07-09-18 Drainage and Flooding Committee Meeting

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IML Another possible alternate is to include the apron surface spray treatment. It may be possible that if good pricing is provided during bid, that room in the funding may allow for the seal coat. A final possible alternate could be to provide additional work in the linear detention areas. Such additional work will provide more detention and ultimately get the airport closer to the "goal" of the drainage improvements that are identified as needed in this report. 7. Schedule Based on the scale of the project, with the expectation that phasing will limit the closure of both runways at the same time, along with other limitations on phasing of the apron rehabilitation due to need for parking of aircraft, it is expected that the schedule of the project will be slightly longer than normal due to phasing and re -mobilization for certain construction activities (like pavement milling for patching). Given this, the expected timeframe for construction schedule is likely to be between 10 months and 1-year overall duration. The expectation is that the project will not bid until funding is provided for FY 2019 construction, which is usually in the spring. Therefore, the project schedule will likely follow a July 2019 to May 2020 timeframe. If the possibility of moving the project into FY18 becomes a reality, the timeframe would move up 1 year to 2018-2019. Accommodations to accelerate the construction schedule can be made, but the pricing provided in the estimate is based on a standard construction schedule so some additional cost for acceleration would need to be accommodated for if a quicker schedule is desired. 8. Cost Estimates The cost of the project as recommended is listed below: TABLE 6 — PROJECT ESTIMATE OF PROBABLE CONSTRUCTION COST The pavement is patched, crack sealed, and surface treated. Edges are regraded. Taxiway markings are replaced. The pavement is surface treated. Edges are regraded. Taxiway markings are replaced. Page 134