Casselman River at Markleton
Highest listed crest 16.40 ftFlood stage 9.0 ft3 crests since 1936
The Casselman River at Markleton crested above flood stage 3 times among the 3 crests the National Weather Service lists from 1936 to 2025. The highest, 16.40 ft on March 17, 1936, was minor flooding, 7.40 feet above flood stage.
The gauge
- Highest listed crest
- 16.40 ft
- March 17, 1936; 35,800 cubic feet per second
- Flood stage
- 9.0 ft
- No major stage set
- Crests at major
- 0
- 3 above flood stage
- Most recent flood crest
- May 13, 2025
- 11.63 ft, minor flooding
Flood stages
The thresholds the National Weather Service uses for this gauge today, and how many listed crests reached each.
| Flood stage (minor) | 9.0 | 3 | May 13, 2025 |
Every listed crest
3 crests from 1936 to 2025. Filled: at or above flood stage. Hover a crest for its date and stage.
Crests at or above flood stage, by decade
- These are the crests the local National Weather Service office lists for the gauge: the highest on record and recent crests. Lesser floods between them may be missing, so counts by decade are a floor.
- Categories use today's flood stages. Levees, dams and channel changes since a crest can make old and new stages not directly comparable.
Highest crests
| 1 | Mar 17, 1936 | 16.40 | +7.40 | Minor |
| 2 | Jan 19, 1996 | 13.26 | +4.26 | Minor |
| 3 | May 13, 2025 | 11.63 | +2.63 | Minor |
The worst floods along the Casselman River
For this gauge's highest crests, the other gauges on the Casselman River that crested above flood stage within a week.
January 19, 1996: 13.26 ft here, minor flooding
- GrantsvilleMD · Jan 19, 1996 · 9.15 ft · Moderate
Gauges on the Casselman River
In USGS station-number order, which runs downstream within a river basin.
| Grantsville | MD | 10.70 ft, Oct 15, 1954 | 0 |
| Markleton this gauge | PA | 16.40 ft, Mar 17, 1936 | 0 |
Other gauges in Somerset County
| Ursina | 10.63 ft, Oct 15, 1954 | 0 |
| Confluence | 21.60 ft, Mar 17, 1936 | 3 |
Somerset County: every hazard · River floods across the country · Pennsylvania
NOAA National Water Prediction Service, gauge MAKP1, retrieved October 30, 2026. Stages in feet on the gauge's own datum, not elevation. Crests are as the National Weather Service lists them; preliminary values may be revised.