Manhole cover tickled from underneath as the tributary to Allen Creek gushes through the pipe due to torrential rain. [photo] [photo] Also, for future reference, the trash/recycling carts can divert an amazing amount of water away from the storm drain grates if jammed against the curb. I gave one some breathing room. [photo] Background reading on sewers: [link]
Lower Mulholland
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Wow!
We need to start giving these creeks names, so that they can be distinguished from each other; I dub this one “Mulholland Creek, a tributary of mighty Allen Creek”.
Second major deluge managed to dislodge manhole cover. Teamed up with neighbor to put it back in place after minor geyser subsided.
Via Matt Naud, the city’s environmental coordinator: [link]
The link is interesting because it has a different set of terms for floodway and floodplain than I am familiar with. I have been concerned with Ann Arbor’s allowing development in the floodplain for some time. This page includes the floodway and a “flood fringe” in the floodplain. Many may not be aware that the FEMA map of floodways was redone (remapped and calculated) in 2008 but for some reason has not yet been announced or incorporated into city planning. (The Allen’s Creek Watershed Group is the authority on this, I have only incidental information.) The “100-year flood” in many communities has occurred a couple of times in the last 5 years or so, and this year seems to be setting a pretty high record.
Ann Arbor, unlike some more progressive communities, allows building in the floodplain. Aside from the potential damage to those structures, they impede flood flow and cause potential damage in other areas exposed to flood dangers.