USH 12 Middleton Bypass | Middleton, WI

Green Alley Reconstruction

Client: City of Dubuque
Location: Dubuque, IA


The City of Dubuque is using funding through Iowa's State Revolving Fund to help cover the costs of this massive alley conversion project.

The City of Dubuque is using funding through Iowa's State Revolving Fund to help cover the costs of this massive alley conversion project.

 The City of Dubuque has made the ambitious decision to reconstruct 73 existing alleys between 2014 and 2016 using permeable pavement surfaces. The goal behind this initiative is to reduce the volume of stormwater in the watershed and to prevent polluted runoff from reaching the Mississippi River. Over the course of the next 20 years, the City expects to convert approximately 240 existing alleys to green alleys. These reconstructed alleys are expected to reduce stormwater runoff within the Bee Branch Watershed by as much as 80%.

MSA developed a calculation tool specific to the Green Alley program that the City could then use to evaluate the effectiveness of each alley system, based on location, development density, alley dimensions, and a number of other factors. Our team has also designed and constructed more than 15 of the 73 alleys slated for reconstruction.

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