Dr. Weaver has over 27 years of professional experience in the fields of process geomorphology, surface water hydrology, watershed management, and engineering geology. Since forming Pacific Watershed Associates, his work has focused on forest geomorphology, and the hydrologic and cumulative effects of land management on forested watersheds and wetlands ecosystems.
Mr. Hagans has extensive experience in conducting large scale, basin-wide erosion inventories and assessments, as well as implementing watershed rehabilitation and restoration projects in Northern California and elsewhere. Since joining Pacific Watershed Associates in 1990, Mr. Hagans has managed and conducted a variety of projects related to wildland hydrology and erosion processes, including sediment source assessments of over 2000 mi2 of managed forest land and erosion inventories and sediment reduction plans for literally thousands of miles of wildland forest roads, ranch roads, rural subdivision roads, vineyard roads, parkland roads, and county maintained public roads throughout California.
Ms. Weppner has extensive experience in designing and conducting geomorphic and geologic assessments, including watershed assessments and watershed analysis, erosion inventories, erosion control projects, field surveying, and stream channel mapping. She provides the quality control and quality assurance of Pacific Watershed Associates data management and scientific analysis.
Mr. Lew is an associate geologist with extensive experience in geologic and geomorphic investigations leading to related remediation and mitigation projects throughout Northern California. His work experience has emphasized applied geomorphic investigations that result in development of erosion control and erosion prevention plans for federal, state and private landowners. He has overseen multiple watershed sediment source assessments and supervised large-scale erosion remediation projects. Additionally, Mr. Lew has extensive experience in the development of Storm Water Pollution Prevention Plans (SWPPPs). He is a qualified SWPPP Developer/Practitioner (QSD/QSP) and is a California Stormwater Quality Association certified Trainer of Record (ToR) for required QSD/QSP coursework.
Mr. Leroy specializes in watershed analysis and erosion control, Holocene stratigraphy, and coastal geomorphology . His experience with Quaternary geology and geomorphology studies also includes Seismic hazard assessment, neotectonics, landslide and sediment source inventory, and environmental restoration.
Ms. Moley has been Project Geologist and Division Leader of the Environmental Division at Pacific Watershed Associates, Inc. since 1998. Her extensive experience in subsurface geologic characterization and septic design provides clients with custom solutions to difficult development issues. She also is an expert in tsunami mitigation strategies and is an active participant in geologic hazard community planning and education.
Mr. Kraemer specializes in Watershed analysis and hydrology. He has extensive experience interacting with diverse landowners across state lines and brings effective solutions to sediment control, road upgrading, and hydrologic monitoring projects.
Ms. Zuroweste is the program manager for the Santa Rosa (North Bay) office of Pacific Watershed Associates. She established the Environmental Division at the North Bay office in 2008. She specializes in commercial and residential development and watershed analysis. Her extensive experience in subsurface geologic characterization and septic design provides clients with innovative, cost-effective, and environmentally friendly solutions to difficult development issues. Ms. Zuroweste is also a certified CGP QSD/QSP Trainer of Record.
Mr. Herbst geologic studies have focused on watershed analysis and wildland geomorphology. Additionally, his earth science proficiency includes geologic and geomorphic mapping, water quality monitoring, and geomorphology.
Mr. Hughes’ geologic studies have focused on watershed analysis and wildland geomorphology. Additionally, his earth science proficiency includes aerial photo analysis of geology and mass wasting features, geologic and geomorphic mapping, road-related watershed analysis, and geomorphology.
Mr. Flynn has extensive experience in geologic and geomorphic analysis as they relate to land management. His experience is primarily in THP development, road-related watershed analysis, and geologic mapping.
Mr. Gilkerson has experience in hydrology, erosion control, and marine ecology. He has performed water quality and contaminant monitoring, and has overseen the construction of large-scale erosion control projects. He has also conducted eelgrass habitat investigations and estuarine modeling studies for regulatory compliance and conservation interests.
Mr. Bissell has many years of GIS experience specializing in analysis and mapping for wildland and urban planning. His research interests span a wide range of GIS topics including: geography. cartography, and geomorphology, but currently focus on watershed analysis, geo-archeology, and restoration planning.
Ms. Butler has experience in geologic studies involving Quaternary soil geomorphology, geotechnical investigations, soil analysis, and watershed assessment. She currently specializes in road-related erosion control with a primary focus on heavy equipment supervision as it relates to road upgrading and decommissioning.
Mr. Martin has broad experience in environmental geology, geotechnical investigations, and watershed assessment. He currently specializes in road-related erosion control with a primary focus on road related sediment source investigations and heavy equipment supervision as it relates to road upgrading and decommissioning.
M.B.A., Financial Manager
Ms. Cottone has over three decades experience in the field of business management and accounting. She is responsible for managing financial processes, providing a broad range of accounting, analytical, and administrative functions. She also provides risk management, human resource services, and supervision of the administrative staff.
Ms. Kopp has a background in geologic and geomorphic mapping, knowledge of local geology, geological principles and practices including hydrology, and physical geology. She has experience in conducting field-based watershed assessments with a focus on road-related erosion control and sediment reduction. She is also involved in soil analysis for septic and leachfield design and development.
Mr. Moore specializes in construction and design of in-stream fish habitat and riparian enhancement projects. He has conducted numerous fish habitat enhancement projects including, constructed log jams as well as bioengineered stream bank stabilization. He also has extensive experience in eelgrass and estuary habitat restoration in Central and Southern California.
Mr. Thoele has experience conducting watershed assessments and assisting with road decommissioning project layout and design as well as eelgrass surveys. His background includes botanical restoration work in alpine meadow habitat in Yosemite National Park.
Dr. Hemphill-Haley is a former researcher with the USGS specializing in coastal and marine geology, micropaleontology, and paleoseismology. She collaborates with Pacific Watershed Associates staff on coastal paleoseismic research projects.