Oakley and El Cerrito City Halls

10940 San Pablo Ave., El Cerrito Map
3231 Main St., Oakley Map

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Above: In Oakley, in far east Contra Costa County, runoff from parking at the new city hall flows to a large open area with swales and bioretention ponds as well as picnic areas and large oak trees.
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In more urban El Cerrito, the new city hall shows its creek-related theme in the symbolic creek at its entrance, left.

The reality goes deeper. Roof runoff drains into landscaped areas facing San Pablo Avenue, above, and Kearney Street, below right. Below left, parking-lot runoff drains to a swale, and east of it is the covered trash enclosure, draining to the sanitary sewer.

bgeccityhallswale Oakley and El Cerrito City Hallsbgeccityhallbioretentionoverall Oakley and El Cerrito City HallsBelow, cobbles line shallow depressions in the landscaped area near Kearney — bioretention areas that hold runoff for short times, reducing peak storm flows.bgeccityhalldetention2 Oakley and El Cerrito City Halls