WARREN, Maine — The Warren Planning Board will continue its review of a proposed methadone clinic again when it meets in April.

The planning board began its formal line-by-line review Thursday night of the application filed by CRC Health Group for a methadone clinic at 1767 Atlantic Highway, also known as Route 1,

CRC Health Group has been trying to get approval from the town since the fall of 2010.

The board is awaiting more information about the impact of the clinic on the town’s sewage treatment system as well as the impact on traffic.

CRC attorney Walter McKee said the request from the Warren Sanitary District for a Cadillac-style engineering study was unnecessary since it was simple how much flow would go into the system. He said the amount of study being sought is frustrating.

The Maine Department of Transportation will hold a meeting March 22 for its review of the traffic impact of the project.