Hans R. Hadley

Hans R. Hadley, PE, LG, CFM, leads operations for the Salem, Oregon, office of WEST Consultants, Inc. He has over 23 years of experience in hydrology, hydraulics, river mechanics, geomorphology, and sediment transport. He is a registered Professional Engineer in the states of Oregon and Washington and a Licensed Geologist in the state of Washington. His work at WEST includes stormwater needs assessments, designs, and master plans; Federal Emergency Management Agency (FEMA) flood insurance studies; litigation support; sediment transport studies; geomorphic assessments; and bridge replacement hydraulic designs.

Mr. Hadley supported the City of Salem in the development of an updated stormwater master plan which included the collection of survey data, the development of 1D and 2D modeling of the City’s three largest drainage basins, and the evaluation and prioritization of stormwater system improvement projects to support the City’s goal of reducing flood risk.

Mr. Hadley has conducted over 100 bridge hydraulic and scour evaluations for bridge replacements in Oregon and Washington. He has also worked on numerous FEMA projects, among them as lead project engineer for the development of a revised FEMA flood insurance study that included over 116 stream miles along 20 streams near the City of Vancouver in Clark County, Washington; over 30 miles along 18 streams in Gresham, Oregon; and over 21 miles along five streams in Clackamas County, Oregon.

Among his experience conducting geomorphic assessments, Mr. Hadley performed a geomorphic assessment and mitigations alternatives analysis for the City of Salem’s Geren Island water intake and treatment facility and a geomorphic study for the Fargo-Moorhead Flood Risk Management Project for the St. Paul District Corps of Engineers. He also conducted a sediment transport study for the N. F. Toutle and Cowlitz Rivers for the Portland District Corps of Engineers that included erosion of the debris avalanche created during the eruption of Mount St. Helens, sediment deposition behind the Sediment Retention Structure built by the Corps of Engineers, and sediment transport in the Lower Cowlitz River.

Mr. Hadley is active in the profession and community, with memberships in the American Society of Civil Engineers, the American Geophysical Union, the Geological Society of America, the Association of State Floodplain Managers, and the American Public Works Association. Additionally, Mr. Hadley has provided instruction throughout the U.S. in such courses as Streambank Stabilization for Restoration and Flood Control Projects and has authored over a dozen dam and reservoir water control manuals for the St. Paul and Seattle Districts of the Corps of Engineers.