Data Courtesy of U.S. Army Corps of Engineers, NWD

Hourly Water Quality Queries

Select River Variable, Year, Site

Barometric Pressure (mmHg) Dissolved Gas (mmHg) Dissolved Gas Percent (%) Outflow (kcfs) Spill (kcfs) Spill Proportion Temperature (C) Temperature (F) 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 ANQW-Anatone (Snake R) [1999] BON-Bonneville Forebay CIBW-Boundary (Columbia R US/Canada) [1997] * CWMW-Camas/Washougal (Downstream from BON) CCIW-Cascade Island (Bonneville Tailwater) [2004] * CHJ-Chief Joseph Forebay CHQW-Chief Joseph Tailwater [1997] DWQI-Dworshak Tailwater * FDRW-Grand Coulee Forebay * GCGW-Grand Coulee Downstream (6 miles) [1997] * HGHM-Hungry Horse Downstream [1998] IHR-Ice Harbor Forebay IDSW-Ice Harbor Tailwater * JDA/JDY-John Day Forebay JHAW-John Day Tailwater * LEWI-Lewiston (Clearwater R) [1997] LIBM/LBQM-Libby Downstream (Kootenay R) LGS-Little Goose Forebay LGSW-Little Goose Tailwater * LWG-Lower Granite Forebay LGNW-Lower Granite Tailwater * LMN-Lower Monumental Forebay LMNW-Lower Monumental Tailwater * MCQW-McNary Forebay (Washington) MCQO-McNary Forebay (Oregon) [1996-2006] MCPW-McNary Tailwater (Washington) * PAQW-Pasco WA (Columbia R) [2000] PEKI-Peck ID (Clearwater R) [1997] PRD-Priest Rapids Forebay * PRXW-Priest Rapids Downstream * RIS-Rock Island Forebay RIGW-Rock Island Tailwater [1997] RRH-Rocky Reach Forebay RRDW-Rocky Reach Tailwater [1997] SKAW-Skamania (Downstream from BON) [1995-2002] TDA-The Dalles Forebay TDDO-The Dalles Downstream (1 mile) [1997] * WAN-Wanapum Forebay * WANW-Wanapum Downstream * WRNO-Warrendale (BON Downstream 6 miles) [1996] WEL-Wells Forebay WELW-Wells Downstream [1998]

The year following the site indicates earliest data available.
An asterisk * indicates a year-round data collection site; all other sites operate during the spill season.

Set Date and Hours

Start mm/dd Hours 24 Hours (1 day) 48 Hours (2 days) 72 Hours (3 days) 96 Hours (4 days) 120 Hours (5 days) 144 Hours (6 days) 168 Hours (7 days) 14 Days (336 hours) 30 Days (720 hours) 90 Days (2160 hours) 365 Days (8760 hours)

Notes on the DART Hourly Water Quality Dataset

USACE Data Disclaimer: These data are furnished with the understanding that the Corps of Engineers makes no warranties concerning the accuracy, reliability, or suitability of the data for any particular purpose.

Outflow and Spill data are collected at the project (dam). Barometric Pressure, Dissolved Gas, Dissolved Gas Percent, and Temperature (F) are measured at Water Quality Monitoring stations in the forebay and tailwater of most projects and other key locations in the basin. Current monitoring station details (including river mile and lat/lon coordinates) can be found on the Total Dissolved Gas (TDG) Monitoring Station Summary Data Sheet, USACE Columbia Basin Water Management Division.

The USACE initially reported incorrect hourly Bonneville spillway discharge for 2002-2004. As of 18 July 2006, DART is reporting the USACE's Recalibrated Spillway Discharge at Bonneville for this period. The Water Quality reports for BON, CWMW, CCIW, and WRNO include the recalibrated spill at Bonneville.