Résumé

Partner, Rickon-Ehrhart Engineering and Construction Company, San Francisco, CA, c. 1907- . In 1907, the company had its offices at 1859 Geary Street in San Francisco. (See San Francisco-Oakland Directory, 1907, vol. 3, p. 693.)

Relocation

In 1907, Ehrhart lived at 1203 Gough Street in San Francisco, CA. (See Crocker Langley Directory Company's San Francisco City Directory. 1907, p. 567.)