There are two highway weigh scales in the Northwest Territories for commercial vehicles: 

Highway 1 (from Alberta)

This scale is 84 kilometres from the NWT/Alberta border.
Address:
Enterprise Weigh Scale
76 Capital Drive, Suite 201
Hay River, Northwest Territories, X0E 1G2
Phone: (867) 984-3341
Fax: (867) 984-3401

Highway 8 (from Yukon)

This scale is located 6 kilometres south of the town of Inuvik.
Address:
Inuvik Weigh Scale
P.O. Box 2038
Inuvik, Northwest Territories, X0E 0T0                    
Phone: (867) 777-7283
Fax: (867) 777-4265 

Click here for information on commercial permits and fees.
Click here for the current highway weight restrictions.