Georgia Democratic senator Raphael Warnock steered $16.4 million in federal earmarks to a project that benefited the co-owner of his controversial low-income apartment complex.

The funding was intended to construct a trail connecting a residential and commercial complex known as “Pittsburgh Yards” with other portions of Atlanta’s BeltLine. The developer of Pittsburgh Yards is Columbia Ventures, part of the Columbia group of companies that co-owns and operates a low-income housing complex with Warnock’s church.

The funding raises questions about whether Warnock’s business relationship with Columbia had any bearing on his funding decision. Warnock did not respond to a request for comment.