Corner of River Road and Market Street
The restoration of the Fort McIntosh site along River Road in Beaver includes picturesque landscaping, granite monuments and bronze plaques as well as the original stone footers of the walls and fireplaces. The site was dedicated on Oct. 7, 1978 by U.S. Army General William Westmoreland on the 200th anniversary of the original construction of the fort. Today, the Presidential Honor Guard is the direct descendant of the First American Regiment.

Constructed in 1778, Fort McIntosh was the first fort built by the Continental Army north of the Ohio River, as a direct challenge to the British stronghold at Detroit. It was the headquarters of the largest army to serve west of the Alleghenies, and the site of the treaty which opened the northwest and all future U.S. territories to orderly settlement. In 1784-1785, it housed the First American Regiment, and thus was the first permanent home of the U.S. Army in peacetime, except for two small detachments at Fort Pitt and West Point. After 10 years of service, the fort was de-commissioned in 1788.

In 1893, Judge Daniel Agnew of Beaver published a booklet entitled Fort McIntosh and Its Times. His purpose was to try to kindle interest in restoring and preserving of what remained of the fort at that time. No plan of Fort McIntosh exists, and so an accurate reconstruction was impossible.

In 1974, local archaeologists, with the assistance of the University of Pittsburgh and the Carnegie Museum, began excavations to locate structural evidence of the walls within the park beside River Road. They found stone footers marking the outer walls, followed by several more sections of stone footers for walls and fireplaces. The dig continued for four years, turning up more than 80,000 identifiable artifacts and fragments of archaeological significance.