...If homeowners are going to dig a hole or ditch more than a foot deep anywhere on their property, they must call 8-1-1 a full two days ahead of time. Utility crews will then arrive at the site and mark, through various colored spray paint lines, the location of underground utilities.
It's a shared responsibility – from homeowners and contractors to excavators and utility providers – to ensure that services are not disrupted and people are safe. That's why it's essential that you call before you dig.
-- For safety of all, everyone should heed `call before you dig' August 25, 2011 http://www.theolympian.com/