green trees near body of water during daytime

TOPEX Inc. Professional Civil Engineering & Land Surveying

Expert solutions for municipal, residential, and commercial projects.

Land Surveying throughout Oregon

Certified Water Rights Examinations to establish Claim of Beneficial Use

Civil Engineering Services in Oregon, Idaho, and Washington

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Civil Engineering

Municipal Services

Water Distribution, Water Treatment

Wastewater Collections, Wastewater Treatment

Stormwater Management

Transporation Design Services, Roadway Design, ADA Compliance

Residential/Commercial Services

ODOT Permitting, County Permitting, Driveway Certifications

FEMA Permitting, Elevation Certificates

Retaining Wall Design, Site Design, Right-of-Way permitting,

Topographic Surveys

Photogrametry Drone Surveys

Boundary Surveys

Plat Partitions, Lot Line Adjustments, Subdivision Layout, Surveys of Record

Easements

ALTA/NSPS Surveys

Construction Stakeouts

As-built Surveys

Utility Surveys

Bathymetry Surveys

Pre-Design Surveys

Cost-effective water rights and transfer examination services for claims of beneficial use

Land Surveying

Need Water Rights?

About TOPEX Inc. Engineering & Land Surveying Services

TOPEX Inc. is a small engineering & land surveying firm based in Oregon, led by Chris Janigo, PE, PLS, CWRE. With more than a decade of experience in Oregon and professional licensure in Oregon, Washington, and Idaho, we bring a multidisciplinary approach to civil engineering, land surveying, and water rights examiner consulting.

Our clients benefit from the responsiveness and attention to detail that comes with working directly with a licensed professional. We focus on delivering high-quality work that’s both practical and cost-effective, backed by deep local knowledge and regional experience working with local counties, special districts, and municipalities while coordinating regularly with state and federal regulatory agencies.

Whether we’re working with public agencies, private landowners, or developers, our goal is to provide sound, efficient solutions rooted in technical expertise and a clear understanding of each client’s needs. We pride ourselves on honest communication, reliable service, and professional results—regardless of project size or scope.

At TOPEX Inc., we value long-term partnerships and strive to exceed expectations by consistently delivering work that reflects a strong commitment to quality, integrity, and client satisfaction