Welcome to Holdrege & Kull - Consulting Engineers and Geologists

Geotechnical | Environmental | CQA | SWPPP | Geology & Hydrogeology

Geotechnical Engineering icon

Geotechnical Engineering

Providing Geotechnical and GeoEnvironmental Engineering services in California, Oregon, Nevada, Utah, Arizona, Hawaii, and Maryland.

Environmental Consulting icon

Environmental Consulting

Specialists in hazardous materials site characterization and remedial design.

CQA icon

Construction Quality Assurance

Certified by Caltrans, ACI, AASHTO, AWS, ASNT, CCRL, CCTIA, DSA, ICC, NICET, and OSHA.

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Qualified SWPPP Developers/Practioners providing regulatory compliance, monitoring, design and mitigation.

Geology & Hydrogeology icon

Geology & Hydrogeology

Geologic hazards evaluation, mapping, fault studies, geophysics, groundwater modeling and hydrogeology studies.



Since 1993 H&K has provide¬†geotechnical and geoenvironmental engineering, materials testing and special inspection, geology, hydrogeology, and SWPPP services throughout the western United States. H&K’s professional staff are registered as Professional Geologists, Civil Engineers, Engineering Geologists, Geotechnical Engineers, Hydrogeologists, Professionals in Sediment and Erosion Control, and Qualified SWPPP Designers and Practitioners. We maintain a deep bench of qualified engineering field and laboratory technicians, and our laboratories are accredited by DSA, Caltrans, CCRL, AASHTO, ASTM, and the U.S. Army Corps of Engineers.


GoogleEarth and drone video tour

Download our Statement of Qualification >>> Holdrege & Kull 2015 Statement of Qualifications.pdf (3.6 MB)

American Society of Civil Engineers logoNEWS: H&K’s Founding Principal, Mr. Chuck Kull, receives the Francis N. Hveem Award for Geotechnical Engineering from the Sacramento Section of ASCE on September 16, 2014:

H&K received the 2013 Geotechnical Project of the Year Awards from  ASCE , APWA  and ACEC California for a micro-pile foundation design that saved Butte County $300,000 in construction cost for the Bloomer Hill Communications Tower.

"H&K's staff, innovation and out-of-the-box thinking is what the tax payers of Butte County and California deserve". Ms. Weedy Hannibal - Butte County Telecommunications Manager.


Keywords for this page include: Geotechnical | Environmental | CQA | SWPPP | Geology | Hydrogeology



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Client Oriented - Solution Driven - Since 1993