Palisades Interstate Park and its creator, the Palisades Interstate Park Commission, was formed in 1900 by governors Theodore Roosevelt of New York and Foster M. Voorhees of New Jersey in response to the destruction of the Palisades by quarry operators in the late 19th century. The Palisades are the cliffs on the west bank of the Hudson River across from and continuing north of Manhattan Island. The commission consists of ten commissioners, five appointed by each governor, who serve staggered five-year terms.
In 1900, George W. Perkins was appointed chairman of the newly formed commission by governor Roosevelt. He hired Major William A. Welch as assistant engineer, and in 1914 named him chief engineer and general manager. Under Welch's leadership, the Palisades Interstate Park grew from the initial 10,000-acre (40 km2) Bear Mountain State Park to the more than 40,000-acre (160 km2) Harriman State Park. By 1919 nearly a million people a year were coming to the park.