Always have underground gas lines located before beginning any excavation activity, even when conducting minor excavation.
If you are planning to dig, call the Hawaii 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. Hawaii One Call Center will contact all local utilities to tone, mark or identify the location of underground utilities, for FREE. Mark the area where you plan to excavate in WHITE as Hawaii 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:
Homeowners are encouraged to call the Hawaii 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.
Our 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, Hawaii 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, Hawaii 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.