Chicago has around 400,000 homes with lead service lines. Although the city has made EPA's safe drinking water standard, the homes tested mostly belong to employees and retirees from the water management department and the voluntary replacement program is not funded beyond 2021.

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.