These two homes were condemned early on with the discovery of the sinkhole on December 24.
The home shown in the top photo was located at the corner of 15 Mile and Eberlein.
The home shown in the bottom photo was located on 15 Mile, just west of Eberlein.
Both were demolished near the end of March.
Work continues on the site of the damaged interceptor, with special emphasis on the “Sewer Repair Recovery Shaft” at this time. Significant progress has been made, with full bypass pumping in place, sewage is being diverted around the damaged pipe section. The bypass pumps are installed at a control station located just west of Garfield Road on the south side of 15 Mile Road. They pump the sewage into pipes that continue along 15 Mile, past the damaged section, and then back into the interceptor at a manhole located at the corner of 15 Mile and Fontana Drive, west of Hayes Road. Odor-reducing equipment consisting of a large blower and carbon filter unit, is also now in place just west of the Fontana Drive manhole.
Drilling rigs are boring holes around the perimeter of the repair site to install piers. When completed this will allow work crews to proceed with excavating the approximately 300 ft x 25 ft area to a depth of 65-70 ft. Then they will begin the actual repair of the damaged interceptor.
The photo above shows the “pre-cut” area where approximately 15 feet of soil has been removed from the site of the damaged interceptor. The series of piers that are being installed will support a concrete and steel structure that will serve as “retaining walls,” to prevent soil wall cave-ins during the remainder of the repairs.
The pier holes being drilled are approximately 70 feet deep, and steel vertical pipes are inserted into each of these holes; half of them will be filled with 70-foot I-beams and grout, which to a layman looks like mortar, and the remainder of the pipes will be filled only with grout. Each of the piers requires about 28 yards of grout that is pumped in from transit mix trucks that make frequent trips to the repair site.
As this is written, 75 of the 244 piers needed to complete this phase of the project are in place, and crews are working literally day and night to accomplish this important task. Once completed, the remaining approximately 48 feet of soil will be removed from the damaged area, and the repair work to the actual interceptor can begin. The goal is to have the interceptor repaired, and the site and surrounding area restored and in good condition by December.
The Macomb County Public Works Department has hired a company to inspect more than 17 miles of sewer pipes in the county with robots, and this work has begun in the area of the damaged interceptor. They will be checking the condition of the piping, and noting areas that may need further assessment and repairs. Another company was also brought in to clean the interceptor, and work is proceeding with the cleanout, especially in the areas east of the actual break.