DART River Environment Metadata & Glossary

River Environment Metadata

Abbrev Project/Water Quality Monitor Name1 2 River Primary Data Source
ALF Albeni Falls Forebay Pend Oreille U.S. Army Corps of Engineers
ANQW Anatone WA Snake U.S. Army Corps of Engineers
BON Bonneville Forebay Columbia U.S. Army Corps of Engineers
CCIW Cascade Island (below BON) Columbia U.S. Army Corps of Engineers
CIBW Boundary (US/Canada) Columbia U.S. Army Corps of Engineers
CHJ Chief Joseph Forebay Columbia U.S. Army Corps of Engineers
CHQW Chief Joseph Tailrace Columbia U.S. Army Corps of Engineers
CWMW Camas/Washougal WA Columbia U.S. Army Corps of Engineers
DWR Dworshak Tailrace NF Clearwater U.S. Army Corps of Engineers
GCL Grand Coulee Forebay Columbia U.S. Army Corps of Engineers
GCGW Grand Coulee Downstream Columbia U.S. Army Corps of Engineers
HGH Hungry Horse Forebay SF Flathead U.S. Army Corps of Engineers
HGHM Hungry Horse Tailrace SF Flathead U.S. Army Corps of Engineers
IHR Ice Harbor Forebay Snake U.S. Army Corps of Engineers
IDSW Ice Harbor Tailrace Snake U.S. Army Corps of Engineers
JDA John Day Forebay Columbia U.S. Army Corps of Engineers
JHAW John Day Tailrace Columbia U.S. Army Corps of Engineers
KLAW Kalama WA Columbia U.S. Army Corps of Engineers
LEWI Lewiston ID Clearwater U.S. Army Corps of Engineers
LIB Libby Forebay Kootenai U.S. Army Corps of Engineers
LGS Little Goose Forebay Snake U.S. Army Corps of Engineers
LGSW Little Goose Tailrace Snake U.S. Army Corps of Engineers
LWG Lower Granite Forebay Snake U.S. Army Corps of Engineers
LGNW Lower Granite Tailrace Snake U.S. Army Corps of Engineers
LMN Lower Monumental Forebay Snake U.S. Army Corps of Engineers
LMNW Lower Monumental Tailrace Snake U.S. Army Corps of Engineers
MCN McNary Forebay (Washington) Columbia U.S. Army Corps of Engineers
MCQO McNary Forebay (Oregon) Columbia U.S. Army Corps of Engineers
MCPW McNary Tailrace Columbia U.S. Army Corps of Engineers
PAQW Pasco WA Columbia U.S. Army Corps of Engineers
PECK Peck ID Clearwater U.S. Army Corps of Engineers
PRD Priest Rapids Forebay Columbia U.S. Army Corps of Engineers [1961-1997] and Grant County PUD [1998-present]
PRXW Priest Rapids Downstream Columbia U.S. Army Corps of Engineers [1995-1997] and Grant County PUD [1998-present]
RIS Rock Island Forebay Columbia U.S. Army Corps of Engineers
RIGW Rock Island Tailrace Columbia U.S. Army Corps of Engineers
RRH Rocky Reach Forebay Columbia U.S. Army Corps of Engineers
RRDW Rocky Reach Tailrace Columbia U.S. Army Corps of Engineers
SKAW Skamania WA Columbia U.S. Army Corps of Engineers
TDA The Dalles Forebay Columbia U.S. Army Corps of Engineers
TDDO The Dalles Tailrace Columbia U.S. Army Corps of Engineers
TDTO The Dalles Tailrace Columbia U.S. Army Corps of Engineers
WAN Wanapum Forebay Columbia U.S. Army Corps of Engineers [1966-1998] and Grant County PUD [1999-present]
WANW Wanapum Downstream Columbia U.S. Army Corps of Engineers [1995-1998] and Grant County PUD [1999-present]
WRNO Warrendale OR Columbia U.S. Army Corps of Engineers
WANO Wauna Mill OR Columbia U.S. Army Corps of Engineers
WEL Wells Forebay Columbia U.S. Army Corps of Engineers
WELW Wells Tailrace Columbia U.S. Army Corps of Engineers
WFF Willamette Falls (Sullivan Project) Willamette Oregon Department of Fish & Wildlife
  1. Click on the data inventory icon to view the DART River Environment Data Inventory for All Parameters and All Years. This information is displayed in a new browser window.
  2. Click on the project name to view additional information about that project, including operating agency, construction dates, DART datasets, and project photo. This information is displayed in a new browser window.

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.

Inflow, Outflow, Spill, and Temperature (Scroll Case) data are collected at the project (dam). Spill Percent is calculated by DART from the Outflow and Spill values. Temperature (WQM), Barometric Pressure, Dissolved Gas and Dissolved Gas Percent are measured at Water Quality Monitoring stations in the forebay and tailrace of most projects and other key locations in the basin (prior to 1995, these data are from a variety of sources within the U.S. Army Corps of Engineers). Turbidity is measured in the forebay or in the fish ladders at a project. Elevation is measured in the forebay of a project.

Bonneville Dam, 18 July 2006: The USACE initially reported incorrect hourly Bonneville spillway discharge for 2002-2004. 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.

Wells Dam, 13 August 2012: The DCPUD has requested the water temperature data reported as the "Wells Scrollcase Water Tempurature" obtained for DART from prepared USACE text files be removed as erroneous. The Wells project does not report scrollcase water temperatures. This data has been removed from the publicly accessible DART dataset.

June 5 - July 9, 2013: DART reported partial averages for outflow and spill from several Upper Columbia PUD projects. These values have been corrected to show the average of the complete day. We would like to thank the CCPUD for helping us correct this issue.

River Environment Glossary

Barometric Pressure
Barometric Pressure is atmospheric pressure at the site, given in mm Hg. It represents an average of hourly measures. Barometric Pressure is measured at Water Quality Monitoring stations in the forebay and tailrace of most projects (see Data Sites Map) and other key locations in the basin. Prior to 1995, the data are from a variety of sources within the U.S. Army Corps of Engineers.
Dissolved Gas
Dissolved gas is a measure of the pressure of dissolved gas in the water column. When spillway water plunges into the tailrace nitrogen is forced into the water at higher than normal levels. This condition, called supersaturation, occurs when dissolved gas pressure in the water actually exceeds the atmospheric pressure. The dissolved gas value represents a daily average of hourly meeasures within the range of 600-900 mmHg and is derived from U.S. Army Corps of Engineers gas monitoring efforts. Often collected at irregular intervals, this parameter may be missing values for one or more days, or reported values may be obviously incorrect. Dissolved Gas is measured at Water Quality Monitoring stations in the forebay and tailrace of most projects (see Data Sites Map) and other key locations in the basin. Prior to 1995, the data are from a variety of sources within the U.S. Army Corps of Engineers.
Dissolved Gas Percent
Gas percent reflects the degree of total dissolved gas supersaturation in the river at the given location. Gas percent is the daily mean of hourly observations. When gas pressure is exactly the same as the atmospheric pressure, the water is considered to be 100% saturated. If the gas pressure value is higher than atmospheric pressure, gas percent values rise above 100%. Daily averages are calculated from hourly values within the range of 90% to 200%. Gas percent data is often found to be quite noisy due to rapid fluctuations in spill volumes and atmospheric pressures. Dissolved Gas Percent is measured at Water Quality Monitoring stations in the forebay and tailrace of most projects (see Data Sites Map) and other key locations in the basin. Prior to 1995, the data are from a variety of sources within the U.S. Army Corps of Engineers.
Elevation
Elevation is given in feet above mean sea level and is a daily average of hourly measures. At most sites this will change less than a fraction of a foot over normal operations. Elevation is measured in the forebay of a project.
Elevation 10 Year Average
Daily average of elevation for a selected 10 year range. For each month and day, the data is summed for the selected 10 years and divided by the number of non-null data points available during that 10 year span.
Inflow
Inflow measurements represent the 24-hour average of hourly measures, reported by the U.S. Army Corps of Engineers. Inflow is given in kcfs, thousands of cubic feet per second.
Outflow
Outflow measurements represent the 24-hour average of hourly measures, reported by the U.S. Army Corps of Engineers. Outflow is given in kcfs, thousands of cubic feet per second. This represents the total outflow at any project, including spill and fish ladder flow.
Outflow 10 Year Average
Daily average of outflow for a selected 10 year range. For each month and day, the data is summed for the selected 10 years and divided by the number of non-null data points available during that 10 year span.
Spill
Spill also is given as a daily average of 24 hourly measures taken by the U.S. Army Corps of Engineers. It is also given in kcfs.
Spill 10 Year Average
Daily average of spill for a selected 10 year range. For each month and day, the data is summed for the selected 10 years and divided by the number of non-null data points available during that 10 year span.
Spill Percent
Spill Percent is calculated by DART from the daily averaged value for Spill divided by the daily averaged value for Outflow at a project.
Temperature (Scroll Case)
Temperature (Scroll Case) is water temperature in degrees Celsius. This data is measured at the scroll case (part of the powerhouse) at a project. If provided values are in Fahrenheit, they are converted to Celsius. Temperature records are typically not collected outside the salmon migration season, so they are not usually 365 days long. Values above 0 C and below 35 C are averaged for a daily value.
Temperature (Scroll Case) 10 Year Average
Daily average of scroll case temperature for a selected 10 year range. For each month and day, the data is summed for the selected 10 years and divided by the number of non-null data points available during that 10 year span.
Temperature (WQM)
Temperature (WQM) is water temperature in degrees Celsius. This data is measured at Water Quality Monitoring stations in the forebay and tailrace of most projects (see Data Sites Map) and other key locations in the basin. Temperature records are typically not collected outside the salmon migration season, so they are not usually 365 days long. Daily averages are calculated from hourly values above 0 C and below 35 C. Temperature at water quality monitoring stations was not collected prior to 1995.
Temperature (WQM) 10 Year Average
Daily average of water quality monitor temperature for a selected 10 year range. For each month and day, the data is summed for the selected 10 years and divided by the number of non-null data points available during that 10 year span.
Turbidity
Turbidity measures the water clarity, and by inference, the amount of particulate matter present. Turbidity is measured in the forebay or in the fish ladders of a project. Turbidity is reported in feet and measured with a Secchi Disk. In general, the Secchi disk is a 20 cm circular black and white plate. The Secchi disk is attached to a calibrated line and lowered into the water to the depth at which it disappears. The disk is then lifted until it reappears. The arithmetic mean of the two depths is considered the Secchi disk transparency or limit of visibility.

Calculating 10 Year Averages

The 10 Year Averages are calculated by DART for each calendar day of data at each project. For the current year and any given project/month/day, the data from the previous 10 years on that calendar day is summed and divided by the number of non-null data points available. Calendar day averaging was chosen because, historically, data observations begin on a specific calendar day. Calendar day averaging gives different results than day of year averaging.