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AGREEMENT 1-2354 Exhibit A PE io. Preliminary Engineering of Traction Electrification System It is the purpose of this work task to prepare 30% drawings and specifications for the traction power and power distribution system and to develop detailed recommendations on cOITosion contro \. CONSULTANT will review all related work in Conceptual Engineering and perform investigations to determine the locations of all potential primary power sources along the CenterLine project. The CONSULTANT will develop a prototypical floor plan and equipment list for the traction power substations and work with those performing the architectural design of a standard substation, Using the recommended location of the traction power substations from the earlier study and working with the station designers and The AUTHORITY staff, the CONSULT ANT will detennine the optimal final locations of all traction power substations based on cost, land availability, and neighborhood intmsion, The CONSULTANT will prepare 30% designs and specifications of all traction power substations along the line. ' , CONSULTANT will develop the standard design for a mounted third rail system for The CenterLine Project. In conjunction with this design, the CONSULTANT will evaluate the feasibility of an embedded power strip, or a hybrid of options such as electric fuel cells or batteries. This feasibility study will be completed within 120 days after the NTP, in order that The AUTHORITY and the CONSULTANT can make a recommendation to the Board and the AUTHORITY'S TPOC electrification system, CONSULTANT will also work to develop standard design(s) for catenary poles within 120 days after the NTP, for The CenterLine Project. The CONSULTANT will evaluate the overhead catenary system from the traction power substations to the vehicle pantograph, considering three distinct types of distribution systems: simple catenary, twin contact wire system, 2nd single contact wire with parallel feeders, To the extent practical, the use of a single wire contact system supplemented by underground parallel feeder cables will be used for locations where càtenary will be used for The CenterLine Project. This will be especially important where the CenterLine project borders residential or is in street nmning in a visually sensitive environment. Where the catenary system is used in design it is to be, in general, auto-tensioned along the line. Care will be exercised in locating and minimizing the visual intrusion of any auto-tensioning poles and weights, Where special trackwork requires the train to travel 35 mph or less, the use of. a system of single wire contacts is encouraged to minimize visual clutter. In the CMF, the catenary system can be a single wire contact system fixed tensioned to adjacent structures if third rail is not used, In all situations, emphasis tlu'oughout the project will be on minimizing unnecessary visual intrusion, CONSULT ANT shall prepare standard drawings and 30% drawings of the power distribution system as well as tables detailing the quantities and specifications of all its components, 42 ~- -~~.... C5l- v/