Navigation Improvements in Barnhart Island-Cornwall Island Reach, St. Lawrence River: Hydraulic Model Investigation.
Technical rept. May 55-Jun 58,
ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS
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The investigations were concerned primarily with the improvement of South Channel, a reach about 7 miles long, to satisfy navigation criteria and also to assure continuation of the present 14-ft-draft navigation during construction of improvement plans. Interrelated with the South Channel improvement was the enlargement of North Channel to maintain the established discharge distribution and to obtain maximum benefits for navigation and power. Two models were used in the investigations. The Cornwall Island model, constructed to an undistorted scale of 1100 for detailed study of the crosscurrents produced by flow from Pollys Gut, reproduced all features from the head of Pollys Gut to about the mid-point of Cornwall Island. The Barnhart Island-Lake St. Francis model, constructed to linear scale ratios of 1100 vertically and 1300 horizontally, reproduced a longer reach of the river extending from the Barnhart Island powerhouse to the lower end of St. Regis Island.
- Civil Engineering