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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-CO >  USGS-394911105145900

RALSTON RESERVOIR DUP1 (USGS-394911105145900) site data in the Water Quality Portal

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

This lake, reservoir, impoundment site, maintained by the USGS Colorado Water Science Center (identifier USGS-CO), has the name "RALSTON RESERVOIR DUP1" and has the identifier USGS-394911105145900. This site is in the watershed defined by the 8 digit Hydrologic Unit Code (HUC)10190004. See more details of this site the the USGS NWIS Web page for this site.

This site is located in Jefferson County County, Colorado at 39.81970918000000 degrees latitude and -105.2502672000000 degrees longitude using the datum NAD83. The horizontal location collection method was "Interpolated from MAP." and the accuracy is 1 minutes.

To download the metadata about this site along with water quality data, go to the Portal Page and enter "USGS-394911105145900" 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 1973 - 1973
Physical 1973 - 1973
*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-CO
OrganizationFormalName USGS Colorado Water Science Center
MonitoringLocationIdentifier USGS-394911105145900
MonitoringLocationName RALSTON RESERVOIR DUP1
MonitoringLocationTypeName Lake, Reservoir, Impoundment
HUCEightDigitCode 10190004
LatitudeMeasure 39.81970918000000
LongitudeMeasure -105.2502672000000
HorizontalAccuracyMeasure/MeasureValue 1
HorizontalAccuracyMeasure/MeasureUnitCode minutes
HorizontalCollectionMethodName Interpolated from MAP.
HorizontalCoordinateReferenceSystemDatumName NAD83
CountryCode US
StateCode 08
CountyCode 059
ProviderName NWIS