Session

3:00 pm

A New Paradigm – the Berkeley Pit and the Post-Pilot Project Era

Jeremy Fleege, PE, Montana Resources

3:30 pm

Scaling Up Facilities: Taking Montana Tech from Lab to Pilot

Teagan Leitzke, PhD, & Jerry Downey, PhD, Montana Technological University

4:00 pm

Belt Water Treatment Plant

Bob Flesher, PG, Montana DEQ and Steve Hector, PE, HGL, Inc.

4:30 pm

Two Approaches for Managing Low Metal Discharge Limits

Hope Mariska, Ascentarix

5:00 pm

Social hosted by Tetra Tech

 

Wednesday, May 13, 2026 

Day Chair:  Steve Lubinski, BLM

7:30 am Registration Opens

 

Reclamation Session

8:30 am

Grosgarth Mine Investigation and Mitigation - Coal Mine in Northeast Montana

Kyle Johnson, PE, Herrera Environmental, Inc. & Joel Brown, PhD, Aesir Consulting, LLC

9:00 am

Emergency Earthworks! (dam removal)

Breeyn Greer, PE & Lindsay Chutas, PWS, Haley & Aldrich, Inc.

9:30 am

Pretty Girl Placer Reclamation Project

Matt Johnson, RESPEC

10:00 am

Break

 

Update Session

10:30 am

Troy Mine: How We Are Achieving Long‑Term Passive Water Management

Caroline Kaufman, Hecla, Inc. & JP Downey, Troy Mine

11:00 am

A Look at Zortman/Landusky after 26 Years

Drew Herrera, PE, HGL, Inc.

11:30 am

Happenings at Sheep’s Creek

Scott Osterman, US Critical Materials

12:00 pm

Lunch (provided to all attendees)

 

Mining Revitalized Session

1:00 pm

Accelerating the Design and Construction of an Antimony Processing Facility in Montana to Meet US Critical Mineral Needs – US Antimony Corporation 

Jeff Fink, US Antimony Corporation, Randy Huffsmith & Alan Erickson, WSP, and Craig Loenbro Construction

1:30 pm

United States Antimony Operations and Development Update

Aaron Tenesch, US Antimony Corporation

2:00 pm

Generational Tungsten Property in Beaverhead County

Dirk Nelson, PE, Almonty Gentung Montana Corp.

2:30 pm Break

 

Advances in Mining Session

3:00 pm

Use of Drones and “SPOT” in Abandoned Mines

Chris Roos, PhD, PE, Montana Technological University
3:30 pm

Sustainable Practices in Mining

Jeremiah Vermillion, Environmental Products & Applications

 

Improvements at a Legacy Site Session

4:00 pm

Buttressed Repository Improvement Construction

Tony Maffeo, Arcadis US, Inc.
4:30 pm

A Novel Bioremediation Treatment System using Bioaugmentation to Target Manganese Removal

Leonard Santisteban, PhD, Freeport-McMoRan Inc

5:00 pm

Social provided by Pioneer Technical Services

 

Thursday, May 14, 2026

Day Chair:  Warren McCullough, MT DEQ (retired)

7:30 am Registration Opens


Reclamation Session

8:30 am

Evaluating Potential Acid Generation of Pyritic Waste Rock Through 24-Hour and Five-Day Weathering Experiments for Closure Planning

Jeff Langman, PhD, University of Idaho

9:00 am

Assessing Dynamic Equilibrium in Reclaimed Drainages – Montana Coal Mines

Mitch Hoffman & Zach Ashauer, Montana DEQ

9:30 am

Testing Sediment Amendments Under Site-Relevant Variability: Sediment Type and Time Effects

Steve Dent, PhD, CDM Smith, USA

10:00 am Break


Geochemistry Session

10:30 am

Geochem talk on project in South America

Nick Tucci, Haley & Aldrich

11:00 am

Efficient and Customizable:  RESPEC’s Dynamic Code-based Tool for Geochemical Modeling

Ryan Williamson, EIT, RESPEC

11:30 am

Microbial Iron Uptake Kinetics Across pH 2–9: Implications for ARD Prediction and Mine Waste Management

Eva Wordal, Ph.D., Montana Technological University

12:00 pm Lunch (provided to all attendees)

 

End of Conference!



Tetra Tech attendees networking

Attendees enjoying a beautiful evening while networking at the social hosted by Tetra Tech.


Wednesday, May 14, 2025 Agenda
Time Activity
Pioneer Technical Services attendees getting food

Attendees helping themselves to an amazing spread of food at the social hosted by Pioneer Technical Services.