Here is a breakdown of the maintenance backlog of national parks in Michigan, according to the Pew Charitable Trusts based on National Park Service data.
- Pictured Rocks has $10 million of deferred maintenance
- $2.4 million of this is toward historic maintenance
- $4.9 million of this is toward transportation maintenance
- Isle Royale has a $17.9 million backlog of deferred maintenance
- $3 million of this is toward historic maintenance
- $465,000 of this is toward transportation maintenance
- Sleeping Bear Dunes National Lakeshore has $16.3 million backlog of deferred maintenance
- $6.9 million of this is toward historic maintenance
- $1.7 million of this is toward transportation maintenance
- RIver Raisin National Battlefield Park has a $818,300 backlog of deferred maintenance
- $247,700 of this is toward historic maintenance
- $329,400 of this is toward transportation maintenance
- Keweenaw National Park has a $5.3 million backlog of deferred maintenance
- $5.1 million of this is toward historic maintenance
- $335,400 of this is toward transportation maintenance