Below Hidden Dam, the Fresno River provides water to Madera Lake via an unnamed distributary. Excess flow from the lake is returned to the Fresno River by the lake's dam. Further downstream, on the northeast edge of Madera, is the John Franchi Diversion Dam, a  high, -wide earth and steel dam that is used to divert water into the Big Main Canal.
Below Hidden Dam, the Fresno River supplies water to Madera Lake through an unnamed tributary. Excess water from the lake is redirected back into the Fresno River by the lake's dam. Further downstream, on the northeastern side of Madera, is the John Franchi Diversion Dam, a tall, wide earthen and steel structure used to channel water into the Big Main Canal.