A proposed ballot initiative would block construction of some new oil pipelines in North Dakota.
The measure is being promoted by opponents of the Keystone oil pipeline.
TransCanada Corp. of Calgary, Alberta, is developing the pipeline to transport Canadian crude to refineries in the Midwest. Its proposed route goes through eight eastern North Dakota counties.
TransCanada hopes to have the line's 218-mile North Dakota segment finished by fall.
The proposed ballot measure would bar construction of a new North Dakota oil pipeline if its route is within six miles of a lake or aquifer that supplies water to more than 5,000 people.
The measure exempts pipelines needed to develop North Dakota oil wells.Associated Press
