I look out on a surface was re-laid around 12
years ago, all black rubber and tar seams. It was pristine,
replacing the mess that had bushes growing out of the surface.
Over the years, though, things are bound to change. A reverie
unfolds.
From somewhere comes gravel. First,
just a pebble here and there. Then, larger accumulations collect
near the drains. I suppose rain washes them into piles, but where
do they come from in the first place?
My theory is that high winds pick them
up off of fields and riverbeds, watersheds etc. Particularly
tornadic-speed winds, which can throw a semitrailer like a toy.
These must be carried aloft, and then eventually fall down with rain
to collect on rooftops.
Anyway, the pebbles slowly
accumulate. Pigeons make this particular roof their way-station and
meeting-place – I'm sure they do with most other downtown roofs as
well. So their droppings sprinkle the roof surface along with the
pebbles. Sometimes there are larger droppings, since the crows like
to roost there every winter. It would seem to me that all of these
materials, along with a bit of silt carried in from the wind, could
easily create topsoil on the roof surface, eventually. (If no
maintenance were done, and if water was perhaps allowed to accumulate
a bit more instead of being drained off.)
Do not know if roof maintenance
includes spraying off bird droppings and gravel. But in any case,
there is a substantial accumulation of debris on even a high roof
over time. The birds pay a visit, the gravel and raindrops patter
away, and the roof slowly wears over time. On this particular roof,
the company has satellite dishes located, and such things. So
undoubtedly there is some kind of cleaning routine that goes on.
Despite the birds best efforts, the roof gets maintained, and any
nests located too close to some kind of critical infrastructure get
unceremoniously dumped.
But I like to play out a fantasy
in my mind. The building, and the downtown area, gets vacated, by
some major event. No more human occupation, it is left to nature.
The 10-story building interior has no more air movement or
ventilation of any kind. After a decade or two, the interior walls
are covered in mildew and mold. Insects run amok in the basements.
Perhaps some mice have made it inside. And the roof surfaces begin
to get more coated with bird droppings, silt and eventually, seeds in
the droppings. Some grass seeds sprout in the “topsoil” and
grow. Soon, the roofs have a sparse carpet. More birds make their
home – crows in the winter, perhaps sparrows, pidgeons and
songbirds in the summer. Windows that were once tightly sealed
develop tiny chinks as the building settles over time. Moisture that
penetrates the building, along with any animal droppings and
windblown silt, provide the new 'carpeting' on which more flora grow.
The basement and interior floors
might be populated by forests of fungi several feet tall, on the
walls and floors. Bugs and rodents would make their way around in
here. As our imaginary clock moves forward, to say over a hundred
years, to two hundred, more windows get cracked by storms, or chinks
develop. Minor building damage that would have been repaired is
left to the wind and elements. More cracks and holes develop, and
many more creatures get in.
Small trees on the roof send
their roots deep into crumbling masonry, speeding the process.
Floors become caves full of detritus. Small critters battle it out,
and some become food for larger prey. Birds populate the roof
greenery, and the ground floors are crawling with rodents. Every few
years, with enough wind and weather events, the building settles or
crumples a bit further.
At the 500-year mark, the building
is hardly recognizable as a building any more. It is a tall mound of
greenery. Interior spaces are largely populated with decomposed
materials, soil, roots and the like. Where the roof once sat
exposed to the elements, now there is a foot of topsoil with many
growing plants on top.
At the 1,000 year mark, the building is a
large mound, with very few intact elements.
Some of the plastics may survive in a
browned-degraded state. Otherwise it is all streaked, discolored
dirt and clay. And future civilizations returning to the area can
only speculate and wonder what function this barely hinted-at
structure performed. If they even detected that a structure
existed.
Then I shake my head, awakening from
this daydream. There is work to be done here, while I am around and
alive and the building is intact! Onward, ho.