Water Levels of the Great Salt Lake, USA41.0N 112.4W
The Great Salt Lake is located on a shallow playa. Consequently, small changes in the water-surface elevation result in large changes in the surface area of the lake. This is particularly evident when the lake spills into the west desert at an elevation of about 4215 feet, greatly increasing its area.
The lake differs in elevation between the south and north parts. The Union Pacific Railroad causeway divides the lake into two parts. The water-surface elevation of the south part of the lake is usually 0.5 to 2 feet higher than that of the north part because most of the inflow to the lake is to the south part. The causeway, which hinders mixing, also explains why the northern half of the lake appears to be a different color than the southern half.