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Provisional Data Disclaimer

Real-time Streamflow and Reservoir Data

Data from realtime streamflow gages are relayed to the District's office through the NOAA Geostationary Operational Environmental Satellite (GOES) Data Collection System (DCS). Data are transmitted from each station at intervals between 1 and 4 hours, and are processed into the Washington Science Center computer system and made available on NWISWeb.

Realtime streamflow data available on the District Home Pages are PROVISIONAL data that have not been thoroughly reviewed. These data may be subject to significant change and are not citeable until reviewed and approved by the U.S. Geological Survey. streamflow data may be changed after review because the stage-discharge relationship may have been affected by:

• backwater from ice or debris such as log jams
• algal and aquatic growth in the stream
• sediment movement
• malfunction of recording equipment

Data are reviewed periodically to ensure accuracy. Each station record is considered PROVISIONAL until the data are published. The data are usually published within six to eight months from the end of the water year.

Data users are cautioned to consider carefully the provisional nature of the information before using it for decisions that concern personal or public safety or the conduct of business that involves substantial monetary or operational consequences.

Information concerning the accuracy and appropriate uses of these data or concerning other hydrologic data may be obtained by contacting the individual(s) listed on the data page.

Ground Water Data

All information in the NWISWeb Database is provisional and subject to revision. The data has been collected and entered for a wide variety of projects and purposes over a long period of time and the resulting database varies in quality and detail. The data represents a combination of measured (by USGS personnel) and reported information. Although many wells have accurate information (especially those field visited for use in recent projects), some problems are known to exist for older entries.

Examples of known problems include, but are not limited to, inaccurate well locations, old information regarding the use of water from the well, and incorrect installation dates. Many wells in the database have not been field visited, but were entered into the database from well drillers' reports, using general location information supplied by the drillers. Many other Federal, State, and local agencies use the same well-numbering system that is used in this database; consistency of assigned well numbers between agency databases should not be assumed.

This database does not represent all the wells in Washington State.

Please let us know if you have any questions.