Great Salt Lake Information System

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Map of the Great Salt Lake Basin
6,413 km2 / 2,476 mi2

Minimum:  1,280 m / 4,198 ft
Maximum:  3,646 m / 11,961 ft
Range:  2,366 m / 7,763 ft

Minimum:  279 mm / 11 in
Maximum:  1,854 mm / 73 in
Average:  660 mm / 26 in

Weber River Watershed

The Weber River begins in Summit County, Utah, near Reids Peak (11,708 ft), flows west to Oakley, Utah, and then turns and flows in a northwesterly direction to the Great Salt Lake. The Weber River is approximately 125 miles long, one half of which lies in Summit County, 25 miles in Morgan County, and 30 miles in Weber County. The Ogden River, which is a major tributary to the Weber River, lies within Weber County and enters the Weber River about 12 miles upstream from its mouth. It drains Ogden Valley and the eastern portion of Weber County. This area was once an arm of ancient Lake Bonneville, and is now made up of three branches that transverse Ogden Valley and meet at the head of narrow Ogden Canyon. Other major tributaries to the Weber River include East Canyon Creek, Lost Creek, Chalk Creek, and Beaver Creek.

The Weber River Basin is a flat, fertile plain, which was formed by alluvial deposits from Lake Bonneville. The Weber River delta lies at the mouth of Weber Canyon. The Wasatch Mountains stretch north and south within the basin and separate the valley floors from the rolling hills. The headwaters of the Weber River begin at the northwestern edge of the Uinta Mountains. Within the Weber River drainage, the elevation varies from 4,200 feet at the Great Salt Lake, to nearly 12,000 feet high in the Uinta Mountains. The mean elevation for this area is approximately 6,700 feet. Approximately fifty percent of the area within the watershed ranges from 5,900 feet to 7,400 feet; and only 16 percent of the total area is less than 5,000 feet.

The Weber River watershed encompasses nearly 2,500 square miles and includes approximately 968 miles of perennial streams and 1,254 miles of intermittent streams. The flows of the Weber River and its tributaries are highly regulated by seven major reservoirs that also have a large effect on water quality. Echo and Rockport reservoirs are located on the mainstem of the Weber River, while Pineview, Causey, East Canyon, Lost Creek, and Smith and Morehouse Reservoirs are located on tributaries. Near Ogden, Utah, water from the Weber River is diverted at the Slaterville Diversion into Willard Bay Reservoir, the last major reservoir in the Weber River Basin. Water from Willard Reservoir, which is located on the shores of the Great Salt Lake, is used for irrigation in the Lower Weber River basin. This large reservoir, commonly known as Willard Bay, is also heavily used for fishing and boating.

The mean annual water yield for the Weber River Basin is approximately 7 inches (about 908,900 acre-feet), while the mean annual precipitation is approximately 23 inches (~ 3 million acre-feet). It is estimated that about 70 percent of the total precipitation within the watershed on average is consumed without producing measurable runoff. The mean annual runoff for the Weber River (near Plain City) is 352,000 acre-feet.

Source:  Utah Water Atlas

L A N D   C O V E R K M 2 P E R C E N T
Urban 221 3
Forest 2,027 32
Rangeland 3,378 53
Agriculture 466 7
Other 320 5
TOTAL 6,413 100

L A N D   O W N E R S H I P K M 2 P E R C E N T
Bureau of Land Management 8 <1
Forest Service 802 13
State 396 6
Private 5,066 79
Other 141 2
TOTAL 6,413 100