During the last ice age, were there ice bergs in Puget Sound and the Strait of Juan de Fuca?
No...and yes. 20,000 years ago, ice covered everything between the Cascades and Olympics. Those glaciers were thicker than five Space Needles, more than 3,000' thick! The glaciers melted and retreated about 13,000 years ago, leaving the Sound and probably some ice bergs...but not for long...and certainly not now.