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Nibi Metrics

Real-time water levels, forecasts, and alerts for lakes and rivers across Canada and the US. Built on official government data.

Nibi Metrics turns raw gauge readings from official hydrometric networks into something a person standing on a dock can actually use: is the water high or low for today, which way is it moving, and how unusual is this? This page explains where every number on the platform comes from and what we do to it along the way.

Water Stories

The flood of record that was overtaken

For five years, spring 2019 was the mark every Lake Muskoka decision answered to. In April 2026 the lake went two centimeters higher - and the official books have not caught up yet.

Why the Assiniboine floods every spring

Inside the freshet cycle that puts Manitoba shorelines at risk each year - and why 2026 broke the script.

How snowpack becomes summer water

The science of snow water equivalent and why it drives the season ahead.

Reading a staff gauge like a hydrologist

What the numbers on the measuring stick actually tell you.

Flash Flood Alley: how Texas rivers rise in hours

Why Central and South Texas rivers go from gravel beds to fifty-year records in an afternoon - including July 2026 on the Nueces.

What a "100-year flood" actually means

One percent, every year, forever - unwrapping hydrology's most misunderstood phrase, and how it differs from our own percentiles.

Atigun R below Galbraith Lake near Pump Station 4 AK Water Level

Live river level, flow, historical records and forecast for Atigun R below Galbraith Lake near Pump Station 4 AK in AK, United States, built from official government gauge data.

About Atigun R below Galbraith Lake near Pump Station 4 AK

Atigun River - a vital waterway of the Sagavanirktok River system.

The Atigun River below Galbraith Lake plays an essential role within Alaska's Sagavanirktok River watershed. This river contributes to the broader hydrological dynamics of the region, with its flow influenced by seasonal patterns of snowmelt and ice formation characteristic of subarctic environments. Such dynamics draw attention to how the Atigun and its peers, like the Sagavanirktok River near Pump Station 3, function as lifelines for the ecosystem and human activities in this remote area.

The watershed context

Draining a catchment of approximately 297 square miles, the Atigun River channels water from the melting snows and seasonal rains, particularly active during spring when flooding can occur due to snowmelt and potential ice jams. The influence of glacier-fed rivers brings added complexity, as these flows often peak later in the summer months. Throughout the deep winter, water flow diminishes beneath ice, influencing aquatic habitats and species adapted to these harsh conditions.

Why the data matters here

Monitoring the Atigun River is critical for a variety of stakeholders, including wildlife management, construction planning, and local communities relying on the river's resources. Today's reading reflects the river's conditions, and comparing it against the historical median for this calendar day enables a better understanding of its current flow state. The U.S. Geological Survey (USGS) operates this station, providing vital data for effective flood management and environmental stewardship.

How this page is built

Readings come from official government gauges and are rolled into daily records: the daily mean, high and low for every day on record. Each calendar day gets its own baseline from the full history, so the level you see is compared against what this specific date usually looks like rather than an annual average.

How Nibi Metrics works · Water stories