Easy as pie, while I don't have the exact ones for that area, simply program your scanner from 451.-470 Mhz and let her search , they will find you, even easier remove antenna from scanner and if you are sitting in front of them (figuratively speaking) lets say the crane operators they have strong usually 4 watt radios you will here very quickly , is there more than one crane ? each crane has their own channel, always usually UHF , sometimes lower UHF 406-422 mhz ,
last time I was there I noticed UHF same as in BC , so you should find them relatively easily , my experience usually pretty dull conversations cause while the crane operator is holding the load steady and the rigger is telling him where to go, they are usually spouting off about some crap . But non the less, enjoy , rigger & crane ops one channel, builders, SO (safety officer), another channel, sparky & plumber another channel. Good luck .
System = UHF simplex, on occassion they use repeaters but no so common