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Ms. Amanda Rhinehart <br />City of Colton <br />Bridge Retrofit Support <br />February 2, 2006 <br />Page 4of4 <br />This would make the budget allowance an additional $100,000 <br />The latter two bridges are expected to be more costly to update because seismic retrofit <br />criteria has changed since the time that design of these bridges was completed. Therefore, <br />more effort will be required. <br />For all bridges except 54CO100 and 54C0101, TYLI is aware that the Engineers of Record are <br />still with their respective firms (Willdan Associates, Athalye Consulting Engineers, and LAN <br />Engineering). <br />However, for the remaining two bridges, the situation is less certain. No plans were <br />included in the information provided to us by the City. However, other documents we <br />reviewed suggest that the retrofit was designed by Sverdrup Corporation and Manna <br />Consultants. Sverdrup has since been absorbed by Jacobs Engineering, and we are uncertain <br />of the status of Manna. No conclusions can be drawn at this time, but it is important to be <br />aware of the potential complications. <br />Thank you for the opportunity to assist the City with this important project. Should you <br />have any questions, feel free to contact me or David Griffith. <br />Sincerely, <br />T.Y. Lin International <br />Gary AnWhucci, PE <br />Vice President <br />TYLININTERNATIONALI <br />