About Us

OUR TEAM

Management

Jesse Blattner

Chief Executive Officer / Owner

Lester Tuell

General Manager

James Feehan

Chief Financial Officer

LET'S WORK TOGETHER

Careers

Family Owned, Since 1980.

SBI is a family-owned raisebore contractor operating since 1980. Originally formed as Stu Blattner Inc., the company was acquired for the third time in 2021 by family members who changed its name to Subterranean Boring, Inc.

SBI provides turnkey raisebore contracting services and manufactures replacement raisebore machine parts and consumables.

1980 - PRESENT

Our History

Company start date

Stu Blattner Inc.

Founded by Stu Blattner in 1980 and named Stu Blattner Inc.

1980

First long term contracts with Molycorp, Leadville (ASARCO), and Homestake Mine

1991-1997

Started working internationally

1998

Created a strategic alliance with Mancala in Australia

2005

Started manufacturing raisebore machine replacement parts

2007-2008

Company acquired by 2nd generation of Blattners

2011

Created Golden Machining Solutions (GMS) to diversify manufacturing

2013

Moved to current location, 15000 West 44th Ave. (30,000 sqft.)

2014

Largest raisebore constructed by SBI, 20’ diameter

2017

Change of ownership again (still in the Blattner family), with a name change to Subterranean Boring, Inc.

2021

We produce the parts you need to keep your machines running

Our Products

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© 2025 Subterranean Boring, Inc.

Jesse Blattner

Chief Executive Officer / Owner

“Between growing up in the Raise Boring Mining Industry, and more actively part of the industry since 2007, Jesse has dedicated over 15 years leading, expanding and contributing to the success of SBI. His concern with providing Customers the optimal Raise Boring solution, with safety at the forefront, is the hallmark of Jesse’s dedication to the industry.  Consistently striving to be the best, Jesse has led by example, and encourages thorough critical thought processes coupled with individual responsibility; all of which yields optimal outcome solutions for all parties involved.”

Lester Tuell

Vice President of Operations

With a number of senior roles within Subterranean Boring Inc, Lester has had an extensive career in Raise boring, with over 15 years of experience throughout 3 continents. Lester is passionate about underground mining and takes great pride in delivering the best possible outcomes to clients and employees alike. He is committed to driving continuous improvement and plays an integral role in business development, client relationships and operations management.

James Feehan

Chief Financial Officer

Mr. Feehan offers more than 30 years of experience in accounting, finance and taxation.  His experience includes financial reporting, budgeting, banking and investor relations, tax compliance review and staff supervision. Mr. Feehan is a Certified Public Accountant (inactive) and currently serves on the board of directors for Transact Bank, NA.  He is a former officer and board member of the Rocky Mountain Turnaround Management Association (TMA) and the Mobile Home Park Owners Association of Colorado.  In addition, Mr. Feehan has served and volunteered for numerous non-profit organizations.