O’Connor Environmental, Inc.

Geomorphology ▪ Hydrology ▪ Engineering Geology

P.O. Box 794, Healdsburg, CA 95448    (707) 431-2810   

Regulatory Response and Permits

· CEQA/NEPA Environmental Impact Analyses

· Cal. Dept. of Forestry Timber Harvest Plan Geology Reports

· Washington Department of Natural Resources / Cal. Dept. of Fish & Game 1600 Permits-Streambed

· Alteration Agreements & Enforcement Response

· Cal. Regional Water Quality Control Board Permits & Enforcement Response

· Sonoma County  Groundwater Reports  

· Water Scarce Areas

· Napa County Hydrology & Geology Reports

· US Army Corps of Engineers-Clean Water Act

· Sec. 401/404 Wetlands & Waters of the US

Fluvial Geomorphology

· Stream condition assessment

· Habitat & channel restoration planning

· Aquatic habitat analysis-salmon & steelhead

· Monitoring of erosion and sedimentation

· Sediment transport analysis

 

Hydrology

· Hydrogeologic (groundwater) assessment

· Stream & spring flow measurement

· Channel capacity and hydraulics

· Water balance/availability assessment

· Water rights

· Reservoir management

 

Watershed Science

· Cumulative effects analysis

· Sediment budgets

· Riparian zone planning & management

· Monitoring program design

· Statistical analysis of monitoring data

 

 

 

 

GIS and Mapping

· Custom mapping and analyses

· Land surveys using total station and GPS

· Field surveys using custom electronic field forms and GPS

· Hydraulic surface analysis from Digital Elevation models

· Database design and management (Access or ArcMap)

 

Hydrologic Modeling

· Distributed hydrologic modeling

· Floodplain and flood hazard 

· Surface water / groundwater interaction

· Water balance and water supply

· Use of HEC-RAS, MODFLOW, GSSHA, MIKE SHE and other modeling software

 

Engineering Geology

· Timber harvest plan geologic review

· Slope stability assessment

· Erosion source assessment & mitigation

· Stream bank stabilization

· Floodplain encroachment analysis

Our Services

Office Location: 447 Hudson St.          Mailing Address: PO Box 794,  Healdsburg, CA   95448                        Ph (707) 431-2810       Fax (707) 473-9050   

Text Box: OEI specializes in analysis of land management influences on water resources, aquatic habitat and geomorphology. This requires application of our expertise in geomorphology, geology and hydrology in a variety of environmental settings ranging from large rivers to small ephemeral channels to hillslopes. The approach to each project is developed with particular attention to specific project objectives and constraints. OEI has completed projects for a variety of public and private clients over the last 14 years. Public-sector clients include water agencies, resource conservation districts, and state regulatory agencies. Private clients include timber companies, ranch owners, vineyards, and other engineering and environmental firms. Below is a list of our services with a brief list of work products for each discipline. Please click on the corresponding link above for greater detail regarding our expertise and previous work experience in any of these categories.

OEI Project Locations

Central and Northern California

Home | Our Services | Modeling | Fluvial Geomorphology | Hydrology | Engineering Geology | GIS | Regulatory Permits | Watershed Science | Contact Our Staff

Watershed Studies Conducted by OEI in                   Montana, Idaho, Washington, Oregon and California
Text Box: OEI Watershed Studies