Warning: Javascript must be enabled to use all the features on this page!

Page Loading - Please Wait...

* We've detected you're using a mobile device. Find our mobile dedicated web site here.
Click to hideNews Bulletins
  • Due to a lapse in appropriations, the majority of USGS websites may not be up to date and may not reflect current conditions. Websites displaying real-time data, such as Earthquake and Water and information needed for public health and safety will be updated with limited support. Additionally, USGS will not be able to respond to inquiries until appropriations are enacted. For more information, please see www.doi.gov/shutdown.

  • Please see news on new formats
  • Full News RSS icon

USGS 05020500 St. Mary River at International Boundary

  Stream Site

Latitude 49°00'41.07",   Longitude 113°17'58.37"   NAD83
000, 95,
Drainage area: 462 square miles
Datum of gage: 4,116.04 feet above   NGVD29.
Data Type Begin Date End Date Count
 Current / Historical Observations     (availability statement)    1989-10-01  2019-01-17  
 Daily Data
    Discharge, cubic feet per second  1902-09-01  2019-01-15  42505 
 Daily Statistics 
    Discharge, cubic feet per second  1902-09-01  2018-01-01 42127 
 Monthly Statistics 
    Discharge, cubic feet per second  1902-09  2018-01  
 Annual Statistics 
    Discharge, cubic feet per second  1902  2018  
 Peak streamflow 1903-06-08  2017-06-06  113 
 Field measurements 1975-10-01  2018-10-30  803 
 Field/Lab water-quality samples 1977-12-28  2013-08-28  378 
 Water-Year Summary 2006  2017  12 
 Revisions  Loading...
Record for this site is maintained by the USGS Montana Water Science Center
Email questions about this site to Montana Water Science Center Water-Data Inquiries