Res 1994-138 - Laserfiche WebLink

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/Ooc., SAN MARCOS MUNICIPAL AIRPORT CITY OF SAN MARCOS, TEXAS FY 1995 AIRPORT IMPROVEMENT PROGRAM PRE-APPLICATION FOR FEDERAL ASSISTANCE PROGRAM NARRATIVE 1. INTRODUCTION The City of San Marcos has been involved in progressive and extensive efforts to rehabilitate and improve the San Marcos Municipal Airport since 1988. Projects have included the reconstruction of Runway 12-30 and Runway 8-26 and the installation of MALSR on Runway 12-30. The City submitted a preapplication in October 1990 which included four basic items of work: (1) rehabilitation of the entire aircraft parking apron; (2) reconstruction of Taxiway "F"; (3) new medium' intensity taxiway lighting system, and; (4) installation of an emergency electrical generator. No pavement evaluation or geotechnical analyses were performed to establish the specific design for the various pavement improvements. Subsequent to submittal of the preapplication, the City of San Marcos retained Carter & Burgess, Inc. to prepare the plans and specifications for the FY 1992 project. 2. FY 1992 IMPROVEMENTS . The FY 1992 improvements included the approximate middle one-third of the aircraft parking apron, reconstruction of Taxiway "F", drainage improvements to Runway 12-30, and rehabilitation of the airport access road from the terminal building to the east end of the apron. Carter & Burgess, Inc. and Raba-Kistner-Brytest, Inc. conducted a condition survey of the apron to verify that the concrete pavement could be rehabilitated rather than asphalt overlaid as originally envisioned. This approach was taken at the request of the City of San Marcos with the approval of FAA. The results of the investigation and testing work indicated that many slabs were in complete failure while a large majority could be salvaged through various repair techniques other than HMAC overlay. Construction documents were prepared accordingly for the apron, Taxiway "F" and access road. Drainage improvements to Runway 12-30 were' necessitated by the extreme rainfall events in December 1991 and January 1992 which caused water to percolate up through the pavement. Improvements to the access road were added to the program due to the occurrence of several pavement failures and periodic traffic problems because the existing road was only ten feet wide. Because of the need to comply with statutory deadlines, this project was bid at the same time as the largest TxDOT highway letting of the year was in process which limited the response to this project. Upon receipt of bids, it was apparent that the FY 1992 funding would not cover all of the items originally programmed for that year. The project was scaled back to match the available funds causing the access road improvements to be delayed until FY 1993. 3. FY 1993 IMPROVEMENTS The FY 1993 improvements included a continuation of the apron rehabilitation program (approximately 15 acres) and clearing of obstructions from the Runway 12-30 drainage outfall channel that may have contributed to a back-up of storm water causing the water to sit on the airfield and percolate up through the pavement. ¡ ¡ ¡ I