FYI Cruising the Cheaspeake 4th edition by William H. Shellenberger has a chart on page 132 that lists clearances for both the north and south spans of the bridge by pier number.
Thanks to all of the subscribers that contributed to the list to help with the costs involved. If you want to show your support to the list - use PayPal to send contribution -- https://www.paypal.me/stumurray Thanks - Stu