The Prime Buyer's Report

The definitive guide to local shopping; methodically researched, updated daily.

San Francisco Bay Area Edition

Prime Buyers Guide Earthwork Contractors

How To Find the Best Excavation & Grading Contractors in Marin County CA


Earthwork contractors in Marin County do excavation, grading, digs trenches (trenching), dirt removal, and earth moving in a way that a cut, fill, excavation, grade, trench, backfill, or tunnel can be executed, including the use of explosives for these purposes. Excavators in Marin County also provide topsoil and fill services, as well as landslide repair. Excavation is done on both residential and commercial sites to prepare them for construction, and can include removing, hauling, relocating dirt, gravel, and sand, or bringing them in. Excavation services are also done to prepare for foundations, basements, parking lots, driveways, roads, highways, and more.

The following research by The Prime Buyer's Report identifies the best earthwork contractors in Marin County and issues related to hiring them.

 

Updated December 10, 2016

 The TOP 10 Earthwork Contractors in Marin County CA

Marino Excavating Inc
(415) 491-4920
423 Cedar Hill Dr
San Rafael, CA 94903

Areas Served: San Rafael CA, Larkspur CA, Mill Valley CA, Corte Madera CA, Tiburon CA, Ross CA
Services: earthwork contractors,excavators & earth movers for excavation,trenching

Greener Excavations
(415) 730-3009
57 Maple Ave
Fairfax, CA 94930

Areas Served: Mill Valley CA, Tiburon CA, San Rafael CA, Larkspur CA, San Anselmo CA, Kentfield CA
Services: earth moving contractors & dirt haulers for backhoe & tractor services

How To Find the Best Excavation & Grading Contractors in Marin County CA 


The state of California requires earthmovers and trenchers in Marin County to have a state license such as the C12 license for earthwork specifically.  The former specialty licenses of: D19 license for Land Clearing, D56 for Trenching only, and a D43 license for Soil Grouting (including slurry trench cut-off walls and soil stabilization) are all now under this C-12 license category for earthwork contractors, or a contractor can do these activities with the broader "A" contractor license. Earthwork companies, especially those doing earthmoving or land clearing, will sometimes call themselves bobcat services, backhoe services, or tractor services due to those machines being used.

But the state license for earthwork is no guarantee that any particular earthmover in Marin County CA is doing business ethically, delivering value, or satisfying customers.

This makes it all the more significant that all earthwork and excavation contractors in Marin County CA who bear The Prime Buyer's Report-TOP 10 symbol have been cleared by our research staff as passing all the requirements for Prime Buyer's Report-TOP 10 status such as survey phone calls to previous customers to verify high satisfaction, good complaint record, verified state license, proof of liability and workers comp insurance for your protection, only employees legal to work in the U.S., and more.


 

 
 

Excavation vs Trench

Excavation is often defined as any man-made cavity, trench, cut, or depression formed by earth removal. This includes excavations for anything from cellars to highways, dirt removal to landslide repair. 

A trench is formally defined as a narrow underground excavation that is deeper than it is wide, and no wider than 15 feet.

No matter how many shoring, trenching, and backfilling jobs an excavator or grading contractor in Marin County has done in the past, they must approach each new job with complete preparation and care, and the success of excavation work is dependent upon thorough planning.  When a trenching contractor waits until after the work has started to correct mistakes in shoring or sloping, it slows down the project, adds to the cost, and increases the chance of a cave-in or other excavation failure.

Before preparing a bid, excavation & earthwork contractors should be learning as much as possible about your property site and the materials needed to perform the work safely. Things they should be assessing on your job site prior to submitting a bid include utility lines both overhead and underground, weather, location of the water table, surface and ground water, soil conditions, traffic, and proximity of nearby structures.   A trenching contractor who prepares a bid without this full assessment is more likely to charge you for cost overruns or miss your deadline.

To make that assessment, the trench contractor should be doing a jobsite study, observations, test borings for soil type or soil condition, and consultations with local officials and utility companies. Failure to do so means the excavator is unlikely to correctly determine the right cost and equipment necessary to do your project safely and on time.

Some Earthwork Contractors in Marin County Are Much Better than Others
The Prime Buyer's Report lists these contractors for earthwork in Marin County CA: Marino Excavating Inc, Greener Excavations. Other earthwork contractors in Novato, Sausalito and San Rafael CA that might still be in business include: .

 

 

Questions to Ask Earthmovers in Marin County CA 


When it comes to earth moving, excavation or trenching by C12 licensed earthwork contractors in Marin County CA, ask some questions about the abilities, experience, and credentials of the commercial trenching or residential excavators you're considering hiring.

• How long have the trench contractors been servicing Marin County?


• How many other earthmoving or excavation projects have they done specifically in Marin County, indicating how familiar or not they are with your local agencies, utilities, soil conditions, water table, and weather.

• Can the excavation companies give you names and numbers of previous customers who you can call as references? (All earth moving  contractors bearing the Prime Buyer's Report - TOP 10 symbol have already had their customer references called by research staff at The Prime Buyer's Report so you don't have to.)

• Do the earth moving companies have experience in the same kind of project as yours, such as residential versus commercial earth moving or grading?

• How does the earthwork and grading company determine pricing?


•  Can the graders and excavators vouch that all their employees sent to your property are legal to work in the U.S.? (All excavation companies bearing The Prime Buyer's Report - TOP 10 symbol have already signed an agreement to only hire documented workers.)

• Does the earth mover have active workers' compensation and liability insurance? (All earth moving companies bearing the Prime Buyer's Report - TOP 10 symbol have already shown proof of insurance to research staff at The Prime Buyer's Report.)

• In preparation for a written bid for your evaluation, what process will the excavator undertake to do a thorough assessment of the site, including soil conditions, local agencies, traffic, and more?

• Does the excavator provide written warranties for their labor beyond the 1 year warranty mandated by the state of California for C-12 licensed contractors?

• What happens if the excavator encounters toxic substances in the soil? Are they licensed and qualified to do remediation, or will you have to hire an outside company?

• How will the trenching company handle cost overruns due to inadequate planning? Do they guarantee to absorb any such costs or will they expect you to?

• Does the excavation company give any kind of guarantee of completion by your deadline date?

• How well do the excavators know their crews? Do they personally hire and train their crews, or do they bring them in from the outside on a project-by-project basis?

• How often and when do the excavators clean up your job site?


• If the excavation project is residential, will you have access to your home during the project?

When you've chosen the most suitable excavation company in Marin County make sure they are still licensed in good standing with a C12 contractor's license to perform your earth moving. (All excavation companies bearing the Prime Buyer's Report - TOP 10 symbol have already had their license verified by research staff at The Prime Buyer's Report.)

 

 

Resources About Excavation & Grading in Marin County CA 



The following is a list of trade associations and publications relevant to earthwork contractors in Marin County CA.


Associations & Licensing for Earthwork & Excavators in Marin County CA


CSLB Contractors State License Board
DCA California Department of Consumer Affairs

ARTBA (American Road & Transportation Builders Association)

www.artba.org

LICA (Land Improvement Contractors of America)
www.licanational.org

APWA (American Public Works Association)
www.apwa.net

CUIRE (Center for Underground Infrastructure Research and Education)
www.msucuire.org

Common Ground Alliance
www.commongroundalliance.com

ISP (Infrastructure Security Partnership)
www.tisp.org

NASTT (North American Society for Trenchless Technologies)
www.nastt.org

UULLA (Underground utility and Leak Locators Association)
www.uulla.org



Publications for Marin County Excavation & Grading Contractors


Grading & Excavation Contractor Magazine
www.gradingandexcavation.com

Better Roads Magazine

www.betterroads.com

Compact Equipment Magazine
www.compactequip.com

ENR California Magazine
www.california.construction.com

Equipment World Magazine
www.equipmentworld.com

RAI Magazine (Rebuilding Americas Infrastructure Magazine)
www.rebuildingamericasinfrastructure.com

Site Prep Magazine
www.siteprepmag.com

Tunnel Business Magazine
www.tunnelingonline.com


If you are looking for earthmoving, grading services or excavators The Prime Buyer's Report provides information for the TOP 10 Earthwork Contractors in Marin County within the following zip codes:


94903, 94937, 94933, 94925, 94939, 94964, 94930, 94965, 94977, 94948, 94978, 94974, 94957, 94970, 94941, 94963, 94940, 94915, 94976, 94945, 94901, 94929, 94947, 94966, 94942, 94938, 94973, 94924, 94913, 94949, 94956, 94920, 94912, 94904, 94960, 94914, 94971, 94946, 94979 and 94950



The Prime Buyer's Report provides information for the TOP 10 Earthwork Contractors in Marin County within the following cities:

Ignacio, Stinson Beach, Belvedere, Corte Madera, Marshall, Tiburon, Greenbrae, Bel Marin Keys, Olema, Belvedere Tiburon, Lagunitas, Almonte, Tamalpais Valley, Tamal, San Geronimo, Strawberry Point, San Marin, Nicasio, Muir Beach, San Rafael, Tomales, Kent Woodlands, Larkspur, Santa Venetia, Mission Rafael, Black Point, Dillon Beach, Kentfield, Dogtown, Point Reyes Station, Woodacre, Marin City, Bolinas, Mill Valley, San Quentin, Fairfax, Forest Knolls, Muir Woods, Lucas Valley, Sausalito, Novato, Sleepy Hollow, Ross, San Anselmo, Inverness, Terra Linda and Marinwood