Casselman River at Grantsville water level

Name: Casselman River at Grantsville water level (U.S. Geological Survey)
Creator: U.S. Geological Survey
License: https://www.usgs.gov/information-policies-and-instructions/copyrights-and-credits

River gauge, Casselman River, Maryland, United States

Directions

Below flood stage

Water level

1.30ft Down 0.04 ft over the last 24 hours

Measured Oct 19, 2026, 07:45 PM EDT (32 min ago)

Flow: 70.2 cfs

History

7 days

Water level Minor flood stage

What this means

The Casselman River at Grantsville is at 1.30 ft, in the normal range.

It is 3.20 ft below the flood stage of 4.50 ft.

It has dropped 0.04 ft over the past 24 hours. In the last month it has stayed between 1.30 ft and 1.48 ft.

Fall is often low-water season on rivers, until steadier rain returns.

Judged against the official flood stage for this gauge. How to read levels

Key numbers

Highest on record: 10.70 ftOctober 15, 1954

Floating and fishing near Casselman River at Grantsville

Normal flows mean predictable rapids and good access at most put-ins.

Flood stage here is 4.50 ft, 3.20 ft above the current reading. Beyond it, the National Weather Service also defines moderate and major flood stages.

What happens at each level

6.00 ft: Flooding of structures begins along the Casselman River near Maple Grove Road.
5.00 ft: Maple Grove Road along with parts of Bittinger Road are likely covered with more than a foot of water at this level.
4.50 ft: Maple Grove Road near the Casselman river is likely covered with around a half foot of flowing water. Parts of Bittinger Road are likely closed at this level.
4.00 ft: Water starts to flow over Maple Grove Road near Casselman River. Water also starts to cover parts of Bittinger Road.
3.50 ft: Water from the Casselman River is likely covering low lying fields around the river.
1.30 ft: Right now

Impact statements from the U.S. National Weather Service.

Highest crests on record

Rank	Level	Date
1	10.70 ft	October 15, 1954
2	9.15 ft	January 19, 1996
3	8.13 ft	July 4, 1948
4	7.29 ft	September 1, 2021
5	7.10 ft	September 9, 2018
6	7.04 ft	November 5, 1985

Weather at the gauge

Rain in the last 3 days: 0.16 in. Rain that falls upstream can take hours or days to show up at a river gauge.

18 Sun 53° 33° – Wind 5 mph

19 Mon 58° 38° – Wind 6 mph

20 Tue 62° 40° – Wind 9 mph

21 Wed 62° 39° – Wind 6 mph

22 Thu 60° 37° – Wind 9 mph

23 Fri 60° 40° – Wind 6 mph

24 Sat 56° 36° – Wind 10 mph

Forecast: Open-Meteo

Sunrise 07:32 AM Sunset 06:32 PM Daylight 10 hr, 59 min First quarter 63%

Map

Other gauges on the Casselman River

Gauge	Level	Compared with normal	24 hours	Distance
Casselman River at MarkletonRiver gauge, Casselman River	1.66 ft	Below flood stage	−0.10 ft	12 mi

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Savage River near BartonRiver gauge, Savage River	26.1 cfs	Normal	−3.5 cfs	9 mi
Laurel Hill Creek at UrsinaRiver gauge, Laurel Hill Creek	1.51 ft	Below flood stage	−0.07 ft	13 mi
Savage River below Savage River Dam near BloomingtonRiver gauge, Savage River	74.2 cfs	Normal	±0	14 mi
Youghiogheny River Lake at Dam near ConfluenceReservoir, Youghiogheny River Lake	1,439.64 ft	Below flood stage	−0.49 ft	14 mi
Youghiogheny River at Youghiogheny River DamRiver gauge, Youghiogheny River	1,150 cfs	High	+20.0 cfs	14 mi
Bear Creek at FriendsvilleRiver gauge, Bear Creek	53.2 cfs	High	−5.5 cfs	14 mi
Georges Creek at FranklinRiver gauge, Georges Creek	2.06 ft	Below flood stage	−0.02 ft	15 mi
North Glade Run near SwantonRiver gauge, North Glade Run	2.4 cfs	Normal	−0.3 cfs	15 mi

Questions and answers

What is flood stage for the Casselman River at Grantsville?

The official flood stage is 4.50 ft. The level is currently 3.20 ft below it.

Is gage height the same as water depth?

No. Gage height is measured from a fixed reference point chosen by the agency, so a reading of 10 ft does not mean the river is 10 ft deep.

What is the water level of Casselman River at Grantsville today?

On Oct 19, 2026, 07:45 PM EDT, the water level was 1.30 ft. Down 0.04 ft over the last 24 hours.

Is Casselman River at Grantsville rising or falling?

Down 0.04 ft over the last 24 hours.

Is the level of Casselman River at Grantsville normal?

Below flood stage. Judged against the official flood stage for this gauge.

What is the highest water level ever recorded at Casselman River at Grantsville?

The highest level on record is 10.70 ft on October 15, 1954.

How often is this data updated?

The U.S. Geological Survey publishes a new reading every 15 minutes. This page refreshes within minutes of each update.

For specialists

Station codes, datum, parameters, data quality and downloads

Operator: U.S. Geological Survey
Station code: usgs:03078000 (Agency page)
Coordinates: 39.70219, -79.13639 (WGS84)
Vertical datum: NAVD88
Update interval: every 15 minutes
Licence: Public domain. Data: U.S. Geological Survey (USGS), provisional data subject to revision

Published series

Parameter	Last value	Time (UTC)	Quality
Water level	1.30 ft	2026-10-19 23:45	Provisional
Flow	70.2 cfs	2026-10-19 23:45	Provisional

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How to cite

U.S. Geological Survey: Casselman River at Grantsville (usgs:03078000). Accessed October 20, 2026 via Nivelmap, https://nivelmap.com/en/united-states/maryland/casselman-river-at-grantsville

How we check values

Each reading is stored as published. We hold back values that jump faster than physically plausible and show the measurement time with every value.

Readings are provisional, can be delayed or wrong and are not a flood warning. Read the disclaimer