Complex sentence: With the opening of the Deer Island Sewage treatment plant in 1968, the discharge of sewage from the Moon Island facility was put on emergency stand by status and the flow of the sewage to Moon Island was diverted to Deer Island.
Split into simpler sentences: With the opening of the Deer Island Sewage treatment plant in 1968, the discharge of sewage from the Moon Island facility was put on emergency stand by status. The flow of the sewage to Moon Island was diverted to Deer Island.