Jurisdiction: Abandoned Mine Lands
2015 Completed Projects Archive
2015 Columbus Phase 15 AML Project
This project involved the elimination of nearly 5,000 feet of abandoned mine highwalls at two abandoned surface mines in Burke County. About 255,000 cubic yards of spoil material was used to backfill the highwalls and about 65 acres were reclaimed at two sites. Earthwork at the Columbus Phase 15 AML site started on July 11, 2015, and was completed August 21, 2015. Seeding operations and straw wattles placement were completed on September 9, 2015. The contracted work was completed for a total cost of $477,125.
2015 Scranton/Bowman Phase 3 and Wilton Project
The objectives of this project were to drill holes to locate underground mine workings and to pump a cementitious grout through these holes to fill the mine voids and reduce the likelihood of collapse. This project involved drilling and pumping pressurized grout into collapsed underground mine workings. Project areas included an undermined farmstead near Reeder and roadways near Scranton, Bowman and Wilton. The final totals were 24,291 feet of drilling, 3,409 feet of casing, and 7,940 cubic yards of grout. The amount of grout injected into mine voids at each site were 953 cubic yards near Reeder, 86 cubic yards at Scranton, 4,500 cubic yards north of Bowman, and 2,400 cubic yards southeast of Wilton. There were two contracts for this project, one for construction and one for material testing and the combined contract costs were $1,509,449.
This is a link to the project summary report.