Final Dam Hearing.

The final hearing on the Charles River Dam was held yesterday morning. Dr. Henry J. Barnes, who appeared for the Tufts Medical School, said that if a permanent dam were constructed the Fens Basin would become a stagnant pool and that sewage would collect there in the absence of frequent flushings.

Lewis S. Dabney, representing the Beacon street residents objected to the dam on the grounds that it would create a mill-pond, full of sewage, with a sluggish river flowing into one end of it.