| Sample Projects |
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| DIVE INSPECTION SERVICES PROJECTS |
15 Mile Sinkhole - Sterling Heights, Michigan, USA - October 2004
On August 22, 2004 a break in a 8 inch water main caused a sinkhole to form and then caused a break in the 11 foot diameter sewer interceptor below 15 mile road at Fontana Drive in Sterling Heights, Michigan. N.M.G.I. was retained by D.W.S.D. for all underwater construction work within the sewer interceptor.
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Iosco County - Michigan, USA - June 2005
The county road commission discovered that settlement of National City road was occurring across an old culvert that connects two abandon gypsum rock quarries. N.M.G.I. performed an emergency inspection of the culvert.
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Conner Creek - Detroit, Michigan, USA - May 2003 - June 2005
The Detroit Water and Sewage Department constructed a new treatment facility at the head end of Conner Creek in Detroit to capture, treat and disinfect combined sewage overflows that are discharged into the Detroit River. N.M.G.I. was retained for all underwater work for the construction project.
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| MARINE GEOPHYSICAL SERVICES PROJECTS |
Bay City, Michigan - April 2006
N.M.G.I. performed an underwater evaluation of the 10 bridge piers on Liberty Street and Independence Street bridges. For the purpose of this inspection the Bascule piers were inspected using underwater acoustic imaging and the smaller or minor piers were inspected using surface supplied air diving techniques.
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CN Rail
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Portland, Oregon - Port Harbor Sea Wall - September 2007
The City of Portland, Oregon hired NMGI to image their harbor sea wall and create a base line survey for future use in the event the structure under goes an event. The Harbor seawall in located in down town Portland Oregon on the west bank of the Willamette river. The harbor sea wall was built in 1927 and is constructed with wooded timbers. A concrete retaining wall rest on top of the structure. NMGI acoustically image over 5500 feet of Harbor seawall both the vertical and plan views. From this data NMGI was able to mosaic the entire harbor seawall. Incleded here are a few of the images and 3-D images of the harbor seawall.
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Two Harbors, Minnesota
Krech Ojard & Associates hired NMGI to do a completed underwater survey of the two northern loading docks in Two Harbors Minnesota. The docks are roughly 1500 feet long and 75 feet wide. NMGI was able to image and mosaic both docks together in the plan view and mosaic each side.
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Grand Traverse Bay, Traverse City, Michigan
MGI is assisting the Grand Traverse Bay Underwater Preserve in establishing a archaeological and historical record of shipwrecks and artifacts on bottom in both east and west bay. So far we have been able to identify several shipwrecks, horse carriage, geological formations, and the possibility of ancient stone formation.
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Burrard Dock, North Vancouver, British Columbia, Canada
NMGI used scanning sonar to create a baseline survey of the burrard dock facility do determine to amount of debris and targets on bottom. A mosaic was then created and merged with an aerial photo of the facility. From this data the facility can then start removing debris on bottom and also establish a baseline for security of the dock facility. |
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| 3-D MODELING PROJECT |
3-D Modeling of Midwest Bascule Bridge Pier
Kongsberg, Nautilus Marine Group & ASI Group pioneers and leaders in the area of underwater imaging have combined their expertise to do the first three dimensional model of a structure underwater based on real time data acquisition. The structure is Midwest bascule bridge pier. This is the fist step in developing this type of three dimensional modeling application. This will allow owners or governmental agencies to see their structures without having to dive on them. All data collected below the waterline is tied into the above portion of the structure with GPS RTK.
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