Spanwell proudly provides products and services to:

24 Hour Safety, Corpus Christy, TX
3M Company
AC Power
Alcoa, Inc.
Alliant Energy
AmerenEnergy
American Chemet Corporation
American Electric Power
Amgen
Applied Industrial Technologies
Arizona Electric Power
ATCO Alberta Power
AWS Arc Welding Specialist
Aquilex
Barrick Goldstrike Mine
Basin Electric Power Corporation
Bellisio Foods
Black and Company
Boeing Company
BMW Constructors, Inc.
Border States Electric
Burlington Northern Sante Fe Railway
Canexus Limited Canada
Cape Towing Caribbean
Ceco Concrete Construction
Chemco Electrical Company
Chevron Phillips Chemical Co.
Coblaco Services
Colorado Energy
Commonwealth Construction, Canada
ConocoPhillips Company
Constellation Energy
Covanta Energy
Curbell Plastics
Dealers Electrical Supply
Delafield Corporation
Disney Resorts
Drago Supply
Edenderry Power, Ireland
Enerfab, Inc.
Entergy
EnviroVantage Inc.
Eveready Industrial Services Corporation
ExxonMobil Global Services
Fastenal
F & M Mafco
First Energy Generation Corporation
FMP Furnace Mineral Products
Genon Potomac River, LLC
Gescan Division of Sonepar Canada Inc.
GMCS, G. Moss Consulting & Sales, Atlantic Canada
Great River Energy
Growers Ice
Halliburton
Hess Corporation
Hickory Mountain Chimney & Masonry
Hytex 85 Inc. Canada
Imperial Oil Company, Canada
Inland Industrial Supply, Canada
International Cooling Tower
Invista
Johnson & Johnson
KBR – Kellogg, Brown & Root, Canada
K & D Pratt Company
Kusey’s Electric, Canada
LG Constructors
Lonza Biologic
Lower Colorado River Authority
Luminant Generation Company
Luzenac America
M. Industrial Mechanical
Martek Bioscience
MDU Montana-Dakota Utilities
Midwest Generating Station
Minnesota Power
Mitech Controls
Montana Sulphur and Chemical Company
New Brunswick Power Co.
NewMech Companies Inc.
NOAH - Okeanos Explorer
Nooter Construction
Northfield Block Company
NAES Power Contractors, Eastern Division
NAES Power Contractors, PMRI Division
Otter Tail Power Company
Owens Corning
Pacific Industrial Supply
Pioneer Pipe Co.
PPL Generation LLC
PPL Montana LLC
PacifiCorp
Phillip Services Corporation
Pioneer Pipe
Pipeline Supply & Service Co.
Prairie Mine & Royalty Ltd., Canada
Prince Incorporated
R&M Electrical Group Ltd., United Kingdom
Reis Environmental
Rubicon, Inc.
Rumsey Electric Supply
S&S Supplies & Solutions
SGL Group, The Carbon Company
Safety West Inc., Edmonton, AB 
SASK Power Corporation
Scheck Mechanical Corp.
Seaboard Industrial Supply Co. Ltd., Canada
Shell Canada
Springfield Paper Specialties 
Sutton-Garten Co., Indianapolis, IN
Syncrude Ltd. Canada
TC Electric, NY
TIC of Wyoming
TIMEC
TISI Team Industrial Canada
TMW Global
Torry Plastics America Inc.
Tri-State G. & T. Association
Turner Supply Co.
Union Electric Co. 
U.S. Coast Guard Cutter, Seneca
W. G. Yates and Sons Construction
Welding Services, Inc.
Wilson Supply Company