The effect of calcium magnesium acetate (CMA) deicing material on the water quality of Bear Creek, Clackamas County, Oregon, 1999

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Title The effect of calcium magnesium acetate (CMA) deicing material on the water quality of Bear Creek, Clackamas County, Oregon, 1999
Creator Tanner, Dwight Q.; Wood Tamara M.
Subject Water quality; Biochemical oxygen demand; Calcium; Magnesium; Trace elements -- Analysis; Trace elements; Runoff
Spatial Coverage Columbia River; Oregon
Description This report presents the results of a study by the U.S. Geological Survey, done in cooperation with the Oregon Department of Transportation (ODOT), to evaluate the effects of the highway deicing material, calcium magnesium acetate (CMA), on the water quality of Bear Creek, in the Cascade Range of Oregon. ODOT began using CMA (an alternative deicer that has fewer adverse environmental effects than road salt) in the mid-1990s and began this study with the USGS to ensure that there were no unexpected effects on the water quality of Bear Creek. Streamflow, precipitation, dissolved oxygen, pH, specific conductance, and water temperature were measured continuously through the 1998-99 winter. There was no measurable effect of the application of CMA to Highway 26 on the biochemical oxygen demand (BOD), calcium concentration, or magnesium concentration of Bear Creek and its tributaries. BOD was small in all of the water samples, some of which were collected before CMA application, and some of which were collected after application. Five-day BOD values ranged from 0.1 milligrams per liter to 1.5 milligrams per liter, and 20-day BOD values ranged from 0.2 milligrams per liter to 2.0 milligrams per liter. Dissolved copper concentrations in a small tributary ditch on the north side of Highway 26 exceeded the U.S. E.P.A. aquatic life criteria on three occasions. These exceedances were probably not caused by the application of CMA because (1) one of the samples was a background sample (no recent CMA application), and (2) dissolved copper was not detected in Bear Creek water samples to which CMA was added during laboratory experiments.
Publisher U.S. Geological Survey
Contributors Oregon Department of Transportation
Date 2000
Type Text
Format application/pdf
Digitization Specifications pdf file copied from USGS website (http://or.water.usgs.gov/pubs). Uploaded into CONTENTdm version 3.7.
Identifier http://or.water.usgs.gov/pubs_dir/Abstracts/00-4092.html
Source Tanner, Dwight Q. and Wood Tamara M., 2000, The effect of calcium magnesium acetate (CMA) deicing material on the water quality of Bear Creek, Clackamas County, Oregon, 1999, Portland Oregon: U.S. Geological Survey Water-Resources Investigations Report 00-4092, 28 p.
Language eng
Rights Management Public Domain, Courtesy of the USGS
Holding Institution University of Utah
ARK ark:/87278/s6qf8rsz
Setname wwdl_er
ID 1145715
Reference URL https://collections.lib.utah.edu/ark:/87278/s6qf8rsz
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