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District 11 Innovation Newsletter
Blast from the Past!
Building of the Plank Road In this edition of “Blast from the past,” we share an issue from 1924 of the official publication of the California H ighway Commission. This issue shows views on the California State Highway in southern Imperial County, near the Mexican border, the trunk line to Yuma, and a description of the materials and techniques used in constructing the Plank Road. Click here to view the full document.
district11.onramp.dot.ca.gov/d11-innovation D11.Innovation@dot.ca.gov
