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Scheduled Maintenance Notice
USGS will be performing maintenance on the time series data processing system beginning at 09:00 EDT on September 10, 2026. During this period, delivery of the latest time series data will be delayed. The maintenance is expected to finish within 2 hours, after which all backlogged time series data will be processed and delivered to WDFN web portals and APIs.

Available data

Select data types to graph from categories based on the way the data were collected.

1 data types available - data from 1994-03-17 to 1996-09-19

1 data types available - data from 1994-03-16 to 1996-09-29

2 data types available - data from 1994-01-18 to 1996-10-01

6 Observed properties (data types) available - with data from 1996-02-23 to 1996-06-14

6 Sampling activities

1 data types available - data from 1994-03-16 to 1996-09-29

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Metadata Element	Location Metadata	Metadata Code
Agency	U.S. Geological Survey	USGS
Location identification number	395403105104700	n/a
Location name	WALNUT CR. BELOW POND A-4 AT ROCKY FLATS PLANT	n/a
Site type	Stream	ST
Decimal latitude (WGS84)	39.9013749290289	n/a
Decimal longitude (WGS84)	-105.179987027405	n/a
Latitude-longitude method	Interpolated from map	M
Latitude-longitude accuracy	Accurate to + or - 1 sec.	S
District	Colorado	08
State	Colorado	08
County	Jefferson County	059
Country	United States of America	n/a
Altitude of gage/land surface		n/a
Method altitude determined		n/a
Altitude accuracy		n/a
Altitude datum		n/a
Subbasin hydrologic unit	Middle South Platte-Cherry Creek	10190003
Drainage basin	06	n/a
Date of first construction		n/a
Drainage area		n/a
Contributing drainage area		n/a
Time zone abbreviation	MST	n/a
Site honors Daylight Saving Time	Y	n/a
National aquifer		n/a
Local aquifer		n/a
Local aquifer type		n/a
Well depth		n/a
Hole depth		n/a
Source of depth data		n/a