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ICE EFFECTS ON STREAMFLOW During winter, ice formation may cause stage and discharge values to appear higher than expected. Ice effects may be minor (occurring only at night and early morning) with baseline flows obvious, or the effects may be major (stage constantly increases over several days or weeks) resulting in greatly erroneous discharge. Streamgages experiencing minor ice conditions will continue to display stage and discharge values to enable users to estimate the approximate base-line stage and discharge. Streamgages experiencing major ice conditions will have the discharge record temporarily disabled to prevent use of erroneous discharge values. The discharge record will resume when it is determined that ice conditions are no longer present. Daily mean discharges during periods of ice effect will be estimated after detailed data analysis.

USGS 01104430 HOBBS BK BELOW CAMBRIDGE RES NR KENDALL GREEN, MA

PROVISIONAL DATA SUBJECT TO REVISION

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LOCATION--Middlesex County, Hydrologic Unit 01090001, on right bank, 50 ft downstream of culvert at Winter Street, 300 ft downstream of gate house outlet from Cambridge Reservoir, and 1.3 mi north of Kendal Green.
DRAINAGE AREA--6.86 mi2.
PERIOD OF RECORD--July 1997 to current year.
GAGE--Data Collection Platform, water-temperature and specific conductance monitor, air temperature monitor, and a heated tipping-bucket precipitation gage equipped with a wind shield. Elevation of gage is 150 ft above sea level (from topographic map). Telephone telemeter at station. Datum of gage is referenced to the City of Cambridge datum, subtract 10.84 feet to elevations to adjust to National Geodetic Vertical Datum of 1929. Dissolved chloride and sodium concentrations estimated from specific conductance measurements using the regression technique described in Smith 2013.
REMARKS--Flow affected by regulation of dam 300 ft upstream at outflow of Cambridge Reservoir.
COOPERATION BY--Cambridge Water Department

Daily and unit values precipitation data are calibrated and quality assured prior to publication by the Massachusetts-Rhode Island Water Science Center. Data are available upon request.

Photo of Hobbs Brook Streamflow and Precipitation Gages

Available Parameters Available Period
All 15 Available Parameters for this site
  
00010 Temperature, water 2007-10-01  2017-05-25
00010 Temperature, water, GATE HOUSE 2015-09-09  2017-05-25
00020 Temperature, air 2007-10-01  2017-05-25
00045 Precipitation 2007-10-01  2017-05-25
00060 Discharge 1997-07-14  2017-05-25
00062 Elevation, reservoir, GATE HOUSE 2007-10-01  2017-05-25
00065 Gage height 2007-10-01  2017-05-25
00095 Specific cond at 25C 2007-10-01  2017-05-25
00095 Specific cond at 25C, GATE HOUSE 2015-09-09  2017-05-25
00300 Dissolved oxygen, GATE HOUSE 2015-09-09  2017-05-25
62361 Chlorophyll, in situ, GATE HOUSE 2015-09-09  2017-05-25
63680 Turbidity, Form Neph, GATE HOUSE 2015-09-09  2017-05-25
72022 Reservoir storage, GATE HOUSE 2007-10-01  2017-05-25
99398 Sodium, wf, estim. 2012-05-17  2017-05-25
99404 Chloride, wf, estim 2009-10-23  2017-05-25

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Summary of all available data for this site
Instantaneous-data availability statement


Discharge, cubic feet per second

Most recent instantaneous value: 1.34 05-25-2017   10:30 EDT
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Daily discharge, cubic feet per second -- statistics for May 25 based on 19 years of record more
Min
(2001)
Most Recent
Instantaneous
Value May 25
25th
percen-
tile
Median Mean 75th
percen-
tile
Max
(2006)
0.85 1.34 2.3 5.7 8.3 13 25.9


Gage height, feet

Most recent instantaneous value: 0.28 05-25-2017   10:30 EDT
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