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<br />7.A <br />Page 42 <br /> <br />The Preliminary AA Report states that right-of-way costs and utilities relocation costs are <br />not reflected in the cost estimates. When will this cost data be available for review? <br /> <br />What width is required (permanent right-of-way easement and temporary construction <br />easement) for four tracks side-by-side at grade, 4-track stacked trench, and 4-track side- <br />by-side trench? <br /> <br />To minimize temporary construction easement, is it possible to provide only a single <br />temporary track (shoofly) during construction for Caltrain operation? This would be <br />limited to areas with physical constraints; please describe. <br /> <br />The track profile shows the portal's depth of 80'; is this due to the rule of thumb that <br />provides for a one-tunnel diameter of cover when the boring machine begins? <br /> <br />Please confirm whether and how trenches can be constructed deep enough to <br />accommodate existing creek crossings. <br /> <br />Please comment on the feasibility of constructing a trench under the SFPUC water <br />transmission lines that cross the tracks near Redwood Junction. <br /> <br />Please confirm that utility crossing information for Redwood City has been received by <br />the HSR team. <br /> <br />We understand that HSR staff commissioned a study comparing anticipated noise to be <br />generated by HSR operations, and noise from the existing Caltrain operations. What is <br />the status of this noise study? <br /> <br />Are parapet walls on viaducts being considered for shielding the operating noise <br />generated by the HSR wheel/rail contact, what design(s) are being considered, and what <br />percentage of the noise will be shielded? <br /> <br />Soil samples have been taken along the existing track; what are the results and <br />conclusions of the soil tests, particularly relating to technical challenges and obstacles <br />related to boring or trenching? <br /> <br />Please confirm whether preliminary operational analyses indicate a preference for <br />Caltrain tracks being located to the west of HSR tracks (in the area north of Redwood <br />City). If so, the Caltrain tracks must cross to the east side to join the Dumbarton and <br />Seaport spur rails, since freight trains will share the Caltrain tracks. Can this crossing be <br />done at grade or must it be grade separated? <br />