San Antonio Airport Master Drainage Plan

San Antonio, Texas
Client: City of San Antonio

Maestas was a subconsultant for the drainage component of this project. The Master Plan was composed of three parts: The Comprehensive Plan, the Sustainability Plan, and the Multimodal Transportation Plan. These three plans provided guidance on how the City of San Antonio should develop the San Antonio International Airport over the next 25 years. As part of the drainage components for the Master Plan, Maestas was responsible for the drainage analysis of Salado Creek, which flows within the northern portion of the airport property, and the storm sewer systems within the airside and landside portions of the airport. The drainage analysis for Salado Creek involved the development of the corrected effective hydraulic model using HEC-RAS, which validated the current 100-year FEMA floodplain. The corrected effective incorporated the available 2017 LiDAR data, Wurzbach Parkway, and survey data of the various creek culvert/bridge crossings. Furthermore, Maestas developed a conceptual plan to realign Salado Creek to verify the feasibility from a hydraulics standpoint if additional runways could be incorporated. The drainage analysis for the airside and landside storm sewer systems involved creating a 2-dimensional model using XPSWMM to simulate the flow of water between the surface and subsurface features. This analysis was identified any deficiencies within the storm sewer system, and ponding limits within the surface.