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gal■ November 20, 2013 11 k F Mr. Mike Tassano Project Manager City of Pleasanton ENGINEERS Engineering Department SURVEYORS 1500 Warburton Avenue Pleasanton,CA 94566 PLANNERS SUBJECT: Bernal Avenue @ I-680 Interchange Improvement Project Amendment No. 4-Additional Scope of Services Dear Mr. Tassano: BKF Engineers(BKF)has cooperatively worked with the City of Pleasanton(City) in obtaining a Caltrans encroachment permit for the construction of the Bernal Avenue at I-680 Interchange Improvement Project (Project). Per Caltrans direction, the issued Caltrans encroachment permit is limited to the roadway elements of the Project in anticipation of a rider to the encroachment permit for the landscaping and gateway elements. The City of Pleasanton also desires to complete the preparation of the landscaping and gateway features design, and process and obtain a Caltrans encroachment permit rider for these features. Based on this request, the following is proposed for the landscaping and gateway features work: Caltrans Encroachment Permit Rider for Landscaping and Gateway Features In accordance with discussions conducted with Caltrans, the review and approval of gateway features and landscaping requires a special review process and will be performed under a separate encroachment permit rider. BKF will complete the design of the landscaping and gateway features work and process and obtain a Caltrans encroachment permit rider. Determination of gateway elements is focused on a vertical ID element and the use of a low corten wall. The gateway features will need to be presented to Caltrans in a prescribed report for approval prior to their incorporation into the Project plans and specifications. The foundation design for the gateway features requires structural and geotechnical consultation, design details, and specifications. It is not anticipated that Caltrans Headquarters Office of Structure Procedures will be required for Caltrans approval and is excluded from this scope. It is assumed that the geotechnical information is limited to providing soil classification for use of UBC code allowances, and additional field exploration or reports are not required. BKF will work with the City to determine whether to incorporate this work into the current Project construction as a bid addendum, a construction change order or a separate construction contract. Additionally, Caltrans will require that a maintenance agreement between Caltrans and the City for the upkeep of the landscaping and the gateway features which can be facilitated by BKF. The level of work effort associated with the processing and approval of the landscaping, irrigation and gateway features via a Caltrans encroachment permit rider is estimated at$72,000.