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Unadilla River at Rockdale, NY (RCKN6)

Data Type




Inundation Levels
NAVD88 Stage

1,007.2*15.3*
Record Crest: 14.22 ft
1,005.914.0
Major Flooding Begins

1,004.913.0
Moderate Flooding Begins

1,003.912.0
Minor Flooding Begins

1,002.911.0
1,001.910.0
1,000.99.0
Near Flooding Begins

999.98.0
Below Flooding Begins

* = Extended rating
Weather Forecast Office Binghamton, NY Middle Atlantic River Forecast Center
Hydrograph River at a Glance Download Inundation
Mapping
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Click on mapped inundation to see water depth values for that location, or hold shift and drag to zoom to area.

Current Stage:
5.5 ft at 04/23/2024 12:30:00 UTC
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Inundation Legend
Depth in feet
USGS Gauge Location Gauge Location
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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.

Gauge Information Collapse

Map Overlays
Flood Categories (in feet)
Major Flood Stage: 13
Moderate Flood Stage: 12
Flood Stage: 11
Action Stage: 8
Low Stage (in feet): -9999

Historic Crests
(1) 14.22 ft on 09/08/2011
(2) 13.96 ft on 06/29/2006
(3) 12.98 ft on 12/31/1942
(4) 12.64 ft on 03/14/1977
(5) 12.62 ft on 03/26/1979
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 14.22 ft on 09/08/2011
(2) 13.96 ft on 06/29/2006
(3) 11.83 ft on 04/04/2005
(4) 11.04 ft on 04/10/2001
(5) 11.81 ft on 02/28/2000
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.

Graphical representation of flood inundation for NWS flood categories are based on steady state hydraulic modeling of water surface elevations for incremented discharges. Map shows approximate inundation areas for given water surface elevations and should not be used for navigation or permitting or other legal purposes, but strictly as a planning reference tool.

Site-specific information:
A report discussing the technical aspects of these maps can be found here. These maps represent unobstructed flow conditions and may be unrepresentative when ice jams and/or debris are in place.

Extended rating:
Rating Curve Extension - The Rating Curve Extension is calculated by using either a linear, logarithmic, or hydraulic technique to extend the rating curve above the currently established relationship between stage and flow.
Flood Impacts Collapse
If you notice any errors in the below information, please contact our Webmaster
14.22 Record flood event of september 2011. Widespread and severe flood inundation occurred to residences and businesses along the river. Millions of dollars in damage were reported.
13.96 Flood level of June 2006. Flooding was widespread and severe with water several feet deep in many locations near the river along Route 8 from Mount Upton to Sidney.
13 Major flood stage. Much of Route 8 is flooded north and south of Rockdale including several residences and businesses. Flooding threatens residences in Mount Upton along Bridge Street. Damages at this stage are typically severe.
12.6 Numerous cellars along the river are flooded.
12 Moderate flood stage. Several homes and businesses are flooded in various spots along Route 8 between Rockwells Mills and Sidney. Flooding reaches properties and residences on County Route 1 at Rockdale. Hitching Post Lane floods. Residences on County Road 1B and the lower parts of Tall Pines Campground are flooded.
11 Flood stage. Widespread flooding of farmland occurs along the river. County Route 8 at the intersection of High Bridge Road is flooded.
Photos
(1) looking upstream
(2) view of gagehouse
(3) looking downstream
Other Data Sources Collapse
Additional Information Collapse
Potential River Levels - Used to
Potential River Levels
Used to Estimate the Chance of Flooding and the Range of Possible River Levels
10 Day (HEFS) 7 Day (NAEFS) 7 Day (GEFS)
HEFS Ensemble NAEFS Ensemble GEFS Ensemble

Note: Use the official hydrograph at the top of this web page for river levels within the next 72 Hours.

Click individual graphics to enlarge.
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Graphical representation of flood inundation for NWS flood categories are based on steady state hydraulic modeling of water surface elevations for incremented discharges. Map shows approximate inundation areas for given water surface elevations and should not be used for navigation or permitting or other legal purposes, but strictly as a planning reference tool.