A comprehensive research program for the characterization of storm water runoff from an Arizona highway was conducted from January through December 2007. The study area covered a portion of the Loop 202 freeway west of Mesa Drive to a retention basin east of Lindsay Road in Mesa, Arizona. Storm water samples were collected from two storm water detention basins and a discharge point to the Salt River. The study was conducted by manually collecting storm water samples with passive automatic samplers and analyzing them for various roadway constituents. A primary objective of this research effort was to establish baseline values of constituents in ADOT highway runoff, aiding in the evaluation of related best management practices. A total of 16 storm water samples was collected from the research area between January 2007 and December 2007.

The deck of the Sunshine Bridge overpass, located westbound on Interstate 40 (I-40) near Winslow, Arizona, was replaced on August 24, 2005. The original deteriorated concrete deck was replaced using high performance concrete (HPC), reinforced with low-carbon, low-corrosion reinforcing steel. HPC is a new technology in Arizona. This report documents the first survey of the deck's condition and recommends that ADOT embark on a monitoring program to evaluate the performance of HPC. The ADOT monitoring program should consist of visual observation of the deck condition and concrete sampling and testing to measure and document HPC performance. The survey presented in this report was performed on December 18, 2007, which represents the first field survey since concrete deck placement. Visual observation and test results show the following: 1. The concrete has a very low chloride permeability. 2. The concrete has significantly slowed down and/or prevented chloride penetration through the bridge deck. 3. The average air-void parameters of HPC do not meet the industry standards for frost resistant concrete. 4. The deck surface appears to have minimal wear from snow removal equipment and shows no signs of concrete cracking. HPC appears to perform very well during the monitoring period despite the lower than recommended air void system. There were no signs of deterioration or adverse field conditions. It is recommended that bridge deck monitoring and concrete testing be done annually or biennially throughout the bridge's estimated 50-year service life to confirm long-term performance of HPC. It is also recommend that the next monitoring survey be initiated and conducted before the end of the year 2009.