21st Street for the 21st Century

by Andy Rowe, P.E., Senior Associate Engineer; Cannon, San Luis Obispo, CA,
Larry Kraemer, P.E., Director of Public Infrastructure; Cannon, San Luis Obispo, CA,

Serial Information: Civil Engineering—ASCE, 2015, Vol. 85, Issue 5, Pg. 72-77,81

Document Type: Feature article


In making improvements to a key roadway, the City of Paso Robles, California, implemented measures to retain and treat storm-water runoff and enable it to infiltrate into the ground. The infiltration will recharge groundwater supplies and reduce flooding. By incorporating features for traffic calming, urban development, water quality, and water supply, the 21st Street Improvement Project offers a model for other cities looking to achieve similar objectives.

Subject Headings: Streets | Water supply | Water quality | Hydrologic models | Infiltration | Municipal water | Urban areas | Traffic models | Highways and roads | North America | California | United States

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