The Seguin continues through Mountain Chute to reach Mill Lake in the town of Parry Sound , where it takes in the left tributary Haines Creek , heads under Ontario Highway 400 then over Mill Lake Dam .
The Seguin takes in the right tributary Darlington 's Creek .
The Seguin continues through Mountain Chute to reach Mill Lake in the town of Parry Sound , where it takes in the left tributary Haines Creek , heads under Ontario Highway 400 then over Mill Lake Dam , and takes in the right tributary Darlington 's Creek .