County judge allows restart but orders more documentation from owner Enbridge to state and federal officials on repairs to damaged east leg before it can reopen.

Dam owners, state and local authorities must do a better job of understanding the history of the dams in their inventory as well as preparing for ice runs that could destroy dams like Nebraska's Spencer Dam, which collapsed under the weight of heavy rain combined with cold temperatures and frozen ground last spring.

Responding to and preparing for climate change is a huge driver of environmental work globally, according to several firms in the sector.