Ives Island Water Level, Bonneville Dam Flows

and Tailwater Graph




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NOTES:

  • Gauge 1 is found at: Lat 45°37'36.24", Long 121°59'09.13", near the upriver terminus of the channel on the north side of Ives Island.  The elevation of this gauge is 13.27 ft.  (Lat. and Long. Datum is NAD 83, error +/- 22 ft for both gauge locations.The gage is 0.2 feet under the substrate and at the same elevation as the hydraulic control between Ives Island and Hamilton Island. Thus if the gage reads 1.0 feet there will be one foot of water over the control at the thawleg.  The vertical datum used to calculate mean sea level for both gauges is NAVD88). 
    Ives Gauge #1 is missing data from 5/25/01 to 6/26/01 and from 09/10 to 10/10.  Ives Gauge #1 is missing date from 11/29/01 to 01/23/02.
  • The Bonneville flow and tailwater elevation data is updated every hour, the water elevation data at Ives Island is updated every two hours, the Vancouver stage Gauge data is updated every hour.
  • These data are downloaded directly from three sources: a USGS stage gauge near Vancouver, WA, a USFWS temperature and elevation gauge near Ives Island, and from a USACE ftp site where Bonneville Dam flow and elevation data is stored. Occasionally, these gauges will experience technical difficulties which may result in missing data.  Please be assured this is generally the problem if records are missing and the FPC is aware of the problem and will update the files as soon as the stations are operational. Don't hesitate to contact FPC data staff if you have any questions or concerns.
  • The data on the graph is posted in 3-hour increments.
  • NOTE - In the event that data is not available from the Ives Gauge, there is a graph with the Bonneville Flow and Tailwater for the past 7 days only in the list above.
  • NOTE - For Additional information regarding the Ives Island Gauge go to the FAQ page.



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Page last updated on: March 26, 2013

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