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2.2 Aerial Mapping <br />The City of San Leandro will provide digital photogrammetric mapping for the project limits. <br />Mapping products will include an aerial photograph in digital format, plus 1"=40' scale, 2 foot <br />contour design quality photogrammetric mapping in AutoCAD format. It is assumed that the <br />Caltrans ABC process will not be required for this project <br />2.3 Field Surveyina <br />MTCo will perform field topography to supplement the photogrammetric mapping generated. <br />This field topography will consist of the following: <br />a) Perform control surveys using local horizontal and vertical benchmarks provided by the <br />City of San Leandro to a minimum of 3`d order accuracy. Control survey will be used for the <br />supplemental field topo efforts. We are assuming that the local control and vertical <br />benchmarks for the project will be on NAD83 for horizontal control and NAVD88 for <br />vertical control. <br />b) Cross sections will be measured at an interval of 50 feet extending approximately 10 feet <br />beyond the existing right of way (back of sidewalk, R/W fence, etc.) Sections will extend <br />approximately 100 feet along the streets and ramps beyond the anticipated conform <br />locations. <br />c) All topographic features within the projects limits that may affect design will be located. <br />These features include curb, gutter, sidewalks, utility poles, street lights, traffic signal poles <br />and associated equipment, fences, signs, mailboxes, driveways, ditches, culverts, manholes <br />(rim and inverts), drop inlets/catch basins (rim and inverts), and evidence of underground <br />utilities (including paint marks, pin flags, trench patches). Surveys of any utility potholes is <br />not included in this scope of work. <br />d) Surveys of existing sidewalks and driveways shall be obtained to ensure the design of all <br />conforms will meet ADA standards. <br />e) TJKM shall perform a field review of underground signal and lighting conduit, pull boxes, <br />controller cabinets and other facilities as appropriate, and will make informational notes on <br />the as-built plans as they apply to signal, signal interconnect and lighting design. <br />2.4 Preliminary 30% Plans <br />a) Layout Plans <br />Prepare preliminary layout plans showing new edge of pavement, curb, sidewalk, and median <br />islands. Layout plans will follow Caltrans plan format. Typical cross sections will be prepared <br />for each street and freeway ramp segment. <br />b) Profiles and Superelevations <br />Preliminary centerline and edge of pavement profiles and superelevation plans will be prepared <br />following Caltrans plan format. <br />ACTIA 11: I-$80/Washington Avenue Interchange Improvements Tune 2005 <br />COSL Project No. 1A4-34-007 Page 17 of 35 <br />