Jonathan Elslager

Water Resources Engineer

Phone: 520.203.8636
JEF Office: Tucson
40 E. Helen St.
Tucson, AZ 85705
Ph: 520.623.3112
Fax: 520.623.3130


Applied Engineering

Specialized Services




Jonathan is a water resources engineer with over a decade of experience analyzing watersheds and designing surface water features for both flood control and environmental projects. His hydrologic and hydraulic experience includes channel, dam and levee design, rehabilitation and certification, stream restoration, scour and sediment transport studies, forensic flood investigations, hydrology reports, and FEMA submittals. This experience encompasses the application of computer/numerical modeling techniques to determine solutions to complex engineering problems in the areas of hydrology (HEC-1, HEC-HMS, FLO-2D, etc.), hydraulics (HEC-RAS, FLO-2D, etc.), and sediment transport (SAM, HEC-RAS, HEC-6T, Fluvial-12, etc.).

He combines proficiency in hydrology, hydraulic and sediment transport modeling, with added proficiency in GIS and CADD programs such as ESRI ArcGIS, Autodesk Civil3D, Bentley MicroStation & Inroads, to develop detailed graphical displays for incorporation into planning and design documents.

Jonathan also has substantial experience in development of final construction documents based on results of computer/numerical modeling including plans and project specifications.

When he isn’t working, Jonathan enjoys spending time outdoors with his wife and 3 children.

Professional Registration/Certifications

Professional Engineer, Arizona
Certified Floodplain Manager (CFM)
Member Arizona Floodplain Management Association
Member ASCE
Mine Safety & Health Administration (MSHA) Part 48 Certification

Academic Background

B.S., Civil Engineering, University of Arizona, May 2004