GRANDJEAN, Idaho — State Highway 21 (SH-21) between Grandjean and Banner Summit will close Thursday, Feb. 29 due an increased risk of an avalanche occurring in the heavily avalanche-prone area.
All lanes of SH-21 will be closed between mile marker 93.7 and mile marker 105.5, between Grandjean and Banner Summit. The stretch of highway will remain closed until further notice.
The Idaho Transportation Department (ITD) announced the closure Thursday. Crews will reevaluate roadway conditions on March 1 to determine if the highway will reopen.
To find updates on road closures and openings, visit the 511 website.
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