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Hydrograph River at a Glance Download
Assabet River at Maynard Stage (ft)Flow (kcfs)Highest Observation: 1.77 ft at 1:45PM May 24, 2015Highest Observation: 1.77 ft at 2:00PM May 24, 2015Observed: 1.76 ft at 2:15PM May 24, 2015Observed: 1.76 ft at 2:30PM May 24, 2015Observed: 1.76 ft at 2:45PM May 24, 2015Observed: 1.76 ft at 3:00PM May 24, 2015Observed: 1.76 ft at 3:15PM May 24, 2015Observed: 1.76 ft at 3:30PM May 24, 2015Observed: 1.76 ft at 3:45PM May 24, 2015Observed: 1.76 ft at 4:00PM May 24, 2015Observed: 1.75 ft at 4:15PM May 24, 2015Observed: 1.75 ft at 4:30PM May 24, 2015Observed: 1.74 ft at 4:45PM May 24, 2015Observed: 1.74 ft at 5:00PM May 24, 2015Observed: 1.74 ft at 5:15PM May 24, 2015Observed: 1.74 ft at 5:30PM May 24, 2015Observed: 1.74 ft at 5:45PM May 24, 2015Observed: 1.73 ft at 6:00PM May 24, 2015Observed: 1.73 ft at 6:15PM May 24, 2015Observed: 1.73 ft at 6:30PM May 24, 2015Observed: 1.72 ft at 6:45PM May 24, 2015Observed: 1.71 ft at 7:00PM May 24, 2015Observed: 1.71 ft at 7:15PM May 24, 2015Observed: 1.71 ft at 7:30PM May 24, 2015Observed: 1.71 ft at 7:45PM May 24, 2015Observed: 1.71 ft at 8:00PM May 24, 2015Observed: 1.71 ft at 8:15PM May 24, 2015Observed: 1.7 ft at 8:30PM May 24, 2015Observed: 1.7 ft at 8:45PM May 24, 2015Observed: 1.7 ft at 9:00PM May 24, 2015Observed: 1.7 ft at 9:15PM May 24, 2015Observed: 1.7 ft at 9:30PM May 24, 2015Observed: 1.7 ft at 9:45PM May 24, 2015Observed: 1.7 ft at 10:00PM May 24, 2015Observed: 1.7 ft at 10:15PM May 24, 2015Observed: 1.69 ft at 10:30PM May 24, 2015Observed: 1.69 ft at 10:45PM May 24, 2015Observed: 1.69 ft at 11:00PM May 24, 2015Observed: 1.69 ft at 11:15PM May 24, 2015Observed: 1.69 ft at 11:30PM May 24, 2015Observed: 1.69 ft at 11:45PM May 24, 2015Observed: 1.7 ft at 12:00AM May 25, 2015Observed: 1.68 ft at 12:15AM May 25, 2015Observed: 1.68 ft at 12:30AM May 25, 2015Observed: 1.68 ft at 12:45AM May 25, 2015Observed: 1.67 ft at 1:00AM May 25, 2015Observed: 1.68 ft at 1:15AM May 25, 2015Observed: 1.68 ft at 1:30AM May 25, 2015Observed: 1.68 ft at 1:45AM May 25, 2015Observed: 1.68 ft at 2:00AM May 25, 2015Observed: 1.68 ft at 2:15AM May 25, 2015Observed: 1.68 ft at 2:30AM May 25, 2015Observed: 1.68 ft at 2:45AM May 25, 2015Observed: 1.68 ft at 3:00AM May 25, 2015Observed: 1.68 ft at 3:15AM May 25, 2015Observed: 1.68 ft at 3:30AM May 25, 2015Observed: 1.68 ft at 3:45AM May 25, 2015Observed: 1.68 ft at 4:00AM May 25, 2015Observed: 1.68 ft at 4:15AM May 25, 2015Observed: 1.68 ft at 4:30AM May 25, 2015Observed: 1.68 ft at 4:45AM May 25, 2015Observed: 1.68 ft at 5:00AM May 25, 2015Observed: 1.7 ft at 5:15AM May 25, 2015Observed: 1.68 ft at 5:30AM May 25, 2015Observed: 1.68 ft at 5:45AM May 25, 2015Observed: 1.68 ft at 6:00AM May 25, 2015Observed: 1.68 ft at 6:15AM May 25, 2015Observed: 1.68 ft at 6:30AM May 25, 2015Observed: 1.68 ft at 6:45AM May 25, 2015Observed: 1.68 ft at 7:00AM May 25, 2015Observed: 1.69 ft at 7:15AM May 25, 2015Observed: 1.69 ft at 7:30AM May 25, 2015Observed: 1.69 ft at 7:45AM May 25, 2015Observed: 1.69 ft at 8:00AM May 25, 2015Observed: 1.69 ft at 8:15AM May 25, 2015Observed: 1.69 ft at 8:30AM May 25, 2015Observed: 1.72 ft at 8:45AM May 25, 2015Observed: 1.69 ft at 9:00AM May 25, 2015Observed: 1.7 ft at 9:15AM May 25, 2015Observed: 1.7 ft at 9:30AM May 25, 2015Observed: 1.7 ft at 9:45AM May 25, 2015Observed: 1.7 ft at 10:00AM May 25, 2015Observed: 1.7 ft at 10:15AM May 25, 2015Observed: 1.71 ft at 10:30AM May 25, 2015Observed: 1.71 ft at 10:45AM May 25, 2015Observed: 1.71 ft at 11:00AM May 25, 2015Observed: 1.71 ft at 11:15AM May 25, 2015Observed: 1.72 ft at 11:30AM May 25, 2015Observed: 1.72 ft at 11:45AM May 25, 2015Observed: 1.72 ft at 12:00PM May 25, 2015Observed: 1.71 ft at 12:15PM May 25, 2015Observed: 1.71 ft at 12:30PM May 25, 2015Observed: 1.7 ft at 12:45PM May 25, 2015Observed: 1.7 ft at 1:00PM May 25, 2015Observed: 1.7 ft at 1:15PM May 25, 2015Observed: 1.69 ft at 1:30PM May 25, 2015Observed: 1.7 ft at 1:45PM May 25, 2015Observed: 1.7 ft at 2:00PM May 25, 2015Observed: 1.71 ft at 2:15PM May 25, 2015Observed: 1.7 ft at 2:30PM May 25, 2015Observed: 1.7 ft at 2:45PM May 25, 2015Observed: 1.7 ft at 3:00PM May 25, 2015Observed: 1.7 ft at 3:15PM May 25, 2015Observed: 1.7 ft at 3:30PM May 25, 2015Observed: 1.7 ft at 3:45PM May 25, 2015Observed: 1.7 ft at 4:00PM May 25, 2015Observed: 1.69 ft at 4:15PM May 25, 2015Observed: 1.7 ft at 4:30PM May 25, 2015Observed: 1.7 ft at 4:45PM May 25, 2015Observed: 1.7 ft at 5:00PM May 25, 2015Observed: 1.7 ft at 5:15PM May 25, 2015Observed: 1.71 ft at 5:30PM May 25, 2015Observed: 1.7 ft at 5:45PM May 25, 2015Observed: 1.71 ft at 6:00PM May 25, 2015Observed: 1.71 ft at 6:15PM May 25, 2015Observed: 1.71 ft at 6:30PM May 25, 2015Observed: 1.71 ft at 6:45PM May 25, 2015Observed: 1.71 ft at 7:00PM May 25, 2015Observed: 1.71 ft at 7:15PM May 25, 2015Observed: 1.71 ft at 7:30PM May 25, 2015Observed: 1.71 ft at 7:45PM May 25, 2015Observed: 1.71 ft at 8:00PM May 25, 2015Observed: 1.71 ft at 8:15PM May 25, 2015Observed: 1.71 ft at 8:30PM May 25, 2015Observed: 1.7 ft at 8:45PM May 25, 2015Observed: 1.7 ft at 9:00PM May 25, 2015Observed: 1.7 ft at 9:15PM May 25, 2015Observed: 1.7 ft at 9:30PM May 25, 2015Observed: 1.69 ft at 9:45PM May 25, 2015Observed: 1.69 ft at 10:00PM May 25, 2015Observed: 1.69 ft at 10:15PM May 25, 2015Observed: 1.69 ft at 10:30PM May 25, 2015Observed: 1.69 ft at 10:45PM May 25, 2015Observed: 1.69 ft at 11:00PM May 25, 2015Observed: 1.69 ft at 11:15PM May 25, 2015Observed: 1.69 ft at 11:30PM May 25, 2015Observed: 1.69 ft at 11:45PM May 25, 2015Observed: 1.69 ft at 12:00AM May 26, 2015Observed: 1.69 ft at 12:15AM May 26, 2015Observed: 1.69 ft at 12:30AM May 26, 2015Observed: 1.7 ft at 12:45AM May 26, 2015Observed: 1.7 ft at 1:00AM May 26, 2015Observed: 1.7 ft at 1:15AM May 26, 2015Observed: 1.71 ft at 1:30AM May 26, 2015Observed: 1.7 ft at 1:45AM May 26, 2015Observed: 1.7 ft at 2:00AM May 26, 2015Observed: 1.7 ft at 2:15AM May 26, 2015Observed: 1.7 ft at 2:30AM May 26, 2015Observed: 1.7 ft at 2:45AM May 26, 2015Observed: 1.69 ft at 3:00AM May 26, 2015Observed: 1.68 ft at 3:15AM May 26, 2015Observed: 1.68 ft at 3:30AM May 26, 2015Observed: 1.68 ft at 3:45AM May 26, 2015Observed: 1.68 ft at 4:00AM May 26, 2015Observed: 1.68 ft at 4:15AM May 26, 2015Observed: 1.68 ft at 4:30AM May 26, 2015Observed: 1.68 ft at 4:45AM May 26, 2015Observed: 1.69 ft at 5:00AM May 26, 2015Observed: 1.69 ft at 5:15AM May 26, 2015Observed: 1.69 ft at 5:30AM May 26, 2015Observed: 1.69 ft at 5:45AM May 26, 2015Observed: 1.69 ft at 6:00AM May 26, 2015Observed: 1.69 ft at 6:15AM May 26, 2015Observed: 1.69 ft at 6:30AM May 26, 2015Observed: 1.68 ft at 6:45AM May 26, 2015Observed: 1.69 ft at 7:00AM May 26, 2015Observed: 1.69 ft at 7:15AM May 26, 2015Observed: 1.68 ft at 7:30AM May 26, 2015Observed: 1.68 ft at 7:45AM May 26, 2015Observed: 1.68 ft at 8:00AM May 26, 2015Observed: 1.68 ft at 8:15AM May 26, 2015Observed: 1.68 ft at 8:30AM May 26, 2015Observed: 1.68 ft at 8:45AM May 26, 2015Observed: 1.68 ft at 9:00AM May 26, 2015Observed: 1.69 ft at 9:15AM May 26, 2015Observed: 1.69 ft at 9:30AM May 26, 2015Observed: 1.68 ft at 9:45AM May 26, 2015Observed: 1.68 ft at 10:00AM May 26, 2015Observed: 1.68 ft at 10:15AM May 26, 2015Observed: 1.68 ft at 10:30AM May 26, 2015Observed: 1.68 ft at 10:45AM May 26, 2015Observed: 1.68 ft at 11:00AM May 26, 2015Observed: 1.68 ft at 11:15AM May 26, 2015Observed: 1.68 ft at 11:30AM May 26, 2015Observed: 1.67 ft at 11:45AM May 26, 2015Observed: 1.67 ft at 12:00PM May 26, 2015Observed: 1.67 ft at 12:15PM May 26, 2015Observed: 1.67 ft at 12:30PM May 26, 2015Observed: 1.67 ft at 12:45PM May 26, 2015Observed: 1.68 ft at 1:00PM May 26, 2015Observed: 1.68 ft at 1:15PM May 26, 2015Observed: 1.68 ft at 1:30PM May 26, 2015Observed: 1.68 ft at 1:45PM May 26, 2015Observed: 1.7 ft at 2:00PM May 26, 2015Observed: 1.68 ft at 2:15PM May 26, 2015Observed: 1.69 ft at 2:30PM May 26, 2015Observed: 1.68 ft at 2:45PM May 26, 2015Observed: 1.69 ft at 3:00PM May 26, 2015Observed: 1.68 ft at 3:15PM May 26, 2015Observed: 1.68 ft at 3:30PM May 26, 2015Observed: 1.68 ft at 3:45PM May 26, 2015Observed: 1.69 ft at 4:00PM May 26, 2015Observed: 1.68 ft at 4:15PM May 26, 2015Observed: 1.69 ft at 4:30PM May 26, 2015Observed: 1.69 ft at 4:45PM May 26, 2015Observed: 1.68 ft at 5:00PM May 26, 2015Observed: 1.68 ft at 5:15PM May 26, 2015Observed: 1.68 ft at 5:30PM May 26, 2015Observed: 1.68 ft at 5:45PM May 26, 2015Observed: 1.67 ft at 6:00PM May 26, 2015Observed: 1.67 ft at 6:15PM May 26, 2015Observed: 1.67 ft at 6:30PM May 26, 2015Observed: 1.67 ft at 6:45PM May 26, 2015Observed: 1.66 ft at 7:00PM May 26, 2015Observed: 1.66 ft at 7:15PM May 26, 2015Observed: 1.65 ft at 7:30PM May 26, 2015Observed: 1.65 ft at 7:45PM May 26, 2015Observed: 1.65 ft at 8:00PM May 26, 2015Observed: 1.65 ft at 8:15PM May 26, 2015Observed: 1.65 ft at 8:30PM May 26, 2015Observed: 1.66 ft at 8:45PM May 26, 2015Observed: 1.66 ft at 9:00PM May 26, 2015Observed: 1.66 ft at 9:15PM May 26, 2015Observed: 1.66 ft at 9:30PM May 26, 2015Observed: 1.65 ft at 9:45PM May 26, 2015Observed: 1.65 ft at 10:00PM May 26, 2015Observed: 1.66 ft at 10:15PM May 26, 2015Observed: 1.66 ft at 10:30PM May 26, 2015Observed: 1.65 ft at 10:45PM May 26, 2015Observed: 1.65 ft at 11:00PM May 26, 2015Observed: 1.65 ft at 11:15PM May 26, 2015Observed: 1.65 ft at 11:30PM May 26, 2015Observed: 1.65 ft at 11:45PM May 26, 2015Observed: 1.65 ft at 12:00AM May 27, 2015Observed: 1.66 ft at 12:15AM May 27, 2015Observed: 1.66 ft at 12:30AM May 27, 2015Observed: 1.66 ft at 12:45AM May 27, 2015Observed: 1.66 ft at 1:00AM May 27, 2015Observed: 1.66 ft at 1:15AM May 27, 2015Observed: 1.66 ft at 1:30AM May 27, 2015Observed: 1.66 ft at 1:45AM May 27, 2015Observed: 1.66 ft at 2:00AM May 27, 2015Observed: 1.66 ft at 2:15AM May 27, 2015Observed: 1.65 ft at 2:30AM May 27, 2015Observed: 1.66 ft at 2:45AM May 27, 2015Observed: 1.66 ft at 3:00AM May 27, 2015Observed: 1.66 ft at 3:15AM May 27, 2015Observed: 1.66 ft at 3:30AM May 27, 2015Observed: 1.66 ft at 3:45AM May 27, 2015Observed: 1.66 ft at 4:00AM May 27, 2015Observed: 1.66 ft at 4:15AM May 27, 2015Observed: 1.66 ft at 4:30AM May 27, 2015Observed: 1.67 ft at 4:45AM May 27, 2015Observed: 1.67 ft at 5:00AM May 27, 2015Observed: 1.67 ft at 5:15AM May 27, 2015Observed: 1.66 ft at 5:30AM May 27, 2015Observed: 1.67 ft at 5:45AM May 27, 2015Observed: 1.66 ft at 6:00AM May 27, 2015Observed: 1.66 ft at 6:15AM May 27, 2015Observed: 1.66 ft at 6:30AM May 27, 2015Observed: 1.66 ft at 6:45AM May 27, 2015Observed: 1.66 ft at 7:00AM May 27, 2015Observed: 1.66 ft at 7:15AM May 27, 2015Observed: 1.66 ft at 7:30AM May 27, 2015Observed: 1.67 ft at 7:45AM May 27, 2015Observed: 1.67 ft at 8:00AM May 27, 2015Observed: 1.67 ft at 8:15AM May 27, 2015Observed: 1.67 ft at 8:30AM May 27, 2015Observed: 1.68 ft at 8:45AM May 27, 2015Observed: 1.68 ft at 9:00AM May 27, 2015Observed: 1.68 ft at 9:15AM May 27, 2015Observed: 1.68 ft at 9:30AM May 27, 2015Observed: 1.69 ft at 9:45AM May 27, 2015Observed: 1.69 ft at 10:00AM May 27, 2015Observed: 1.69 ft at 10:15AM May 27, 2015Observed: 1.69 ft at 10:30AM May 27, 2015Observed: 1.69 ft at 10:45AM May 27, 2015Observed: 1.69 ft at 11:00AM May 27, 2015Observed: 1.69 ft at 11:15AM May 27, 2015Observed: 1.69 ft at 11:30AM May 27, 2015Observed: 1.69 ft at 11:45AM May 27, 2015Observed: 1.68 ft at 12:00PM May 27, 2015Observed: 1.69 ft at 12:15PM May 27, 2015Forecast: 1.6 ft 2:00PM May 27, 2015Forecast: 1.6 ft 8:00PM May 27, 2015Forecast: 1.6 ft 2:00AM May 28, 2015Forecast: 1.6 ft 8:00AM May 28, 2015Forecast: 1.6 ft 2:00PM May 28, 2015Forecast: 1.6 ft 8:00PM May 28, 2015Highest Forecast: 1.7 ft 2:00AM May 29, 2015Forecast: 1.6 ft 8:00AM May 29, 2015Forecast: 1.6 ft 2:00PM May 29, 2015Forecast: 1.6 ft 8:00PM May 29, 2015Forecast: 1.6 ft 2:00AM May 30, 2015Forecast: 1.6 ft 8:00AM May 30, 2015USGS--Water Resources of the United StatesMAYM3(plotting HGIRG) Graph Created (1:30PM May 27, 2015)ObservedForecast (issued 10:49AM May 27)Latest observed value: 1.69 ft at 12:15 PM EDT 27-May-2015. Flood Stage is 5 ft
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About this graph
Tabular Data (UTC)
Tabular Data (EDT)
XML Data
RSS Files
Datum: NGVD29
Metadata
NOTE: Forecasts for the Assabet River at Maynard are issued routinely year-round.
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Flood Categories (in feet)
Major Flood Stage: 7
Moderate Flood Stage: 6
Flood Stage: 5
Action Stage: 4.5
Low Stage (in feet): 0

Historic Crests
(1) 8.94 ft on 08/20/1955
(2) 8.15 ft on 03/19/1968
(3) 8.11 ft on 01/26/1979
(4) 7.17 ft on 04/07/1987
(5) 7.14 ft on 03/16/2010
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 5.17 ft on 06/15/2013
(2) 5.09 ft on 03/13/2011
(3) 5.56 ft on 03/08/2011
(4) 7.08 ft on 03/31/2010
(5) 5.44 ft on 03/24/2010
Show More Recent Crests

(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
7 Significant flooding will affect interests along the river in Maynard, Concord and Hudson. Roadways may become impassable due to flood waters and some properties may need to be evacuated. Follow the directions of local emergency management officials.
6 Flooding is likely in low lying sections along the river including portions of Maynard, Hudson and Concord. Water may approach homes along the river and may force several localized road closures.
5 Minor lowland and backyard flooding is likely along reaches of the river in Maynard, Concord as well as Hudson. Several river roads may also become covered in water.
About This Location Collapse

Latitude: 42.431944° N, Longitude: 71.450278° W, Horizontal Datum: NAD27

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 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 29 142.12 147.12 Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other NULL NULL  

Current/Historical Observations:

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Hydrologic Resources Additional Resources
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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.
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Page last modified: 12-Feb-2015 9:36 PM
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