Size of St. Lawrence seaway limits traffic, trade   During
debate 55 years ago about U.S. participation in the St. Lawrence
Seaway project, a railroad industry representative testified
that as proposed, the system's locks and canals would be
inadequate the day they opened.  "The evidence is clear and
convincing that a 27-foot canal is already an obsolete and out-
moded waterway for ocean-going vessels," Gregory S. Prince, the
general solicitor for the Association of American Railroads,
testified before Congress as it considered the Wiley-Dondero Act
that would commit the United States to building two locks and
associated canals and channels in the St. Lawrence River.  From
a transportation standpoint, Mr. Prince said, only a canal 35
feet deep would be sensible, but such a canal's construction
cost would be so unjustifiably high that Seaway proponents had
chosen to "get the camel's nose under the tent" by proposing a
smaller facility.  Much to Seaway supporters' chagrin, Mr.
Prince was right about Seaway's dim