This is our local park composting setup for leaves and grass, not long after having removed finished material. Leaves (browns) are abundant in late winter, and grass is abundant in summer. Water is usually an issue, as volunteers who take leaves don't have time to wet everything down, so that usually gets resolved when we turn the compost (a community event 2-3 times a year). We just had an automatic watering system installed, so that should help. Doors are attached with wingnuts and come off fairly easily.
So nice that you have local park composting. How does it work, is it just used for park maintenance, or can local people put their yard waste in it too? How's the compost used?
It is primarily for park-generated materials, though a few neighbours put their yard wastes in, and sometimes picnic or lunch leftovers get put in. There isn't much yard waste here, just occasional branch trimmings or dead potted plants. Volunteers who help with turns sometimes take some compost home, otherwise it gets returned to the park. The park volunteers rake leaves a little too enthusiastically, so grass tends to get killed off if it is somewhat over-shaded under the trees, so it's good to get some compost on the soil to keep the dust down.