NDT Investigation

NDT Investigation at the Cheops Great Pyramid at Giza, Egypt with Impact Echo testing with a remotely-operated Concrete Thickness Gauge mounted on an iRobot tracked robot to test a stone door in an air shaft in Great Pyramid, as shown in a National Geographic's television special that aired in September of 2002.

Dam Safety Evaluations

Dam Safety Evaluations of Concrete, Masonry, and Embankment Conditions with engineering geophysical methods (including refraction, surface waves, crosshole/downhole) and NDT methods (including impact echo and radar methods on appurtenances) both nationally and internationally.

Regional Transit District

Southwest Corridor structural condition assessment of 10 box girder bridges for concrete placement and consolidation problems, and continued NDT assessment of bridge foundation elements for each new alignment of the RTD Light Rail system in Denver, Colorado.

Wind Farm Investigations

Investigations for foundation design using geophysical methods such as seismic, electrical resistivity and/or electromagnetics. These investigations range from small- to large-scale wind farms with projects performed in Washington, Oregon, Texas, New Mexico, Kansas, North Dakota, Nebraska and Colorado.

Pilot Technology Transfer Project

In Joint Venture (JV) with Ultra Technologies in New Delhi, India for the Nondestructive Evaluation of Unknown Bridge Piers and Abutments, presented to personnel from the Northern Railways of Indian National Railways, New Delhi, India.

Indiana Toll Road (Interstate 90)

Structural Condition Assessment and Repairs Consultation for eight 50-year old bridges along the toll road in Gary, Indiana. Investigated the integrity of concrete decks, steel girders, columns and beams, concrete piers and abutments, and timber, concrete, monotube and steel piles.

Tara Mandala Groundwater Investigation

Purpose: Remote Buddhist monastery located in the Rocky Mountains of southwestern Colorado needed a potable groundwater resource, servicing more than 100 staff, volunteers, and visitors during the height of their retreat season.

Objective:  Provide subsurface imaging of the geologic structures (e.g., faults) in order to recommend a single well location that: 1) could generate at least 30 GPM of potable water, and 2) is within 400 feet of the ground surface.

Method: Two seismic reflection lines, each ~950 feet long, oriented to traverse regional extensional features (i.e., normal faults) and interpret their structural attitude. Extensional structures were targeted for this project because regionally these geologic features are most likely to have antithetic features (i.e., fracture zones) which yield groundwater due to secondary porosity.

Data Acquisition: A four-man seismic crew with 16-pound hammer source performed the reflection survey in rugged, mountainous, forested terrain over the course of two days.

Interpretation: Seismic reflection amplitude/time sections indicated four steeply-dipping normal faults, which form a small ‘graben-within-graben’ structure. The position for a new well was selected based on access, hydrologic gradient, and anticipated intersections with fracture zones within inner graben (i.e., associated with Fault B).

Result: A well was drilled in early 2014. It encountered an artesian potable water resource flowing at ~75 GPM in a fracture zone about 190 feet below the ground surface! This well continues to supply Tara Mandala with ample water under artesian pressure.

FHWA SHRP2 IAP (active)

Olson is the Subject Matter Expert (SME) for FHWA’s SHRP2 Implementation Assistance Program for 2014-2017.  The SME role involves two products: 1) R06A Nondestructive Testing of Concrete Bridge Decks; and, 2) R06G Nondestructive Testing of Tunnels.  Ten state DOT’s are involved to implement NDT technologies developed under SHRP2 with R06A and R06G products.