Frequently Asked Questions

Rough grading shapes the site to general elevations and removes large material, while final grading creates smooth, precise surfaces ready for construction or landscaping. Final grading also focuses on proper drainage slopes to direct water away from structures. At A.M.C. Excavation, LLC, we plan both phases to meet site plans and drainage requirements.

Proper site preparation establishes correct slopes and base elevation, which directs stormwater runoff away from foundations and prevents pooling. Poor grading can cause water to collect near structures, leading to erosion and foundation issues. We integrate drainage planning into every excavation and grading project to protect properties long-term.

Install a French drain when water pools near foundations, basements stay damp, or yards remain soggy after rain. French drains redirect groundwater through perforated piping surrounded by gravel, preventing erosion and structural damage. They're especially effective in Yonkers, NY, where clay soils and sloped lots can cause persistent drainage problems.

Cost depends on soil type, excavation depth, site access, and the amount of material to be removed or relocated. Rocky or clay-heavy soil requires more time and specialized equipment. At A.M.C. Excavation, LLC, we assess site conditions during planning to provide accurate expectations and avoid surprises.

Water lines typically require 3 to 4 feet of depth to stay below the frost line, while sewer lines need proper slope for gravity flow, often 2 to 4 feet deep. Local codes in Westchester County may specify exact depths. We follow code-compliant excavation practices and coordinate placement with utility providers.

Yes, improper grading causes water to pool under or around concrete, leading to cracking, settling, and surface erosion. A well-graded base with proper drainage extends the lifespan of driveways and prevents costly repairs. We prepare driveway sites with compacted base material and drainage-focused slopes before pouring concrete.

Homeowners often ignore early signs like standing water or soil erosion, allowing problems to worsen and damage foundations or landscaping. Waiting too long increases repair costs and can compromise structural integrity. At A.M.C. Excavation, LLC, we recommend addressing drainage issues as soon as they appear with long-term water management planning.

Erosion prevention includes controlling water flow with temporary berms, installing silt fencing, and shaping slopes to redirect runoff. We also compact exposed soil and schedule work around heavy rain when possible. Proper stormwater management during excavation protects neighboring properties and keeps the site stable throughout construction.

Compaction prevents settling, which can cause surface cracking, dips in driveways, or damage to utility lines. Proper compaction in layers ensures the soil supports weight and maintains grade over time. We use mechanical compactors and follow best practices to restore site integrity after trenching and utility installation.

A concrete slab requires a compacted gravel or crushed stone base, typically 4 to 6 inches thick, to provide drainage and prevent settling. The base must be level and free of organic material. At A.M.C. Excavation, LLC, we prepare and compact the base according to structural standards before forming and pouring.

Clay soil retains water, becomes heavy and difficult to dig when wet, and can shift or settle unpredictably. It also drains poorly, increasing the need for drainage solutions like French drains or grading adjustments. We adjust equipment and techniques based on local soil conditions to ensure safe, efficient excavation.

Replace a culvert if it's crushed, rusted through, undersized for current water flow, or causing repeated flooding. Repairs work for minor cracks or joint issues, but replacement ensures long-term drainage performance and prevents access problems. We assess water flow, material condition, and site needs to recommend the right solution.