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Hydrograph River at a Glance Download
Assabet River at Maynard Stage (ft)Flow (kcfs)Observed: 2.21 ft at 6:00PM Feb 23, 2015Observed: 2.22 ft at 6:15PM Feb 23, 2015Observed: 2.22 ft at 6:30PM Feb 23, 2015Observed: 2.23 ft at 6:45PM Feb 23, 2015Observed: 2.23 ft at 7:00PM Feb 23, 2015Observed: 2.24 ft at 7:15PM Feb 23, 2015Observed: 2.25 ft at 7:30PM Feb 23, 2015Observed: 2.25 ft at 7:45PM Feb 23, 2015Observed: 2.26 ft at 8:00PM Feb 23, 2015Observed: 2.28 ft at 8:15PM Feb 23, 2015Observed: 2.28 ft at 8:30PM Feb 23, 2015Observed: 2.29 ft at 8:45PM Feb 23, 2015Observed: 2.3 ft at 9:00PM Feb 23, 2015Observed: 2.31 ft at 9:15PM Feb 23, 2015Observed: 2.31 ft at 9:30PM Feb 23, 2015Observed: 2.31 ft at 9:45PM Feb 23, 2015Observed: 2.32 ft at 10:00PM Feb 23, 2015Observed: 2.33 ft at 10:15PM Feb 23, 2015Observed: 2.34 ft at 10:30PM Feb 23, 2015Observed: 2.35 ft at 10:45PM Feb 23, 2015Observed: 2.35 ft at 11:00PM Feb 23, 2015Observed: 2.36 ft at 11:15PM Feb 23, 2015Observed: 2.36 ft at 11:30PM Feb 23, 2015Observed: 2.37 ft at 11:45PM Feb 23, 2015Observed: 2.38 ft at 12:00AM Feb 24, 2015Observed: 2.4 ft at 12:15AM Feb 24, 2015Observed: 2.41 ft at 12:30AM Feb 24, 2015Observed: 2.42 ft at 12:45AM Feb 24, 2015Observed: 2.43 ft at 1:00AM Feb 24, 2015Observed: 2.44 ft at 1:15AM Feb 24, 2015Observed: 2.45 ft at 1:30AM Feb 24, 2015Observed: 2.46 ft at 1:45AM Feb 24, 2015Observed: 2.47 ft at 2:00AM Feb 24, 2015Observed: 2.48 ft at 2:15AM Feb 24, 2015Observed: 2.49 ft at 2:30AM Feb 24, 2015Observed: 2.5 ft at 2:45AM Feb 24, 2015Observed: 2.5 ft at 3:00AM Feb 24, 2015Observed: 2.51 ft at 3:15AM Feb 24, 2015Observed: 2.52 ft at 3:30AM Feb 24, 2015Observed: 2.53 ft at 3:45AM Feb 24, 2015Observed: 2.54 ft at 4:00AM Feb 24, 2015Observed: 2.54 ft at 4:15AM Feb 24, 2015Observed: 2.55 ft at 4:30AM Feb 24, 2015Observed: 2.55 ft at 4:45AM Feb 24, 2015Observed: 2.56 ft at 5:00AM Feb 24, 2015Observed: 2.56 ft at 5:15AM Feb 24, 2015Observed: 2.57 ft at 5:30AM Feb 24, 2015Observed: 2.58 ft at 5:45AM Feb 24, 2015Observed: 2.58 ft at 6:00AM Feb 24, 2015Observed: 2.59 ft at 6:15AM Feb 24, 2015Observed: 2.6 ft at 6:30AM Feb 24, 2015Observed: 2.6 ft at 6:45AM Feb 24, 2015Observed: 2.61 ft at 7:00AM Feb 24, 2015Observed: 2.61 ft at 7:15AM Feb 24, 2015Observed: 2.62 ft at 7:30AM Feb 24, 2015Highest Observation: 2.63 ft at 7:45AM Feb 24, 2015Highest Observation: 2.63 ft at 8:00AM Feb 24, 2015Highest Observation: 2.63 ft at 8:15AM Feb 24, 2015Highest Observation: 2.63 ft at 8:30AM Feb 24, 2015Observed: 2.62 ft at 8:45AM Feb 24, 2015Observed: 2.62 ft at 9:00AM Feb 24, 2015Observed: 2.61 ft at 9:15AM Feb 24, 2015Observed: 2.6 ft at 9:30AM Feb 24, 2015Observed: 2.59 ft at 9:45AM Feb 24, 2015Observed: 2.58 ft at 10:00AM Feb 24, 2015Observed: 2.58 ft at 10:15AM Feb 24, 2015Observed: 2.56 ft at 10:30AM Feb 24, 2015Observed: 2.54 ft at 10:45AM Feb 24, 2015Observed: 2.53 ft at 11:00AM Feb 24, 2015Observed: 2.51 ft at 11:15AM Feb 24, 2015Observed: 2.47 ft at 11:30AM Feb 24, 2015Observed: 2.44 ft at 11:45AM Feb 24, 2015Observed: 2.41 ft at 12:00PM Feb 24, 2015Observed: 2.36 ft at 12:15PM Feb 24, 2015Observed: 2.31 ft at 12:30PM Feb 24, 2015Observed: 2.27 ft at 12:45PM Feb 24, 2015Observed: 2.23 ft at 1:00PM Feb 24, 2015Observed: 2.19 ft at 1:15PM Feb 24, 2015Observed: 2.16 ft at 1:30PM Feb 24, 2015Observed: 2.15 ft at 1:45PM Feb 24, 2015Observed: 2.14 ft at 2:00PM Feb 24, 2015Observed: 2.13 ft at 2:15PM Feb 24, 2015Observed: 2.15 ft at 4:30PM Feb 24, 2015Observed: 2.16 ft at 4:45PM Feb 24, 2015Observed: 2.17 ft at 5:00PM Feb 24, 2015Observed: 2.17 ft at 5:15PM Feb 24, 2015Observed: 2.17 ft at 5:30PM Feb 24, 2015Observed: 2.18 ft at 5:45PM Feb 24, 2015Observed: 2.18 ft at 6:00PM Feb 24, 2015Observed: 2.18 ft at 6:15PM Feb 24, 2015Observed: 2.18 ft at 6:30PM Feb 24, 2015Observed: 2.18 ft at 6:45PM Feb 24, 2015Observed: 2.18 ft at 7:00PM Feb 24, 2015Observed: 2.18 ft at 7:15PM Feb 24, 2015Observed: 2.19 ft at 7:30PM Feb 24, 2015Observed: 2.18 ft at 7:45PM Feb 24, 2015Observed: 2.18 ft at 8:00PM Feb 24, 2015Observed: 2.18 ft at 8:15PM Feb 24, 2015Observed: 2.18 ft at 8:30PM Feb 24, 2015Observed: 2.18 ft at 8:45PM Feb 24, 2015Observed: 2.18 ft at 9:00PM Feb 24, 2015Observed: 2.18 ft at 9:15PM Feb 24, 2015Observed: 2.18 ft at 9:30PM Feb 24, 2015Observed: 2.17 ft at 9:45PM Feb 24, 2015Observed: 2.17 ft at 10:00PM Feb 24, 2015Observed: 2.17 ft at 10:15PM Feb 24, 2015Observed: 2.17 ft at 10:30PM Feb 24, 2015Observed: 2.17 ft at 10:45PM Feb 24, 2015Observed: 2.16 ft at 11:00PM Feb 24, 2015Observed: 2.16 ft at 11:15PM Feb 24, 2015Observed: 2.17 ft at 11:30PM Feb 24, 2015Observed: 2.17 ft at 11:45PM Feb 24, 2015Observed: 2.17 ft at 12:00AM Feb 25, 2015Observed: 2.16 ft at 12:15AM Feb 25, 2015Observed: 2.17 ft at 12:30AM Feb 25, 2015Observed: 2.17 ft at 12:45AM Feb 25, 2015Observed: 2.17 ft at 1:00AM Feb 25, 2015Observed: 2.18 ft at 1:15AM Feb 25, 2015Observed: 2.18 ft at 1:30AM Feb 25, 2015Observed: 2.18 ft at 1:45AM Feb 25, 2015Observed: 2.19 ft at 2:00AM Feb 25, 2015Observed: 2.19 ft at 2:15AM Feb 25, 2015Observed: 2.19 ft at 2:30AM Feb 25, 2015Observed: 2.2 ft at 2:45AM Feb 25, 2015Observed: 2.19 ft at 3:00AM Feb 25, 2015Observed: 2.19 ft at 3:15AM Feb 25, 2015Observed: 2.2 ft at 3:30AM Feb 25, 2015Observed: 2.2 ft at 3:45AM Feb 25, 2015Observed: 2.2 ft at 4:00AM Feb 25, 2015Observed: 2.21 ft at 4:15AM Feb 25, 2015Observed: 2.21 ft at 4:30AM Feb 25, 2015Observed: 2.21 ft at 4:45AM Feb 25, 2015Observed: 2.22 ft at 5:00AM Feb 25, 2015Observed: 2.22 ft at 5:15AM Feb 25, 2015Observed: 2.22 ft at 5:30AM Feb 25, 2015Observed: 2.22 ft at 5:45AM Feb 25, 2015Observed: 2.23 ft at 6:00AM Feb 25, 2015Observed: 2.23 ft at 6:15AM Feb 25, 2015Observed: 2.23 ft at 6:30AM Feb 25, 2015Observed: 2.23 ft at 6:45AM Feb 25, 2015Observed: 2.22 ft at 7:00AM Feb 25, 2015Observed: 2.22 ft at 7:15AM Feb 25, 2015Observed: 2.22 ft at 7:30AM Feb 25, 2015Observed: 2.22 ft at 7:45AM Feb 25, 2015Observed: 2.22 ft at 8:00AM Feb 25, 2015Observed: 2.22 ft at 8:15AM Feb 25, 2015Observed: 2.21 ft at 8:30AM Feb 25, 2015Observed: 2.21 ft at 8:45AM Feb 25, 2015Observed: 2.21 ft at 9:00AM Feb 25, 2015Observed: 2.2 ft at 9:15AM Feb 25, 2015Observed: 2.19 ft at 9:30AM Feb 25, 2015Observed: 2.18 ft at 9:45AM Feb 25, 2015Observed: 2.17 ft at 10:00AM Feb 25, 2015Observed: 2.17 ft at 10:15AM Feb 25, 2015Observed: 2.16 ft at 10:30AM Feb 25, 2015Observed: 2.16 ft at 10:45AM Feb 25, 2015Observed: 2.16 ft at 11:00AM Feb 25, 2015Observed: 2.16 ft at 11:15AM Feb 25, 2015Observed: 2.15 ft at 11:30AM Feb 25, 2015Observed: 2.15 ft at 11:45AM Feb 25, 2015Observed: 2.16 ft at 12:00PM Feb 25, 2015Observed: 2.16 ft at 12:15PM Feb 25, 2015Observed: 2.16 ft at 12:30PM Feb 25, 2015Observed: 2.17 ft at 12:45PM Feb 25, 2015Observed: 2.17 ft at 1:00PM Feb 25, 2015Observed: 2.18 ft at 1:15PM Feb 25, 2015Observed: 2.18 ft at 1:30PM Feb 25, 2015Observed: 2.18 ft at 1:45PM Feb 25, 2015Observed: 2.18 ft at 2:00PM Feb 25, 2015Observed: 2.19 ft at 2:15PM Feb 25, 2015Observed: 2.19 ft at 2:30PM Feb 25, 2015Observed: 2.19 ft at 2:45PM Feb 25, 2015Observed: 2.19 ft at 3:00PM Feb 25, 2015Observed: 2.19 ft at 3:15PM Feb 25, 2015Observed: 2.19 ft at 3:30PM Feb 25, 2015Observed: 2.2 ft at 3:45PM Feb 25, 2015Observed: 2.2 ft at 4:00PM Feb 25, 2015Observed: 2.2 ft at 4:15PM Feb 25, 2015Observed: 2.2 ft at 4:30PM Feb 25, 2015Observed: 2.2 ft at 4:45PM Feb 25, 2015Observed: 2.2 ft at 5:00PM Feb 25, 2015Observed: 2.2 ft at 5:15PM Feb 25, 2015Observed: 2.2 ft at 5:30PM Feb 25, 2015Observed: 2.2 ft at 5:45PM Feb 25, 2015Observed: 2.2 ft at 6:00PM Feb 25, 2015Observed: 2.2 ft at 6:15PM Feb 25, 2015Observed: 2.2 ft at 6:30PM Feb 25, 2015Observed: 2.2 ft at 6:45PM Feb 25, 2015Observed: 2.2 ft at 7:00PM Feb 25, 2015Observed: 2.2 ft at 7:15PM Feb 25, 2015Observed: 2.2 ft at 7:30PM Feb 25, 2015Observed: 2.2 ft at 7:45PM Feb 25, 2015Observed: 2.2 ft at 8:00PM Feb 25, 2015Observed: 2.2 ft at 8:15PM Feb 25, 2015Observed: 2.2 ft at 8:30PM Feb 25, 2015Observed: 2.2 ft at 8:45PM Feb 25, 2015Observed: 2.2 ft at 9:00PM Feb 25, 2015Observed: 2.2 ft at 9:15PM Feb 25, 2015Observed: 2.2 ft at 9:30PM Feb 25, 2015Observed: 2.2 ft at 9:45PM Feb 25, 2015Observed: 2.2 ft at 10:00PM Feb 25, 2015Observed: 2.19 ft at 10:15PM Feb 25, 2015Observed: 2.18 ft at 11:30PM Feb 25, 2015Observed: 2.18 ft at 11:45PM Feb 25, 2015Observed: 2.18 ft at 12:00AM Feb 26, 2015Observed: 2.19 ft at 12:15AM Feb 26, 2015Observed: 2.19 ft at 12:30AM Feb 26, 2015Observed: 2.18 ft at 12:45AM Feb 26, 2015Observed: 2.18 ft at 1:00AM Feb 26, 2015Observed: 2.18 ft at 1:15AM Feb 26, 2015Observed: 2.19 ft at 1:30AM Feb 26, 2015Observed: 2.18 ft at 1:45AM Feb 26, 2015Observed: 2.18 ft at 2:00AM Feb 26, 2015Observed: 2.18 ft at 2:15AM Feb 26, 2015Observed: 2.18 ft at 2:30AM Feb 26, 2015Observed: 2.18 ft at 2:45AM Feb 26, 2015Observed: 2.18 ft at 3:00AM Feb 26, 2015Observed: 2.18 ft at 3:15AM Feb 26, 2015Observed: 2.18 ft at 3:30AM Feb 26, 2015Observed: 2.18 ft at 3:45AM Feb 26, 2015Observed: 2.18 ft at 4:00AM Feb 26, 2015Observed: 2.18 ft at 4:15AM Feb 26, 2015Observed: 2.18 ft at 4:30AM Feb 26, 2015Observed: 2.18 ft at 4:45AM Feb 26, 2015Observed: 2.18 ft at 5:00AM Feb 26, 2015Observed: 2.18 ft at 5:15AM Feb 26, 2015Observed: 2.18 ft at 5:30AM Feb 26, 2015Observed: 2.18 ft at 5:45AM Feb 26, 2015Observed: 2.17 ft at 6:00AM Feb 26, 2015Observed: 2.17 ft at 6:15AM Feb 26, 2015Observed: 2.17 ft at 6:30AM Feb 26, 2015Observed: 2.17 ft at 6:45AM Feb 26, 2015Observed: 2.17 ft at 7:00AM Feb 26, 2015Observed: 2.17 ft at 7:15AM Feb 26, 2015Observed: 2.17 ft at 7:30AM Feb 26, 2015Observed: 2.17 ft at 7:45AM Feb 26, 2015Observed: 2.17 ft at 8:00AM Feb 26, 2015Observed: 2.17 ft at 8:15AM Feb 26, 2015Observed: 2.17 ft at 8:30AM Feb 26, 2015Observed: 2.17 ft at 8:45AM Feb 26, 2015Observed: 2.17 ft at 9:00AM Feb 26, 2015Observed: 2.17 ft at 9:15AM Feb 26, 2015Observed: 2.17 ft at 9:30AM Feb 26, 2015Observed: 2.17 ft at 9:45AM Feb 26, 2015Observed: 2.18 ft at 10:00AM Feb 26, 2015Observed: 2.17 ft at 10:15AM Feb 26, 2015Observed: 2.17 ft at 10:30AM Feb 26, 2015Observed: 2.17 ft at 10:45AM Feb 26, 2015Observed: 2.17 ft at 11:00AM Feb 26, 2015Observed: 2.17 ft at 11:15AM Feb 26, 2015Observed: 2.17 ft at 11:30AM Feb 26, 2015Observed: 2.17 ft at 11:45AM Feb 26, 2015Observed: 2.17 ft at 12:00PM Feb 26, 2015Observed: 2.17 ft at 12:15PM Feb 26, 2015Observed: 2.17 ft at 12:30PM Feb 26, 2015Observed: 2.17 ft at 12:45PM Feb 26, 2015Observed: 2.17 ft at 1:00PM Feb 26, 2015Observed: 2.17 ft at 1:15PM Feb 26, 2015Observed: 2.17 ft at 1:30PM Feb 26, 2015Observed: 2.17 ft at 1:45PM Feb 26, 2015Observed: 2.17 ft at 2:00PM Feb 26, 2015Observed: 2.17 ft at 2:15PM Feb 26, 2015Observed: 2.17 ft at 2:30PM Feb 26, 2015Observed: 2.17 ft at 2:45PM Feb 26, 2015Observed: 2.17 ft at 3:00PM Feb 26, 2015Observed: 2.17 ft at 3:15PM Feb 26, 2015Observed: 2.17 ft at 3:30PM Feb 26, 2015Observed: 2.17 ft at 3:45PM Feb 26, 2015Observed: 2.17 ft at 4:00PM Feb 26, 2015Observed: 2.17 ft at 4:15PM Feb 26, 2015Highest Forecast: 1.7 ft 7:00PM Feb 26, 2015Highest Forecast: 1.7 ft 1:00AM Feb 27, 2015Highest Forecast: 1.7 ft 7:00AM Feb 27, 2015Highest Forecast: 1.7 ft 1:00PM Feb 27, 2015Highest Forecast: 1.7 ft 7:00PM Feb 27, 2015Highest Forecast: 1.7 ft 1:00AM Feb 28, 2015Highest Forecast: 1.7 ft 7:00AM Feb 28, 2015Highest Forecast: 1.7 ft 1:00PM Feb 28, 2015Highest Forecast: 1.7 ft 7:00PM Feb 28, 2015Highest Forecast: 1.7 ft 1:00AM Mar 01, 2015Highest Forecast: 1.7 ft 7:00AM Mar 01, 2015USGS--Water Resources of the United StatesMAYM3(plotting HGIRG) Graph Created (5:45PM Feb 26, 2015)ObservedForecast (issued 10:50AM Feb 26)Latest observed value: 2.17 ft at 4:15 PM EST 26-Feb-2015. Flood Stage is 5 ft
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About this graph
Tabular Data (UTC)
Tabular Data (EST)
XML Data
RSS Files
Datum: NGVD29
Metadata
NOTE: Gauge reading may be affected by ice. Forecast flows are unadjusted for ice.

NOTE: Forecasts for the Assabet River at Maynard are issued routinely year-round.

Return to Area Map
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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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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