City of Chicago Green Alley was uploaded to Flickr

If Mayor Emanuel loses the upcoming election, will the City have to replace all these concrete slabs?

Snark aside, this program seems like a positive step…

Chicago’s Green Alley program is one of many environmentally friendly initiatives put forth by CDOT.

Green alleys incorporate a variety of characteristics:

Permeable pavements (asphalt, concrete or pavers) that allow stormwater to filter through the pavement and drain into the ground, instead of collecting on hard surfaces or draining into the sewer system. The pavement can be used on the full width of an alley, or simply in a center trench.
Open bottom catch basins–installed in alleys to capture water and funnel it into the ground
High-albedo pavement, a lighter-colored surface that reflects sunlight instead of absorbing it, helping reduce the urban heat island effect
Recycled materials, such as concrete aggregate, slag and recycled tire rubber

Other green alley techniques include using proper grading and pitch to facilitate drainage, and using dark sky-compliant light fixtures to reduce light pollution and provide uniform illumination.

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I took City of Chicago Green Alley on May 03, 2014 at 01:53PM

and processed it in my digital darkroom on May 26, 2014 at 04:35PM