Greenwater River river
River streamflow levels
Daily aggregate streamflow across every monitored gauge along the Greenwater River. Use the range buttons to zoom in on a specific period.
Total streamflow
Sum of all monitored streamgauges · daily
Every streamgauge along the Greenwater River
All 1 USGS gauges Snoflo tracks for this river, with current flow, stage, recent change, percent of normal, and the gauge's all-time min / max. Click any header to sort. Cells are heatmapped relative to the column min/max -- darker blue = higher.
| Streamgauge▾ | Streamflow (cfs)▾ | Gauge stage (ft)▾ | 24h Δ (%)▾ | % Normal▾ | Min (cfs)▾ | Max (cfs)▾ | Elevation (ft)▾ |
|---|---|---|---|---|---|---|---|
|
Greenwater River At Greenwater
WA
USGS 12097500
|
191 | 3.33 | -6.8 | 48% | 22 | 10,500 | 1,743 |
Streamflow elevation profile
Each bubble is one gauge along the river, plotted by current streamflow (x-axis) vs elevation (y-axis), sized by gauge stage. Reading top-to-bottom traces the river from headwaters down to its mouth -- you can see flow accumulate as elevation drops.
Elevation vs streamflow
One point per monitored gauge · bubble size = gauge stage
Greenwater River
The Greenwater River is a river located in western Washington state, USA. It stretches for 38 miles from its source on the western slopes of the Cascade Mountains to its confluence with the White River. The river is known for its clear green water from the glacial melt of Mount Rainier.
The river has a long history of providing water for irrigation and hydroelectric power generation. The White River Hydroelectric Project was constructed in the early 1900s, creating a series of reservoirs and dams along the Greenwater River. The largest reservoir, Howard Hanson Dam, is used for flood control, recreation, and fish habitat. Other smaller reservoirs, such as Mud Mountain Dam and Auburn Dam, provide irrigation water for farmland in the surrounding valley.
Recreational activities on the river include fishing, kayaking, and whitewater rafting. The river is also home to a variety of fish species, including chinook salmon and steelhead trout. The Greenwater River and its surrounding landscape are protected and managed by the National Park Service as part of the Mount Rainier National Park.
Recreation along the Greenwater River
Fishing access and paddle runs Snoflo tracks within the watershed.
Paddle runs
- Headwaters At American Lake To Confluence With Ranier Fork
- Mt. Baker-Snoqualmie Nf/Mt. Ranier Np Boundary At North Section Line Of Sec 3, T17 N, R10e To Confluence With Huckleberry Creek
- Confluence With Chinook Creek To Southern Boundary Of Mount Rainier National Park
- Confluence With Ranier Fork To Confluence With Bumping River
- Headwaters On The Southeast Flank Of Mount Rainier At An Elevation Of 5500 Ft To Confluence With Chinook Creek
- Headwaters In The Mystic Lake Basin On The North Side Of Mount Rainier To Northern Boundary Of Mount Rainier National Park
Track the Greenwater River in the Snoflo app
Set per-gauge push alerts (e.g. "alert me when flow at the Russian R Nr Healdsburg crosses 5,000 cfs"), and Snoflo's iOS app pushes the moment USGS reports the crossing.
About the Greenwater River
Where does the data for the Greenwater River come from?
Streamflow and gauge stage data are sourced from the U.S. Geological Survey (USGS) National Water Information System. The aggregate flow shown at the top of the page is computed by Snoflo as the sum of all monitored gauges along the river.
How is "percent of normal" calculated?
Today's aggregate streamflow is compared to the historical average aggregate streamflow on this calendar day across the river's full record. 100% means right on average; values above 100% indicate above-normal flow (wet year); values below indicate below-normal (dry year or drought).
Why are some gauges showing very different flows?
Gauges along a river measure flow at different points: headwater gauges read what's coming off the snowpack or mountain runoff; downstream gauges integrate everything upstream, including tributary inputs. Wide spreads usually mean a tributary is contributing significantly between gauges.
What's the elevation profile chart showing?
Each bubble is one gauge along the river, plotted by streamflow (x-axis) and elevation (y-axis), sized by gauge stage. Reading top-down traces the river from headwaters to mouth -- you can see flow build as elevation drops.
Can I get alerts when a specific gauge crosses a threshold?
Yes -- alerts are managed in the Snoflo iOS app on a per-gauge basis. Open any individual streamgauge from the table above and favorite it to set a discharge threshold.