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ATTACHMENT "B" 1050 Northgate Drive, Suite 315 LTD Engineering,Inc. San Rafael, CA 94903 Tel: 415-446-7402 Fax: 415-446-7419 gdearth @ltdengineering.com November 30, 2004 Mr. Jim Kelcourse City of Pleasanton PO Box 520 Pleasanton, CA 94566-0802 Subject: Request for Additional Funding Bernal Creeks Restoration Design Contract C-03-057 Dear Jim: This request for additional funding is submitted because of decisions by the City to change the design requirements for the Bernal Creeks Restoration Project. JUSTIFICATION FOR ADDITIONAL FUNDING Revisions to the budget are required because of changes to the scope of the project as follows: 1. The diversion on upper Sycamore Creek and the new channel through the Applied BioSystems property has been eliminated from the project. This change increases the 100- year flow in the lower reach of Mission Creek and the reach of Sycamore Creek downstream from Mission Creek. The hydraulic analysis of flood elevations must be revised to reflect the flow change and the grading plans must be revised to provide hydraulic capacity for the increased flow. 2. The City now plans to phase construction of the project. This means that each constructed phase of the project needs to function independently until later phases are complete. Interim grading plans are required corresponding to each construction phase. 3. The City recently hired an amhitect to develop plans for Bemal Park. Our original scope of work did not anticipate the requirement to coordinate the channel design with an evolving park design plan. We will need to consult with the architect to develop a creek restoration plan that accommodates the requirements of the park plan. 4. The City decided to eliminate the channel restoration work along the reach of Sycamore Creek adjacent to San Francisco's water pipeline west of Interstate*680. The finished grading plans for this reach will need to be revised to crate a smaller channel providing sufficient hydraulic capacity for the 100-year flow without affecting the water pipeline. 5. Delays in completion of the design work have occurred because of factors such as delays in receiving decisions from the City about such things as the location of the channel through the Bernal Park, extended negotiations with Applied BioSystems, delays in receiving information about the condition of the culvert under the railroad tracks, additional meetings to coordinate the work with City staff, and changes in the City's project manager. C:\Documents and Settings\Glenn Dea Ah\My Documents\Pleasanton (160.001 ) Bemal Design~Admin~Scope revision.doc