Holdrege & Kull – Consulting Engineers and Geologists has provided construction quality assurance (CQA) services on thousands of projects since the company was founded. Our CQA services include construction observation, special inspection, and materials testing services, both in the laboratory and the field. We perform inspection services on a variety of projects, from simple foundations to multi-story buildings requiring extensive structural steel and concrete inspection. We have provided testing and observation services on thousands of grading projects, from simple driveway fills to one-million-cubic-yard mass grading operations. Our accredited laboratories complement our field services by performing testing of soil, aggregate, concrete, grout, mortar, and steel samples collected at the project site.