yards. When Conrail was formed in 1976, GTW sought to acquire some of its routes in Michigan. It gained 151 miles (243 km) of trackage between Saginaw and Bay City as well as near Muskegon and Midland, Michigan. Several of GTW's cuts in its expenditures came from reductions in its workforce through changes it negotiated in union work rules. In 1978, it discontinued its Lake Michigan railcar ferry operations after several years of annual financial losses of over $1 million. By 1987, the company sold its headquarters building on Lafayette Avenue in Detroit and moved to the new office-park complex Brewery Park. The complex was developed on the site of the former Stroh's Brewery near downtown Detroit. Locomotive performance was also enhanced with a rebuilding program of its EMD GP9s. By the 1990s, several miles of routes and facilities were abandoned or sold to regional rail companies. GTW would eliminate all of the former Pontiac, Oxford and Northern line north of General Motors' Lake Orion manufacturing plant by 1985. In 1987, the former Cincinnati, Saginaw, and Mackinaw and the former Detroit, Grand Haven and Milwaukee routes north of Durand were sold to the Central Michigan Railway. Elsdon Yard, GTW's primary terminal and rail yard in Chicago, had been downsized and closed by 1990. It had also sold almost the entire route of the Detroit, Toledo and Ironton in 1997 to the shortline rail operator Railtex. By 1998, it had abandoned the entire former Michigan Air Line route except for a portion in Oakland County, Michigan, which it sold to Coe Rail. With the end of SEMTA commuter rail service to downtown Detroit, in 1983, GTW abandoned and sold its trackage from the Milwaukee Junction area to downtown Detroit. That line was the former route to Brush Street Station and its railcar ferry dock on the Detroit River. It is known as the Dequindre Cut, which has been transformed into an urban greenway rail trail. By the year 2000, engine terminals and maintenance facilities had also been eliminated or downsized in Chicago, Detroit, Durand, Pontiac, Port Huron and Battle Creek. CN North America In December 1991, Canadian National announced a corporate image and restructuring program to consolidate all of its U.S. railroads under the CN North America brand. Grand Trunk Western, along with other CN owned subsidiaries, would see their images replaced with the CN logo and name. All GTW corporate