What is starting wages for a flagger with this company with about 6 months experience and a valid flaggers certification card?

There union

In Oregon, journeymen flaggers make anywhere from $20 to $25 an hour, depending on whether the assignment is a prevailing wage or non prevailing wage assignment. Washington journeymen flaggers make a bit more.

I'm an apprentice so im making 18.27 and hour, however journeyman make 29 an hour and depending if your a CTS and working a prevailing wage job, you could make 30+ an hour.