Hydrology & Hydraulics -Hydrogeology - Geomorphology
Hydrology & Hydraulics
Watershed Modeling & Planning
Stream Restoration
Fish Passage Improvement
Flood Hazard Mitigation
Groundwater Availability
State Water Rights
Engineering Support Services
CEQA Analysis and Permitting
Expert Witness Services
OEI is committed to finding practical, scientifically rigorous, and innovative solutions to help address a wide variety of water and natual resource management issues facing our clients and our communities