Officials in charge of widening Interstate 93 have run into a problem they didn't anticipate.
It could take more than 160-tons of road salt each year to keep the additional lanes between Manchester and the Massachusetts border clear of ice in the winter.
D-O-T needs to show that the additional salt won't degrade the water in nearby streams.
But recent testing shows that streams adjacent to I-93 -- based on the amount of salt they contain -- are already in violation of federal clean water standards.
New Hampshire Public Radio's Doug MacPherson reports.
