SF History Association Talk: Underground Waterways of San Francisco

Tuesday, Jan. 25, 2011, 7:30 p.m.
Saint Phillips Catholic Church on the corner of Diamond & Elizabeth Streets in Noe Valley.
$5 admission, free for SFHA members.

From Thinkwalks:

A San Francisco History Association monthly meeting, open to the public. Joel Pomerantz of Thinkwalks will give a presentation covering hidden creeks and a nontechnical explanation of aquifers, soil hydrology, and springs with new research about the central part they played in the siting and settling of San Francisco.