HomeMy WebLinkAbout30 - CC-12 - Adopt Plans and Specifications for the - 6/16/2015CITY COUNCIL AGENDA REPORT
MEETING DATE: JUNE 16, 2015
ITEM NUMBER: CC -12
SUBJECT: ADOPT PLANS AND SPECIFICATIONS FOR THE GREENVILLE-BANNING CHANNEL
IMPROVEMENT PROJECT
DATE: JUNE 4, 2015
FROM: PUBLIC SERVICES/ENGINEERING DIVISION
PRESENTATION ERNESTO MUNOZ, PUBLIC SERVICES DIRECTOR
BY:
FOR FURTHER INFORMATION CONTACT: FARIBA FAZELI, CITY ENGINEER- (714) 754-5335
RECOMMENDATION:
Adopt the plans and specifications for the Greenville -Banning Channel Improvement Project.
BACKGROUND:
The Greenville -Banning Channel was originally built in 1958-59 as an earthen trapezoidal
channel. Portions of the channel have since been lined with concrete or rock. This segment of
the channel, from 1,100 feet downstream of California Street to the 1-405 freeway, has
experienced severe erosion and there are stability concerns with its embankments, concrete lining
failure, and stagnant water issues.
The City of Costa Mesa nominated this project for inclusion into the Orange County Flood Control
District (OCFCD) 7 -Year Capital Improvement Program and the project became eligible for
funding in 2012 due to the severe erosion issues and notification from the California Department
of Fish and Wildlife that interim measures to mitigate the on-going erosion and stability issues
would no longer be permitted and that a permanent solution was required.
Construction of the project by the Orange County Public Works Agency involves replacing existing
concrete channel lining that has failed, increasing the channel flow capacity by steepening the
channel embankments, lining unimproved portions of the channel with concrete to eliminate
erosion, and replacing a concrete box culvert at New Hampshire Drive with a larger structure for
additional flow capacity. To allow for on-site runoff infiltration, the majority of the channel bottom
will remain earthen. These improvements will greatly reduce or eliminate the channel bank
erosion issues which are of concern to area residents as well as reduce flood risk.
ANALYSIS:
On March 10th, 2015, the Orange County Board of Supervisors (OCBS) approved the subject
project for advertising and authorized the Orange County Public Works Agency to submit Plans
and Specifications for the Project to the City for approval.
The Orange County Public Works Agency received and opened (5) bids for this project on April
29, 2015. Sukut Construction Inc. was the apparent low bidder with a bid proposal of $5,627,129.
Construction is anticipated to start in July 2015 and be completed within ten months, by May
2016.
A community outreach meeting was conducted by the Orange County Flood Control District
(OCFCD) and the City on October 15, 2014, at the Costa Mesa City Hall. Nearby residents were
invited to attend the meeting. During the meeting, staff gave a detailed description of the project
and reviewed potential impacts during the construction with the residents.
New Hampshire Drive will be closed for a period of up to 10 weeks. Nearby residents were notified
to expect inconveniencies associated with a large construction project such as traffic detours,
construction traffic, and construction noise. The City has coordinated with OCFCD to minimize
the impacts to the residents by specifying reduced construction hours, hauling routes and traffic
detour plans.
Under the California Public Contract Code No. 21020.9, local agencies' approval of the plans and
specifications is required prior to awarding a construction contract.
ALTERNATIVES CONSIDERED:
No alternatives are being considered for this item.
FISCAL REVIEW:
The Orange County Flood Control District (OCFCD) is fully funding this project.
LEGAL REVIEW:
There is no legal review required for this item
CONCLUSION:
The OCFCD is planning to rehabilitate the Greenville -Banning Channel from the 1-405 Freeway
to 1,100 feet west of California Street within the City of Costa Mesa. OCFCD has advertised and
received five bids for the construction of the proposed improvements.
California Public Contract Code 21020.9 requires that the plans and specifications for any work
proposed to be done in any municipality in the District, first be adopted by the legislative body of
the municipality before any contract is awarded. Therefore, staff recommends that the City
Council adopt the plans and specifications for the Greenville -Banning Channel Improvement
Project.
ERNESTO MUNOZ FARIBA FAZELI
Public Services Director City Engineer
ATTACHMENT: Vicinity Map
DISTRIBUTION: Chief Executive Officer
Assistant Chief Executive Officer
City Attorney
City Clerk
it