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<br />AGREEMENT 1-2354
<br />Exhibit A
<br />
<br />the Transit Planning and Operations Committee (TPOC), the various design options regarding
<br />size and aesthetics for the permanentfeatures. The CONSULTANT will also be prepared to be
<br />available and to provide documents, renderings, models, etc. as required for presentations to the
<br />cities, at community meetings, and other forums as required by the PubJic Involvement Program.
<br />
<br />Aerial Structures: The CenterLine Project is expected to be primarily an aerial structure. The
<br />CONSULT ANT will evaluate several possible design options for the aerial structure'and support
<br />columns. These options will confonn to the CaJifornia seismic requirements. The options will be
<br />developed in suĊcient detail in plan, elevation, and section views so that they may be evaluated
<br />and preliminary cost estimates prepared. The options will then be ranked for cost, design
<br />attractiveness, and constmctability, with The AUTHORITY selecting a preferred design, Once
<br />selected, preliminary engineering will be perfom1ed for all aerial sections. Plans will include
<br />structure cross-section(s); plans and profiles including abutment locations, pier locations, and
<br />under-structure clearances; and preliminary abutment, pier, and foundation structural designs.
<br />Coordination with trackwork will also be included, especially for the possibility of using a thirf!
<br />rail electrification system.
<br />
<br />Retaining Walls: There are several locations where conceptual engineering indicates retaining
<br />walls will be needed. The CONSULTANT will evaluate several possible design options for
<br />standard retaining walls. The options will be developed in sufficient detail in plan, elevation, and
<br />section views to be evaluated and to prepare preliminary cost estimates. These retaining wall
<br />options will be ranked in tenns of cost, design attractiveness, and constmctability, with The
<br />AUTHORITY selecting a preferred design. Once selected, standard plans for retaining walls will
<br />be prepared for use in final design.
<br />
<br />Catenary Stmctures: The CONSULTANT will study several configurations of catenary poles to
<br />detennine the optimal type, size, spacing and cost. They will be presented in sufficient detail
<br />including brackets and wiring, so that design appeal can be assessed for in street nmning at
<br />speeds of 35 rnph or below, street running where speeds will be between 36 and 45 mph, within
<br />an off-street right-of-way (where speeds will be up to 55 mph), and for the possibility of
<br />inclusion on aerial stmcture. The possible relationship between the catenary poles and existing
<br />street lighting and traffic signal poles in street and mall mnning areas will be assessed and
<br />rendered. The various design options will be ranked by initial cost, design attractiveness,
<br />compatibility with existing poles, life-cycle costs, and maintainability. More than one catenary
<br />pole design may be selected by The AUTHORITY. Once selected, standard drawings will be ,
<br />prepared for use in further systems and civil engineering work. While foundations for catenary
<br />poles are typically drilled caissons, the CONSULTANT will identify other foundation designs in.
<br />areas where soil conditions, aerial section, or adjacent structures require them,
<br />
<br />Existing Stmctures: The CONSULTANT will prepare an engineering evaluation of all bridge
<br />structures, culverts, etc" which The CenterLine Project will cross over or under. A Bridge
<br />Evaluation Report will be prepared which recommends any repair or retrofitting needed to allow
<br />the bridge to carry the project loads, meet the latest seismic requirements, or handle stray
<br />electrical currents.
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