Civil/Drainage Engineer — Below-Grade Residential Garage Ramp & Sump Design (Stamped Drawings, Texas

DRAFT plans: https://drive.google.com/file/d/16fJ9Lpr9zRCIQMHjA6MZ3wgaGKFMPsae/view?usp=drivesdk Scope: • Review existing architectural plans (currently shown as street-level garage) and redesign as a depressed/basement-level garage, targeting 6–8 ft below street grade based on available driveway length • Engineer the driveway ramp profile (slope + transition curves at top and bottom) to prevent vehicle undercarriage/bumper scraping, per standard parking ramp design practice • Design surface drainage to prevent stormwater intrusion into the garage: trench drain at the driveway/garage threshold, site grading, and tie-in to a sump system • Design a sump pump system (duplex pump recommended) to evacuate any water that reaches the trench drain/pit, including backflow prevention into the city storm system and power-outage contingency (battery backup or generator interlock) • Coordinate with geotechnical findings (groundwater depth, soil bearing) as needed for waterproofing recommendations • Available for follow-up questions during the city’s plan review process • Please share examples of similar below-grade garage or ramp drainage projects