"Rain tax" unfair for smaller homes

Matt Santoni has an article in today's Trib concerning our stormwater fee public hearing that was held on Tuesday night. That reminds me.  I need to put up the podcasts from the two commission meetings.  It was a very long night!
Bill Lewis got a standing ovation for his comments. As usual, he made excellent points.  I have to say that I understand the need for this fee. We had waist high water in our garage and basement for the 100 year storm, the 101 year storm, and when Hurricane Ivan hit.  The Municipality corrected our street's problem, but there are many others still faced with this issue. I am just having difficulty with how the fee will be implemented. My street has some of the smallest houses in Mt. Lebanon. It is unfortunate that we will be assessed the same as homes in the more affluent areas. Yes, I will pay my fair share, but there were two cars which were totaled during those storms, on our street alone.  Our neighborhood took quite a hit.  Personally, we had considerable damages and our insurance wouldn't cover it.   I guess what I am about to suggest would be an accounting nightmare, but wouldn't it be better to figure the average square footage of impervious surfaces per street and charge accordingly? Likewise, as Bill pointed out, those who have rain gardens and leach beds, shouldn't be charged at all.  There has to be a more equitable solution to our problem.
Stormwater fee plan steams some Mt. Lebanon residents

Update: For those interested, here is a link to building a rain garden. http://learningstore.uwex.edu/assets/pdfs/GWQ037.pdf