Sources & model notes
Elevations: U.S. Bureau of Reclamation, end-of-month records at Hoover Dam, Feb 1935 – Jun 2026 (1,097 measurements). History & dam dimensions: USBR, National Park Service, FHWA. Terrain: Natural Earth shoreline and Mapzen Terrain Tiles via the AWS Open Data registry. Bathymetry: modeled from the USBR riverbed profile; not survey soundings. Horizontal and vertical dimensions are both shown at true scale (no exaggeration). Place photos: National Park Service, NASA Earth Observatory, and Wikimedia Commons contributors — public-domain and Creative Commons material, credited on each image.