Ehrhart Griffin & Associates
3552 Farnam Street
Omaha, Nebraska 68131
ph (402) 551-0631
fax (402) 551-6540

Ehrhart Griffin & Associates
300 North Dakota Avenue Ste: 114
Sioux Falls, South Dakota 57104-6051
ph (605) 339-7215
fax (605) 339-7271

Former Erie, Colorado office:

Surveying: Integral Surveying

Engineering:
Brown Civil Engineering
PO Box 930
Erie, CO 80516-0930
303-828-3340 ext. 10
303-828-3418 fax