This 2021 Edition of the Roadway Engineering Group Roadway Design Guidelines supersedes the 2012 Edition and incorporates the 2014 revisions along with several new revisions affecting bicycle and pedestrian accommodations, passing sight distance, barrier treatments, land and shoulder widths, fencing, design vehicles, and detours.
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The U.S. Department of Agriculture has approved $10 million to help pay for water projects in the farmlands of central Arizona, where growers are bracing for their supply of Colorado River water to be shut off.
But those funds, conditionally awarded this month by the Natural Resources Conservation Service, are still subject to negotiations between federal and state officials.
We, the U.S. Fish and Wildlife Service (Service), designate critical habitat for the western distinct population segment of the yellow-billed cuckoo under the Endangered Species Act.
This report summarizes the meteorological, nitrogen dioxide (NO2), sulfur dioxide (SO2), ozone (O3), and particulate matter (PM) data collected at the Resolution Copper Project near Superior, Arizona for the second quarter, April 1-June 30, 2015.
This report summarizes the meteorological, nitrogen dioxide (NO2), sulfur dioxide (SO2), ozone (O3), and particulate matter (PM) data collected at the Resolution Copper Project near Superior, Arizona for the second quarter, April 1-June 30, 2012.
