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6of7 AIRPORT Eu ene Ai ort -Parallel DATE . 5/30/06 Runwa Pro'ect LOCATION Eugene, Oregon AIP PROJECT NO. 3-41-0018-35 Job No. 4183 CONTRACTOR Wildish Construction Co. Chan a Order 16 2920 - Raise electrical vaults The two electrical vaults at the Hollis Lane crossing north of Taxiway Charlie were installed to match existing grades during the Phase I construction. After the ditches were filled on Hollis for safety reasons, these two vaults needed to be raised to match the revised grades. The existing buried vault on Taxiway Delta was discovered during recircuiting activities for the new SMGCS in this area. This vault needs to be accessible to airport operations, so it was raised to match existing grades. 2930 -Add sign switches Installing external switches on each new sign allows airport operations to locally turn off the power to each sign so that sign maintenance can be completed without having to turn off the complete sign circuit. This item was not included in the original project documents. 2940 - Regrade service roads in safety area The service roads that were constructed in the safety area need to have the shoulder filled and graded to meet the acceptable slopes in the safety areas. The roads were added on top of the original grade of the safety area and had up to 18- inches of depth that needed to be graded out to acceptable slopes. This work was not included in the original plans. 2950 -Additional grading around inlets on abandoned Rwy 3/21 In change order 13, the existing 15-inch thick layer of gravel base was excavated from the abandoned Runway 3 west of Runway 16R/34L to facilitate farming this area in the future. This work was left but of the original project and only specified that the asphalt was to be removed. To save costs associated with replacing this material, importing additional dill material, and putting the area back to the original grades, it was decided to flatten out the crown of the existing runway. This change order item was to take advantage of extra suitable fill material the contractor had on the site. The wntractor placed the extra material at his costs and the airport agreed to pay for the additional final grading'of this material to improve the drainage in this area. 2960 - Over~zcavation on Try M Unsuitable sub-grade was discovered during consh action of Taxiway M that had to be removed and replaced with baz-run rock in order to achieve the required compaction of the sub-base. This work was similar to the other over-excavation that had to be done under extra work on Taxiway C and other portions of Taxiway M. The project schedule could not wait to dry and work the wet soft clayey material. 2970 -Grade around basins at EGAR During construction of the two drainage basins north of EGAR, it was determined that the location and design of the inlets should be changed to improve the function and future maintenance. The original design had side inlets with steep slopes and after further investigation it was found that the inlets could be relocated to the center of the basins and that it would work must better. This grading was necessary to implement the change. 2980 -Paint additional Xs on the ends of Tzy B and Rwy 16L/34R The surface of the cement treated base on Taxiway B and Runway 16L/34R was tacked and aerial pictures revealed that a pilot could mistake the new cement treated base as usable pavements. These Xs were painted as an extra security measure to prevent pilots from landing on these facilities until they were completed and opened on September 1, 2005. 2990 -Install drain around fueling tank facility When the groundwater level in this area rises above the ground surface during the winter, it is possible for water to enter the transition sump, which is designed to collect secondary diesel oil spills. This drain was determined to be the least cost 6