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HydroVac How-To: A Quick Guide to the HydroVac Excavation Process

Let’s Get Started!

Hydrovac excavation is one of the most cost — and time-efficient ways to begin construction.  From trenching and potholing to daylighting and excavation, it’s a fast and safe way that gets the job done with minimal damage to underground utilities.  But, as with any construction project, there are a couple to-dos to check off before loading the tank and prepping the boom.  We’ve broken down the process in four easy-to-follow steps so you can get ready and get going!

1. Compliance

If you have an administrator who can assist you with these tasks, great!  If not, this is a good way to get your newer employees familiar with important laws that directly affect how and when you work.

  • Call ahead and learn which underground utilities occupy the site you’re working on
  • Familiarize yourself with local environmental regulations like noise reduction and waste management
  • Be aware of bridge laws and formula weights to ensure payload compliance

2. Site Prep

Because these factors have a high impact on the duration and nature of the project, bring along one or two seasoned team members to get an extra pair of eyes on the site.  It may seem redundant, but the more familiar the crew is with the area, the better the work will go.

  • Clearly mark all underground utilities
  • Know how far away from the truck you’ll be working–the farther away from the point of excavation, the more powerful the blower needs to be.
  • Clear the area
    • If you’re in a densely-populated area, install noise barriers
  • Identify the soil you’re working with
    • Consider the risk of soil erosion and prepare against that
    • If it’s winter, be sure the tank is winterized and the water heater is functional
  • Plan for water management 
    • If there’s a high-risk of runoff, factor in additional trenching into your prep time
  • Plan for waste containment and disposal
    • Be sure your debris tank is large enough to accommodate the amount of slurry you’re generating

3. Excavation

You’re almost ready to go!  Just finalize your schedule and crew, make sure everyone has what they need and knows where to go, and assign the coffee run!

  • Make sure all operators have proper PPE–safety first!
  • Clarify the specifications of the job with the client
    • You’d be surprised how many costly last-minute changes pop up because someone didn’t double-check with the contact!
  • Check the tank, hose and filters for leaks and / or obstructions

4. Clean Up

The job is well done, the client is happy and the invoice is submitted.  All you need to do is trash and tidy!

  • Remove waste to the designated dumping facility
    • Slurry can’t be used as backfill, so it’ll need to either (1) be taken to a liquid waste facility, or (2) taken to a treatment facility to recycle the water
  • Restore the site to its original condition per contract

Plan, Prepare, and Pivot

Even the most organized contractor can’t control all the elements involved in a job — there are a lot of moving parts, deadlines, and people to manage.  Our rule of thumb is "Plan, Prepare, and Pivot" — plan out the job as well as you can, prepare the equipment, site, and team, and pivot when things go wrong.  You can’t anticipate every problem, but you can help prevent them from turning into disasters with careful forethought and good communication.