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with the watershed, local hydrologic conditions, etc. will be documented for the study. FEMA Flood Insurance Rate Maps will be used as the basis of determining the impact of the proposed project on the floodplain. The potential changes in floodplain hydraulics due to new or additional overcrossing or ramp structures will be addressed in the floodplain evaluation. Based on the study, it is anticipated that measures, if needed, can be applied to minimize any changes in flood elevation or extent, compared to the no action alternative. Preparation of a more intensive Floodplain Evaluation Report, in the case where flood levels or changes are of concern, is not included in the scope of work. Task 4.7-Advanced Planning Study(Structures) CONSULTANT will prepare an Advance Planning Study (APS) for each of the proposed bridges and the non-standard retaining wall work. The bridge APS will be prepared in conformance with Caltrans Office of Special Funded Project(OSFP) Information and Procedures Guide Memo 3-2 and Caltrans Memos to Designers (MTD) 1-8, and will include Bridge General Plans, Construction Cost Estimates, and APS Checklists. It is expected that up to seven bridge APSs will be required. Non-standard retaining walls are anticipated to be utilized at up to four locations where room for construction is limited, bottom-up construction is desirable and/or settlement is an issue. CONSULTANT will also prepare up to one APS for the four retaining walls with the assumption that they are all Mechanically Stabilized Embankment (MSE) walls. MSE walls are relatively common, but Caltrans considers them non-standard walls requiring APSs. The work will also include providing support in preparation of the various environmental documents. A Structure Preliminary Geotechnical Report described and prepared below in Task 4.8, will be included in the APS submittal package to Caltrans. Task 4.8-Preliminary Geotechnical Report Site visits will be performed and available data will be reviewed, including geotechnical data developed for the Project. Possible geotechnical/geologic impacts and mitigation measures will be discussed on a broad basis including but not limited to slope stability, geology, seismic impacts and risk, erosion, groundwater conditions, etc. for proposed bridge widenings, retaining walls, soundwalls, cuts and embankments. Generally, the geotechnical issues relevant to the project will be presented in a qualitative manner with no specific design recommendations. Potential mitigation measures will also be provided in a discussion format. All of this will be incorporated into a Preliminary Geotechnical Report. Structure Preliminary Geotechnical Reports (SPGR) will be prepared for each bridge, in accordance with Caltrans standards, to support the APS submittals. It is expected that up to seven SPGRs will be required. Typical fieldwork will consist of a brief site visit only. The SPGR will provide an overview of the existing foundations, site geology, seismicity, and, if possible, recommendations regarding suitable and unsuitable foundation types. If appropriate, the SPGR will also discuss the anticipated field and laboratory work required to support the future Preliminary Foundation Reports and the future Foundation Reports. ATTY/AGR/2013.164/URS PROFESSIONAL SERVICES AGR REV:10-15-13 VR Pa��33 of 78