KG Contracting
Excavation & Grading in Williams, Flagstaff & Northern AZ
KG Contracting provides excavation and grading services for residential, commercial, and agricultural properties. Every build, driveway, or utility line depends on correctly executed excavation and grading, and our crews bring the equipment and experience needed to prepare a site properly from the first cut to the final grade. From utility excavation and site grading to land grading and full excavation and site preparation, KG Contracting handles the groundwork that determines how well the rest of a project performs.
Request an Excavation & Grading Quote in Williams, Flagstaff & Northern Arizona.
Excavation Services for Residential and Commercial Sites
Excavation services form the foundation of nearly every construction project, and KG Contracting approaches each job by assessing soil conditions, drainage patterns, and the intended use of the site before equipment ever breaks ground. Our excavation services cover everything from foundation digging to trenching, with attention paid to depth, slope, and soil stability throughout the process.
Foundation Excavation
Foundation excavation is measured and cut to the exact specifications required for the structure being built, minimizing rework during the framing phase.
Trenching for Drainage and Utilities
Excavation services also include trenching for drainage lines and utility runs, sized and sloped according to local requirements.
Pond and Retention Excavation
For properties needing water management, excavation services extend to pond digging and retention area shaping.
Utility Excavation for Underground Lines
Utility excavation requires precision, since water, sewer, electrical, and gas lines all have specific depth and clearance requirements. KG Contracting performs utility excavation with careful attention to existing infrastructure, coordinating with utility locates before digging begins to avoid damage to lines already in place. Utility excavation projects range from single-property connections to multi-line trenching for new development.
Schedule Utility Excavation for Your Property
Site Grading and Land Grading for Proper Drainage
Site grading and land grading determine how water moves across a property, and improperly graded land is one of the most common causes of drainage problems, foundation issues, and erosion. KG Contracting performs site grading to establish the correct slope around structures, driveways, and outdoor spaces, directing water away from areas where it can cause damage.
Rough Grading
Rough grading shapes the overall contour of a site before finer detail work begins, removing high spots and filling low areas to establish a working grade.
Fine Grading
Fine grading refines the surface ahead of landscaping, paving, or foundation work, producing the precise slope and elevation a project requires.
Land Grading for Agricultural and Rural Properties
Land grading also supports agricultural use, correcting uneven terrain on ranch and rural properties to improve usability and water flow. Get a Site Grading Estimate for Your Property Grading Needs Today.
Excavation Services – Major Grading or Resloping
Major grading reshapes land to a specific elevation, while resloping adjusts existing slopes to improve drainage and stability. KG Contracting handles both for residential and rural properties, correcting drainage issues, preparing building pads, and stabilizing slopes that have started to erode or shift.
Septic System Installation and Replacement
Properties without access to municipal sewer lines rely on a properly designed septic system to manage wastewater safely. KG Contracting handles percolation testing, permitting, and full installation or replacement, accounting for the slower percolation rates and rocky subsurface common throughout Williams.
Gravel or Loose Fill Paving – Install, Spread, or Scrape
Gravel remains one of the most practical surfacing options for driveways, access roads, and parking areas in Williams' climate. KG Contracting installs new gravel surfaces, spreads loose fill material, and scrapes existing gravel to correct ruts and restore an even grade.
Excavation & Site Preparation for New Construction
Excavation and site preparation combines clearing, excavation, and grading into a single coordinated phase ahead of new construction. KG Contracting manages excavation and site preparation for homes, commercial buildings, and agricultural structures, removing vegetation and unsuitable material, cutting and filling as needed, and leaving the site ready for foundation work or the next phase of construction.
Serving Williams, Flagstaff & Coconino County
KG Contracting provides excavation and grading services throughout Williams, Flagstaff, AZ and the surrounding Coconino County area, including rural parcels, ranch properties, and active development sites.
Frequently Asked Questions
What is the difference between excavation and grading?
Excavation involves removing or moving earth to create a specific depth or opening, such as a foundation or trench, while grading shapes and levels the surface of the land to control slope and drainage.
How deep does utility excavation typically go?
Utility excavation depth depends on the type of utility line and local code requirements, with water, sewer, and electrical lines often requiring different minimum depths.
What causes poor drainage after site grading?
Poor drainage after site grading is usually caused by incorrect slope calculation, inadequate compaction, or grading that does not account for the property's natural water flow.
Can land grading improve an agricultural property?
Yes, land grading can correct uneven terrain, improve water distribution, and make rural or agricultural land more usable for farming or equipment access.
How does KG Contracting handle utility locates before excavation?
KG Contracting coordinates with utility locate services before beginning utility excavation to identify existing lines and avoid damage during digging.
What is included in excavation and site preparation for a new build?
Excavation and site preparation typically includes clearing vegetation, excavating to the required depth, cutting and filling as needed, and grading the site for foundation work.
How long does site grading take for a residential property?
Site grading timelines depend on the size of the property, existing terrain, and whether rough grading, fine grading, or both are required.
Can excavation services address existing drainage problems?
Yes, excavation services such as trenching and regrading can correct existing drainage issues by redirecting water flow away from structures and low-lying areas.
Is land grading different from site grading?
Land grading generally refers to larger-scale terrain shaping on rural or agricultural properties, while site grading typically applies to grading a specific building or development site.
What happens if my property is in a floodplain?
Additional requirements may apply. Coconino County requires a Floodplain Development Permit for development within a FEMA Special Flood Hazard Area before work begins.
Depending on the project and flood zone, requirements can include elevation certificates, drainage information, floodproofing documentation, or a no-rise certification for certain work in a floodway.
Excavation, grading, construction, and other improvements should be reviewed for floodplain requirements before work begins.
Does excavation for a new home require a separate grading permit?
Not necessarily. Coconino County allows excavation below finished grade for basements and footings when the work is authorized by a valid building permit. However, this exemption does not automatically cover other earthwork associated with the project, such as fill or certain deeper unsupported excavations.
Because grading requirements depend on the complete scope of the project, it is important to determine whether a separate grading permit is required before beginning site work.
Do I need a permit to build or improve a driveway in Coconino County?
If the driveway connects to a County-maintained road, Coconino County states that an Encroachment Permit is required. If the driveway connects to a state-maintained road, an ADOT Encroachment Permit may be required instead.
The County does not require an encroachment permit for access to private roads under its stated driveway guidance.
Do I need to call 811 before excavation in Arizona?
Yes. Before digging, Arizona law requires underground utility locating and marking. Coconino County directs property owners and contractors to contact Arizona Blue Stake 811 before digging and states that notification is required 48 hours before excavation begins.
This applies even when the excavation itself may not require a County grading permit.
Do I need a grading permit for excavation work in Coconino County?
It depends on the type, size, depth, and location of the excavation. Coconino County's current Engineering Design and Construction Manual establishes requirements for excavation, grading, fills, embankments, drainage, and related earthwork.
For certain single-family residential projects, a grading permit may not be required when the excavation falls below specific thresholds. For example, the County identifies an exemption for excavations involving less than 50 cubic yards on parcels smaller than one acre, or less than 100 cubic yards on parcels of one acre or larger, provided additional depth and slope conditions are also met.
Larger or more complex grading projects may require a grading permit, engineered plans, inspections, and grading certifications.
Does being outside Flagstaff or Williams change the permitting requirements?
It can. Coconino County permitting requirements generally apply to property under County jurisdiction, while incorporated communities such as the City of Flagstaff and the City of Williams may have their own permitting requirements.
Before starting an excavation or grading project, it is important to determine which jurisdiction has authority over the property and whether the work involves a County or state right-of-way.
Does KG Contracting provide excavation for both residential and commercial projects?
Yes, KG Contracting performs excavation, utility excavation, site grading, land grading, and full site preparation for residential, commercial, and agricultural properties throughout Williams, AZ.
