I stayed at the Halekulani and the jackhammering on monday was truly awful and after an crappy weather week it was the first good day.
it kept going at 830 am every day. we checked out and left
It should be on the website of the Waikiki, Halekulani and the Royal Hawaiian as it was intense
i could even hear it in the surf.
I also have video of the noise. will try to post