The King County Water District 54 reservoir is located in Des Moines on 11th Avenue between City Hall and the Police Department.
Effects of airplane exhaust
An interesting way to see the effects of airplane exhaust from take-offs heading south from Sea-Tac Airport is to look at this tower.
Here are two pictures taken on the same day and time (04/01/2021 4:00PM)
South side (behind take-off path)
North side (facing take-off path)