I had never heard of Monroe park so I looked it up. Here is what the county has to say;
This is a small, undeveloped park along the South Yamhill River. There are not restrooms or picnic tables. The access is currently restricted. This park is found on Hwy 99W, 4 miles south of McMinnville and located at Whiteson Landfill on Riverbend Road.
I am not sure why we need a park next to the dump that we can't get to?