San Diego port commissioners have approved the environmental impact report on the proposed $520 million expansion of the San Diego Convention Center.

San Diego City Council is expected to review the impact report in October, and plans are also subject to later review by the California Coastal Commission. The city of San Diego is currently reviewing the legality of a new hotel room tax approved by local hoteliers in April to fund the bulk of the expansion’s cost.

The port district has pledged to contribute $60 million to the project over a 20-year span. A proposed 500-room expansion of the nearby Hilton San Diego Bayfront Hotel is also part of plans for the port-controlled property, contingent on the convention center expansion moving forward.

The expansion would add more than 700,000 square feet of space to the existing convention center.