You can get more information about the Lasalle Park dog park here:
http://www.thebarkyard.org/
Off leash dog parks are a great idea for people who want to allow their dogs to roam free, or at least roam free in a confined space.
The biggest problem with establishing and maintaining an off leash dog park are the people who feel free to ignore leash rules. They have no incentive to contribute to a dog park because they have no integrity when it comes to leash rules. Why should they pay to have their dog off leash when they can just as easily get away with breaking the law by letting their dog off leash illegally?