River Report

Kaskaskia River river

8 streamgauges 91% of normal Last updated 2026-05-30
Aggregate flow
17,265cfs
% of normal
91%
Daily volume
34,245AF
Seasonal avg
18,895cfs

Total streamflow across the Kaskaskia River was last observed at 17,265 cfs, and is expected to yield approximately 34,245 acre-ft of water today; about 91% of normal. Average streamflow for this time of year is 18,895 cfs, with recent peaks last observed on 2015-12-30 when daily discharge volume was observed at 129,500 cfs.

Maximum discharge along the river is currently at the Kaskaskia River At New Athens reporting a streamflow rate of 5,390 cfs. This is also the highest stage along the Kaskaskia River, with a gauge stage of 69.61 ft at this location. This river is monitored from 8 different streamgauging stations along the Kaskaskia River, the highest being situated at an altitude of 650 ft, the Kaskaskia River At Chesterville.

Max discharge

Kaskaskia River At New Athens

5,390cfs
Highest stage

Kaskaskia River At New Athens

69.61ft
Highest-elevation gauge

Kaskaskia River At Chesterville

650ft
Aggregate trend

River streamflow levels

Daily aggregate streamflow across every monitored gauge along the Kaskaskia River. Use the range buttons to zoom in on a specific period.

Total streamflow

Sum of all monitored streamgauges · daily

Per-gauge breakdown

Every streamgauge along the Kaskaskia River

All 8 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)
Kaskaskia River At Chesterville IL
USGS 05590950
436 34.15 -9.4 105% 0 10,800 650
Kaskaskia River At Cooks Mills IL
USGS 05591200
237 3.78 -9.1 82% 1 11,600 641
Kaskaskia River At Shelbyville IL
USGS 05592000
928 9.19 -24.3 112% 7 4,590 568
Kaskaskia River Near Cowden IL
USGS 05592100
1,140 6.81 -53.1 138% 12 19,500 553
Kaskaskia River At Vandalia IL
USGS 05592500
1,750 8.83 -45.1 140% 20 32,200 537
Kaskaskia River At Carlyle IL
USGS 05593000
3,360 14.74 -5.6 142% 16 10,600 413
Kaskaskia River At New Athens IL
USGS 05595000
5,390 69.61 1.1 166% 50 45,700 403
Kaskaskia River Near Venedy Station IL
USGS 05594100
4,460 11.95 -9.1 135% 71 56,200 395
Annual peaks

Maximum streamflow discharge by year

The single highest aggregate discharge recorded each year. Spotting the multi-year trend reveals droughts vs. wet cycles long before the headline daily flow does.

Annual peak discharge

From the river's full record · one point per water year

Profile

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

About this river

Kaskaskia River

The Kaskaskia River flows for a length of 325 miles through central and southern Illinois before joining the Mississippi River. The river is known for its role in early French exploration and settlement in the area. It has a drainage area of 5,746 square miles and is heavily utilized for agricultural purposes. The Kaskaskia River is also home to several reservoirs and dams, including Carlyle Lake, which is the largest man-made lake in Illinois with a surface area of 26,000 acres. The lake is utilized for recreational activities such as boating, fishing, and camping. The river also provides water for municipal, industrial, and agricultural use. The Kaskaskia River has played a significant role in the history and development of Illinois and remains an important natural resource for the state.

Track the Kaskaskia 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.

FAQ

About the Kaskaskia River

Where does the data for the Kaskaskia 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.