Heavy Seas Alehouse, a brewpub affiliated with the popular Baltimore brewery, is expected to open in Rosslyn this December.

The alehouse is currently under construction at the corner of N. Oak Street and 18th Street N. and Director of Operations Vince Cassino said it will open in December “if all goes well.”

The restaurant is 6,000 square feet with capacity for 160 patrons inside, and will have outdoor seating for up to 40 customers, Cassino said. There will also be a private event room with space for 60 people.

The bar will have 15 taps rotating primarily with Heavy Seas beers, but Cassino said there could be beers from other local breweries on occasion. The alehouse will open daily for lunch at 11:00 a.m. and will be able to fill growlers for customers. A Sunday brunch may eventually be offered as well, Cassino said.