OWP will be closed from 4:00 pm on Friday, December 20, 2024, until 8:00 am on Thursday, January 2, 2025, for Winter Break.
(All times are PST.)
For students in Canada: Due to the ongoing Canada Post strike, please use UPS or FedEx to return your scantrons for grading. You may take your exams online even if you received paper exams.
If exams are submitted: |
Course certificates will be mailed: |
By December 13th |
By December 20th |
After December 20th |
Early January |
Please note: Postmark dates will not be honored.
Water and Wastewater Terms Beginning B
A B C D E F G H I J K L M N O P Q R S T U V W Y Z
backwater gate
A gate installed at the end of a drain or outlet pipe to prevent the backward flow of water or wastewater. Generally used on stormwater collection outlets into streams to prevent backward flow during times of flood or high tide. Also called a tide gate. Also see check valve and flap gate.