Saturday marked a 7th straight day of work on a mine subsidence in Luzerne County. A large hole of water has now formed where the original mine subsidence happened almost a week ago. There are also a lot of white sand bags around the subsidence site. A DEP spokesperson said that over the weekend, a coffer dam was installed on the creek to eliminate the flow of water to the subsidence. On Sunday, another 80 cubic yards of concrete was pumped into the subsidence, which brought the total amount of concrete used up to 280 cubic yards. The concrete was topped with clay and rocks, and the flow in Toby Creek has visibly increased. The DEP expects some settling of the installed material and will continue to monitor over the next few days.