BEFORE & AFTER:
Two alleys in downtown Boise are the first locations for installation of permeable pavers by the county highway district.
Photos: Ada County Highway District

For the first time, the Ada County Highway District has installed permeable pavers in downtown Boise, Idaho. The pavers will go in two downtown alleyways, one between 3rd and 4th streets north of Main Street, and one between 13th and 14th streets north of Main. The alleys typically puddle water.

ACHD spokesman Nicole Pineda told the Idaho Statesman the preparation for the pavers included digging out the space, pouring a cement border, then adding layers of aggregate and gravel. The pavers are gapped with gravel to infiltrate stormwater.