The following is a sample of the companies
Spanwell proudly provides products and services to.

AmerenEnergy
American Chemet Corporation
Arizona Electric Power
Barrick Goldstrike Mine
Basin Electric Power Corporation
Burlington Northern Sante Fe Railway
Ceco Concrete Construction
ConocoPhillips Company
Eveready Industrial Services Corporation
ExxonMobile Global Services
First Energy Generation Corporation
Great River Energy
Lower Colorado River Authority
Montana Sulphur and Chemical Company
North American Energy Services Company
PPL Generation LLC
PPL Montana LLC
PacifiCorp
TXU – Texas Utilities
Saskatchewan Power Corporation
Tri-State G. & T. Association
W. G. Yates and Sons Construction