Crescent City — one of California’s northernmost towns and Del Norte County’s lone city — took a close-to-$1 million hit to its harbor after tsunami waves battered the North Coast earlier this week.  Harbormaster Mike Rademaker told SFGATE in a call that initial estimates put the damage from rough seas triggered by the 8.8-magnitude quake off Russia’s coast at $100,000. Now, Rademaker said, “It’s probably getting closer to $1 million.”  … [Crescent City] recorded the highest tsunami waves in the continental U.S. — up to 4 feet — with powerful surges arriving just before dawn, lifting docks off their pilings and slamming the harbor.