LOCATION: Approximately 200 feet below San Gabriel Dam No 2, and approximately 7 miles above the junction of the east and west forks of the San Gabriel River.
REGULATION: Except for the bank runoff from a very small area below the dam, the flow is entirely regulated by Cogswell Dam.
DIVERSION: Water released from Cogswell Dam enters river below station F251-R.
CHANNEL: Sand and gravel, natural section.
LENGTH OF RECORD: Recorder records from April 26, 1935 to October 9, 1935 and from March 7, 1936 to September 30, 1936. Discharged measurement only, October 10, 1935 to March 6, 1936. From October 1, 1988 to date.