Chaz,
Permeable surface pavement was part of the original plan.
However, obtaining the funding for this project has been extremely tough and the permeable pavement just sent the cost through the roof and made it way beyond our reach. As you know, it's a tough fund raising environment these days. After examining the long term effectiveness of permeable pavement (it tends to lose it's permeability with time due to build up of road dust etc - this is a very heavily used parking lot) and our budget constraints.....we made what we think to be the best budget compromise and went with conventional surfacing.
As it stands right now, there's a large, broken up, pot-hole filled lot with no storm water controls that runs sediment into the stream. The new lot will have excellent storm water management. We feel that the improvement project was better than doing nothing.