Multech participated in the drainage study of Richmond Parkway for Section 1BS, 1BN, and Section1A for the City of Richmond, California. Project tasks included: rainfall-runoff modeling of roadway and cross drainage hydraulic analyses of drainage system consisting of storm drains, open channels, culverts, valves, and tide gates evaluation of existing drainage capacities and development of improvement alternatives. Computer models including HEC-1, HEC-2, and SWMM were extensively used.