The future of a Milwaukee high-rise once billed as “the tallest mass timber building in America” is in doubt after the general contractor sued the developer’s affiliates on March 6 for allegedly owing $11.3 million, the Milwaukee Journal Sentinel reported. Fond du Lac, Wisconsin-based C.D. Smith Construction seeks the foreclosure sale of the parcel at 1005 N. Edison St. Madison, Wisconsin-based developer Neutral stopped construction of the 31-story, 357-unit apartment building in September, according to the newspaper. The contractor is suing Neutral affiliates The Edison SPE and The Edison Project LLC. In October, a city official told the Milwaukee Journal Sentinel that the project faced a $25 million funding gap. The suit names 11 other firms that have filed for unpaid bills connected to the development, including Chicago-based Hartshorne Plunkard Architecture. Neither C.D. Smith Construction nor Neutral replied to Multifamily Dive’s request for comment.