Overview
Within large-scale excavation projects, multiple utility lines may intersect the site. Required hand digging near lines adds substantial time, cost, and risk, and is even more difficult and time-consuming in cold weather. Hydro excavation is quick, reduces or eliminates associated risk, and can be conducted year-round.
The Challenge
OSHA 29 CFR 1926.651 requires “hand digging” in conjunction with detection equipment within 18” of a utility line. In the context of a major construction project with multiple utility lines on-site, this labor-intensive requirement can add considerable unplanned time and cost to the schedule. In addition, even though hand digging reduces line damage risk over mechanical excavation, damage and worker injury risk still exists, particularly when utilities can’t be precisely located (FHA Site Characterization). Tough soils, compacted gravel/rock fill, or winter freeze conditions can further extend the time required to properly clear around underground installations.
The Solution
Hydro excavation X-Vac’s powerful hydro excavation trucks feature both adjustable high pressure water delivery systems to cut away line overburden and powerful vacuum systems to remove the resulting slurry, all without the risk of utility damage. Cutting nozzle options and available boiler systems make short work of tough soils and keep the unit running even when the ground is frozen. With dig wand and vac hose extensions, just one or two workers can often operate the system from outside of the excavation pit, adjusting boom hose position and water flow using a standard wireless remote. Throughout the process, dirt is diverted into the debris body, eliminating the need for site spoils removal. Techniques such as Tophatting, where spoil is diverted to a vacuum box and hauled out separately to dump once full, can extend on-site time.
The Results
- Zero Utility Strikes: precise and impact-free excavation prevents damage to existing infrastructure, avoiding costly repairs, project delays, and customer service interruptions
- Enhanced Safety: significantly reduced risk to workers and nearby personnel
- On-Time Completion: no schedule interruptions, thanks to X-Vac’s all-weather construction and accessories, as well as fast debris removal and offload features
Note
Hydrovac equipment must always be operated by a properly trained and competent worker, following all safe work practices and documented procedures for this type of equipment
