The primary cause of these changes appears to be due to dredging the Cutoff Channel in the St. Clair River Delta and increased icebreaking by the Coast Guard which has lead to less ice jams in the St. Clair River.
(The primary cause of these changes; appears; ) (the Coast Guard; has lead; to less ice jams in the St. Clair River) (The primary cause of these changes; to be; due to dredging the Cutoff Channel in the St. Clair River Delta) (The primary cause of these changes; increased; icebreaking by the Coast Guard)
The primary cause of these changes the Coast Guard The primary cause of these changes The primary cause of these changes
appears has lead to be increased
to less ice jams in the St. Clair River
due to dredging the Cutoff Channel in the St. Clair River Delta
icebreaking by the Coast Guard