Interstate Technical Group on Abandoned Underground Mines
Fourth Biennial Abandoned Underground Mine Workshop
Abstract: 2001 Ohio DOT Abandoned Underground Mine Remediation Projects
During 2001, the Ohio Department of Transportation (ODOT) completed two significant projects for the purpose of remediating unstable surface and subgrade conditions related to abandoned underground mines beneath roadways. These two projects involved Interstate 77 and U.S.30 in northeastern Ohio. Both projects were completed concurrently between April, 2001 and October, 2001. Completion of the Interstate 77 project required the drilling and cement flyash grouting of unstable mine workings located 25 to 35 feet beneath 2000 feet of roadway. The cost of this project was $8.4 million. Completion of the U.S.30 project required the drilling and cement flyash grouting of two 250 foot deep vertical mine entries underlying the roadway. The cost of this project was $1.8 million. A brief overview of these two projects will be presented.