A portion of Interstate 26 in Unicoi County will be reduced to one lane for two days this week for sinkhole repairs. A report from TDOT District 1 spokesperson Mark Nagi said the surface collapse below the highway was discovered near mile marker 27.8 eastbound near the Okalona Road exit. Nagi said reconstruction would cause the right lane to be closed through Wednesday then closure to the left lane for maintenance will take place Thursday.