DON KOIVISTO Director State of Michigan Department of Agriculture Oakland-Macomb Interceptor Drain Drainage District October 26, 2010 For Immediate Release Macomb Oakland Interceptor Repair Project Reaches Another Milestone (For additional information, contact Gene Schabath, community liaison for the Oakland Macomb Interceptor District, at (586) 469-7424) The massive $144 million Oakland Macomb Interceptor construction and repair project has hit the bottom at the Common Road construction site --- and that’s great news. Workers for Ric-Man Construction, Inc. have excavated 85 feet below ground level to a critical point under the 12-foot , 9-inch diameter interceptor, and have poured a concrete floor called a mud mat that will allow workers to construct the important sanitary flow control gate system. The construction site --- which entailed building a 53-foot diameter access shaft --- is located immediately north of Common Road between Schoenherr and Hoover in the ITC corridor. “The pouring of the concrete mud mat is another important milestone for the access shaft project at the Common Road construction site in Warren,” said Macomb County Public Works Commissioner Anthony V. Marrocco. The Common Road access shaft is one of five such projects that will be built in Warren and Sterling Heights. The shafts, which measure between 24-feet and 53-feet in diameter at the various locations, will allow machinery, equipment and workers to be lowered into the spacious interceptor to make repairs on the sewer line that was built by Detroit and transferred to the Oakland Macomb Interceptor Drain Drainage District in 2009... “The concrete mud mat, which is six-inches thick, will give workers a uniform surface when they construct the sanitary sewage flow control gates,” Commissioner Marrocco said. “It’s a milestone because all of the efforts from day one, on Feb. 19 when construction started at Common Road, was to get to the bottom to start work in the flow control gates.” Prior to pouring the 39-foot-diameter mud mat, workers cut off a 25-foot section of the huge interceptor and installed a 50-foot, 7-foot diameter metal flume in two sections from one end of the open interceptor into the other open end. That allows wastewater to continue to flow through the interceptor while the gate construction is ongoing. Once the project is complete, the flow control gates will hold back the flow of wastewater upstream while workers make repair downstream. The wastewater can be contained for six to eight hour stretches while the repairs are made below the gates. After the mud mat was in place at the Common Road site, workers poured 430 cubic yards of cement into a reinforced steel structure that will act as the base for the steel flow control gates, said Lou Urban an engineer with Anderson, Eckstein & Westrick, of Shelby Township. The 1½-inch thick steel flow control gate is 17-feet, 9-inches tall and 15 ½-feet wide. When workers want to make repairs, the hydraulic-operated gate will be lowered into the interceptor to block the flow. Steel vertical guides, on which the gates run, have already been installed. A concrete weir wall, which will act as a fail safe, will be constructed above the gate. The one-foot thick weir is 8 ½ feet high and 15 feet wide. “If we had trouble lifting the gate or if the flow exceeded the capacity, the flow would go over the weir in a controlled manner,” Urban said. Once the gate system is completed, workers will build a series of concrete panels on top on the 53-foot wide access shaft. The panels will be lifted by a crane when machinery and workers have to be lowered into the interceptor for repairs or other work. The top is scheduled to be completed in the spring, possibly in May. The top will be 33-foot square and will be flush with the ground and will not be an eye sore. “The construction is going well,” Urban said about the Common Road project. “Our excavation was perfectly centered on the interceptor which is quite an achievement considering the depth (80 feet).” The Common Road access shaft project is one of five that will be built in Warren and Sterling Heights. Construction cost of these projects alone is $28 million. The other four access shaft construction sites are at the following locations: 10 Mile Road between Hoover and Schoenherr in the ITC corridor. This project is comparable to the Common Road site. ITC corridor immediately south of 15 Mile Road, across from Sterling Heights High School. The mud mat is nearly completed on this shaft, which measures 72-feet in diameter and extends 77-feet below the surface. Plans call for construction of a $6 million pumping station to dewater upper portions of the interceptor. Dodge Park, a quarter mile north of 15 Mile in Sterling Heights. The mud mat and base slab have been completed. The access shaft is 27-feet by 29-feet and extends 60 feet down to the interceptor. Utica Road, west of Dodge park Road, in front of Sterling heights City Hall. Workers, who started on this project in September, have reached the top of the interceptor, 46-feet below the surface. Once these construction projects are completed next year, bids will be taken for the repair of the interceptor. Repairs are expected to be in the $100 million range. The project is one of the largest such projects in the annals of the state, Commissioner Marrocco said. The 21-mile long interceptor, which provides service for 830,000 residents in 24 communities in Macomb and Oakland counties, starts at 8 Mile east of Van Dyke in Detroit, runs north through Warren, Sterling Heights and then veers northwest starting at 15 Mile Road in Sterling Heights and eventually ends up in Oakland County near Dequindre and 22 Mile Road. A secondary sewer line called the Avon Arm, runs from Dequindre and South Boulevard in Troy, and connects to the main interceptor near M-59 and the Clinton River. The Avon Arm, which consists of 36- inch and 48-inch pipes, serves Rochester and Shelby Township. Commissioner Marrocco said the two counties will save millions of dollars over the years by performing the repairs themselves. By owning the interceptor, this also allows Macomb and Oakland to set the priorities regarding the interceptor and make decisions that will best serve the constituents, said Commissioner Marrocco and Oakland County Water Resources Commissioner John McCulloch.
Pages to are hidden for
"Complete story Macomb County Michigan"Please download to view full document