Get a load of the 23rd.
When the Democrats and Republicans got together in 2000 to redistrict, they had one goal in common -- to eliminate Gary Condit's district to get him out of politics (Condit represented Modesto). Richard Pombo had CA-11 (which went from Tracy to Manteca to Modesto) and Ellen Tauscher had CA-10 (which had Livermore, Pleasanton, San Ramon, Danville, Walnut Creek, Concord).
The California legislature moved Tauscher north over the river to include Fairfield, and moved Pombo west and south to include Pleasanton, San Ramon, and Danville, and way south past the end of the bay.
However, the CA-10 dips down with an odd southern bulge to include the Lawrence Livermore Nuclear Labs. So, Tauscher kept oversight over the nuclear labs.
-PJ