Gauge Description:

The Center lines are the only part of the main falls that can't be run at summer low water. As of 2018, Minimum for Grace was nearly 3.5. The rapid next door carries more of the flow now. Above 3.8 the landing off Grace gets rowdier and there's very little time to recover if something goes wrong.

The gauge is located at Little Falls (aka Brookmont) Dam, where the river is very wide.  Consequently, an inch on the gage can translate to a foot at Great Falls.  The gage is also 8-9 miles downstream, so if the river is rising or falling rapidly there could be a discrepancy between the gage reading and the actual level.  Scout the rapids visually if there is any doubt.  (You were going to do that anyway, right?)

USGS Potomac River / Little Falls Gage

NOAA Prediction for Little Falls Gage

Gauge Information

Name Range Difficulty Updated Level
POTOMAC RIVER NEAR WASH, DC LITTLE FALLS PUMP STA
usgs-01646500 3.30 - 3.95 ft V+ 00h47m 3.95 ft (too high)
gauge class stout level for Grace, and the Fingers are fluffy. Flatliner (Ring finger) can be boofed at these levels.

gauge graph
RangeWater LevelDifficultyComment
3.00 -3.30 ft extremely Low-barely Low V+ gauge is important or has warning only the Pinky finger (Angel Hair) can be run at these levels, Do Alpine / Maryland or the VA lines instead.
3.30 -3.50 ft barely runnable-med runnable V+ gauge is important or has warning Low and a little bit pinny. Good level for the Angel Slot- Angel Hair (pinky finger) sequence on the far right.
3.50 -3.80 ft med runnable-a bit pushy runnable V+ gauge is important or has warning Classic. Grace is manageable, well padded. Ideal levels for the middle Finger.
3.75 -3.95 ft a bit pushy runnable-high runnable V+ gauge is important or has warning stout level for Grace, and the Fingers are fluffy. Flatliner (Ring finger) can be boofed at these levels.

Reports give the public a chance to report on river conditions throughout the country as well as log the history of a river.