AC Interference Projects

Contra Costa Water District
Los Vaqueros Pipeline Project, Concord, CA
Conduct a comprehensive induced AC Study for the Los Vaqueros Water Pipeline. This pipeline consists of approximately 25 miles of 74” to 106” diameter pipe which parallels and crosses several major high voltage transmission corridors in the Livermore to Antioch area. The purpose of this contract was to determine if steady state A.C. line loads and/or fault conditions would induce sufficient power into the proposed adjacent, parallel water pipeline to cause a significant hazard to the pipeline, to the power system or to personnel in the vicinity. Three different pipeline materials and/or coatings were evaluated.

Shea Homes of Northern California
Cypress Road Pipeline Project, Oakley, CA
Designed A.C. mitigation system for high voltage transmission crossings for a new 36” diameter water pipeline. A combination cathodic protection/stray current mitigation system was utilized which consisted of grounding mats at test stations, electrical isolation of pipeline sections and zinc grounding anodes running installed continuously with selected sections of the subject pipeline.

Ruggeri-Jensen-Azar Engineers
Bethyl Island Road Pipeline Project, Bethyl Island, CA
Designed A.C. mitigation system for high voltage transmission crossings for a new 36” diameter water pipeline. A combination cathodic protection/stray current mitigation system was utilized which consisted of grounding mats at test stations, electrical isolation of pipeline sections and zinc grounding anodes running installed continuously with selected sections of the subject pipeline.

Florida Gas Transmission
New Gas Transmission Pipeline Project, Central Florida
Assisted with computer modeling for a comprehensive induced AC study for a new gas transmission pipeline project in Florida for TEDEC/ENRON Pipeline Division. Scope of work consisted of in-situ soil resistivity modeling using the SES software package, collecting from utility companies with respect to tower to pipeline configuration, fault circuit information, grid station grounding, etc.

Grounding System Testing
Various Clients and Locations, San Francisco Bay Area
Performed resistance to remote earth tests using the fall of potential method for various building projects in the San Francisco Bay Area. Also, designed impressed current cathodic protection systems for building grounding grids for various silicon valley companies requiring strict grounding resistance values.

Concentric Neutral on URD Cables
Various Clients and Locations, United States
Conducted corrosion investigations and designed and tested cathodic protection systems for concentric neutral on URD cables installed at various locations throughout the United States. These systems consisted of impressed current cathodic protection systems.