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<br /> . ~ Page 3 of 7 <br /> AIRPORT ~ Eu ene Ai ort -Parallel DATE . 5/30/06 <br /> ' Runwa Pro'ect <br /> LOCATION Eugene, Oregon AIP PROJECT NO. 3-41-0018-35 <br /> Job No. 4183 <br /> CONTRACTOR Wildish Construction Co. Chan a Order 16 <br /> JUSTIFICATION FOR CHANGE <br /> 1 Brief description of the proposed contract chan~e(sl and location(s). <br /> 2$40 - Modifications to isolation transformers in new and ezisting signs <br /> Temporarily remove the ratio style isolation transformers in 28 new signs along Taxiways P, D, C, M, and A, and replace <br /> them with non-isolation transformers. After recircuiting is complete, and the new signs are fed from the new vault, re- <br /> install the ratio style transformers. <br /> When the recircuiting is complete, permanently remove the non-ratio isolation transformers in 59 existing signs along <br /> Taxiways P, D, G, and A that are currently being fed from the old vault building. These non-ratio transformers will be <br /> replaced with ratio style transformers. <br /> 2850 - Roclcsaw rental <br /> A rock saw was rented between September 7 and September 16, 2006, and used to cut through existing cement treated <br /> base to install new electrical ducts at the intersection of Taxiways Papa and Alpha. <br /> 2860 - Install extender board for generator <br /> An extender board was installed on the generator to monitor generator functions by the airfield lighting control system in <br /> compliance with new FAA Airfield Lighting Control and Monitoring Systems per AC 150/5345-56. This additional <br /> equipment will receive and transmit signals that monitor significant attributes of the generator and, as appropriate, create <br /> alarms on the airport lighting control system (ALCS) monitor. <br /> 2870 - Radio controller modifications <br /> A radio controller will be installed that allows pilots to change the intensity of the runway edge lights from their aircraft <br /> an approach to both runways by keying their radio microphones. This is an enhancement to the existing pilot control <br /> system already installed on FAA navaids such as the MALSR and also allows the airport to save significant energy while <br /> improving safety by providing pilot control for edge light intensity when the air traffic control tower (ATCT) is closed at <br /> night. <br /> 2880 - Install cages around two ezterior conduits at the electrical building <br /> Cages will be installed around the exposed PVC pipe conduits on the north and south end of the electrical building <br /> lightening protection system to provide physical protection for the PVC conduit stubs. This conduit needed to be non- <br /> metallic to avoid choking the conductors in the lightning protection system. <br /> 2890 - Sill plates at doors in electrical building <br /> New sill plates will be installed at the two double doors at the south end of the electrical building. <br /> 2900 - Clean agent fire extinguishers in electrical building <br /> Replace three carbon dioxide fire extinguishers with clean agent fire extinguishers in the vault building that will provide <br /> better protection for electrical equipment. <br /> 3 <br /> <br />