07-09-18 Drainage and Flooding Committee Meeting

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IML Northwest HanparAccess Taxiway at RW 12 For the pavement and hangar apron in this area, the rehabilitation consists of crack sealing mostly old asphalt paving joints and seal coating the pavement in a P-631 surface treatment. There does not appear to be justification to use a fuel -resistant thermoplastic seal coat. The damaged pavement adjacent to the fin drain is to be repaired before the seal coat and crack seal to provide the best overall finish, and the seal coat is NOT to cover the concrete of the fin drains. The striping will consist of taxiway centerline. Providing taxiway centerlines between the hangars cannot be made due to the lack of clearance between the T-hangars. The outer edges of the apron and along the taxiways is to have edge grading to remove the vegetation build-up. The rehabilitation also includes sodding and seeding the disturbed area. Runway 5123 As with the primary runway, the pavement surface within the limits of Runway 5/23 and the connecting taxiways to the holdlines is good. Even though the runway is shorter, there is slightly more total alligator -type cracking. As with the primary runway, the pavement is determined to need some patch repairs over the alligator - type crack areas and crack sealing of those block cracks identified. After proper curing of the patches, the entire length and width of the runway is to receive a seal coat in accordance with the specifications for item P-631. For the striping, the existing pavement markings on the runway must be removed — to allow for best adhesion of the seal coat to the pavement. After the installation of the seal coat and curing time, the markings will be replaced. As in the other pavement rehabilitations, both edges are to be graded to remove the vegetative build-up and promote flow of runoff from the edge of the runway pavement. The first 3 feet off the edge of the pavement will be sodded, with the remaining disturbed area being reseeded. Taxiway 8 Taxiway B is in good shape, but has many areas of alligator -type cracking that will be patched. The block cracks within the taxiway will be sealed and after proper curing of the patches, the entire taxiway is to receive a seal coat in accordance with the specifications for item P-631. Taxiway C The pavement within Taxiway C is generally in good condition and is selected to receive a seal coat (the vast majority of block cracks have been previously sealed) and edge grading. The limits of the rehabilitation are along the alignment of the taxiway. 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. Page 124