Black Rock Underground LLC

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Black Rock Underground LLC Call Black Rock Underground today 1-503-747-9312 The technicians at Black Rock Underground, LLC are industry leaders in trenchless technology.

We have been helping diagnose, repair and replace sewers in the Portland metro area for over a decade. We’ll work with you to diagnose and develop plan to help keep your home sewer lines healthy.

Recurring water in a commercial parking lot isn’t always as simple as a clogged drain.If the same areas keep flooding af...
10/23/2026

Recurring water in a commercial parking lot isn’t always as simple as a clogged drain.

If the same areas keep flooding after heavy rain, there may be a bigger issue somewhere in the drainage system — and fixing the wrong thing can mean wasted time and money.

In our latest blog, we break down some of the common reasons commercial parking lots experience drainage problems and what property owners and managers should look for before deciding on a repair.

Read the full article here:
👉 https://blackrockunderground.com/blog-commercial-parking-lot-drainage-portland/

Licensed & Insured | OR CCB #196119
📞 Call or text (503) 747-9312
Request a quote: https://blackrockunderground.com/contact/

We’re hiring at Black Rock Underground!As our workload continues to grow, we’re accepting applications for multiple fiel...
10/12/2026

We’re hiring at Black Rock Underground!

As our workload continues to grow, we’re accepting applications for multiple field positions and looking for dependable, safety-minded people who take pride in quality work.

Current opportunities include:

✔ General Laborer
✔ Pipelayer
✔ CDL Dump Truck Driver
✔ Certified Flagger
✔ Foreman
✔ Sewer Scope Technician

If you’re looking for a long-term opportunity with a team working on residential, commercial, and public works projects throughout Oregon, we’d like to hear from you.

Learn more and apply here today:
👉 https://blackrockunderground.com/careers/

A sewer scope can raise a lot of questions — especially during a real estate transaction.But the video alone doesn’t alw...
10/09/2026

A sewer scope can raise a lot of questions — especially during a real estate transaction.

But the video alone doesn’t always tell the full story.

If you’re a homeowner, buyer, seller, or real estate agent dealing with sewer scope questions, this guide breaks down what a sewer scope inspection actually shows — and what it does not.

Read the full blog here:
👉 https://blackrockunderground.com/blog-what-sewer-scope-shows/

Licensed & Insured | OR CCB #196119
📞 Call or text (503) 747-9312
Request a quote: https://blackrockunderground.com/contact/

If you own or manage a mobile home park in Oregon, the sewer system beneath the property may be decades older than you r...
09/18/2026

If you own or manage a mobile home park in Oregon, the sewer system beneath the property may be decades older than you realize.

One backup can be a simple blockage. But when the same problems keep showing up across multiple spaces, it may be time to look at the bigger picture.

Our latest blog explains why aging park sewer systems are becoming a growing concern, how trenchless replacement can reduce disruption, and why some projects can be phased instead of replacing everything at once.

👉 Read the full article:
https://blackrockunderground.com/blog-mobile-home-park-sewer-replacement-trenchless/

📞 (503) 747-9312
🌐 https://blackrockunderground.com



If your Portland-area home was built before 1970, your sewer line may be older than you think.That doesn’t automatically...
09/04/2026

If your Portland-area home was built before 1970, your sewer line may be older than you think.

That doesn’t automatically mean there’s a problem, but older lines can come with issues that aren’t visible from the surface.

Our latest blog explains why so many older Portland homes are starting to see sewer trouble now, what materials may be underground, and when it’s worth taking a closer look.

👉 Read the full article: https://blackrockunderground.com/blog-portland-homes-before-1970-sewer-line-age/

📞 (503) 747-9312
🌐 https://blackrockunderground.com



Most homeowners don't think about their sewer line until something starts backing up, smelling unusual or draining slowl...
08/21/2026

Most homeowners don't think about their sewer line until something starts backing up, smelling unusual or draining slowly. But problems can begin underground long before the warning signs become obvious.

A sewer scope video inspection gives us a closer look inside the line so we can check for blockages, damage, root intrusion, or other concerns and explain what we find.

At Black Rock Underground, we believe homeowners should be able to see what's happening before making decisions about repairs. That means honest evaluations, clear answers, and practical recommendations based on the actual condition of the line.

With more than 13 years of experience serving Oregon and Southwest Washington, we help homeowners understand what is happening underground and what needs to happen next.

Do you know the state of your sewer? Give us a call to schedule an inspection.

Licensed & Insured | OR CCB #196119
📞 Call or text (503) 747-9312
Request a quote: https://blackrockunderground.com/contact/



Portland-area real estate agents know how quickly a sewer issue can complicate a transaction.That’s why having a sewer c...
08/07/2026

Portland-area real estate agents know how quickly a sewer issue can complicate a transaction.

That’s why having a sewer contractor you can trust matters.

At Black Rock Underground, we perform our own video inspections before preparing the bid, so you and your clients get a clear picture of what’s happening underground before decisions are made.

We help agents with:

✔️ Accurate estimates based on video inspections
✔️ Fixed lump-sum pricing
✔️ Clear repair recommendations
✔️ Trenchless repairs with less disruption
✔️ Faster turnaround when timelines are tight

With more than 13 years of experience, we’ve worked with hundreds of agents across the Portland metro and Southwest Washington.

We answer the call, explain the options clearly, and help keep the transaction moving.

Licensed & Insured | OR CCB #196119
📞 Call or text (503) 747-9312
Request a quote: https://blackrockunderground.com/contact/



Did you know summer is one of the best times to address drainage and site issues before the rain returns?When grading, c...
07/17/2026

Did you know summer is one of the best times to address drainage and site issues before the rain returns?

When grading, culverts, or surface water systems aren’t working properly, heavy rain can lead to erosion, standing water, driveway washouts, soft soil, and property damage.

Black Rock Underground helps homeowners and property owners identify and correct drainage concerns with practical site solutions built for long-term performance.

✔ Grading concerns
✔ Surface water management
✔ Culverts
✔ Drainage solutions
✔ Site corrections

Don’t wait until the next storm exposes the problem. Summer is a smart time to get ahead of it.

Licensed & Insured | OR CCB #196119
📞 Call or text (503) 747-9312
Request a quote: https://blackrockunderground.com/contact/

As the Fourth of July weekend approaches, we’re reminded that strong communities are built on reliable infrastructure — ...
07/03/2026

As the Fourth of July weekend approaches, we’re reminded that strong communities are built on reliable infrastructure — much of it below the surface.

At Black Rock Underground, our team works on the sewer, drainage, grading and site solutions that help protect properties and keep projects moving.

From residential repairs to commercial and public works projects, we take pride in doing the work right from the ground up.

Wishing everyone a safe and enjoyable Fourth of July weekend.

Licensed & Insured | OR CCB #196119
📞 Call or text (503) 747-9312
Request a quote: https://blackrockunderground.com/contact/

Did you know culverts play an important role in protecting your property from water damage?When a culvert is blocked, da...
06/26/2026

Did you know culverts play an important role in protecting your property from water damage?

When a culvert is blocked, damaged, or undersized, water can back up where it shouldn’t—leading to erosion, flooding, washouts, and drainage problems near driveways, roads, and surrounding property.

Black Rock Underground helps homeowners and property owners address drainage and site concerns with practical solutions for:

✔ Culverts
✔ Drainage
✔ Surface water management
✔ Site solutions

Good drainage helps keep water moving where it should and reduces the risk of bigger problems over time.

Licensed & Insured | OR CCB #196119
📞 Call or text (503) 747-9312
Request a quote: https://blackrockunderground.com/contact/


Address

Hillsboro, OR
97124

Opening Hours

Monday 7am - 5pm
Tuesday 7am - 5pm
Wednesday 7am - 5pm
Thursday 7am - 5pm
Friday 7am - 5pm

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