Reservoir ball pit
October 30, 2011 3:10 PM Subscribe
For millennia, man has yearned to block the sun (with black plastic balls).
posted by LobsterMitten (46 comments total)
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If an un-covered public water reservoir contains bromide, sunlight will combine the bromide with the chlorine used for reducing bacteria -- thus poisoning the water with carcinogenic bromate. Blocking the sunlight is the answer, but building a permanent cover for a huge reservoir is very costly. The solution for LA-area reservoirs, a few years ago: cover the entire water surface with millions of floating "bird balls"
, in effect turning the reservoir into a 10+ acre ball pit.
The company that makes the balls switched production over entirely to this monster order, shipping in batches of a few hundred thousand balls at a time (which were to be dumped in as they were received) until the full order of 6 million balls was in. This all began in 2008, but I don't know what the updates are.
still more pics
Griffith Park Blog coverage (raises objections about whether the plastic is safe when exposed to heat for long periods)