Complete story Macomb County Michigan by nikeborome

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									                                                           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.

								
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