Surface Water

Stream stage is an important concept when analyzing how much water is moving in a stream at any given moment. Stage is the water level above some arbitrary point in the river and is commonly measured in feet.
“Reach” can have slightly different meanings, depending on how it is used.
The largest U.S. lake west of the Mississippi River is Utah’s Great Salt Lake. The lake is about 75 miles long, and 28 miles wide, covers 1,700 square miles, but has a maximum depth of only about 35 feet.