Robert Annear, Ph.D., P.E.

Robert Annear is a Senior Principal Water Resources Engineer based in Oregon with more than 20 years of experience focused on the development and calibration of hydrodynamic and water quality models for local, state and federal agencies, law firms, and clients in the mining, paper, aviation, hydropower, and water supply sectors.

Robert Annear is a Senior Principal Water Resources Engineer based in Oregon with more than 20 years of experience focused on the development and calibration of hydrodynamic and water quality models for local, state and federal agencies, law firms, and clients in the mining, paper, aviation, hydropower, and water supply sectors.


Rob specializes in guiding clients through environmental permitting at the federal, state, and local levels. He also conducts assessments of complex surface water systems for Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) and Resource Conservation and Recovery Act (RCRA) sites; prepares natural resource damage assessment (NRDA) studies; and helps clients meet total maximum daily load (TMDL) requirements. He frequently consults on challenges related to multi-objective water quality management for municipal water supplies, fisheries, and recreational uses. He assists clients with conducting climate change studies and source water protection planning studies.

Rob's experience includes developing and calibrating 1-D, 2-D, and 3-D hydrodynamic, sediment transport, and water quality models of reservoir, riverine, estuarine and coastal systems.  He is engaged in hydrologic studies to support flood modeling, inundation mapping and assessing water availability. Rob's experience also includes hydraulic analyses to support conceptual and full design of infrastructure and support flood routing analyses.

He has conducted numerous peer reviews of surface water models for agencies such as the U.S. EPA, the U.S. Bureau of Reclamation, the Oregon Department of Environmental Quality, and the Washington Department of Ecology. He also has aided clients in the relicensing of hydropower facilities through the Federal Energy Regulatory Commission. On multiple occasions Rob has provided litigation support on matters involving hydrology; water rights; and hydrodynamic, sediment transport and chemical fate and transport modeling. He also has performed climate change impact studies and modeling to support long- and short-term planning efforts.

Rob has served as an adjunct faculty member in the Civil and Environmental Department at Portland State University, where he teaches undergraduate and graduate courses in water resources engineering, urban watershed hydrology, and temperature modeling. He has led water quality modeling training workshops and serves on the department's master's thesis committees. In addition, Rob is a reviewer for various water resource and hydrologic journals and has served on national water quality grant review panels for the U.S. EPA.

Contact Robert Annear at This email address is being protected from spambots. You need JavaScript enabled to view it. or +1-503-222-9518.

Career Summary of Robert Annear, Ph.D., P.E.

  • Specialties: hydrodynamic and water quality modeling, watershed and hydrology studies, drinking water studies, stormwater management, water and natural resources conservation and restoration, regulatory compliance, hydrodynamic and sediment transport modeling
  • Practice Areas: Contaminated Site Assessment and Cleanup, Water and Natural Resources, Geotechnical and Geoenvironmental Engineering
  • Disciplines: Environmental Engineering, Natural Resources and Ecological Sciences, Water Resources Engineering
  • Education: Ph.D., Civil and Environmental Engineering, Portland State University, 2007; M.S., Civil Engineering, Portland State University, 1997; B.S., Aerospace Engineering, Boston University, 1993
  • Registration: Professional Engineer, Oregon No. 53757PE; Idaho No. 14190; Washington No. 46812; Florida No. PE71806; North Carolina No. 049422

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