MDU Resources Group Inc. said Dec. 18 that its construction businesses have a record combined backlog of $1.6 billion as of the end of November, compared to a $1.1 billion backlog at the same time in 2017.

Construction services subsidiary MDU Construction Services Group Inc. had a 34% year-over-year increase in backlog to $929 million as of Nov. 30, compared with $694 million as of Nov. 30, 2017.

MDU's construction materials arm, Knife River Corp., booked a backlog of $681 million as of Nov. 30, up 58% from $430 million as of Nov. 30, 2017.

"In addition to capturing and successfully performing more work, we expect to continue growing through acquisitions in 2019," MDU Resources President and CEO David Goodin said.