About

Mr. Mathes has over 22 years as a natural resource biologist with extensive experience with wetland and stream delineations for federal regulatory permits for a wide range of Clients.  Delineations have been conducted in accordance with U.S. Army Corps of Engineers (USACE) 1987 Wetland Delineation Manual methodologies and include project-specific use of the Eastern Mountains and Piedmont, Atlantic & Gulf Coast Plains, Arid West, Western Mountains, Valleys, and Coast, Midwest, Great Plains, and Northcentral and Northeast Regions Regional Supplements.  

Mr. Mathes has performed wetland classification and functional assessments using Cowardin’s Classification of Wetlands and Deepwater Habitats of the United States, Rosgen’s Level I Stream Classification, Strahler's stream order, Brinson’s Hydrogeomorphic (HGM) Approach, Ohio/Texas/Michigan Rapid Assessment Method for Wetlands (RAM).  Furthermore, Mr. Mathes has conducted quantitative stream assessments using the Qualitative Habitat Evaluation Index (QHEI), the Headwater Habitat Evaluation Index (HHEI), and the North Carolina Division of Water Quality “Methodology for Identification of Intermittent and Perennial Streams and Their Origins”.

Additional project experience includes authoring Environmental Assessments (EA) and Environmental Impact Statements (EIS), Federal Emergency Management Administration (FEMA) flood risk/hazard assessments using HEC-RAS modeling, and developing and implementing compensatory mitigation plans and invasive species monitoring and control programs. Permitting experience includes: Sections 401 and 404 of the Clean Water Act; Section 10 of the Rivers and Harbors Act; National Pollutant Discharge Elimination System (NPDES); Sections 7 and 10a of the Endangered Species Act (ESA).  

In addition, Mr. Mathes serves as resource and technical lead conducting Geographical Information System (GIS) desktop studies for T&E species habitat suitability assessments and application of remote sensing technologies for the identification of potential ecological sensitive receptors along inland and coastal habitats. Geospatial technical expertise includes ecosystem GPS data collection and GIS mapping using ESRI’s ArcGIS ArcMap v10x, geoprocessing tools, 3D/Spatial Analyst extensions (DEM and LIDAR processing). GPS hardware proficiency includes Trimble GeoExplorer and R1 receivers and highly skilled using Trimble’s Pathfinder Office, and ESRI’s Collector/Field Maps and Survey 123 mobile applications.