Flutterby™! : Changes in SF Bay

An SF Gate article pointed to the USGS report: Shifting Shoals and Shattered Rocks — How Man Has Transformed the Floor of West-Central San Francisco Bay. This looks like a fascinating piece to be read from end-to-end, with maps of how fill has altered the shoreline and depth at various locations, comparative figures of shipping needs over the past century and a half and how attempts to deepen channels a hundred years ago have caused different issues in these days of supertankers with 40' draft, and sketches of the old Arch Rock that used to be out west of Alcatraz and was blasted away in 1901.