Calf Run at Marshallton, de Water Level
Live river level, flow, historical records and forecast for Calf Run at Marshallton, de in DE, United States, built from official government gauge data.
- Location DE, United States
- Watershed brandywine christina
- Primary gauge 01480017 (USGS)
About Calf Run at Marshallton, de
Calf Run in the Brandywine-Christina watershed, Delaware, is a USGS river gauge.
Season by season
December is the highest typical month here, at 16.38 ft (4.99 m), while September is the lowest typical month, at 16.19 ft (4.94 m). That is a small seasonal range of 2.2 in (5.7 cm), so day-to-day changes matter more than the broad annual pattern for anyone checking a crossing, bank line, or intake.
On this kind of coastal-plain stream, winter and spring are the stretch to watch for higher water, while late summer and early autumn are usually lower. The pattern here is modest, but it is still enough to shift shallow edges and change where a fish holds.
Records and rises
The record high is 17.25 ft (5.26 m) in September 2018. The record low is 16 ft (4.88 m) in August 2021.
Those two endpoints show the spread this gauge has seen in 11 years of record. There is no fastest 24-hour rise listed in the facts, so the safe reading is simply that short-term rise is not quantified here. For local use, that means the record gives you the outer bounds, while the daily trace tells you how quickly the water is moving toward them.
Reading the hero number
The number on the page is best read as today’s level against the median for this calendar day, not as a raw elevation by itself. That comparison tells you whether the river is running above or below its usual position for this date, which is more useful for access, fish habitat, and nuisance-water checks than a single height on the staff.
This station is operated by the USGS, and it has more than 11 years of record.
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
Nibi Metrics - live water levels, flow, and forecasts for lakes and rivers across Canada, the US and the UK
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.
What you can see for any monitored lake or river
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.
Alerts that watch the water for you
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.
Where Nibi comes from
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.
Coverage
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.
Free forever, funded by members
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.
Water Stories
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How every number is computed - About the platform
