freeboard Maven May 5, 2020 22 « Back to Glossary IndexFreeboard is the term for the height of the physical top of a levee or floodwall above the median design water surface elevation. Related Articles: NOTEBOOK FEATURE: Fixing California Aqueduct subsidence: A multi-billion dollar problemUSBR: Fortifying B.F. Sisk Dam and San Luis Reservoir against the power of an earthquakeMETROPOLITAN WATER DISTRICT: Subsidence of the California Aqueduct in the San Joaquin ValleyBAY DELTA SCIENCE CONFERENCE: Restoration in the Cache Slough Complex: The Yolo Flyway Farms Restoration ProjectUSGS: Land Subsidence Along the California Aqueduct in West-Central San Joaquin Valley, California, 2003–10« Back to Glossary Index