USGS stream gauge 04127885 · Michigan

St. Marys River at Sault Ste. Marie, Ontario, MI

As of Oct 28, 2026, 5:12 AM EDT, this gauge read a gage height of 579.42 ft and a flow of 74,000 cfs. Over the past 7 days the water level fell 0.08 ft. Data from the USGS.

Updated Oct 28, 2026, 5:26 AM EDT (USGS Water Data snapshot)

Gage height

579.42 ft

7-day range 578.88–579.65 ft

Discharge

74,000cfs

7-day range 51,500–88,400 cfs

Latest reading

15 min ago

Oct 28, 2026, 5:12 AM EDT

Readings are provisional USGS data and may be revised. Rivers can rise fast after rain upstream. For flood warnings, check weather.gov and follow local authorities.

Gage height, past 7 days

579579579579580Oct 21Oct 22Oct 23Oct 24Oct 25Oct 26Oct 27
Gage height (ft), hourly, past 7 days. Low 579 · High 580.

Discharge, past 7 days

48,54859,24969,95080,65191,352Oct 21Oct 22Oct 23Oct 24Oct 25Oct 26Oct 27
Discharge (cfs), hourly, past 7 days. Low 51,500 · High 88,400.

Chart dates are in Michigan local time (America/Detroit).

Reading this gauge

Gage height is the water surface level above this station's own reference point, so 579.42 ft is not the river depth and cannot be compared with other gauges. Discharge, the volume of water flowing past each second, is the better number for comparing conditions over time and between rivers.

Station details
USGS site number04127885
Official nameST. MARYS RIVER AT SAULT STE. MARIE, ONTARIO
StateMichigan
Drainage area80,900 sq mi
Gage datum elevation578.0 ft above sea level
Coordinates46.4983° N, 84.3153° W

Source: USGS Water Data for the Nation, site 04127885. Parameters 00065 (gage height) and 00060 (discharge).

USGS station page View on OpenStreetMap Michigan earthquakes

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