Salt River Project will begin its annual cleanup and repair of its canals Friday.
The work means that access to some areas may be closed, including Arizona Falls on Indian School Road.
Over time, the canals can fill vegetation and other debris, such as shopping carts, tables and chairs, even cars.
SRP stocks them with white amur, otherwise known as grass carp, to clean out the weeds. But the rest must be removed.
So every year, SRP rounds up the fish and drains some of the canals for cleanup and maintenance.
This year, the work will include repairing monsoon damage. The project should be complete by early February.