1. Graduate Research Associate, IIHR-Hydroscience and Engineering, Univ. of Iowa, Iowa City, IA 52242.
2. Associate Professor, IIHR-Hydroscience and Engineering, Univ. of Iowa, Iowa City, IA 52242 (corresponding author).
3. WSDOT Transportation Engineer 2, WSDOT, 401 Second Ave. South, Suite 300, Seattle, WA 98104-2862.