07-09-18 Drainage and Flooding Committee Meeting

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IML Purpose and Need Civil PEs has been selected to perform professional services for the design of pavement and drainage improvements for La Porte Municipal Airport and the City of La Porte via a block grant administered by the Texas Department of Transportation — Aviation Division. The purpose of the project is to make improvements to the airport's assets to meet grant obligations in keeping the airport facilities in good condition for use by the flying public. This project will identify improvements for the pavement consisting of pavement surface treatment(s) to preserve the pavement condition and enhance safety. This project will also analyze and design improvements to the airfield drainage to promote drainage of the airfield and reduce the opportunity for stormwater to pond, creating both a structural issue with saturated pavement foundations and the attraction of wildlife to the airfield. The majority of the site drains to the Spencer Highway drainage system. For this reason, the Spencer Highway system was also evaluated for capacity. The recommendation for on -site improvements are derived to meet the local, state, and federal regulatory requirements, and are discussed in subsequent sections. 1.1. SCOPE The programmed scope of the project, as listed by Aviation Division in the most recent Capital Improvement Program as well as scope indicated in the request for proposals, consists of pavement improvements to rehabilitate and mark Apron 1, Apron 2, and Apron 3; rehabilitate and mark Runways 12/30 and 5/23, rehabilitate Taxiways A, B, the northwest hangar access taxiway at Runway 12; and rehabilitate Taxiways C and D. The project also generally includes a program line item for "Drainage Improvements". In that, this report identifies drainage problems on the airfield and develops solutions to correct the problems. 2. Criteria 2.1. GENERAL La Porte Municipal Airport is a reliever class general aviation airport. It forms a part of the Texas Airport System Plan (TASP) and the National Plan of Integrated Airport Systems (NPIAS) as a reliever airport. The airport has 2 runways with full parallel taxiways on each runway. There are 3 Fixed Base Operators (FBOs) on the airport along with self -serve fueling. The airport does not have a public terminal. The current layout of the airport is presented in Exhibit 1. 2.2. ALP INFORMATION AND TRAFFIC LEVELS The current Airport Layout Plan (ALP)', approved in January 1989, indicates that the airport is based on Aircraft Approach Category "B" (speeds of about 90 knots to 120 knots) ' Coffman and Associates, 1989. Page 13