AUBURN HILLS, MICH. — Ryan Cos. US has plans to develop Oakland Crossing Medical Center, a 100,000-square-foot medical office building located on Great Lakes Crossing Drive in Auburn Hills. The Class A medical office facility is being developed on an approximately 18-acre site situated adjacent to the 1.4 million-square-foot Great Lakes Crossing Shopping Mall. The four-story building will feature floor plates measuring approximately 25,000 square feet. Construction is expected to begin in the spring, with completion slated for summer 2010. Mason Capitani and Gary Grochowski of Troy, Mich.-based L. Mason Capitani will coordinate leasing for the property. The estimated cost of completion for the project was not disclosed.