These have been a topic of discussion on a recent project for us. They are kind of boring, but kind of expensive, and you might be required to put them in your park.
F.D.C. stands for Fire Department Connection and is a supplemental system to your base fire suppression system in the building. The fire department can force additional water into the building in the event of a fire when the base system needs additional support.
The catch is that while an FDC at the building is often accounted for in your base suppression system, a remote FDC is often required. Not really sure why, except it may be due to safety and proximity to a burning building. If you know, mention it below.
How much do they run? Typically around $350/ft. *Gut punch* The location is approved by the fire marshal after he reviews the civil plans, and he may not have the same financial incentive you do to reduce the distance of that line...
Just be sure to ask when drawing up the plans so it doesn't get missed during your preliminary budget phase!