We should ask the council about who owns it - the railroad most likely does have some right of way. But it is listed among the city pocket parks.
http://ci.lakewood.oh.us/pw_parks.html
This seems to me to be the most neglected of the city parks. I don't even think there is a plaque there to indicate that is the Issac Warren park or what he did for the city. (Historic Society?) They say there are picnic tables for people having their lunch there, but I have really missed that, maybe because it lacks the other amenities. My assumption is the city is maintaining it now, but it is easier to maintain due to the fact that there is little there.
It sounds like you have lots experience on this topic having been in the trenches previously.
But it seems as if we aren't going to do anything with it and no one is using it, we ought to sell it to someone who will develop it.
Here is a list of the small parks in Lakewood called pocket parks:
Pocket Parks:
Park Row Park: Located at 1386 Park Row, offers the following:
•Playground equipment
•Picnic tables
Celeste Park: Located at the corner of Clifton and West Clifton, this park is a scenic area to sit at a park bench or table to relax and enjoy a bit of nature.
Niagara Park: Located at the corner of Lakewood Heights (south of I-90) and Niagara, offers the following:
•Playground area
•Picnic table
Sloane Park: Located at 1355 Sloane Ave. this park offers a scenic place to sit and relax to enjoy the two Adopt-a-Spot gardens.
City Center Park: Located at the intersection of Cook and Detroit Ave. this scenic area offers a place to sit and relax while shopping.
Isaac Warren Park: Located on Warren Rd. just north of Detroit, this scenic pocket park offers a place to sit and relax during a lunch break Two picnic tables are available in a greenspace located across the street just north of the parking lot.
Clifton Prado Park: Located at 1265 Clifton Prado, this park offers the following:
•Playground area
•Picnic table
"Life is not measured by the number of breaths we take, but by the moments that take our breath away." ~ George Carlin