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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 user interface only serves WQX2.2 profiles, which do NOT contain USGS data added after March 11, 2024.

WQP Home >  Providers >  STORET >  CORIVWCH_WQX >  CORIVWCH_WQX-688

Leyden Cr - Leyden@Ralston (CORIVWCH_WQX-688) site data in the Water Quality Portal

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

This river/stream site, maintained by the Colorado River Watch (Volunteer) (identifier CORIVWCH_WQX), has the name "Leyden Cr - Leyden@Ralston" and has the identifier CORIVWCH_WQX-688. This site is in the watershed defined by the 8 digit Hydrologic Unit Code (HUC)10190004.

This site is located in Jefferson County County, Colorado at 39.8240000000 degrees latitude and -105.1266000000 degrees longitude using the datum NAD83. No horizontal location accuracy metadata is available. This site is at an elevation of 5423 ft No vertical location accuracy metadata is available.

To download the metadata about this site along with water quality data, go to the Portal Page and enter "CORIVWCH_WQX-688" 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*
Biological, Counts 2000 - 2000
Information 2000 - 2000
Inorganics, Major, Metals 2000 - 2002
Inorganics, Major, Non-metals 2000 - 2003
Inorganics, Minor, Metals 1997 - 2002
Inorganics, Minor, Non-metals 2000 - 2002
Not Assigned 2000 - 2000
Nutrient 2000 - 2003
Physical 1997 - 2003
Physical, Habitat 2000 - 2000
*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 CORIVWCH_WQX
OrganizationFormalName Colorado River Watch (Volunteer)
MonitoringLocationIdentifier CORIVWCH_WQX-688
MonitoringLocationName Leyden Cr - Leyden@Ralston
MonitoringLocationTypeName River/Stream
MonitoringLocationDescriptionText From junction of I-70 and state hwy 72 (Ward Rd) in Denver Metro area, travel 2.3 mi north on Ward to Ralston Rd. Turn right and continue 1/2 mi to Simms St, turn left and proceed 2/3 mi to north bank of Ralston Cr. Walk east along creek to confluence with Leyden Cr; station is on Leyden Cr just above confluence.
HUCEightDigitCode 10190004
LatitudeMeasure 39.8240000000
LongitudeMeasure -105.1266000000
SourceMapScaleNumeric 160000
HorizontalCollectionMethodName Interpolation-Map
HorizontalCoordinateReferenceSystemDatumName NAD83
VerticalMeasure/MeasureValue 5423
VerticalMeasure/MeasureUnitCode ft
VerticalCollectionMethodName Topographic Map Interpolation
VerticalCoordinateReferenceSystemDatumName SEALV
CountryCode US
StateCode 08
CountyCode 059
ProviderName STORET