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Important for you to know:

  • New to WDFN: see current water conditions throughout the state using the new State Pages. Filter by continuous data type and age of data, view latest values, and link to graphing options to explore the data further. To learn more, read our announcement on the Water Data for the Nation blog.
Important Legacy real-time page

USGS Parameter Group Data Types Start Date End Date
Inorganics, Major, Metals Water-quality 1969-07-07 1971-04-12
Inorganics, Major, Non-metals Water-quality 1969-07-07 1971-06-07
Inorganics, Minor, Non-metals Water-quality 1969-07-07 1971-04-12
Inorganics, Minor, metals Water-quality 1969-07-07 1971-04-12
Microbiological Water-quality 1969-07-07 1971-06-07
Nutrient Water-quality 1969-07-07 1971-06-07
Organics, other Water-quality 1969-08-11 1971-06-07
Physical Daily Values, Unit Values, Water-quality 1909-04-06 2024-11-21
n/a USGS Annual Water Data Reports Site 2006-01-01 2024-01-01
Water Data for the Nation inventory

Monitoring location 12371550 is associated with a Lake, Reservoir, Impoundment in Lake County, Montana. Current conditions of Elevation of reservoir water surface above datum are available. Water data back to 1909 are available online.

Metadata Element Location Metadata Metadata Code
Agency
U.S. Geological Survey USGS
Site identification number
12371550 n/a
Site name
Flathead Lake at Polson MT n/a
Site type
Lake, Reservoir, Impoundment
LK
DMS latitude 474148.87 n/a
DMS longitude 1140940.67 n/a
Decimal latitude 47.6969083 n/a
Decimal longitude -114.1612972 n/a
Latitude-longitude method
Interpolated from Digital MAP. N
Latitude-longitude accuracy
Accurate to + or - .1 sec (Differentially-Corrected GPS). 1
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
Lake County 047
Country US n/a
Land net location description SWSENES04 T22N R20W P n/a
Name of location map POLSON n/a
Scale of location map n/a
Altitude of Gage/land surface 2878.0 feet n/a
Method altitude determined Level or other surveyed method. L
Altitude accuracy .1 feet n/a
Altitude datum
Local Mean Sea Level LMSL
Subbasin hydrologic unit
17010208
Drainage basin
n/a
Topographic setting
n/a
Flags for instruments at site NNNNYNNNNNNNNNNNNNNNNNNNNNNNNN n/a
Date of first construction
n/a
Date site established or inventoried n/a
Drainage area
7086 square miles n/a
Contributing drainage area n/a
Time Zone abbreviation MST n/a
Site honors Daylight Saving Time
Y n/a
Data reliability
n/a
Data-other GW files NYNNNNNN 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 n/a

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