The photo is from existing 345kV and 500kV guyed tower foundations. Structures on the left are on a new 500kV circuit and those on the right are on a 20 year old 345kV circuit.
Structure-to-soil potential measurements on guyed anchors and tower foundations on the 345kV circuit showed that cathodic protection had failed on some of the towers due to incompatible selection of anode material for the soil environment. Other structures were not protected simply due to exceeding the useful design life of the anodes.
Recommendations were made for replacement anodes, where necessary on the 345kV circuit. A comprehensive cathodic protection design was furnished for the 500kV circuit.[...]
Earl Lawrence Kirkpatrick
It is with a heavy heart, deep sadness and grief that we acknowledge the following:
Earl Lawrence Kirkpatrick, founder and Chief Engineer at ELK Engineering Associates passed away Saturday, December 19, 2020 pursuing his passion for flying.
Details of the accident may be released at a later date.
Earl was a uniquely competent Engineer and a good man. His strong love and commitment to God, this country and his community have always been inspirational.
He will be greatly missed.
“Clear skies Earl.”
Earl L. Kirkpatrick
July 23, 1935 – December 19, 2020