Foundation Excavation Services in Lebanon, New Hampshire
Why Trust Our Foundation Excavation in Lebanon, NH?
Lebanon sits where the Connecticut and Mascoma Rivers meet, in a valley that was once submerged under glacial Lake Hitchcock. That history left behind thick, fine-grained lake-bed clay and silt across much of the valley floor — soil that holds water, drains slowly, and can be soft or unstable well below the surface.
That’s the starting point. What comes after it is where local knowledge matters.
Lebanon also sits near the Ammonoosuc fault line, where distinct rock formations meet close together rather than transitioning gradually across miles. That means bedrock depth can shift sharply from one lot to the next — soft lake clay in one spot, shallow ledge just down the street. A foundation excavation planned without accounting for that can run into wet, unstable soil or unexpected rock removal mid-project.
Along the I-89 and Route 120 corridor, from West Lebanon’s river valley to the upland terrain elsewhere in the city, we’ve excavated foundations across ground that changes character block by block.
Murphy & Son Construction Inc. has excavated foundations across the Upper Valley for years. We know what’s under Lebanon before we start digging.
Get a Quote from Foundation Excavation Experts in Lebanon, NH!
Client Experiences with Our
Foundation Excavations Contractors in Lebanon
Services We Provide
Driveway Grading and Roads
Bridges
Demolition
Equestrian Riding Construction
Foundation Excavation
Utility Excavation
What Makes Our Foundation Excavation in Lebanon, NH Efficient and Reliable?
Excavating a foundation in Lebanon starts with knowing which version of the ground you’re dealing with — not assuming it’s the same as the lot next door.
Site assessment comes first. We evaluate soil composition, water table depth, and bedrock indicators specific to your property, because valley-floor clay and upland ledge require different equipment, timelines, and dewatering plans.
From there, we confirm frost depth and foundation specifications for your project and plan the excavation approach around what the site actually presents — whether that’s managing soft, wet clay or working around shallow rock.
Excavation proceeds to the required depth and footprint for your foundation plan. Where clay soil is present, we address drainage as part of the excavation, not as a problem left for the framing crew to discover later. Where bedrock is shallower than expected, we adjust equipment and approach rather than treating it as a costly surprise.
Spoil is managed as we go, backfill is compacted properly, and final grade is set to keep water moving away from the foundation, not toward it.
Case Studies
A homebuilder near the Connecticut River in West Lebanon needed foundation excavation on a lot with soft, clay-heavy lake-bed soil. We assessed water table depth and soil stability before excavating, managed dewatering through the process, and delivered a stable, properly drained foundation pad ready for the concrete crew with no delays.
A property owner along the I-89 corridor needed foundation excavation on a lot where bedrock sat closer to the surface than the initial soil survey suggested. Pre-excavation assessment identified the shallow ledge, we adjusted equipment and approach accordingly, and reached proper bearing depth without a mid-project change order surprise.
RECENT PROJECTS
Take a look at some of our latest work completed recently. From land clearing and grading to demolition and full site prep we do it all. Scroll through the photos below to see our team in action and the results we deliver.
FAQs About Our Foundation Excavation Work In Lebanon
Will clay soil near the river affect my foundation or cause basement water problems?
It can if it isn’t planned for. Valley-floor clay drains slowly and holds water, so we assess soil and water table conditions before excavating and build drainage into the plan from the start.
How deep does a foundation need to be dug in Lebanon, NH to meet code?
Frost depth and footing requirements apply to every foundation project here. We confirm the specific depth requirement for your property and plan excavation accordingly.
What happens if you hit ledge or bedrock partway through excavating my foundation?
We assess for bedrock indicators before starting, so it’s rarely a total surprise. If rock is shallower than expected, we adjust equipment and approach, and communicate any cost or timeline impact before proceeding.
Do you handle drainage as part of foundation excavation, or is that separate?
It’s part of the same project. Given how common clay soil is around Lebanon’s river valleys, we build drainage planning into the excavation itself.
Do you excavate for both residential and commercial foundations in Lebanon?
Yes. We handle residential foundation excavation, commercial pads, and site prep across Lebanon and the wider Upper Valley.