director ortiz: regular meeting of the tjpa. ready to call order. madam secretary, please call the order. >> i would like to note that gabriel metcalf as honest as the mayor's appointees -- gabriel metcalf is joining us as the mayor's appointees. with that,

[roll call] vice chair, you do have a quorum. item three, communications. i know of none. item four, board of directors new and old business. director ortiz: new or old business for the board of directors? seeing none, let's look to the next one. >> item 5, executive director report. director ayerdi-kaplan: good morning. i would like to begin by welcoming the newest member of our board, director metcalf. welcome. he is the mayor's recent appointee. thank you for being with us. next, i would like to just said that as of june 2011, over 900,000 workers have been employed on the demolition and construction of the project, so that certainly shows stimulus is working. we are pleased to report that

today. i also wanted to report that we are in our third year of our summer internship program, working with high school students. we have three that were hired by urs to work with their program office as well as the tjpa office. two students are from the san francisco unified school district and one is from the high school. with the organization has six interns working on the project, and as you know, we require all of our contractors to work with interns from high school throughout the bay area as well as colleges. that has been working very well. in fact, one of our interns is here today with a spirit with respect to transit center design, we are moving forward, working on our 100% construction document, which we hope to have completed by the first quarter of 2012. most of our activities now are focusing on a construction, which we will report on momentarily.

with respect to the temporary terminal, our link facilities manager continues to meet with greyhound on a regular basis to ensure that operations are running smoothly. they did provide additional staffing and security for our san francisco pride parade on sunday, june 26, and everything went well. they are closing out -- mcgwire and hester will be closing their contract soon, and we did issue a letter authorizing final intention release. with respect to the wealth component of the program, we continue coordinating with caltrain, and i'm pleased to report that all the designs made by high-speed rail have been accepted by the rail authority. so that is good news. we did reach final comment resolution on the dual board report prepared by parsons. the final report was submitted on june 29. our station is designed to

accommodate dual mode operations as well. now, i would like to have our construction of date, but what we have been doing as well as what we plan to do over the next number of months. >> good morning, directors. i am with turner construction providing the construction management oversight. there it is. thank you. this morning, i would like to provide our normal construction of date and also give you more details about what is coming up the next couple of years, which is the majority of the buttress shoring and excavation work. on the demolition site, the contractor -- the contract was substantially complete in june, meeting the revised schedule of the demolition with the original terminal and the bus ramps all cleaned up, and they

moved on to the demolition of the additional building. they are also working on abatement of two of the four additional buildings. one of the additional buildings is actually down to the podium that today, and they will be finishing that up this week and next and starting on the next two buildings on howard street. in addition, they spent time this last month working with the artists on the sculpture, helping to do some of the initial shaping on those pieces that have been staged on the central area of the project. on the utility relocation site, a lot of information on this slide, but i have highlighted the dates of completion, as we reported before the initial five packages on the utility's should wind up before the end of the summer with most completing by the end of the month. we are still on track for that. that includes the water relocation on howard and beale,

the store relocation, and 4.5.1 is just about done. there are slides of them repaving. water and sewer location is well under way for the end of july finish. and the water and sewer on natoma and first streets is going into the middle of august. the final package, which will start next year, is water system on mission street. that was just released i believe last month or the month before, and they are working on some models and the long lead time for that. -- they're working on submittals. finally, the screen while we build to the north of the project, the eastern end in front of the 301 mission building is completed. they will be cleaned up this month, but the drive was reopened at the end of june, and

a couple of modifications to it under way, but in general, it looks great, and they are pleased with it. that opens the drive way back up and gives them back some of their valet parking area. on the transit center proper, the contractor continues to work on pre-trenching and getting set up to study buttress work in the eastern zone at the end of the month -- at the end of august, and the shoring wall. all of which i will explain a little bit more as we continue to go through. suggest -- so just some pictures to bring you up-to-date. the shop on the right is the end of june. the picture on the left is the end of may. the big thing to note is the contractor completed their drilling had. that is the concrete area filled in in the upper right hand corner of the right hand picture. that gives them a level, clean place to set up for their buttress drilling. that is the area of the buttress that will be going in.

the equipment on site, talk about it in a minute. the rest of the site they continue to put together shoring wall beams. they are about 1/3 of the way through with the number of beams. they need over 800 for the entire 30-foot shoring wall. they are about 1/3 of the way through putting this together. you can see the additional work at the far west end. they started doing pre-trenching on ministry and some work on anchor. you can see they are mobilizing their second shoring wall brick. they have started a test panel with that rig this past week. that is a shot clean out to the bay going south from the project where we remove all the ramps. really no change other than the demolition contract finished up by removing the tree, and now, the bse contractor has been able

to relocate their office trailers out there and set up so they can work on the west end of the project. as i said, there is some remaining demolition of the additional building. this slide shows the basic schedule of when those will all be done. we plan to have the final building them by the end of august. that will allow this area -- there is one archeology pit that needs to be completed in this area. for the most part, the bs &e contractor will be able to move in at the end of september. just some shots of natoma coming down. it ended up being more of a thick-frame building then we envision, but it came down rather easily in about four or five days, and they have been removing the debris pile for the past few days, and there is a one-story concrete deck they have been working on. shaping the piece is for the hawkins and artworks -- shaping the pieces for the hawkinson

artwork. the utility location continues to work. these are some of the tougher areas they continue to work this past month. that is beale and howard and the effort that goes into that. the work under second street at the end up -- of natoma. as i said, ministry repairs were completed this last june. there is a picture of the screen wall that was finished. as far as the bay area labor, we are still at over 80% coming from the bay area on the 52,000 hours that evans brothers has completed. about the same -- 84% on the 31,000 hours completed thus far by the trade contractors working for webcor/obayashi. this is where i want to move into a little description of what is happening over the next

two or three years. bse stands for buttress, shoring, and excavation, and that is what the scope of their work is. it really consists of four primary components. the pre-trenching component to clear away the shore wall itself. the buttressed in the eastern zone. and the actual excavation. in the process of doing the excavation, they will install traffic bridges, both to maintain the traffic on the three main streets -- fremont, first, and feel -- as well as a trestle bridge, which i will show you down in the middle of the site -- fremont, first, and beale. the first that is the pre- trenching. that has been going on since june. they are removing the top 10 to 15 feet of soil to remove any debris and soil that we suspect from previous construction and the earthquake debris and everything else that has been thrown in there, making sure

that the utilities have been relocated as advertised and getting ready to place the shoring wall. here are some shots of some of that work going on this last month. the one on the left is behind natoma, where they are taking the asphalt off in preparation for the pre-printing. you can see the reason for doing this is to find the constructions in the picture -- you can see some old woodpiles that were not supposed to be there. as i said, the work began in june. it is a regular shift, working monday through friday. some we can work is necessary to keep up, and typical ours is a typical construction date. the next component is the shoring wall itself wallcdsm, which it -- or cdsm, which

stands for cement deep shoring mixing. about 3300 lineal feet of this, and this is where the beams getting put together get dropped vertically into it, about every four feet. what it allows us to do is then breaks off the bat. as we dig down, we will add across bracing, and it also holds back the water from entering the site, so we only have to do the local de-watering within the footprint of the excavation. some shots of them do in the test will section in order to convince us all that they have the right mix designed for both permeability of the water and the strength of the wall. they did a test wall section, completed that on june 18 in eastern zone. we are waiting for the 20-day care of that. that is this friday. it will start taking core samples and verify the strength

of the wall and be able to move on to the production will shortly. you can see this moves on to about the middle of next year. again, this work will be monday through friday for the most part. might be some we can work if we need to accelerate. it is atypical the ship, although the plan to work a long ship because once you get the equipment going, it is difficult to stop at any one point -- it is a typical day shift, although they plan to work a long shift. the buttresses are designed to protect the money and power during the excavation. it is made up of 207 interlocking 7-foot diameter 240-foot shafts. i want to show you pictures of how those get drilled. that is basically the layout. the top of the picture would be the millennium property, the 301 mission property, or the south wall of their property on the

western side, on the fremont street side. just shows you how the math is developed by the buttresses to support the millennium property next door. so the first 50 feet of the buttress is sort of the week concrete that gets dugout. so here is the equipment that is used. the item on the left is called the rotator. 2,200 millimeters. it allows them to do a seven- foot diameter bore straight down. the equipment on the right is what feeds into the casings of the rotator. the object that is hanging is literally called a grab. it goes down into the seven-foot casing, pulls out the mud and dirt and soil and eventually the rock at the bottom as it did

down. how this process works is the rotator will set up in the location of the whole, and load a 20-foot section of casing that has teeth on it into the rotator vertically. that is the picture on the left. the rotator will literally spend the casing and drilled it down into the ground with hydraulics. it pushes it as it drills until they reach the required debt, which, as i said, is about 240 feet, into bedrock. once the whole -- hole is cleaned out, they put concrete in for the entire length and pull the casing out as the concrete is that in. you can imagine, 240 feet down, there is a tremendous amount of pressure. during the drilling operation, even when they are not actually trying to drill further into the hole, they have to rotate the casing. whether it is every hour or every 15 minutes or a couple of times in the middle of the night, they will have to rotate

the casing. we will talk about that in a minute, but that is due to the fact that they are 240 feet down of a steel casing, and they cannot afford to have that lock up or freeze up because of the pressure. they will be using two rigs at the same time, two 10 or 12-hour shifts, and a swing shift that will go back and forth in an attempt to get back to -- we plan to have a production rate of 2.5 shafts completed per week, which runs the schedule out to 83 weeks. that is a total of 207 shafts in 83 weeks, which gets the work done in april 2013. we plan to start this on august 29 with the first hole getting started that day. again, as i said, the two shifts during the day, there will be a need to rotate the casings

throughout the weekend. the drillers as if they are above the halfway mark, they can probably leave it and not turn it in the middle of the night or on the weekend. if they are below the halfway mark, certainly, they will have to come in and rotate. whether it is every 15 minutes or once an hour or every other hour. another feature of the work is the traffic bridges and the trestle bridge that will run the length of the project. basically, the objective is to maintain traffic on first, fremont, and beale street, with a minimum of three lanes and the pedestrian lanes. in addition, in the east/west direction, there will be a 30- foot trestle bridge to allow them to have equipment operating to assist with the excavation process.

this shows you the layout of the trestle bridge running the length of the project, and also, you can see the cross lot bridge. they basically need to bring all the soil up through those cross braces using a crane up on the trestle bridge to do the excavation. they can go about 15 feet at a time, and then they start putting the bracing in. this is the actual excavation running from early next year, second quarter of next year through the end of 2014. they will start at the west end and work towards the east. that is primarily because in the east, we are still doing debauches pile doing the buttress piles. as i said, there are five levels of live skit that need to be incorporated at each one of those various levels.

right now, the plan is to conduct the excavation in two shifts. with the bracing going on basically during the regular daytime -- there would be some noise associated with that. be welding. possibly welding on the lot ships. it depends on the schedule. just to put that information in a graphic -- here we are on an july 2011. that is the intersection on the north side so we can do the assuring wall on the east but chris. by october, the shoring wall the east end should be completed. that is the blue. the retrenching will be pretty

much completed around the west end. and in january, the cdsm wall pretty much complete. it allows us to continue construction on the west and. then we start working on the traffic bridges. in july, the plan is to have all the traffic bridges in. you can see the excavation proceeding all the way up to be buttressed area. by the beginning of 2013, the excavations are complete down to fremont street and to be buttressed area. it is completed, and the excavation is finally complete

in 2014. the thing to note is in the west and, the whole excavation has to be complete before they can start the foundational work. this is just focusing on the work. so, if i can answer any questions? vice chair ortiz: are there any questions? director kim: we are starting to get information about this from the residence. if you could talk a little bit more about the sound of the rotating casings? >> sure. in reality, the sound of the casing rotating is minimal. is a high rpm diesel engine. it would be comparable to comparablea bus revved its

engine. i do not know if that is considered low or high frequency. the noisiest pop -- the noise is part of the operation is when they inject air and then have to do that fairly quickly. they take the case in al. they set it aside fairly quickly. the current plan, the ideal situation is all that concrete is place in the morning. what we consider a swing it shipped until 8:00, 9:00, 10:00. no promises. they may push that. the thing to remember about concrete pouring is once you start, you cannot stop. we are not allowed to add a joint in any of these buttresses where the concrete hardens and you add it later. you cannot do that with this.

it takes eight hours to 10 hours to pour. the plan right now is to get all those started in the early afternoon and finished them before the late hours. director kim: you think that could happen once an hour on the graveyard shift? >> the worst case we heard so far is a couple times and our. i was on a phone call with a driller last night, he reiterated that they may not have to do with all, but sometimes every few hours. director kim: my next question was -- this will primarily be covered during day shift? >> i might have confused you there. the excavation will go on in two ships. that will be day and swing. swing those into the 11:00 hour.