Thank you all for your comments and interest in how this photo is produced.
I took this photo using the in camera double exposure composite mode. For this one, I might have taken the moon first (with a 1/60s exposure) and then the bridge and city with second exposure. I was trying out different ordering of exposing for moon first or city/bridge first to see their effects.
As far as PP goes, for this photo, I did enlarge the moon by around 50% (very impressed how 24hrexposure worked this out! Very cool.). My main motivation was to size the moon to roughly the same size as it appeared to my own eyes when it's this low in the horizon. Of course this would be as I had remembered it since PP was done afterwards. As for the bright streak above the city, I am as perplexed at it as anyone here. I may decide to clone it out in my final PP of this image.
The moon was actually sitting just above, but outside of the framing for the first shot. For the second shot, I panned straight up a bit to bring the moon into the frame. The first shot was around 15 or 20 sec exposure (if I remember correctly) with same amount for in camera long exposure noise reduction. So I am guessing it might have been 1 min or so between the first and second exposure.
If I were to shoot this in portrait orientation, the moon would have been inside the frame but it would be completely blown out.
Thank you for all your kind comments. I am very fortunate to be at that location during the moon rise to capture it.
This picture is taken using the in-camera double exposure composite mode. So I am assuming the 1/60 sec must be from the second exposure metered to the brightness of the supermoon.