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Hydrograph River at a Glance Download
Susquehanna River at Conowingo Dam Stage (ft)Flow (kcfs)Observed: 9.04 ft at 2:00AM Sep 28, 2014Observed: 9.03 ft at 2:15AM Sep 28, 2014Observed: 9.03 ft at 2:30AM Sep 28, 2014Observed: 9.03 ft at 2:45AM Sep 28, 2014Observed: 9.03 ft at 3:00AM Sep 28, 2014Observed: 9.03 ft at 3:15AM Sep 28, 2014Observed: 9.03 ft at 3:30AM Sep 28, 2014Observed: 9.03 ft at 3:45AM Sep 28, 2014Observed: 9.03 ft at 4:00AM Sep 28, 2014Observed: 9.03 ft at 4:15AM Sep 28, 2014Observed: 9.03 ft at 4:30AM Sep 28, 2014Observed: 9.03 ft at 4:45AM Sep 28, 2014Observed: 9.03 ft at 5:00AM Sep 28, 2014Observed: 9.03 ft at 5:15AM Sep 28, 2014Observed: 9.03 ft at 5:30AM Sep 28, 2014Observed: 9.03 ft at 5:45AM Sep 28, 2014Observed: 9.03 ft at 6:00AM Sep 28, 2014Observed: 9.02 ft at 6:15AM Sep 28, 2014Observed: 9.03 ft at 6:30AM Sep 28, 2014Observed: 9.03 ft at 6:45AM Sep 28, 2014Observed: 9.02 ft at 7:00AM Sep 28, 2014Observed: 9.02 ft at 7:15AM Sep 28, 2014Observed: 9.02 ft at 7:30AM Sep 28, 2014Observed: 9.02 ft at 7:45AM Sep 28, 2014Observed: 9.02 ft at 8:00AM Sep 28, 2014Observed: 9.02 ft at 8:15AM Sep 28, 2014Observed: 9.02 ft at 8:30AM Sep 28, 2014Observed: 9.02 ft at 8:45AM Sep 28, 2014Observed: 9.02 ft at 9:00AM Sep 28, 2014Observed: 9.02 ft at 9:15AM Sep 28, 2014Observed: 9.02 ft at 9:30AM Sep 28, 2014Observed: 9.01 ft at 9:45AM Sep 28, 2014Observed: 9.02 ft at 10:00AM Sep 28, 2014Observed: 9.02 ft at 10:15AM Sep 28, 2014Observed: 9.01 ft at 10:30AM Sep 28, 2014Observed: 9.01 ft at 10:45AM Sep 28, 2014Observed: 9.01 ft at 11:00AM Sep 28, 2014Observed: 9.01 ft at 11:15AM Sep 28, 2014Observed: 9.01 ft at 11:30AM Sep 28, 2014Observed: 9.01 ft at 11:45AM Sep 28, 2014Observed: 9.01 ft at 12:00PM Sep 28, 2014Observed: 9.01 ft at 12:15PM Sep 28, 2014Observed: 9.01 ft at 12:30PM Sep 28, 2014Observed: 9.01 ft at 12:45PM Sep 28, 2014Observed: 9.01 ft at 1:00PM Sep 28, 2014Observed: 9.01 ft at 1:15PM Sep 28, 2014Observed: 9.01 ft at 1:30PM Sep 28, 2014Observed: 9.02 ft at 1:45PM Sep 28, 2014Observed: 9.01 ft at 2:00PM Sep 28, 2014Observed: 9.02 ft at 2:15PM Sep 28, 2014Observed: 9.02 ft at 2:30PM Sep 28, 2014Observed: 9.02 ft at 2:45PM Sep 28, 2014Observed: 9.02 ft at 3:00PM Sep 28, 2014Observed: 9.02 ft at 3:15PM Sep 28, 2014Observed: 9.02 ft at 3:30PM Sep 28, 2014Observed: 9.02 ft at 3:45PM Sep 28, 2014Observed: 9.02 ft at 4:00PM Sep 28, 2014Observed: 9.02 ft at 4:15PM Sep 28, 2014Observed: 9.02 ft at 4:30PM Sep 28, 2014Observed: 9.02 ft at 4:45PM Sep 28, 2014Observed: 9.02 ft at 5:00PM Sep 28, 2014Observed: 9.02 ft at 5:15PM Sep 28, 2014Observed: 9.02 ft at 5:30PM Sep 28, 2014Observed: 9.02 ft at 5:45PM Sep 28, 2014Observed: 9.02 ft at 6:00PM Sep 28, 2014Observed: 9.02 ft at 6:15PM Sep 28, 2014Observed: 9.02 ft at 6:30PM Sep 28, 2014Observed: 9.02 ft at 6:45PM Sep 28, 2014Observed: 9.03 ft at 7:00PM Sep 28, 2014Observed: 9.02 ft at 7:15PM Sep 28, 2014Observed: 9.03 ft at 7:30PM Sep 28, 2014Observed: 9.03 ft at 7:45PM Sep 28, 2014Observed: 9.03 ft at 8:00PM Sep 28, 2014Observed: 9.03 ft at 8:15PM Sep 28, 2014Observed: 9.03 ft at 8:30PM Sep 28, 2014Observed: 9.03 ft at 8:45PM Sep 28, 2014Observed: 9.03 ft at 9:00PM Sep 28, 2014Observed: 9.03 ft at 9:15PM Sep 28, 2014Observed: 9.03 ft at 9:30PM Sep 28, 2014Observed: 9.03 ft at 9:45PM Sep 28, 2014Observed: 9.03 ft at 10:00PM Sep 28, 2014Observed: 9.03 ft at 10:15PM Sep 28, 2014Observed: 9.03 ft at 10:30PM Sep 28, 2014Observed: 9.03 ft at 10:45PM Sep 28, 2014Observed: 9.03 ft at 11:00PM Sep 28, 2014Observed: 9.03 ft at 11:15PM Sep 28, 2014Observed: 9.03 ft at 11:30PM Sep 28, 2014Observed: 9.03 ft at 11:45PM Sep 28, 2014Observed: 9.03 ft at 12:00AM Sep 29, 2014Observed: 9.03 ft at 12:15AM Sep 29, 2014Observed: 9.03 ft at 12:30AM Sep 29, 2014Observed: 9.03 ft at 12:45AM Sep 29, 2014Observed: 9.03 ft at 1:00AM Sep 29, 2014Observed: 9.03 ft at 1:15AM Sep 29, 2014Observed: 9.03 ft at 1:30AM Sep 29, 2014Observed: 9.03 ft at 1:45AM Sep 29, 2014Observed: 9.03 ft at 2:00AM Sep 29, 2014Observed: 9.03 ft at 2:15AM Sep 29, 2014Observed: 9.03 ft at 2:30AM Sep 29, 2014Observed: 9.03 ft at 2:45AM Sep 29, 2014Observed: 9.03 ft at 3:00AM Sep 29, 2014Observed: 9.03 ft at 3:15AM Sep 29, 2014Observed: 9.03 ft at 3:30AM Sep 29, 2014Observed: 9.03 ft at 3:45AM Sep 29, 2014Observed: 9.03 ft at 4:00AM Sep 29, 2014Observed: 9.03 ft at 4:15AM Sep 29, 2014Observed: 9.03 ft at 4:30AM Sep 29, 2014Observed: 9.03 ft at 4:45AM Sep 29, 2014Observed: 9.03 ft at 5:00AM Sep 29, 2014Observed: 9.03 ft at 5:15AM Sep 29, 2014Observed: 9.03 ft at 5:30AM Sep 29, 2014Observed: 9.03 ft at 5:45AM Sep 29, 2014Observed: 9.03 ft at 6:00AM Sep 29, 2014Observed: 9.02 ft at 6:15AM Sep 29, 2014Observed: 9.01 ft at 6:30AM Sep 29, 2014Observed: 9.01 ft at 6:45AM Sep 29, 2014Observed: 9.01 ft at 7:00AM Sep 29, 2014Observed: 9 ft at 7:15AM Sep 29, 2014Observed: 9 ft at 7:30AM Sep 29, 2014Observed: 9 ft at 7:45AM Sep 29, 2014Observed: 9 ft at 8:00AM Sep 29, 2014Observed: 9 ft at 8:15AM Sep 29, 2014Observed: 9 ft at 8:30AM Sep 29, 2014Observed: 9 ft at 8:45AM Sep 29, 2014Observed: 9 ft at 9:00AM Sep 29, 2014Observed: 9 ft at 9:15AM Sep 29, 2014Observed: 9 ft at 9:30AM Sep 29, 2014Observed: 9 ft at 9:45AM Sep 29, 2014Observed: 9.01 ft at 10:00AM Sep 29, 2014Observed: 9.01 ft at 10:15AM Sep 29, 2014Observed: 9.01 ft at 10:30AM Sep 29, 2014Observed: 9.01 ft at 10:45AM Sep 29, 2014Observed: 9.01 ft at 11:00AM Sep 29, 2014Observed: 9.01 ft at 11:15AM Sep 29, 2014Observed: 9.01 ft at 11:30AM Sep 29, 2014Observed: 9.01 ft at 11:45AM Sep 29, 2014Observed: 9.01 ft at 12:00PM Sep 29, 2014Observed: 9.02 ft at 12:15PM Sep 29, 2014Observed: 9.02 ft at 12:30PM Sep 29, 2014Observed: 9.01 ft at 12:45PM Sep 29, 2014Observed: 9.01 ft at 1:00PM Sep 29, 2014Observed: 9.02 ft at 1:15PM Sep 29, 2014Observed: 9.02 ft at 1:30PM Sep 29, 2014Observed: 9.02 ft at 1:45PM Sep 29, 2014Observed: 9.02 ft at 2:00PM Sep 29, 2014Observed: 9.01 ft at 2:15PM Sep 29, 2014Observed: 9.02 ft at 2:30PM Sep 29, 2014Observed: 9.02 ft at 2:45PM Sep 29, 2014Observed: 9.01 ft at 3:00PM Sep 29, 2014Observed: 9.02 ft at 3:15PM Sep 29, 2014Observed: 9.01 ft at 3:30PM Sep 29, 2014Observed: 9.02 ft at 3:45PM Sep 29, 2014Observed: 9.01 ft at 4:00PM Sep 29, 2014Observed: 9.01 ft at 4:15PM Sep 29, 2014Observed: 9 ft at 4:30PM Sep 29, 2014Observed: 9.01 ft at 4:45PM Sep 29, 2014Observed: 9 ft at 5:00PM Sep 29, 2014Observed: 10.36 ft at 5:15PM Sep 29, 2014Observed: 12.32 ft at 5:30PM Sep 29, 2014Observed: 13.52 ft at 5:45PM Sep 29, 2014Observed: 14.07 ft at 6:00PM Sep 29, 2014Observed: 14.18 ft at 6:15PM Sep 29, 2014Observed: 14.2 ft at 6:30PM Sep 29, 2014Observed: 14.22 ft at 6:45PM Sep 29, 2014Highest Observation: 14.23 ft at 7:00PM Sep 29, 2014Observed: 14.03 ft at 7:15PM Sep 29, 2014Observed: 12.45 ft at 7:30PM Sep 29, 2014Observed: 11.07 ft at 7:45PM Sep 29, 2014Observed: 10.09 ft at 8:00PM Sep 29, 2014Observed: 9.55 ft at 8:15PM Sep 29, 2014Observed: 9.33 ft at 8:30PM Sep 29, 2014Observed: 9.22 ft at 8:45PM Sep 29, 2014Observed: 9.17 ft at 9:00PM Sep 29, 2014Observed: 9.12 ft at 9:15PM Sep 29, 2014Observed: 9.09 ft at 9:30PM Sep 29, 2014Observed: 9.07 ft at 9:45PM Sep 29, 2014Observed: 9.05 ft at 10:00PM Sep 29, 2014Observed: 9.04 ft at 10:15PM Sep 29, 2014Observed: 9.04 ft at 10:30PM Sep 29, 2014Observed: 9.03 ft at 10:45PM Sep 29, 2014Observed: 9.03 ft at 11:00PM Sep 29, 2014Observed: 9.02 ft at 11:15PM Sep 29, 2014Observed: 9.01 ft at 11:30PM Sep 29, 2014Observed: 9.01 ft at 11:45PM Sep 29, 2014Observed: 9.01 ft at 12:00AM Sep 30, 2014Observed: 9 ft at 12:15AM Sep 30, 2014Observed: 9 ft at 12:30AM Sep 30, 2014Observed: 9 ft at 12:45AM Sep 30, 2014Observed: 9 ft at 1:00AM Sep 30, 2014Observed: 9 ft at 1:15AM Sep 30, 2014Observed: 9 ft at 1:30AM Sep 30, 2014Observed: 9 ft at 1:45AM Sep 30, 2014Observed: 9 ft at 2:00AM Sep 30, 2014Observed: 9 ft at 2:15AM Sep 30, 2014Observed: 9 ft at 2:30AM Sep 30, 2014Observed: 9 ft at 2:45AM Sep 30, 2014Observed: 9 ft at 3:00AM Sep 30, 2014Observed: 9 ft at 3:15AM Sep 30, 2014Observed: 9 ft at 3:30AM Sep 30, 2014Observed: 9 ft at 3:45AM Sep 30, 2014Observed: 9 ft at 4:00AM Sep 30, 2014Observed: 8.99 ft at 4:15AM Sep 30, 2014Observed: 9 ft at 4:30AM Sep 30, 2014Observed: 8.99 ft at 4:45AM Sep 30, 2014Observed: 8.99 ft at 5:00AM Sep 30, 2014Observed: 8.99 ft at 5:15AM Sep 30, 2014Observed: 8.99 ft at 5:30AM Sep 30, 2014Observed: 8.99 ft at 5:45AM Sep 30, 2014Observed: 8.99 ft at 6:00AM Sep 30, 2014Observed: 8.99 ft at 6:15AM Sep 30, 2014Observed: 8.99 ft at 6:30AM Sep 30, 2014Observed: 8.99 ft at 6:45AM Sep 30, 2014Observed: 8.99 ft at 7:00AM Sep 30, 2014Observed: 8.99 ft at 7:15AM Sep 30, 2014Observed: 8.99 ft at 7:30AM Sep 30, 2014Observed: 8.99 ft at 7:45AM Sep 30, 2014Observed: 8.99 ft at 8:00AM Sep 30, 2014Observed: 8.99 ft at 8:15AM Sep 30, 2014Observed: 8.99 ft at 8:30AM Sep 30, 2014Observed: 8.99 ft at 8:45AM Sep 30, 2014Observed: 8.98 ft at 9:00AM Sep 30, 2014Observed: 8.98 ft at 9:15AM Sep 30, 2014Observed: 8.98 ft at 9:30AM Sep 30, 2014Observed: 8.98 ft at 9:45AM Sep 30, 2014Observed: 8.99 ft at 10:00AM Sep 30, 2014Observed: 8.99 ft at 10:15AM Sep 30, 2014Observed: 8.98 ft at 10:30AM Sep 30, 2014Observed: 8.98 ft at 10:45AM Sep 30, 2014Observed: 8.99 ft at 11:00AM Sep 30, 2014Observed: 8.98 ft at 11:15AM Sep 30, 2014Observed: 8.98 ft at 11:30AM Sep 30, 2014Observed: 8.99 ft at 11:45AM Sep 30, 2014Observed: 8.99 ft at 12:00PM Sep 30, 2014Observed: 8.98 ft at 12:15PM Sep 30, 2014Observed: 8.99 ft at 12:30PM Sep 30, 2014Observed: 8.99 ft at 12:45PM Sep 30, 2014Observed: 8.99 ft at 1:00PM Sep 30, 2014Observed: 8.99 ft at 1:15PM Sep 30, 2014Observed: 8.99 ft at 1:30PM Sep 30, 2014Observed: 8.99 ft at 1:45PM Sep 30, 2014Observed: 8.99 ft at 2:00PM Sep 30, 2014Observed: 8.99 ft at 2:15PM Sep 30, 2014Observed: 8.99 ft at 2:30PM Sep 30, 2014Observed: 8.99 ft at 2:45PM Sep 30, 2014Observed: 8.99 ft at 3:00PM Sep 30, 2014Observed: 8.99 ft at 3:15PM Sep 30, 2014Observed: 8.99 ft at 3:30PM Sep 30, 2014Observed: 8.99 ft at 3:45PM Sep 30, 2014Observed: 8.99 ft at 4:00PM Sep 30, 2014Observed: 8.99 ft at 4:15PM Sep 30, 2014Observed: 8.99 ft at 4:30PM Sep 30, 2014Observed: 8.99 ft at 4:45PM Sep 30, 2014Observed: 8.99 ft at 5:00PM Sep 30, 2014Observed: 8.99 ft at 5:15PM Sep 30, 2014Observed: 8.99 ft at 5:30PM Sep 30, 2014Observed: 8.99 ft at 5:45PM Sep 30, 2014Observed: 8.99 ft at 6:00PM Sep 30, 2014Observed: 8.99 ft at 6:15PM Sep 30, 2014Observed: 8.99 ft at 6:30PM Sep 30, 2014Observed: 8.99 ft at 6:45PM Sep 30, 2014Observed: 8.99 ft at 7:00PM Sep 30, 2014Observed: 8.99 ft at 7:15PM Sep 30, 2014Observed: 9.26 ft at 7:30PM Sep 30, 2014Observed: 11.17 ft at 7:45PM Sep 30, 2014Observed: 12.52 ft at 8:00PM Sep 30, 2014Observed: 13.16 ft at 8:15PM Sep 30, 2014Observed: 13.3 ft at 8:30PM Sep 30, 2014Observed: 13.37 ft at 8:45PM Sep 30, 2014Observed: 13.41 ft at 9:00PM Sep 30, 2014Observed: 13.43 ft at 9:15PM Sep 30, 2014Observed: 12.22 ft at 9:30PM Sep 30, 2014Observed: 10.93 ft at 9:45PM Sep 30, 2014Observed: 10.01 ft at 10:00PM Sep 30, 2014Observed: 9.52 ft at 10:15PM Sep 30, 2014Observed: 9.31 ft at 10:30PM Sep 30, 2014Observed: 9.2 ft at 10:45PM Sep 30, 2014Observed: 9.16 ft at 11:00PM Sep 30, 2014Observed: 9.11 ft at 11:15PM Sep 30, 2014Observed: 9.08 ft at 11:30PM Sep 30, 2014Observed: 9.05 ft at 11:45PM Sep 30, 2014Observed: 9.04 ft at 12:00AM Oct 01, 2014Observed: 9.04 ft at 12:15AM Oct 01, 2014Observed: 9.02 ft at 12:30AM Oct 01, 2014USGS--Water Resources of the United StatesCNWM2(plotting HGIRG) Graph Created (1:47AM Oct 1, 2014)ObservedLatest observed value: 9.02 ft at 12:30 AM EDT 1-Oct-2014. Flood Stage is 23.5 ft
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About this graph
Tabular Data (UTC)
Tabular Data (EDT)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: Gauge reading affected by power generation.

NOTE: Forecasts for the Susquehanna River at Conowingo Dam are issued as needed during times of high water, but are not routinely available.

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Upstream Gauge - at Marietta Upstream Gauge
Flood Categories (in feet)
Major Flood Stage:28.5
Moderate Flood Stage:24.8
Flood Stage:23.5
Action Stage:21.5

Historical Crests
(1) 36.83 ft on 06/24/1972
(2) 34.18 ft on 01/20/1996
(3) 32.41 ft on 09/09/2011
(4) 30.92 ft on 09/27/1975
(5) 30.07 ft on 09/19/2004 (P)
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(P): Preliminary values subject to further review.

Low Water Records
Currently none available.

For more information on your flood risk go to www.floodsmart.gov.

Zoom Level:16
KML Image
Gauge LocationGauge Map Marker
Disclaimer
Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.
Flood Impacts & Photos Collapse
If you notice any errors in the below information, please contact our Webmaster
31 Notification level 9 with 43 to 53 gates open at Conowingo Dam.
29.4 Notification level 8 with 36 to 42 gates open at Conowingo Dam.
28.5 Notification level 7 with 33 to 35 gates open at Conowingo Dam.
26.3 Notification level 6 with 26 to 32 gates open at Conowingo Dam.
24.8 Notification level 5 with 21 to 25 gates open at Conowingo Dam. Backyards and basements on Main Street and Tome's Landing begin to flood.
23.7 Notification level 4 with 18 to 20 gates open at Conowing Dam. Minor flooding begins in the town of Port Deposit Maryland.
22.9 Notification level 3 with 16 to 17 gates open at Conowingo Dam. Maryland route 222 north of Port Deposit closed.
21.5 Notification level 2 with 12 to 15 gates open at Conowingo Dam.
20 Notification level 1 with 10 to 11 gates open at Conowingo dam.
About This Location Collapse

Latitude: 39.657778° N, Longitude: 76.174444° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 23.5 ft Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
Vertical Datum Elevation
(gauge height = 0)
Elevation
(gauge height = flood stage)
Elevation information source
NAVD88 Not Available Not Available Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 5 ft 28.5 ft Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other Not Available Not Available  

Current/Historical Observations:

Additional Information Collapse
During winter months, cold and ice may result in inaccurate real-time stream stage and streamflow data. Adjustments or deletions of this data can only be done after detailed analysis.
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Hydrologic Resources Additional Resources
Collaborative Agencies Collapse
The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.
NWS Information
National Weather Service
Philadelphia/Mount Holly Weather Forecast Office
732 Woodlane Road
Mount Holly, NJ 08060-9615
(609) 261-6600
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Page last modified: 5-Aug-2014 6:39 PM
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