We Know Dirt!


The services we provide always include our commitment to finishing the job the way you want it, in a timely manner and at a fair price. We see every job as the start of a long-term relationship; That’s why we do our best to bid your job as accurately as possible. While there are always changes in every construction project, we work closely with you to anticipate and communicate those changes to minimize surprises.

c Start of 1st Service -->


  • Site Demo
  • Clearing and Grubbing
  • Backfill
  • Retaining wall excavation
  • Curb Grade
  • Hardscape/Landscape Grade
  • Rough Grade
  • Finish Grading
  • Remedial Grading
  • Excavation and Embankment
  • Wetlands mitigation
  • Subgrade
  • Slope reconstruction
  • Import/Export of soil


  • Storm Drain Systems
  • PVC, HDPE, Fusion
  • Pump Stations
  • Media Filtration
  • Bio Retention Systems
  • Underground Detention Systems

  • Water Systems
  • Sewage and Water treatment
  • Utility Underground works
  • Storm Drains
  • Trenching

  • Recycled Water Systems
  • Purple PVC
  • Meters and Vaults
  • Backflow Devices
  • Pressure Reducing Systems

  • Fire Systems
  • Detector Check Assembly
  • In-Building Fire Riser
  • Meters and Vaults

  • Domestic Pipelines
    • PVC
    • Ductile
    • Steel
    • Meters and Vaults
    • Backflow Devices
    • Cathodic Protection

  • Dry Utility Systems
  • Television and Phone
  • Vaults and Structures
  • Conduits
  • Gas

  • Sanitary Systems
    • Pipeline
    • Manholes
    • Force Main
    • Lift Stations
    • Grease Interceptors
    • Polyethylene Liners
    • Relocations and Rehabilitation


Industrial & Commercial








Get all the Dirt!

  • 1970s

    Our Humble Beginnings

    In the late 1970s Tim started working with his dad and that’s when he fell in love with the grading business. Well known at the time for the quality of their work in custom house pads and agriculture work, Trinity Grading, Inc. quickly evolved to include more commercial, retail, industrial, and government work.

  • 1980s-1990s

    The Rental Business

    In the mid 80’s Tim bought his own blade and went into the rental business for himself. During the mid 90’s Tim moved to Washington State with his family for a year and worked for a large heavy commercial construction company putting in highways and working on airports.

  • 1990s-2000s

    Transition to Full Service

    Missing the California sun, Tim moved back to work with his dad and brother to expand operations. As the business climate evolved, Tim used his knowledge of the industry and his experience in estimating to form Trinity Grading, Inc.

  • 2000s


    Helping clients complete challenging projects through a vision of offering undeniable dedication and excellence, Trinity Grading adapts to the needs of the market in order to provide clients with exactly what they want. This has opened the door for Trinity Grading to meet a broader range of needs and offer full-scale project services.

Certificates and Important Information

  • DGS SBE No. 1367880
  • Public Works Registration No. 1000000055
  • WOSB, DUNS No. 809569796
  • Bonding Capacity: $25M Aggregate/$12M Single
  • General Liability: $5M/$7M


Our team of excavating professionals will move heaven and earth to make sure that the job gets done on time, on budget and with purpose. The team truly enjoys everything they do and take their role with your business very seriously. While others see an empty parcel of barren land, we envision your project springing up with every inch of dirt that we move.

Tim Lackey


Lisa Dufresne

Director of Operations

Jenny Lackey


Shay Dufresne

Field Superintendent

Domingo Gonzalez


Herschel 'Pete' Lackey

In Memoriam

We don't just level the playing field, we keep all aspects of our business on the level. We've built our reputation on shooting straight and following through.

Contact Us

We're ready to roll up our sleeves and get our hands dirty.
Contact us today by phone at (951) 587-6000 or by sending us a message below.
Don't forget to ask about our "Estimator's Workflow Worksheet".