USA HISTORY

Detailed explanation-1: -Lawrence River, hydrographic system of east-central North America. It starts at the outflow of Lake Ontario and leads into the Atlantic Ocean in the extreme east of Canada, opening much of the interior of the North American continent.

Detailed explanation-2: -Flowing in a northerly direction from Lake Erie to Lake Ontario, a distance of about 35 miles (56 km), the Niagara constitutes part of the boundary between the United States and Canada, separating New York state from the province of Ontario.

Detailed explanation-3: -The Niagara River serves as an international border between the USA & Canada.

Detailed explanation-4: -The Saint Lawrence Watershed lies at the border of New York State and Canada. The Saint Lawrence River serves as the gateway between the North Atlantic and the Great Lakes. At its most downstream point in the Unites States the Saint Lawrence drains an area of nearly 300, 000 square miles.

Detailed explanation-5: -The St. Lawrence River and Seaway is of vital geographic and economic importance to the Great Lakes system, connecting the lakes to the Atlantic Ocean and providing navigation to deep-draft ocean vessels. Approximately 800 miles (1, 287 km) long, the St.