The Cotner Junk: 1421 – The Year China Discovered the World

The Cotner Junk: 1421 – The Year China Discovered the World

GPR Data LLC was contacted by Dave Cotner Senior from Lakeside, Oregon in April of 2007 with regard to geological investigation of a buried Chinese Junk that was deposited on the Oregon coast in the early 1400’s by a tsunami originating off the coast of New Zealand....
El Dorado Hills Irrigation District Reclamation Facility

El Dorado Hills Irrigation District Reclamation Facility

With significant site upgrades coming soon, it was crucial for the El Dorado Hills Irrigation District to have accurate maps of all buried utilities and potential risks. With site hazards such as chlorine gas piping, blind excavation was simply not an option for...
Post-Tension Cables in a High Traffic Parking Garage

Post-Tension Cables in a High Traffic Parking Garage

Objective: Locate terminal ends and attached “add-on cables” for several 3rd-floor post-tension cables. Note areas of probable cable failure. Evaluate northern segment of two cable bundles on the 4th floor, each of which is accompanied by excessive cracking in the...