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Mr. Huy Ho City of Pleasanton May 25, 2010 Page 2 • Caltrans alternative design efforts: During the first half of November 2009, Carollo staff worked to provide the City with potential alternatives for the design that may have been necessary if Caltrans elected to develop the Las Positas interchange at 1 -680. While such alternatives were conceptual, Carollo was requested to review constructible options. The alternatives reviewed included:1) Fit the design within the existing easement, 2) Relocate the facility 150 feet to the east, 3) Shorten the proposed building, and 4) Design the pump station completely underground. A memorandum discussing the first three alternatives was provided on November 18, 2009. • Project schedule: In addition to design changes and requests for assistance in strategizing the best approach for obtaining the easement with Caltrans, the overall schedule of the project has extended efforts and general overhead associated with the project. The original scope of work identified a schedule of 10 months, with a bid advertisement date of January 1, 2009, roughly 18 months previous to the current schedule. The schedule has been delayed primarily due to the City's negotiation efforts with Caltrans, and without any concise breaks in the work effort, Carollo staff have continued to provide services throughout the project duration. The effect of these changes to scope is summarized in the table below. Re -use existin• •enerator $6,000 Electrical switch•ear feed modification $14,000 MCC and instrument revisions $9,000 Caltrans desi• n alternatives $4,000 Schedule extension $7,000 Total $40,000 We currently have spent approximately $49,000 over our project limit, all of which is currently being held. We still have "assistance during bidding" services that were included in our original agreement at an estimated value of $14,000, resulting in a total estimated overage of $63,000. We are requesting an amendment in the amount of $40,000 and will absorb the remaining overage of $23,000. We are very interested in continuing to work for the City of Pleasanton on this project and future endeavors, and it is very important that you feel that our request for additional budget is justified. Please let us know if you have any questions or comments. Sincerely, CAROLLO ^�^ ENGINEERS, P.C. CAROLLO ENGINEERS, P.C. 2 1 0 1 -tA °Sjilgt 4L-. Sarwan Wason — Project Manager Brian Casey — Project Engineer BC:jI pwll CamlloJDocuments& ClienOCANPIeasanton7 7967A10 /CorespondenceIClientVHoO1 docx (A)