Current Data from Intensive Monitoring Streams
Maps, graphs and charts can be viewed by selecting a stream (above) or by visiting the Data Availability Tables for
Duluth Area streams,
North Shore streams, or
South Shore streams.
Datalogger Status (as of September 17, 2012):
The Amity, Kingsbury, and Tischer Creek sensors are collecting data.
Cell communications have been restored at Amity Creek.
The Kingsbury and Tischer data are downloaded manually every week.
The Chester Creek sensors have been removed because there is insufficient water in the stream.
The Duluth Lift Bridge sensors ARE working.
Automated Stream Data Notes:
Jul 2008 - Dec 2008
Jan 2009 - Oct 2009
Nov 2009 - Jun 2010
Jul 2010 - Dec 2010
Jan 2011 - Sep 2011
Options for Viewing Current Data
1. Animated graphs of stream monitoring unit data
can be viewed and manipulated with the Data Visualization
2. Data collected with stream monitoring units including
temperature, turbidity, electrical conductivity
and water depth (Real Time Data) is available
in both HTML tables and Excel tables.
3. Water Chemistry Data for water
samples collected periodically by DuluthStreams
staff including nitrogen, phosphorus, pH, and more
is available in Excel tables.
4. Real time data viewed in Excel can be easily
graphed using a simple Excel graphing utility.
(choose real time data, then choose Excel format)
The 2002-2005 data posted has now undergone QA/QC review.
Real time data sensors
can, and do, at times produce unexplainable and erroneous
data, and periods of missing data. In addition,
calibration periods are also captured in the data
stream. This data has been removed or adjusted according
to the QA/QC protocol.
Explainable data problems encountered included:
missing data due to transmission problems, erroneous
depth readings due to blocked vent tubes, turbidity
spikes due to the mechanical sensor wiper malfunctioning,
increasing turbidity baseline values due to sensor
fouling, and captured calibration periods.