Your Go-To Sewer, Septic Tank and Excavation Contractor in Blackhawk, Colorado

We are a trusted sewer, septic tank, and excavation contractor serving the Blackhawk, Colorado area. Our team of experienced professionals are committed to providing high-quality services that will meet your needs. We offer a wide range of services, including sewer line repair and replacement, septic tank installation and maintenance, excavation services, and more. Our crews are prepared to handle any job that comes our way, whether commercial or residential. We pride ourselves on using the latest equipment to ensure that every project is completed safely, and efficiently. Contact us today to learn more about how we can help you with your sewer, septic tank, and excavation needs in Blackhawk.

Why Work with Mountain Contracting LLC

Unparalleled Experience

Boulder sewer and septic systems require local expertise, and that’s exactly what our team offers. With years of experience in the industry, we know how to handle even the most challenging septic repairs and installations.

Commitment to Quality

We’re committed to providing our clients with the best possible service. We know that a properly functioning sewer or septic tank system is critical, and we’ll treat it with the care and attention it deserves.

Superior Customer Service

We’ve built a loyal customer base by always putting our clients first. Many of them have been with us since the beginning, and we’re always happy to welcome new clients into the Mountain Contracting LLC family.


Our Services

We offer septic installation, replacement and repair. Sewer line installation, replacement and repair. Water line installation, replacement and repair. We also offer general excavating services including general land clearing, site clearings and excavating in extremely tight areas that require specialized equipment and a high degree of competence.

Septic Tank Services

We offer the full gamut of services, from septic system installation and septic tank repair and maintenance. At Mountain Contracting LLC, we've seen all septic tanks and issues, and we're confident that we can handle any challenge you might be facing.

Sewer Line Repair

Is your sewer or septic line backed up or broken? Our team can repair or replace your sewer line quickly and efficiently. We'll also make sure that any surrounding areas are properly repaired and restored.

Excavation Services

Boulder is known for its rocky and mountainous terrain, but that doesn't phase our team. We have the skills and experience necessary to excavate even the most difficult properties. Whether you need us to dig a new septic tank pit or you're looking for someone to clear land we can help.

Septic Tanks in Boulder, Co

Drain Field Services

The drain field is an important part of your septic system, and it needs to be properly maintained in order to function properly. Our team offers a variety of drain field services, from installations and repairs to routine maintenance. We also offer leach field services, which are similar to drain field services. This type of system is often used in areas with high water tables or poor drainage.

How We Work

At Mountain Contracting LLC, we understand that every sewer line project and septic system is different. That’s why we take a personalized approach to every project we undertake.

We offer sewer and septic services that are custom-made for your system, and we’ll consult with you to determine the best course of action. All within your budget!

Assessment and No Obligation Quote

The first step is to assess your needs and determine the best course of action. We'll also provide you with a no-obligation quote so that you can make an informed decision about whether or not to move forward with our services.

Contract and Permitting

If you decide to move forward with our services, we'll draw up a contract and apply for any necessary permits. We understand that the permitting process can be confusing, but we'll take care of everything for you. The local health department must approve all septic system projects, and we'll make sure that everything is up to code.

Work Begins

After we've procured the required permits, our team will rapidly get to work on your septic system. We understand that you're anxious to have the project completed, and rest assured that we'll finish it correctly and expediently.

Final Walkthrough

Once the work is completed, we'll do a final walkthrough with you to make sure that you're happy with the results. We want you to be completely satisfied with our work, and we'll make any necessary adjustments before we consider the job done. We know how costly repairs can be, so we make sure to make it right the first time.

Proudly Serving Blackhawk, CO

Google Reviews

Casey Gale
Casey Gale
Very good experience working with Matt.
Andrew Gordon
Andrew Gordon
Thank you Matt at Mountain Septic! Matt responded to my request quickly, and was super knowledgeable - recognizing the scope of work and talking me through the project when he arrived on site. Our demo, septic and foundation work all went super smoothly, and we are really happy with the quality of the work.
Joseph Ryan
Joseph Ryan
The guys at mountian contracting went above and beyond to get our job done. They provided a quality experience that I would highly recommend.
Gail Bishop
Gail Bishop
Matt arrived at my house within 30 min of my reaching out. When he measured my yard it was clear we had some problems. Matt worked with the county and got everything approved. Mtn Contracting was very efficient and professional in all my dealings with them. Even after the job was complete, if I had a question all I had to do was call. I recommend Mountain Contracting to everyone and would use them again myself if the need arose.
Melissa Dunning
Melissa Dunning
I have used Mountain Contracting for three different projects and have been delighted each time. Their ability to envision the best solution is extraordinary. Their execution of the project is efficient and quick. They are a pleasure to work with, throughout the process. They stay on budget and on schedule. I can't recommend them highly enough!
Benjamin Carano
Benjamin Carano
Mountain Contracting is one of the best businesses that I have ever worked with in terms of quality of work, communication, timeliness, and just being overall friendly and respectful! Matt (the business owner) is an amazing person who cares about the customer and makes sure the job is done right. Most contractors today from my experience care more about making the buck than they do about the customer, and often times they are in and out without really allowing you to get to know them and trust their skill. Before Matt leaves the job site, he makes sure that it is very clean and finished, and with excavation he cares about the way it will look in years to come, with replanting the grass and making sure the ground will be settled and not going to move or shift under a pipe or foundation! He cares about honesty and communication and always leaves me with a good impression of his diverse skills, and motivation to do things right!
lily getty
lily getty
Mountain Contracting exceeded our expectations with quality service and explicit care for their customers. We were given a piece of mind with our new system installation, as they spent time with us and helped us understand the scope of the work in its entirety. They worked diligently while still finding time to answer all of our questions. The work was done efficiently and we were pleasantly surprised how beautiful our yard remained once the work was completed. Matt helped us remain comfortable and confident throughout the duration of the project, and we highly recommend giving him a call.
Gary Wockner
Gary Wockner
Mountain Contracting LLC did excellent work on my Boulder County property. The septic system installation and water supply excavation was highly professional, and Matt was a pleasure to work with. Further and importantly, Matt had an eye for detail and finishing, as well as going beyond what was required to finish the job. I highly recommend Matt and Mountain Contracting LLC.

Call Mountain Contracting for All Your Sewer line Services

As a full-service septic, sewer and excavation contractor, we’re here to ensure your home or business can handle the demands of the job. With our help, your property will be ready whenever nature calls. And in the event that an emergency does arise, we’ll be there to get things up and running again as soon as possible. Simply fill out the form on our contact page or give us a call on 303-888-3580.