LOCATION: 0.6 mile upstream of the confluence of Rio Hondo and Los Angeles River, 1.5 miles west of Downey.
REGULATION: Partially regulated by Sierra Madre, Santa Anita, Sawpit, Eaton, Santa Fe, and Whittier Narrows Dams, several debris basins, and spreading grounds.
CHANNEL: Concrete with rip-rap side slopes, trapezoidal in section.
CONTROL: Channel forms control.
LENGTH OF RECORD: At Station F45-R, March 1, 1928 to April 18, 1951; at Station F45B-R, October 31, 1951 to date.
REMARKS: Subject to diversions from Eaton Creek, Monrovia Creek, Sawpit Creek, Little Santa Anita Canyon, and other locations for irrigation and spreading. High flows from San Gabriel River may flow into Rio Hondo above Whittier Narrows Dam.