John H. Chafee Blackstone River Valley National Historical Park Establishment Act

John H. Chafee Blackstone River Valley National Historical Park Establishment Act - Establishes the John H. Chafee Blackstone River Valley National Historical Park in the states of Massachusetts and Rhode Island as a unit of the National Park System.

Requires the Secretary of the Interior, through the National Park Service (NPS), to prepare a general management plan for the Park. Requires the plan to consider ways for using pre-existing and/or planned facilities and recreational opportunities in the John. H. Chafee Blackstone River Valley National Heritage Corridor.

Authorizes the Secretary to: (1) enter into cooperative agreements with the states, political subdivisions of the states, nonprofits (including Blackstone River Valley National Heritage Corridor, Inc.), and private property owners to provide technical assistance and interpretation in the Park and Corridor; and (2) provide financial assistance on a matching basis for activities to protect the Corridor's resources.