ShareRead ModeNavigate to:Over the past 4 1/2 years, The Pew Charitable Trusts has collected and shared data about the numerous repairs needed throughout our country’s 100-year-old National Park System and worked with hundreds of local and regional organizations around the nation to share this information with policymakers. These case studies include national historic sites that have been closed to visitors because of structural and safety concerns, such as  in Harpers Ferry National Historical Park in West Virginia. Or Mammoth Cave National Park in Kentucky, which has a decades-old...…ShareRead ModeNavigate to:Over the past 4 1/2 years, The Pew Charitable Trusts has collected and shared data about the numerous repairs needed throughout our country’s 100-year-old National Park System and worked with hundreds of local and regional organizations around the nation to share this information with policymakers. These case studies include national historic sites that have been closed to visitors because of structural and safety concerns, such as  in Harpers Ferry National Historical Park in West Virginia. Or Mammoth Cave National Park in Kentucky, which has a decades-old...WW…