Description:
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Currently exist in several locations, e.g. : Ellsworth RWIS station I-90 at M.P. 65.2; Sheridan Lake Road in Rapid City; Vivian RWIS station on U.S. 83 at M.P. 101.9 in Pierre; Montrose RWIS station on I-90 at M.P. 376 in Sioux Falls; Belvidere RWIS station on I-90 at M.P. 172.5; Summit RWIS station on I-29 at M.P. 206.8.
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