07-09-18 Drainage and Flooding Committee Meeting

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IML pavement edge and re -grading the innermost 10 feet off the runway edge to the alignment of the runway edge lights. The intent is to re-establish the standard15 of a 1-1/2 inch drop-off from the pavement edge. The re -graded strip is sodded to a width of 3 feet off the pavement with the remaining graded area re -seeded. Taxiway A Taxiway A rehabilitation is split into two components. The west end of the taxiway, but not including the portion from the end connection to connector Taxiway Al, is in need of reconstruction. This can be accomplished (if the intent is not to move the taxiway to the current standard offset) by recycling the existing pavement in -place as a foundation for a new asphalt pavement. After proper curing of the asphalt, the surface would be seal coated. This is done to preserve the pavement surface from the beginning, but also to maintain a color consistency. The surrounding seal -coated pavements will maintain a dark color long after any new asphalt pavement has oxidized and turned light gray, so seal coating the new pavement helps maintain a consistent color overall for the airfield pavement. To the east of Runway 5/23 (and the far west portion of the taxiway), the pavement is in good condition and set to receive patches, crack seal, and a seal coat as described above in the Runway 12/30 rehabilitation. After curing of the seal coat, the pavement will receive a new taxiway centerline striping. It was recognized that all across the airport, the radii of the taxiway centerlines in the intersections varied. The intent of the rehabilitation is to consistently stripe taxiway radii. Therefore, the intent on taxiway centerline radii is to use a 60 foot radius for runway lead-offs and entrances, and a 25 foot radius for all other intersections and curves. This radius meets the current standard16 for a TDG 1A classification. For the taxiway portion that is not reconstructed, edge grading to remove the vegetative buildup at the pavement limit is also included into the rehabilitation, along with the sodding and seeding of the graded area as described in the Runway 12/30 rehabilitation. Taxiway D The pavement within Taxiway D is generally in good condition. As noted in the other pavements for rehabilitation, Taxiway D is selected to receive a seal coat (there were no significant block cracks to seal) and edge grading. The limits of the rehabilitation are at the tenant apron edge. All along the edges of the taxiway, edge grading to remove the vegetative buildup at the pavement limit is also included into the rehabilitation, along with the sodding and seeding of the graded area as described in the Runway 12/30 rehabilitation. 15 FAA AC 150/5300-13A, Airport Design — Change 1, Figure 4-33, 2/26/2014. 16 ibid, Table 4-3. Page 123