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Location.--Latitude 46°16'35", Longitude 122°09'41", in NE 1/4 NE 1/4 Section 10, Township 9 North, Range 5 East, in Skamania County, Hydrologic Unit 17080005, Mount St. Helens National Volcanic Monument, at entrance of Spirit Lake Outlet Tunnel, 5.6 miles north-northeast of Mount St. Helens volcanic edifice, and at river mile undetermined. Drainage area is 18.0 mi2, at entrance to Spirit Lake Outlet Tunnel. Prior to the volcanic eruption on May 18, 1980, 14.9 mi2. Datum of gage is 3,400 feet above NGVD of 1929, data published to NGVD of 1929.
Maps.--Locate this station on a map of the basin (PDF).
Additional Data and Information.--Station data inventory, annual data report, information, and history.
Cooperation.--Funds for the operation of the gage and telemetry equipment, and production of the data are provided by Cascades Volcano Observatory.
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Station Notes
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Lake elevation varies from minimum recorded elevation of 3,437.00 feet on October 28, 1997 to maximum recorded elevation of 3,460.13 feet on February 5, 1997. |
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An additional sensor has been installed and reflects the lake elevation at the intake gate. |
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This station managed by the Vancouver Office.
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U.S. Department of the Interior |
U.S. Geological Survey
