Always have underground gas and utility lines located before beginning any excavation activity, even when conducting minor excavation. And that includes:
If you are planning to dig within your property, call the Hawaiʻi One Call Center at least five (5) working days before you dig by dialing 811. Be sure to give them the address and location of the cross street(s) nearest where you plan to dig. Hawaiʻi One Call Center will contact all local utilities to mark or identify the location of underground utilities, for FREE. Be sure to mark the area where you or your contractor plans to excavate in WHITE as Hawaiʻi Gas uses yellow markers (paint, ribbon, stakes, etc.) to mark our facilities.
Safety is everyone’s responsibility. Any excavation in the public rights-of-way (the strip of land over which facilities such as highways, power lines or utilities are built) or on private property not exclusively owned by the excavator must adhere to the following procedure:
Just like contractors, homeowners are encouraged to call the Hawaiʻi One Call Center at 811 at least five (5) working days before they start any type of project involving excavation, including planting a hedge or installing a mailbox, fence, sprinkler system, deck, or pool, etc.
Hawaiʻi Gas’ pipelines are made of steel or high-density polyethylene, and are as large as 16 inches and as small as 1/4-inch in diameter. Wherever possible, Hawaiʻi Gas buries pipes with yellow warning tape; however, all underground facilities should be treated with caution. Never assume a pipe is abandoned – at times polyethylene pipe is inserted into an older steel pipe. On O‘ahu, Hawaiʻi Gas posts yellow warning signs along our high-pressure transmission pipeline from Kapolei to Pier 38.
Residential customers should have their piping checked once every five years and commercial customers should check their piping annually.
