Washington is beautiful and you did great.
Lovely. Love your composition only wish is for seeing the head light in front of foreground object so that the shadow would have not been casted in foreground but then this is a beautiful image any way you show it.
Some of the most beautiful night images are formed when beauty of nature is mixed with smartness of photographer to paint the foreground with a dim light or flash or at times just accidentally utilizing ambient light. If interested, look at work of one of the Masters of night, a very pleasant man in person that I have had opportunity of meeting, Eric Curry. Would be very inspiring to go through his web page and just as a sample, see how he turns an ordinary scene into a masterpiece:
L I N K 
I always had the plan to make beauty of Milky way twice by utilizing its reflection from say a body of water as you tried here but seems Milky way refrain to show herself anywhere but in the purest sky. I Must get help of photoshop next time.
Wonderful job and you must have had a lot of fun.
Keep up the excellent job.