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Important for you to know:

  • New to WDFN: see current water conditions throughout the state using the new State Pages. Visit the Louisiana page for an example. Filter by continuous data type and age of data, view latest values, and link to graphing options to explore the data further. You can update the state name in the URL to visit your State Page or read our announcement on the Water Data for the Nation blog to find links to all the state and territory pages.
Important Inventory Page

USGS Parameter Group Data Types Start Date End Date
Biological Water-quality 2022-05-26 2022-09-20
Information Water-quality 2022-05-26 2022-09-20
Inorganics, Major, Non-metals Water-quality 2022-05-26 2022-09-20
Inorganics, Minor, Non-metals Water-quality 2022-05-26 2022-09-20
Inorganics, Minor, metals Water-quality 2022-05-26 2022-09-20
Nutrient Water-quality 2022-05-26 2022-09-20
Physical Water-quality 2022-05-26 2022-09-20
Water Data for the Nation inventory

Monitoring location 481430109563601 is associated with a Lake, Reservoir, Impoundment in Chouteau County, Montana. Water data back to 2022 are available online.

Metadata Element Location Metadata Metadata Code
Agency
U.S. Geological Survey USGS
Site identification number
481430109563601 n/a
Site name
Williamson Reservoir site WR01, near Box Elder, MT n/a
Site type
Lake, Reservoir, Impoundment
LK
DMS latitude 481430.26 n/a
DMS longitude 1095635.88 n/a
Decimal latitude 48.24173889 n/a
Decimal longitude -109.9433 n/a
Latitude-longitude method
Mapping grade GPS unit (handheld accuracy range 12 to 40 ft) G
Latitude-longitude accuracy
Accurate to + or - .5 sec (PLGR/PPS GPS). 5
Latitude-longitude datum
North American Datum of 1983 NAD83
Decimal Latitude-longitude datum North American Datum of 1983 NAD83
District
Montana 30
State
Montana 30
County
Chouteau County 015
Country US n/a
Land net location description SWSWNES29 T29N R14E M n/a
Name of location map TABLE BUTTE n/a
Scale of location map 24000 n/a
Altitude of Gage/land surface 3033 feet n/a
Method altitude determined Interpolated from Digital Elevation Model N
Altitude accuracy 10 feet n/a
Altitude datum
North American Vertical Datum of 1988 NAVD88
Subbasin hydrologic unit
10050005
Drainage basin
n/a
Topographic setting
n/a
Flags for instruments at site n/a
Date of first construction
n/a
Date site established or inventoried 20220526 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
Data reliability
Data have been checked by the reporting agency. C
Data-other GW files 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
Project number UMDLS00 n/a