What is the approximate elevation value of the colorado river as displayed in the grand canyon placemark?

According to bobpixels.com:

"levation of the Colorado River, at the bottom of the Canyon, averages out to around 2,200 feet (670 meters). The average elevation of the south rim is around 6,800 feet (2,072 meters) with the highest spot, Grandview Point, being 7,400 feet (2,255 meters). The average elevation of the north rim is about 8,000 feet (2,438 meters) with the highest point, Point Imperial, being 8,800 feet (2,682 meters). The depth of the Canyon at the South Rim, near Grand Canyon Village, measures almost a vertical mile, about 5,000 feet (1,524 meters)."

I  cant see the question.