Figure 2. Profile along the thalweg of the Colorado River from the delta at the northern end of Iceberg Canyon near the eastern end of Lake
Mead to the Hoover Dam. The profile shows the elevation (above sea level)
of the pre-impoundment surface (the original bed of the Colorado River)
and the elevation of the lake floor at the time of the survey in 2001.
Average slopes for each basin are shown above the lake floor.