19

MDU RESOURCES G ROUP, INC.

as building, repairing and maintaining the infrastructure that

delivers and uses these energy supplies. We have been supplying

power to customers since 1924, and our utility business remains

the cornerstone of our corporation. The companies that make up

this part of our business earned $75.5 million in 2007.

$43.8

22%

$31.7

$27.8

$20.8

$20.1

$17.4

$15.0

$14.6

$6.2

07

07

03

04

05

06

03

04

05

06

$(5.6)

five-year earnings growth*

construction services

electric and natural gas

earnings

distribution earnings

(millions)

(millions)

* Compound annual growth rate, including the

Other category before discontinued operations

** Based on consolidated earnings before

discontinued operations