Frequently Asked Questions

Surface patching replaces only the top asphalt layer and works for shallow damage, while full-depth restoration removes failed asphalt down to the sub-base. Full-depth repair is necessary when the base has deteriorated from water infiltration or utility trench settling. Surface patches fail quickly if underlying base problems aren't addressed.

Clay-heavy soils common in western North Dakota drain slowly, requiring larger drain field areas or engineered systems to handle wastewater absorption. Sandy soils drain faster but may need different spacing to prevent groundwater contamination. Local health departments require soil tests before approving drain field layouts because absorption rates determine system size and configuration.

HDD eliminates surface disruption when installing utilities beneath paved roads, driveways, existing landscaping, or parking lots. Open-cut trenching requires saw cutting, excavation, and surface restoration that costs more and takes longer when crossing finished improvements. HDD works best for conduit, communications, electrical, and water lines where trench access isn't practical.

Trenches deeper than four feet require shoring, sloping, or trench boxes to prevent cave-ins during pipe installation. Soil type determines how steep trench walls can be cut safely — loose or sandy soils need gentler slopes than stable clay. Proper trench safety adds time to projects but prevents collapse hazards and ensures OSHA compliance during underground work.

Crews saw cut straight edges around the repair area, excavate failed asphalt, verify sub-base compaction, apply tack coat to existing pavement edges, place hot-mix asphalt, then compact with rollers. Proper compaction prevents the patch from settling below surrounding pavement. Traffic can typically resume once asphalt cools and compaction is complete.

Frost depth in western North Dakota reaches 5 to 6 feet during harsh winters, so water lines typically need burial at least 6 feet deep to stay below the frost line. Shallower installations risk freezing and pipe ruptures during extended cold periods. Actual depth depends on local code requirements and site-specific soil and drainage conditions.

Laser equipment establishes exact grade elevations across the site, guiding blade adjustments to create consistent slope away from structures. This prevents standing water, erosion, and foundation moisture problems by directing runoff toward swales, culverts, or designated drainage areas. Precision grading corrects uneven settling and drainage failures that develop after initial construction.

Underground utilities including gas, electric, fiber, water, and sewer lines aren't visible from the surface and vary in depth and location. Striking buried utilities causes service outages, safety hazards, repair costs, and potential liability. Calling 811 before digging ensures utility owners mark line locations so excavation avoids damaging existing infrastructure.

Local health departments base tank size on bedroom count, which estimates wastewater volume from household occupancy. A three-bedroom home typically requires a 1,000-gallon tank, while larger homes need 1,250 to 1,500 gallons. Tank size affects drain field design since undersized tanks don't allow proper settling time before effluent reaches the drain field.

Commercial projects involve mass earthmoving, extensive cut and fill operations, larger building footprints, and coordination with engineers for compaction testing and sub-grade verification. Residential excavation focuses on single foundation footprints with smaller equipment and less complex grading. Commercial work also requires stricter compaction standards to support heavier structural loads and paved surfaces.

French drains intercept subsurface water before it reaches foundation walls by collecting groundwater in perforated pipe surrounded by gravel, then directing it away from the structure. They work best when combined with proper surface grading that slopes away from the foundation. Standing water against foundations usually requires both surface and subsurface drainage corrections for lasting results.