Agmt11 BKF Engineers-Redwood Creek

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EXHIBIT A- BKF 59780 GL � TASK 5: Conceptual Improvements BKF will identify concept-level corrections for deficiencies noted during the Creek walk inspections. Where possible, generic concept-level Creek improvements will be selected. At three locations where significant repair is requ'ved, a site specific repair will be recommended. A concept cost will be developed for each repa'v site based on generic repa'u and unit cost items identified in Task 2 and the extent of repair identified in Task 4. Each repair area will be assigned a site number. A table will be provided that identifies a proposed improvement for each repa'v site, an associated cost and a priority. Priority will be assigned based on safety risks, risk ofadditional damage, ease ofrepair and other considerations. TASK 6: Draft and Final RepoM BKF will provide a Draft Report that provides a clear rationale for identifying, justifying, prioritizing, and costing the concept level recommended improvements and provide a basis for future master plan updates. Following City review, BKF will update the Redwood Creek Comprehensive Improvement Report. III. EXCLUSIONS Development of hydrologic models to evaluate peak flow rates is excluded. To the extent that there are existing computer models, BKF will utilize these to refine the design flow rates. A detailed evaluation of all potential failures is exc[uded from the scope of the work. BKF wil] identify locations where failure is obvious and repair now would be prudent as compazed to repairing later when conditions either have worsened or would require that repaus be made during the traditionally rainy season. At this phase ofthe project, 100-year event design flow water levels and 30 and ]00-year event overland flow paths will not be included in the analyses. If requested, evaluation of these items can ba provided as an additional service. Correcting Creek deficiencies under bridges and to bridge abutments is included in the scope of work. However, structural review of bridge structures over the Creeks is excluded. If structueal issues are observed on the bridges during the creek walks, these can be identified as a future action item for the City. If requested, bridge structural evaluations can be provided as an additional service. It is assumed that with coordination of obstructions and potential site access constraints that the field work necessary to observe the structural conditions can be completed within 80 man-hours. At this time, we are limiting the structural review to visual inspections that will be performed without the aid ofany as-built plan data. No excavations or in-situ material testing is included in the base analysis. If significant structural deficiencies are observed, more in-depth studies and material testing programs can be performed and implemented as an additional service. 3