12955 23 Mile Road

Shelby Township Michigan 48315

586.254.2040

 

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North Dixie Highway R.R. Grade Separation

 

Through the Michigan Department of Transportation, October, 2002 Bid Letting, Dan's Excavating, Inc. (DEI), was the low bidder for the Rail Consolidation grade separation in Monroe, Michigan.

 

N. Dixie HighwaySince early history, North Dixie Highway has been bisected by major rail lines servicing the South East Michigan area.  As a part of the city of Monroe's rail consolidation program, the subject project was developed and designed by Mannik and Smith working closely with the Norfolk/Southern and the Canadian National Railroads to design and implement a separation, while at the same time maintaining rail traffic.  To facilitate this, train traffic was relocated onto a temporary shoofly allowing the grade separation to be constructed in two stages.  DEI placed 13,500 tons of sub-ballast to perform the shoofly work. 

 

Monroe is underlain with shallow deposits of natural limestone extending to depths in excess of 100 feet below the ground surface.  In order to depress N. Dixie Highway, below the railroad grade, approximately 44,000 cubic meters of earth excavation was done and 22,000 cubic meters of rock needed to be excavated below grade.  For a majority of the rock excavation, drilling and blasting were used after which the rock was excavated with a PC-750 and PC-400.  For the restricted areas next to the railroad, where blasting was prohibited, DEI used a trenching technique using a rock trencher and a PC-400 with a 3,000  ft.-lb. hydraulic breaker.

 

Prior to beginning the "bowl" excavation DEI installed approximately 250 meters of 400mm pre-stressed concrete water main to avoid conflict with the proposed construction, and relocated the traffic onto a temporary run-a-round.  Following this relocation work the main bowl excavation was able to proceed.

 

Three main line railroad tracks were affected by the project with two separate bridges constructed contiguous to each other.  As a part of the project, DEI formed and placed 1,100 cubic meters of substructure concrete.  Once completed with the substructure 450,000 kg of structural steel had been set in place N. Dixie Highway RRand concrete decks had been cast.

 

Additional work items included:

  • 1,752 M of storm sewer ranging in size from 300 to 675mm most of which was installed in the limestone rock.
     

  • Construction of two storm water pump stations to dewater the depressed section of roadway and 1,438 square meters of reinforced earth retaining walls. 

Project Manager            Brian Cruickshank

Project Superintendent   Dean Peters

Carpenter Foreman        Dave Jankow