it liquefied in 1989 during the loma prieta. it was similar to what happened in the marina. >> as they move along and developed treasure island, the developer also has to provide stabilization programs. >> the sand has to be strengthened so that it will not liquefy. the buildings have to gain support below the sand in more confident material. >> we were talking about the waterfront. here's the very building. here is the intersection of the water and the land. the area where the ferry building is now was what? >> it was silt. to create the embarcadero, they had all of this exposed rock. they decided to mine telegraph hill for the rock and build a levee and bill in behind the levee. they blasted the rock. it was illegal but they did it anyway. they took the rock and built a rock dike all along here. beneath the fill the latem are of this mud with the consistency of jello. that layer may be as thick as 110 feet. >> is bad dyke founded on the mud -- is the dike founded on the mud? >> it is. when they dumped the rock into the bay mud

one on october 17 in commemoration of the loma prieta earthquake in 1989. the department of emergency management is partnering managementkqed -- partnering with kqed to present a symposium that will feature a keynote from fema's deputy administrators and will additionally include a panelist discussion and question and answer session from the audience regarding the aspect of whole community preparedness and disaster recovery itself. that will take place beginning at 8:30 on the 17th, as i mentioned before, here in city hall, and it is by invitation only. the second event we also have coming up is the fourth annual great california shake out, the drop, cover, and hold drill that will be held on october 20 at 10:30 a.m. right now, we have slightly over 290,000 attendees registered for that particular drill. we would like to exceed our number from last year, which was 350,000. we are looking this year to cap off at about 375,000. we would appreciate any help you can give us from your department level in creating back milestone -- creating that milestone. thanks

in 1989, five after the loma prieta earthquake, 20,000 people gathered in golden gate park for a specialor the bay area. >> just to feel the unanimous response from the whole city, from these thousands of people around us, is a fantastic feeling of unity and togetherness. [ applause ] >> narrator: and, on the one-year anniversary of 9/11, a memorial concert featuring violinist joshua bell. [ somber music plays ] >> we thought there might be 500, 1,000 people that would show up for this afternoon concert. we had nearly 10,000 people hanging from the rafters of metreon, occupying every square inch, just to remember. [ orchestral music plays ] >> narrator: intent on being a symphony for all, concerts continue to reflect the rich diversity of the bay area. [ up-tempo music plays ] >> the fact that the san francisco symphony has this type of music and has this type of event really is validating to the chinese community. and it's an invitation to get involved in that musical world, because music is so universal. involved in that musical world, because music is so universal. [ mid-tempo music p

the need to better serve the chinatown neighborhood was further necessitated by the 1989 loma prieta earthquake. project has been fiscally reviewed for years by the federal transportation authority under the new starts program. it has a fully committed funding plan and enjoys broad, federal, regional, and local support, including from the obama administration and senators feinstein, boxer, and leader pelosi here once opened, the light is projected to be the highest writer ship line in the city as it will serve the jobs housing quarter with the highest projected growth in the city, south of market, and the mission bay. first of your construction projects are nearly complete, and one of the largest -- a $230 million guideway tunnel contract is scheduled to begin later this month. by the way, it came in $13.2 million under the engineers estimates. now is the time to support the city's goal of enhancing our infrastructure system and building the need of capacity for our system. our mta will be submitting its final breath agreement request to the federal government before the end of this

reborn as an adjunct of the western addition with the dismantling of the central freeway after loma prieta-aened the reinvestment within hayes valley is now becoming this kind of chic area which i hope disp not lose its populism. lower haight is a wonderful help place, but it has suffered because of crime, i believe, and some of the economic downturn that we have noticed post dotcom implosion. upper haight has always been just a mecca. it deserves collective attention in making sure haight ashbury is not compromised but also an area we want to make sure is accessible for all. cole valley neighborhood, you know, to haight, is a bit of a hamlet, an enclave near the haight, in between there and ucsf and inner sunset. inner sunset, it's just a great swing area. what i mean by that is you just have such a great combination between merchants and residents, mass transit hub, a lower pac heights, certainly wants to enjoy the prosperity of pac heights but not want to lose its diversity that spills over from the fillmore western addition area. north of pan handle is a composite of everything i have just s

. >> reporter: watching his workers work, he remembers watching the bridge at the loma prieta. >> i starteding what you guys need was a gorgoile. >> reporter: and an iron smith and placed it on the bridge. no one wanted to be the first to ask him to move on. >> what we're talking about here is folklore but it is important. >> reporter: the cardena bridges has rags the dog and he's been protecting it for more than 50 years. the memorial sits under the new bridge. >> these towers are like gigantic redwood trees. there are spirits lurking and they are protecting us and they can put us in peril. so our mascots are there to protect us. >> they felt like they wanted to do something beyond everything they were doing to make the bridge strong. something spiritual. >> reporter: commuters can't see the 18-inch troll hanging off the northern side of the old bridge and with the construction of the new span, the iron creature has received an eviction notice. caltrans is talking to museums. there are other ideas for the troll. >> i think it should move. i think it belongs on the bridge. >> reporter: to c