What People Are Saying

Testimonials

Some of our customers are so happy with our work, they wanted to tell the world!

Thank you for assisting us with the tunnel inspections for Idaho Transportation Department. Dave Wilks Sr. and Grady Serrao were wonderful – assisted with every aspect of the inspection and provided valuable insight on tunnel conditions for both the concrete lined and unlined tunnel segments. Both were actively engaged, helped the team provide a thorough tunnel inspection, and were a joy to work with.

I thanked Dave and Grady for having the Covid vaccine and I appreciate you all for being sensitive to and accommodating my health concerns. It was not expected and I am sincerely touched that you all went to that effort. Thank you.

As always, it was an absolute pleasure teaming with the Rock Supremacy on another tunnel inspection effort. It was a delightful way to closeout my career. Thank you.

5 stars

The image showcases the Shannon & Wilson logo in black text on a white background, epitomizing their expertise in civil construction and slope stabilization.

I have had the privilege working with the Rock Supremacy team since their beginning over 9 years ago. Rowan Anderegg has done a superb job building and leading the company. RS is very professional and responsive to the clients needs. RS has an excellent safety program and continually trains their personnel in rope access safety issues. RS is also innovative and thinks outside of the box, it has been my experience that if there is a problem, they consider it a challenge to figure it out and solve it.  Can’t is not in their dictionary. Clients like the timely and professional services that RS provides. I would not hesitate to hire RS again for a project or recommend them to one of my clients.

5 stars

Logo of McMillen Jacobs Associates, featuring bold black and red text alongside a stylized J design, reflecting their expertise in civil construction and slope stabilization.

We engaged Rock Supremacy for a very challenging cliffside project that involved the stabilization and reinforcement of a retaining wall which ultimately required a total of ten drilled horizontal rock anchors, multiple vertical stabilization pilings and encapsulation with concrete structural reinforcement.

Even though my residential project, as large as it was to me, was of a much smaller scale than the company often deals with, it approached the task with all of the consideration and professionalism I could hope for. Notably, they were not hesitant to take on a challenging terrain even with its limited access.

From the outset, Corey Muir was very engaged in the project and with finding workable solutions. He was eager to explore alternative options for accomplishing the goals and worked diligently with my engineering consultants to tweak the design for a practical, affordable solution. Throughout the planning process, he maintained excellent communications with myself and our structural engineers. Corey was careful to make sure, prior to our final agreement, that all details were fully understood.

The company began the project exactly when anticipated. The on-site crew, David, Nate and Jules proved to be the “A” team. They are very skilled and professional. I found them considerate, easy to interact with, and flexible with regard to change possibilities. The team showed careful concern for my property and all possible avoidance of collateral damage while completing a job that involved some very heavy equipment.  When the concrete supplier was unduly delayed, they took it in stride and made the best of the situation. The job was actually finished a little ahead of schedule.

Definitely a five star rating for this group, I would be happy to further discuss my experience with anyone contemplating the use of Rock Supremacy’s services.

David Stellway

Portland, Oregon

5 stars

David Stellway
We engaged Rock Supremacy for a very challenging cliffside project that involved the stabilization and reinforcement of a retaining wall which ultimately required a total of ten drilled horizontal rock anchors, multiple vertical stabilization pilings and encapsulation with concrete structural reinforcement. Even though my residential project, as large as it was to me, was of a much smaller scale than the company often deals with, it approached the task with...
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David Stellway
We engaged Rock Supremacy for a very challenging cliffside project that involved the stabilization and reinforcement of a retaining wall which ultimately required a total of ten drilled horizontal rock anchors, multiple vertical stabilization pilings and encapsulation with concrete structural reinforcement. Even though my residential project, as large as it was to me, was of a much smaller scale than the company often deals with, it approached the task with all of the consideration and professionalism I could hope for. Notably, they were not hesitant to take on a challenging terrain even with its limited access. From the outset, Corey Muir was very engaged in the project and with finding workable solutions. He was eager to explore alternative options for accomplishing the goals and worked diligently with my engineering consultants to tweak the design for a practical, affordable solution. Throughout the planning process, he maintained excellent communications with myself and our structural engineers. Corey was careful to make sure, prior to our final agreement, that all details were fully understood. The company began the project exactly when anticipated. The on-site crew, David, Nate and Jules proved to be the “A” team. They are very skilled and professional. I found them considerate, easy to interact with, and flexible with regard to change possibilities. The team showed careful concern for my property and all possible avoidance of collateral damage while completing a job that involved some very heavy equipment.  When the concrete supplier was unduly delayed, they took it in stride and made the best of the situation. The job was actually finished a little ahead of schedule. Definitely a five star rating for this group, I would be happy to further discuss my experience with anyone contemplating the use of Rock Supremacy’s services.
David Stellway
David Stellway
Chris Madison
Professional and very courteous. When they received a bit of my mail they hunted me down and made sure it got into my hands. So nice to see kind people in this world still. Thank you!
Chris Madison
Professional and very courteous. When they received a bit of my mail they hunted me down and made sure it got into my hands. So nice to see kind people in this world still. Thank you!
Chris Madison
Chris Madison
Anthony Laitta
It amazes me how quick these guys adapt to challenging and seemingly overwhelming construction situations in the best, and most creative approach. Very smart, dedicated, hardworking group of brave workers in hazardous work sites. Not the type of work just anyone can do! Keep up the good work!
Anthony Laitta
It amazes me how quick these guys adapt to challenging and seemingly overwhelming construction situations in the best, and most creative approach. Very smart, dedicated, hardworking group of brave workers in hazardous work sites. Not the type of work just anyone can do! Keep up the good work!
Anthony Laitta
Anthony Laitta
Derrick Hough
We've been doing business with Rock Supremacy for many years now. Rowan and the whole staff are true Professionals with highly skilled employees and specialty equipment. Highly recommend Rock Supremacy!
Derrick Hough
We've been doing business with Rock Supremacy for many years now. Rowan and the whole staff are true Professionals with highly skilled employees and specialty equipment. Highly recommend Rock Supremacy!
Derrick Hough
Derrick Hough
David
When it comes to heavy foundation anchoring and stabilization projects, these guys are superb. Although the majority of the company's jobs involve heavy civil work, my project required their skills and specialized equipment for a challenging residential cliffside application. After careful review and critique of our plans, as well as assuring that expectations were fully understood, the work began on time and was completed ahead of schedule with minimal...
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David
When it comes to heavy foundation anchoring and stabilization projects, these guys are superb. Although the majority of the company's jobs involve heavy civil work, my project required their skills and specialized equipment for a challenging residential cliffside application. After careful review and critique of our plans, as well as assuring that expectations were fully understood,  the work began on time and was completed ahead of schedule with minimal trauma along the way.  In all, the job required the installation of ten horizontal deep rock anchors, several vertical piles, and shotcrete encapsulation. I highly recommend Rock Supremacy's services and would definitely use them again.
David
David
Jeff Riechmann
For the second year in a row, Rock Supremacy has supported the work of Courageous Kids Climbing. We especially appreciate the recent contribution of a climbing harness. Because of businesses like Rock Supremacy, Courageous Kids Climbing is able to continue sharing the rock wall climbing experience with people with special needs around the western US.
Jeff Riechmann
For the second year in a row, Rock Supremacy has supported the work of Courageous Kids Climbing. We especially appreciate the recent contribution of a climbing harness. Because of businesses like Rock Supremacy, Courageous Kids Climbing is able to continue sharing the rock wall climbing experience with people with special needs around the western US.
Jeff Riechmann
Jeff Riechmann
Peter Dolinka
This review is for the employees of Rock Supremacy. My vehicle broke down in front of the company location and the staff were absolutely amazing in helping me and my dad out of a difficult situation. They went above and beyond. Thank you so much
Peter Dolinka
This review is for the employees of Rock Supremacy. My vehicle broke down in front of the company location and the staff were absolutely amazing in helping me and my dad out of a difficult situation. They went above and beyond. Thank you so much
Peter Dolinka
Peter Dolinka
Kelsey Moore
We got stuck behind a rock slide today near the Oxbow reservoir today for awhile. The crew for Rock Supremacy were working hard to get us going and safely. We enjoyed watching them work and our kids hollered thank you out the window as we passed and the crew on the ground waved and smiled and it just made their day that the crew actually acknowledged them. They looked professional and were...
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Kelsey Moore
We got stuck behind a rock slide today near the Oxbow reservoir today for awhile. The crew for Rock Supremacy were working hard to get us going and safely. We enjoyed watching them work and our kids hollered thank you out the window as we passed and the crew on the ground waved and smiled and it just made their day that the crew actually acknowledged them. They looked professional and were on top of it. So much so, that I even looked up the website hoping I could apply for an office job or something. Turns out you need construction experience, dang. 🤣 thank you guys, you made my kids day getting to watch you work. They were very impressed. 👏👏
Kelsey Moore
Kelsey Moore
Benjamin Moore
I witnessed this great group of skilled professionals mitigate a rockfall just south of Anchorage, AK. We were able to make it by to our own job site further south along the narrow roadway thanks to Rock Supremacy's swift response!
Benjamin Moore
I witnessed this great group of skilled professionals mitigate a rockfall just south of Anchorage, AK. We were able to make it by to our own job site further south along the narrow roadway thanks to Rock Supremacy's swift response!
Benjamin Moore
Benjamin Moore