WHAT'S HAPPENING NOW
—— ft above typical
Finding the top signal on the water…
Live river level, flow, historical records and forecast for Big Spring Run near Mylin Corners in PA, United States, built from official government gauge data.
Big Spring Run near Mylin Corners sits in the Lower Susquehanna watershed in Pennsylvania.
The pattern here is modest but still useful to watch. June is the highest typical month at 3.33 ft (1.02 m), while August is the lowest typical month at 3.16 ft (0.96 m). That 2.1 in (5.4 cm) annual swing is small, but it still matters at a low crossing, a pump intake, or a spot where you want to know whether a channel is holding steady from month to month.
In this part of Pennsylvania, winter and spring usually set up the larger rises, and late-summer floods can still arrive when tropical remnants pass through. For day-to-day use, though, the seasonal low is the more common watchpoint for shallow water.
The record high is 4.8 ft (1.46 m), reached in October 2013. The record low is 2.69 ft (0.82 m), reached in September 2012.
Those two marks show the spread this stream can cover at this station. If you keep equipment, access, or a dock set to the usual summer range, the record high is the level that tells you how far conditions can push above that. The lowest record is the one to remember when water is tight and margins are small.
There is no fastest 24-hour rise listed in the facts, so there is nothing specific to use there.
The hero number on this page is the current USGS reading at this station. It is more useful than raw elevation because the same number means something different in January than it does in August. The comparison against the median for this calendar day shows whether the stream is running high, low, or near its usual level for this date.
This station has 18 years on record, so that daily median has a solid local baseline. For anyone tracking access, pumping, or stream conditions, that context is the point of the page.
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.
Real-time water levels, forecasts, and alerts for lakes and rivers across Canada, the US and the UK. Built on official government data.
Nibi Metrics tracks more than 13,000 gauged lakes and rivers across Canada, the United States and the United Kingdom, reading directly from official federal monitoring networks: the Water Survey of Canada, the United States Geological Survey, Quebec's provincial hydrometric network, and the Environment Agency for England. Every number on the platform is measured, not modelled - taken from a government gauge on the water itself and compared against that location's own historical record for this exact date.
The level right now, in feet or metres, updated as the source agency publishes new readings - for many stations that is every five to fifteen minutes. How today compares to typical: every location carries its own typical-for-this-date band built from its historical record, so a reading is never just a number - it is above, below, or near what this water usually does on this calendar day. Which way it is moving: a measured RISING, FALLING, or STEADY verdict computed from the gauge's own recent readings, with the rate of change - the difference between a flood ending and one beginning. What comes next: level forecasts up to 72 hours ahead, driven by the gauge's recent behaviour, upstream water, and quantitative precipitation forecasts, alongside live radar, lightning, and weather for the surrounding region.
Set a threshold on any location - a level, a distance above typical, or a rate of climb - and Nibi emails or notifies you the moment the gauge crosses it. Cottagers use it for spring freshet, anglers for river conditions, marinas and municipalities for operations. The scanning runs around the clock against the same measured data shown on every page.
Nibi means water in Anishinaabemowin. The platform began at a family cottage on Lake Muskoka, Ontario, where the spring melt floods the shoreline most years and the only forecast was standing on the dock, looking, and guessing. It grew into an independent, member-funded platform run by Muskoka Research Inc. - no investors, no data resale, and a privacy policy shorter than most cookie banners. The core data is free for everyone, forever; paid plans add automation like multi-location alerts, deep history, and reports.
Nibi spans the continent: every Canadian province and territory with active federal gauges - from Vancouver Island rivers to the Muskoka lakes, prairie reservoirs, and Quebec's hydrometric network - and the United States from Maine to the Texas Hill Country, the Ohio Valley, and the Pacific Northwest. Coverage grows where the water news is: when a basin floods, its gauges join the platform with their full historical records attached. Many stations report every five to fifteen minutes; most report at least hourly; every page states exactly when its gauge last spoke.
The core promise is simple: the water data is free, for everyone, forever. Live levels, maps, radar, and recent history never sit behind a paywall. Paid plans fund the platform by adding automation - multi-location alerts, decades of history, longer forecasts, and PDF reports - so the people who need more carry the cost for everyone who just needs to check the lake before driving up. There are no investors and no advertising deals shaping what the data says.
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