trips made by bicycle by 2020 to meet climate change goals, public health goals, our liveability goals and economic viability goals. we cannot accommodate 100,000 more residents the same way we've been doing business. we've got to change and think differently and our hope for that is to have your help in building out 100 miles of bikeways by 2020. we're not asking the dutch to help us with all 100 miles. i think we've given you three or five miles or so. we will take it, we will take the five miles. and this is why we're doing it. in conclusion, the reason i know that we can do what the netherlands has done, perhaps even better, is we have the same kind of investment. we know we're doing it for the next generation. we know that we need to do these things to make sure we're leaving san francisco a better place than how we've found it. i want to say we have all the elements in place -- the political support, the city

leadership, the public enthusiasm has never been greater. the economic need has never been greater, whether it be a need to drive tourism greater in our city or a need to accommodate the population growth. we have the urgency in front of us, as well. i will end by saying i am thrilled and proud that san francisco is such a good bicycling city. we can be a great bicycling city. we look forward to your help. i want to invite everyone here, please come and invite friends to tomorrow night's closing ceremony. as hille mentioned, we're now going to lock these good folks in a room for two days to help us come up with exciting and doable, that's important, implementable plans for mid market street, for polk street and the wiggle route through the lower haight. they'll be coming back miraculously tomorrow night at 6:00 p.m. to share their design ideas with all of us. this is open to the public.

6:00 p.m. tomorrow night at the war memorial building in the green room just across the street, across van ness avenue. please come, and you will learn what the dutch experts and what our local experts and stakeholders think we need to make san francisco a truly great bicycling city, which i am sure we can do. thank you so much for coming today. we appreciate your enthusiasm and hope to see you tomorrow night. [applause]

>> hello. you're watching the show that explores san francisco's love affair with food.

there are at least 18 farmers markets in san francisco alone, providing fresh and affordable to year-round. this is a great resource that does not break the bank. to show just how easy it can be to do just that, we have come up with something called the farmers' market challenge. we find someone who loves to cook, give them $20, and challenge them to create a delicious meal from ingredients found right here in the farmer's market. who did we find for today's challenge? >> today with regard to made a pot greater thanchapino. >> you only have $20 to spend. >> i know peter it is going to be tough, but i think i can do it.

it is a san francisco classic. we are celebrating bay area food. we have nice beautiful plum tomatoes here. we have some beautiful fresh fish here. it will come together beautifully. >> many to cut out all this talk, and let's go shop. yeah. ♪ >> what makes your dish unique? >> i like it spicy and smoky. i will take fresh italian tomatoes and the fresh seafood, and will bring them to other with some nice spoked paprika and some nice smoked jalapeno peppers. i am going to stew them up and get a nice savory, smoky, fishy, tomatoy, spicy broth. >> bring it on.

how are you feeling? >> i feel good. i spent the $20 and have a few pennies less. i am going to go home and cook. i will text message u.n. is done. >> excellent and really looking forward to it. >> today we're going to make the san francisco classic dish invented by italian and portuguese fishermen. it'll be like a nice spaghetti sauce. then we will put in the fish soup. the last thing is the dungeon as crab, let it all blend together. it will be delicious. when i could, i will try to make healthy meals with fresh ingredients, whatever is in season and local. those juicy, fresh tomatoes will take about an hour to cook down into a nice sauce. this is a good time to make our fish stock. we will take a step that seems like trash and boil it up in water and make a delicious and they speed up my parents were great clerics, and we had wonderful food. family dinners are very

important. any chance you can sit down together and have a meal together, it is great communal atmosphere. one of the things i like the most is the opportunity to be creative. hello. anybody with sets their mind to it can cut. always nice to start chopping some vegetables and x and the delicious. all this double in view is this broth with great flavor. but your heart into it. make something that you, family, and friends will really enjoy. >> i am here with a manager at the heart of the city farmer's market in san francisco. thank you for joining us. tell us a little bit about the organization. >> we're 30 years old now. we started with 14 farmers, and it has grown out to over 80. >> what is the mission of the organization? >> this area has no grocery store spiller it is all mom-and- pop stores. we have this because it is

needed. we knew it was needed. and the plaza needed somebody. it was empty. beautiful with city hall in the background. >> thank you for speaking with us. are you on the web? >> yes, hocfarmersmarket.org. >> check them out. thank you. >> welcome. the dish is ready. >> it looks and smells amazing. >> thank you. it was not easy to meet the $20 budget. i checked everybody out and found some great produce. really lovely seafood. i think that you are going to love it. >> do not be shy. cyou know this can run you $35 to $45 for a bowl, so it is great you did this for $20. >> this will feed four to six

people. >> not if you invite me over for dinner. i am ready to dig in. >> i hope you'll love it. >> mmm. >> what do you think? >> i think i am going to need more. perhaps you can have all you want. >> i am produce the that you have crushed this farmer's market challenge by a landslide. the first, we're going to have to tally of your shopping list and see what you actually spend that the farmer's market. >> and go for it. >> incredible. you have shown us how to make super healthy, refresh chapino from the farmers market on the budget, that for the whole family. that is outstanding. >> thank you peter i am glad that you like it. i think anybody can do it. >> if you like the recipe for this dish, you can e-mail us at

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... >> i am the chief building inspector. we are here at the base of telegraph hill to talk about a subject of great interest for the people of san francisco

which is rockslide, slope stability, which caused a dramatic front-page news. i am here with two knowledgeable and wonderful guests. i am here with a geotechnical engineer and a geologist. we are here to talk about rockslide, rockfalls, and related issues. what is the difference between a geologist and a geotechnical engineer? >> and engineering geologist deals with identifying site characteristics, mapping, the ground's surface, collecting all of this data. the engineer can come up with medications and designs. >> the structural engineer might

be working on a building if there is a building involved. what is your role? >> i am interested in the physical properties of the earth and how the earth will behave: subject to different load changes. when you are building a building, you are applying a load and you are wondering if the earth will be able to supply that load. we work closely together and we come up with practical engineering solutions. >> this is when someone wants to build something. also, we have a rock piece of land. we have to have a resolution. >> in the u.s., about 2/3 of the population lives in areas that are prone to landslides.

about $2 billion of damage occurs annually from landslides. unfortunately, 20-25 million people die as a result of landslides o. >> much of the coastline is either a bright red or a beige print th. >> here we are at the base of telegraph hill on lombard street. this is owned by the city. behind you is a large piece of something exposed. you are looking at a large class that was xextricated in a quarry about hundred years ago. this is a secretive sandstones, shales, accumulated debris.

essentially it ended up piled up here. the quarry activity was so intense and they used some much at dynamite that the kind of over blasted. 10 feet of the face was left shattered. you can see the fresh colors and a pile of debris which is precariously perched on the edge of a cliff up there. it is more fresh and more recent than the rest. it stands out because there's no vegetation. there is no weathering of material. those are the kinds of things you look for. >> there are many types of slides. there is the bedrock slides which we are looking at in is a combination of a block slide and where the material is just out of balance and is falling off. rainfall pushes from the ground water and out of the cliff.

as you can see, the slides artistic one of many types of landslides or slope failures. >> do we have all of these kind of failures in san francisco? >> unfortunately, we have them all. the rock from here is used from the sea wall. it came from this hill. it was a itgnoll that was present. because of this blasting that occurred, the rock is weak. while most of the time, there are times of heavy rain. sometimes, this has nothing to do with the rainfall. iraq is 50 to an old and then it

just falls. in this particular area where we're standing, we have seen the wall at the base. >> the big steel beams with the fence. this is an effective way of preventing the rock that does fall from causing damage. that might protect the bottom of the hill but it doesn't do anything over the hill. >> it has long been my understanding that the city of san francisco says and the building department takes this position that there is no one buildable lot -- unbuildable lot. i wonder if this is realistic. >> if money is an issue, we can develop solutions that will

mitigate the impact. that a solution can be eliminating the hill, that can eliminate the problem. or build a structure right into the hill so there is no longer an exposed face or bold enough of iraq together so that it acts as a big buttress to prevent further movement. -- or hold enough of the rock together so that it acts as a big buttress. we are allowing the wall of the building to act as a retaining structure. there was a time when we did not get any. there was an epic one before in 1982. we brought with us and rainfall charge. >> you were saying that this is somehow correlated to rainfall. this goes from 1914 until 2006.

it is the red line in the backgrounds which are the annual rainfall from each year is plotted on here. you can see it varies all over the place. if you take an average, the average is a thin gray line. that does not give you a feel for what the rainfall really is. that is an average over four years. you can see that these build up until we had the big events before. >> you expect to see them during the apocrine fall. in fact, they might occur at that time but they may occur the year after and two years after because it has taken awhile for it to accumulate.

this triggered some major landslides that we saw. these are portions of the cliff rotates out to sea. >> when we look at this cliff, can you tell us what of the features that we can see? >> we are lucky to have a very fresh exposure. there is a large overhanging block. at the very edge, you can see the roots coming out. they are part of the problem. in addition, these are sandstone and shale. they have been uplifted and faulted and put into the position they are in today. on the cliff face, you can see the bedding of the shale. there are vertical cracks that filled the water and plans is

growing. -- and plants are growing. the cumulative effect of the fresh cut with the debris sitting on the ledge, luckily we have a chance there to protect us from rocks going on the street. >> this is one type of rock salt and we will look at a few others. what will we see? >> i think it would be appropriate. we have been talking about rock salt. there is instability that occurs at telegraph hill. this was more in the earth flow and debris flow kind of movement. this moves downhill as a result

of the rations from the earthquake. that is where we are headed next. >> here we are on the next stop of our landslide for parent though this is the lagoon ouna a area. this is different from where we all were just add on telegraph hill. this is a whole different concept. tell us what we have to. we have the big hill behind us, what kind of formations do we have? >> this part of san francisco, we are out in the dune sands which makes up the hill to my right. a crusty old drainage that we are standing is bedrock, 160 million year-old sandstone. the project right in the hillside over there and then

farther down along the path that goes to the reservoir. >> there are rock slides, there is unconsolidated material. we have an earth float type slide and a debris flows which are common on the these hillsides where you start to see the evidence of creaks when the trees start to lean over. >> this is a slow movement of the slope. >> yes. you can start to get moving. that will push the trees over a little bit. this had a special history. we had a lot of damage here. i guess the water from leaking laguna runs underground out to golden gate park.

it covers about two or three blocks along side to seventh avenue. there was a lot of water damage we might have even had some liquefaction soil failure. we had a major failure. >> that's right. this tribute goes all the way to golden gate. this is in a mountain lake and beyond ththat, it was a surface flow. this is a reservoir. on my right is this defensive the positive dune sand. the wind blows, it comes from the ocean beach. because the sand is moving, you can see evidence along this side

of the hill in 1989. the vibrations in accelerated. you have a significant amount of movement to the point that the homes that uc had very severe damage for two blocks. we recognized what the problem was at the time, it was a matter of loose sand on a very steep slope. thank you for the effort. we were able to get federal funding and design which you see in the upper walls. the lower walls was actually billed as part of the wpa. the upper wall was built in 1991-'92. this is a concrete wall and it has rocked going through the wall that extends the distance of 80 feet beyond the wall. the next earthquake occurs, the wall is designed to resist and

the movement of the sand and allowed it to move down hill. this is a classic example of the creek and degree flow and exists all the way the area. we might see the other evidence. we have done nothing to improve the quality and the strength of the dam. >> one of the things that has come up in the policy issue over and over is that people are concerned that construction of a new building or the upper story might exacerbate these kinds of soil problems. we have extra review where we might have extra problems. it does that construction have an impact? it is a good idea to come to a peer review or a geotechnical

review process as part of determining. >> in january of this year, the california building code requires almost all of san francisco that we get geologist and a geotechnical engineer. it was a state building code rather than just the local requirements. >> as you recall, this was called the edge hill ordinance. >> is this the same kind of condition? >> this is more of the rock, all on one side and on the other side -- >> this is a combination.

>> a lot of sand hills were scrapes down and deposited to other places without being engineered or consolidated and people build on top of that. we have a whole change as the city surfaced. what is the deal with sand, is this a good place to build on? >> if you want to understand the properties and if you designed to mitigate any adverse effects of the settlement, this is the strongest. i live in the sunset, i have been doing this right on the other side of this hill. i see the same conditions exist here where we have the earthquakes and the sand shakes and it gets more dense. we