River Levels Streamgages Weather

Total streamflow across the North Santiam River was last observed at 1,270 cfs, and is expected to yield approximately 2,519 acre-ft of water today; about 53% of normal. River levels are low and may signify a drought. Average streamflow for this time of year is 2,397 cfs, with recent peaks last observed on 2022-05-08 when daily discharge volume was observed at 50,900 cfs.

Maximum discharge along the river is currently at the North Santiam River At Niagara reporting a streamflow rate of 1,270 cfs. However, the streamgauge with the highest stage along the river is the North Santiam River Near Jefferson with a gauge stage of 14.38 ft. This river is monitored from 3 different streamgauging stations along the North Santiam River, the highest being situated at an altitude of 1,103 ft, the North Santiam River At Niagara.

The North Santiam River is a 92-mile river located in western Oregon, United States. The river was originally used by Native Americans for fishing and trading purposes. The river flows through the Cascade Range and is fed by numerous tributaries. The river has two major reservoirs, Detroit Lake and Big Cliff Reservoir, both of which were built in the mid-20th century for hydroelectric power generation and flood control. The North Santiam River is also used for recreational activities such as fishing, kayaking, and swimming. The river is home to a variety of fish species, including Chinook salmon, steelhead trout, and rainbow trout. The surrounding agricultural land is irrigated with water from the river, making it an important resource for the local farming communities.

July 20, 2024







Last Updated 2024-07-20
Discharge Volume 2,519 ACRE-FT
Streamflow 1,270.0 cfs
+180.0 cfs (+16.51%)
Percent of Normal 52.98%
Maximum 50,900.0 cfs
Seasonal Avg 2,397 cfs
Streamgauge Streamflow Gauge Stage 24hr Change (%) % Normal Minimum (cfs) Maximum (cfs) Air Temp Elevation
North Santiam River At Niagara
USGS 14181500
1270 cfs 3.11 ft 16.51
North Santiam River At Mehama
USGS 14183000
1270 cfs 3.35 ft 17.59
North Santiam River Near Jefferson
USGS 14184100
1010 cfs 14.38 ft 11.36

Regional Streamflow


Cubic Feet Per Second


Cubic Feet Per Second


Cubic Feet Per Second


Cubic Feet Per Second

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Historical River Levels

The North Santiam River is a 92-mile (148 km) tributary of the Santiam River in western Oregon in the United States. It drains 766 square miles (1,980 km2) of the Cascade Range on the eastern side of the Willamette Valley east of Salem.It rises in the high Cascades in eastern Linn county, northwest of Three Fingered Jack in the Willamette National Forest. It flows north through the mountains past Marion Forks, receiving the drainage from the western slope of Mount Jefferson. Near Mount Jefferson it turns sharply west, descending through a canyon past Idanha and Detroit to Niagara County Park where the valley begins to widen and some agriculture use begins. Continuing west, the river flows past Gates, Mill City and Mehama. It emerges through the foothills into the Willamette Valley near Stayton, then flows 15 miles (24 km) southwest through the valley where it joins the South Santiam River to form the Santiam River. The confluence is approximately 10 miles (16 km) east of the confluence of the Santiam and the Willamette River.
It is impounded by Detroit Dam in the mountains west of Detroit to form Detroit Lake for flood control. Detroit Lake State Park is along the northern shore of the lake.
In the 19th century, the canyon of the North Santiam River provided a formidable obstacle to settlers. The construction of a railroad in 1887 opened up the canyon to settlement and logging of the surrounding mountains.

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