Baltimore developer St. John Properties Inc. has started work on the 10th building in an office park at Aberdeen Proving Ground to meet strong demand driven by the federal base realignment process.

The three-story, 75,000-square-foot building at 6190 Guardian Gateway will be the latest addition to the Government and Technology Enterprise, or GATE, office and research and development park at APG in Harford County.

The developer, which is building the project without any tenants signed, expects to finish in November. The building is designed to connect with APG's secure IT network and will comply with federal anti-terrorism protection requirements, St. John Properties said.

It's unusual for developers to construct office buildings "on spec," but the GATE park "has had such strong demand, and our goal there is to always have product available that somebody can move into," said Jerry Wit, a senior vice president at St. John Properties.

The federal base realignment and closure process, or BRAC, has resulted in Aberdeen Proving Ground's emergence as the nerve center of the Army's technological development and procurement functions, which in turn has attracted government contractors and other agencies to the area.

The 416-acre office park, with 625,000 square feet of existing buildings, has a capacity of up to 2 million square feet of multistory and single-story office buildings, research and development flex space, and shops.

Tenants include contractors and agencies that support APG, such as The Boeing Co., CACI, General Dynamics, L-3 Communications, Raytheon, Science Applications International Corp. and Telford Aviation.

Lorraine.Mirabella@baltsun.com

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