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Phase 1:


Delivery of aggregate base material for the project’s construction access drive north of the CSX r/r east of M-6.   Compaction of sand base material for the project’s construction access drive north of the CSX r/r east of M-6.
Excavation and placement of the project’s first manhole structure.   Installation of the first manhole structure’s concrete cover.
Installation of the first section of the project’s 48 inch concrete storm pipe.   Project’s new construction access drive off 48th Street east of the M-6 Expressway.
Construction access drive around the Thornapple Pointe Golf Course maintenance building.   Staked location for boring pit to construct the 48 inch storm pipe under the M-6 Expressway.
Storm pipe construction area within the wooded area east of the M-6 Expressway.   The contractor is constructing the temporary dock to allow the installation of a cofferdam which is necessary for the installation of the storm water diffuser below the river bottom.
The temporary dock is built to handle a crane for continued dock and cofferdam construction.   The contractor continues construction of the cofferdam in the river using sheet piling.
The contractor begins construction of the cofferdam on shore.   Here the contractor is using a heavy vibrating pile driver to set the sheet piling.
Here the contractor is using a crane with a clam bucket to excavate material from inside the cofferdam.  This excavation is necessary to set the grade for the future storm pipe.   Scuba divers were necessary to inspect the grade at the bottom of the trench within the cofferdam.
After manufacturing, the High Density Polyethylene Pipe (HDPE) diffuser was delivered to the site in two pieces.   The two pieces of the diffuser are being joined together using a large plastic pipe fusing machine.
Here the contractor is moving a single-piece three hundred and sixty foot section of 48 inch HDPE pipe downhill to connect to the diffuser.   The top end of the three hundred and sixty foot section of HDPE pipe.
The contractor begins lifting and moving the four hundred and thirty foot section of 48 inch diffuser and pipe towards it’s final resting place in the riverbed.   Here two cranes are lifting the diffuser and pipe out over the river cofferdam for installation.
Crane operators and contractors on the ground are communicating adjustments to the pipe alignment.   The pipes alignment with the cofferdam is complete.
The contractor begins lowering the pipe into the cofferdam.   The contractor also used two excavators to assist with the pipes alignment and the lowering of the pipe into the cofferdam.
Here the pipe is being lowered into the water where the pipe will be filled and sunk to the bottom of the trench below the bottom of the river.   The upstream end of the 48 inch HDPE pipe is connected to a manhole structure.
The pipe is connected to a steel flange pipe section at the manhole and forms for a steel bar reinforced concrete collar have been constructed.   Here the contractor is pouring concrete into the collar formwork.
This photo shows the contractor removing the sheet pile cofferdam from on shore and the river.   The 48th section (past section) of 48-inch concrete pipe being jacked into place under the M-6 Expressway.
The bore machine sees the light of day on the east end of the 48-inch storm pipe jack under the M-6 Expressway. The picture shows a bright dot inside the pipe which is the west end of the 400-foot long 48-inch pipe.   Contractors clean the material from the bore machine.  Once cleared the machine was pushed forward and removed from the site.
Here the Contractor is placing sand in the receiving pit to which is used as bedding material around the 48-inch pipe.   Here Contractor employees place sand around the 48-inch pipe and prepare it for compaction with portable compactors.
Here the Contractor employees exit the manhole drop structure after finishing work inside the manhole.    


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