Are the commas in the right place, thanks!!!

At the end of construction, in 1959, the Seaway had seven locks and a depth of at least 27 feet.

The only correction is to take out the comma after "construction."

Are the commas in the right place?!

The Saint Lawrence Seaway, a majorwaterway, allows ocean-going vessels to travel between the Great Lakes and the Atlantic Ocean.

Yes, the commas in the sentence "At the end of construction, in 1959, the Seaway had seven locks and a depth of at least 27 feet" are correctly placed. The first comma is used to set off the introductory phrase "At the end of construction," and the second comma is used to separate the nonrestrictive clause "in 1959" from the main part of the sentence.

Yes, the commas in the sentence "At the end of construction, in 1959, the Seaway had seven locks and a depth of at least 27 feet" are correctly placed.

To determine if the commas are in the right place, let's break down the sentence:

"At the end of construction" provides additional information about the timing of the Seaway's characteristics and is set off by commas. This is an example of an introductory phrase, which is separated from the main clause with a comma.

The phrase "in 1959" specifies a specific year and is also set off by commas. It provides additional information about the time period and is considered an explanatory or nonessential phrase, which is enclosed by commas.

"The Seaway had seven locks and a depth of at least 27 feet" is the main clause of the sentence and does not require any additional punctuation.

Therefore, the commas in the sentence "At the end of construction, in 1959, the Seaway had seven locks and a depth of at least 27 feet" are correctly placed.