NFC Projects in Design - East Garden Grove-Wintersburg
Channel
East Garden Grove-Wintersburg Channel
OCFCD Facility No. C05
The Tide Gates (Station 6+34) to upstream of Warner Avenue (Station 102+02)
Located in City of Huntington
Beach
Supervisorial District 2
East Garden Grove- Wintersburg Pedestrian
Access Extension Letter
Project Information
OC Public Works plans to construct improvements to the East Garden Grove-Wintersburg
Channel (EGGWC) from the Tide Gates (near Pacific Coast Highway) to upstream of
the Warner Avenue Bridge. The subject channel reach is approximately two miles long.
The EGGWC system, together with its tributary Oceanview Channel, drains approximately
28 square miles of watershed in central Orange County. Current Orange County Flood
Control District (OCFCD) standards require the system to be designed for a 100-year
storm event. The channel was designed and built in the 1960s to convey approximately
65% of the 25-year storm event. The lower reach of the channel system from downstream
of Warner Avenue Bridge to the Tide Gates is an earthen trapezoidal channel with
levee heights above surrounding ground. The levees have continued to deteriorate
due to major storms since 2005, and on October 16, 2007, the Orange County Board
of Supervisors declared an emergency due to the risk of flooding nearby homes. Emergency
work to drive 3800 feet of steel sheet piles along the northerly levee, downstream
of Graham Street, was completed in February 2008.
The planned improvements begin at the Tide Gates and end upstream of Warner Avenue.
The scope of work includes reinforcing the levees between the Tide Gates and the
Oil Access Road Bridge; constructing soil-mixed (soil mixed with cement) columns
sandwiched between two rows of steel sheet piles between Graham Street and Warner
Avenue, both sides, and 2000 feet downstream of Graham Street to Graham Street,
south levee only; excavating the earthen embankment to widen the channel and increase
in channel flood conveyance capacity; and constructing a recreational trail and
access ramp on the southerly levee from the Oil Access Road Bridge to 2000 feet
downstream of Graham Street.
Public Meeting and Notification
Date: December 14, 2010, 7:00 PM
Venue: Marine View Middle School
5682 Tilburg Drive, Huntington Beach, CA 92649
Project Presentation: Flyer 1
and Flyer 2
Power Point Presentation
Questions and Answers
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