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Bidjugde
JOB
Big Canyon Restoration
BID DATE
08/23/16 - 11:00
AGENCY
Newport Beach
ESTIMATE
$1,900,000
SCOPE
The work associated with Project Preparation includes preparing SWPPP and implementing erosion control measures, performing construction surveying, clearing and grubbing, stockpiling woody material for mulching, identifying and removing trees, if any, infected trees with Polyphagous Shot Hole Borer, stockpiling top soil, grading, and constructing temporary surface water diversions or controlling groundwater if needed. The work associated with the stormwater capture and treatment includes constructing stormwater drainage piping and structures to capture stormflows from Jamboree Road including installing a Water Quality Unit, installing piping to rout storm flows into a Bioretention Cell infiltration system which includes a special soil mixture to support plant growth and infiltration, and installing outlet piping. The work associated with the dryweather flow capture and treatment includes constructing a clean water bypass manhole and piping from the golf course including both underground and above ground piping sections with anchoring system, constructing a concrete stilling pool just downstream of the existing culvert under Jamboree Road along with concrete embankment slope protection and stilling basin end wall, constructing an inlet within the stilling basin to divert the seep flow into a clarifier and a through a flow meter contained housed in a manhole (note this area is supported by a retaining wall), and then connecting the seep flow pipe into a OCSD sanitary sewer line. The work associated with the floodplain improvement and habitat restoration includes constructing vegetated soil revetments along the creek channel, constructing boulder step-downs within channel, extending a potable water line and constructing a temporary irrigation system, performing site restoration work including adding soil amendments, re-vegetation and hydroseeding, and performing plant establishment and maintenance.The work associated with Miscellaneous Components includes install CMB and decomposed granite on access roads and trail ramp, and constructing an access road entry and gate off of Jamboree Road. Bob Stein - 949-644-3322 rstein@newportbeachca.gov

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