Master Plan of Drainage

Master Plan of Drainage Background

The existing "General City" storm drainage network is composed of street gutter facilities, inlets and pipeline network of storm drain lines which convey runoff to various smaller creeks located throughout the city leading to other small creeks such as the San Antonio Channel, Cypress Channel, and Chino Creek. These creeks have served as a convenient source of storm water disposal for several years, generally leading storm water runoff to the El Prado Control Basin. The majority of the existing storm drains were based on the Comprehensive Storm Drain Plan Number 1, a drainage master plan study prepared in 1966 for the San Bernardino County Flood Control District. In 1993, the City implemented its hydrological analysis of the master plan study area to reevaluate the existing drainage systems and develop a more up-to-date Master Plan of Drainage.

In 1998, the Master Plan of Drainage was revised (Revision Number 1) to include Subarea 1, which identified capacity expansion due to the addition of 11.25 square miles in the southwest area of the City. The study area was encompassed by Kimball Avenue to the north, Euclid Avenue to the east, Prado Basin to the south and Chino Creek to the west. Impacts to the land-use changes from the agricultural to the combination of agricultural and industrial land developments were reanalyzed for several major segments of the City's western storm drain system.

In 2003, the Master Plan of Drainage was revised (Revision Number 2) to include Subarea 2 "The Preserve", which identified capacity expansion due to the addition of 8.5 square miles in the southeast area of the City. The study area was encompassed by Ontario (New Model Colony area) to the north, Riverside County to the south and east, and Euclid Avenue to the west. Impacts to the land-use changes from the agricultural and open space to the combination of mixed land development use were reanalyzed for several major segments of the City's eastern storm drain system. Drainage Basin Areas were added and redefined from the Chino Airport Master Plan and Ontario's New Model Colony Drainage Master Plan.

Lastly, in 2004 and 2007, two unofficial amendments were prepared to update Revision 2, which identified revisions necessary for the Drainage Basins B, D, and J, and Drainage Basin G respectively for the ultimate build-out of The Preserve area.