RIVER SLOPE ON OTTAWA AND ST. LAWRENCE RIVERS.
TO ESTIMATE THE SLOPE THROUGH RIGOLET HARBOUR.
Narrows :—lm wide, 4M long. Centre depth, 24 to 30 fathoms.
26 April, 1923.
The above is an estimate of the probable amount of “ slope ” in Rigolet Narrows, based on he nearest similar conditions elsewhere. It was made before the expeditions. of 1923 went to Hamilton Inlet, for observations and levelling.
W. BELL DAWSON,
Superintendent of Tidal Surveys.