09 - Laserfiche WebLink

a n 0 City of Pleasanton a a Phase 'Z -Geometric Feasibihty Study The project limits are along southbound I-680, from 500' north of the existing southbound Bernal Avenue loop off-ramp to the 500' south of the existing southbound Bernal Avenue diagonal on- ramp, and along Bernal Avenue from Tapestry Way to Koll Center Drive, in Pleasanton, CA. The feasibility study will investigate the viability of constructing the preferred alternative recommended in Phase 1 of the scope of services based on roadway geometrics only. No other investigations are included in this scope. Task 2.1 - Doto Gathering and Project Constraints Topographic mapping for The project limits will be provided by the City during the kickoff meeting. KHA will review the mapping for completeness and inform the City if collection of additional data is necessary before advancing with the feasibility study. KHA will perform two (2) field reviews to identify constraints that might affect the horizontal and vertical alignment of the ramps. These constraints will be limited to approximate right-of-way, access, and geometric restrictions. Task 2.2 - Development of Altemafives Task 2.2.1 Code-in Original Ground Line-KHA will read-off existing contour lines and spot elevations from the topographic mapping provided by the City, and plot these elevations in AutoCAD to create a set of points to approximate the original ground elevations along the proposed alignment of the ramps. This original ground line will be used as a base to draw vertical geometrics. Task 2.2.2 Create Horizontal Alignment, Vertical Alignment, and Typical Cross-Section - A horizontal alignment, along with an associated vertical alignment and typical section will be developed for the preferred alternative recommended in Phase 1. The September 2006 edition of the Caltrans Highway Design Manual will be used as the source for geometric design standards. Task 2.2.3 Create Layout Sheets, Profile Sheets, and Key Map -Layout sheets will be created to display horizontal alignments. A 1":50' scale will be used for layout sheets. A maximum of three (3) layout sheets are included in this scope. If necessary for clarity, a key map will be created as a guide to the various layout sheets. Profile sheets will be created to display vertical olignment. A 1 ":50' scale (with a 1:10 Horizontal :Vertical exaggeration) will be used for profile sheets. A maximum of three (3) profile sheets are included in this scope. A sample of typical layout /profile sheets is include at the end of this section. Task 2.3 - Geomehic Feasibility Sfudy Technirnl Memorandum Task 2.3.1 Drofi Technical Memorandum -KHA will document the results of the feasibility analysis and prepare a technical memorandum of our findings and conclusions, along with a list of future considerations and recommended next steps. We will submit three (3) hard copies and an electronic copy of the technical memorandum to the City for review. __.. -- IV. Project Delivery 16 ~~~ ~'~ TL820087.08