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Top-Rated Excavation pros in Prosser - Updated Nov 2026

Avatar for Sarver Construction, LLC
Sarver Construction, LLC
5.0(
9
)
Building Site - Preparation and ClearingBuilding Site - Preparation and Clearing - For Business

Serving Prosser, WA and surrounding areas

Approved

In business since 2022

Free estimates

Emergency services offered

"Sarver Construction did an excellent job installing a new irrigation system for our new home. They were always punctual and very professional in their work. If you need an irrigation system installed Sarver Construction is highly recommended. Manuel Pardini"
Project Photos
Retaining wall
Retaining wall
Retaining wall
Retaining wall

+3

Response time8 hrs
Response rate95%
Recommended by66%of homeowners
3H Excavation
5.0(
2
)
Building Site - Preparation and ClearingBuilding Site - Preparation and Clearing - For BusinessExcavation - Major Grading or Resloping+1 more

Serving Prosser, WA and surrounding areas

In business since 2012

Offers commercial services

"Darren did an excellent job . Arrived in a timely manner, explained options and then got to work. He came back the next day to clear the snow that had continued to fall . I would recommend him."
Response time1 day
Recommended by100%of homeowners
Cobian Excavation LLC
5.0(
4
)
Excavation - Major Grading or ReslopingExcavation - Major Grading or Resloping - For BusinessLandscape - Minor Grading or Resloping

Serving Prosser, WA and surrounding areas

In business since 2002

Free estimates

Credit card accepted

"I recently hired Cobian Excavation for a significant excavation project, and I couldn't be more satisfied with their service. From the initial consultation to the final clean-up, their professionalism, efficiency, and expertise were evident every step of the way. The team was punctual, well-equipped, and highly skilled, completing the project on time and within budget. They navigated unexpected challenges with ease, demonstrating their extensive experience in the field. Communication was clear and consistent, ensuring I was informed and confident throughout the process. The quality of their work exceeded my expectations, and their attention to detail ensured a flawless result. I highly recommend Cobian Excavation for any excavation needsâ they truly deliver outstanding service and results."
Response time1 day
Recommended by100%of homeowners
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Excavating FAQs, answered by experts

Most residential basements are 8 to 10 feet deep. You can dig deeper depending on building codes, but it does become more difficult. You’ll likely need to install stronger foundation walls and additional supports to handle the increased load. Depending on the water table, you may also need a water management system. Clay soil can support a deeper foundation than sandy soil. A structural engineer will be able to tell you the maximum, feasible depth.

Septic drain lines (or leach lines) are typically buried between 18 and 36 inches underground, and should be at least 6 inches below the surface. These pipes are perforated and surrounded by filtering materials like sand or gravel. Burying the lines at this depth helps minimize odors and allows bacteria and other biological processes in the soil to effectively treat the wastewater. Burying lines too close to the surface can cause issues unless the soil is very compact and stable.

Hardscaping often requires preparation of the ground in the area where the feature is being installed. This can include digging, compacting, and leveling the soil, ensuring adequate drainage, and removing any existing plants. The extent of preparation needed will depend on the type and size of the hardscaping feature being installed.

A perc test can take anywhere from one to eight hours to complete. The total time depends on factors like the amount of excavation required, the depth and width of the holes, and whether multiple test holes are needed. For a single hole, the process of filling it with water and monitoring the drainage rate usually takes less than an hour. Professionals can often complete the entire test in a single day. While it's possible to get results the same day, some companies may take a few days to provide the official report.

Dumpsters work best on hard, study, and level surfaces made of asphalt, stone, or concrete. If the surface is uneven or too soft, the dumpster could get stuck or tip over when filled. Keep in mind that you must obtain a dumpster permit to keep it on a city street in many areas.

The Prosser, WA homeowners’ guide to excavation services

From average costs to expert advice, get all the answers you need to get your job done.