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New WQX 3.0 profiles are available at waterqualitydata.us/beta/. These profiles will contain recent USGS data added since March 11, 2024, which marks the beginning of limited accessibility for USGS data. Read more about the 3.0 profiles and associated changes here.

This legacy user interface will continue to function for several weeks. However, this user interface only serves WQX2.2 profiles, which do NOT contain USGS data added after March 11, 2024.

WQP Home >  Providers >  NWIS >  USGS-MN >  USGS-464546092070701

G31 St. Louis Bay Above Blatnik Bridge At Duluth, (USGS-464546092070701) site data in the Water Quality Portal

Data Provider: NWIS (Learn more about Water Quality Portal Data Providers)

This estuary site, maintained by the USGS Minnesota Water Science Center (identifier USGS-MN), has the name "G31 St. Louis Bay Above Blatnik Bridge At Duluth," and has the identifier USGS-464546092070701. This site is in the watershed defined by the 8 digit Hydrologic Unit Code (HUC)04010201. See more details of this site the the USGS NWIS Web page for this site.

This site is located in St. Louis County County, Minnesota at 46.76291667000000 degrees latitude and -92.1187472000000 degrees longitude using the datum NAD83. The horizontal location collection method was "Interpolated from Digital MAP." and the accuracy is .5 seconds. The source map scale is 1:24000. This site is at an elevation of 586.25 feet and the accuracy of the elevation measurement, collected using the method "Level or other surveyed method." is 2 feet. The vertical coordinate reference system is IGLD.

To download the metadata about this site along with water quality data, go to the Portal Page and enter "USGS-464546092070701" into the "Site ID" box under Site Parameters

What other monitoring locations are upstream or downstream from this one?

Upstream and downstream locations

This map shows all Water Quality Portal stations that are 10 miles upstream (dashed dark blue) and 10 miles downstream (solid light blue) of this monitoring location (indicated by the large blue circle). The upstream and downstream functionality is provided by the Network Linked Data Index.

When were data collected at this location?

Periods of record for data characteristic groups

For a more detailed breakdown of data, go to the Monitoring Report at the EPA How's My Waterway Application
Characteristic Group Date Range*
Information 2015 - 2015
Physical 2015 - 2015
*Date ranges may contain gap years

What other information is available for this location?

Detailed Metadata

For the definitions of the metadata elements, please go to the Water Quality Portal user guide

Location Metadata Value
OrganizationIdentifier USGS-MN
OrganizationFormalName USGS Minnesota Water Science Center
MonitoringLocationIdentifier USGS-464546092070701
MonitoringLocationName G31 St. Louis Bay Above Blatnik Bridge At Duluth,
MonitoringLocationTypeName Estuary
HUCEightDigitCode 04010201
LatitudeMeasure 46.76291667000000
LongitudeMeasure -92.1187472000000
SourceMapScaleNumeric 24000
HorizontalAccuracyMeasure/MeasureValue .5
HorizontalAccuracyMeasure/MeasureUnitCode seconds
HorizontalCollectionMethodName Interpolated from Digital MAP.
HorizontalCoordinateReferenceSystemDatumName NAD83
VerticalMeasure/MeasureValue 586.25
VerticalMeasure/MeasureUnitCode feet
VerticalAccuracyMeasure/MeasureValue 2
VerticalAccuracyMeasure/MeasureUnitCode feet
VerticalCollectionMethodName Level or other surveyed method.
VerticalCoordinateReferenceSystemDatumName IGLD
CountryCode US
StateCode 27
CountyCode 137
ProviderName NWIS