HomeMy WebLinkAbout06 - 38th Street Tidal StructureCITY OF NEWPORT BEACH
CITY COUNCIL STAFF REPORT
Agenda Item No. 6
June 23, 2009
TO: HONORABLE MAYOR AND MEMBERS OF THE CITY COUNCIL
FROM: Public Works Department
Tom Sandefur
949 - 644 -3312 or tsandefur @city.newport- beach.ca.us
SUBJECT: 38TH STREET TIDAL STRUCTURE I TIDE VALVE— COMPLETION AND
ACCEPTANCE OF CONTRACT NO. 3954
RECOMMENDATIONS:
1. Accept the completed contract work and Authorize the City Clerk to file a Notice
of Completion.
2. Authorize the City Clerk to release the Labor and Materials bond 35 days after
the Notice of Completion has been recorded in accordance with applicable
portions of the Civil Code.
3. Release the Faithful Performance Bond 1 year after Council acceptance.
DISCUSSION:
On June 10, 2008, the City Council authorized the award of the 38`" Street Tidal
Structure / Tide Valve project to GCI Construction, Inc. The contract provided for
removing interfering portions of existing valve vault, removing and replacing sluice gate,
installing electric actuator, constructing valve vault modifications, installing new valve
vault hatch, installing conduits, pulling conductors through existing streetlight conduits,
connecting electrical facilities, miscellaneous concrete improvements, installing new
vault ladder, and repairing surface improvements.
The contract has now been completed to the satisfaction of the Public Works
Department. A summary of the contract cost is as follows:
Original bid amount: $92,800.00
Actual amount of bid items constructed: $92,355.00
Total amount of change order: $6,340.80
Final contract cost: $98,695.80
The decrease in the amount of actual bid items constructed over the original bid
amount resulted from the increase of sidewalk needed to provide access to the tidal
structure and the decrease in the number of plants that had to be relocated for the
project. The net result was a decrease of $445.00 in bid items. There were three
38°i Street Tidal Structure / Tide Valve - Completion and Acceptance of Contract No. 3954
June 23, 2009
Page 2
Contract Change Orders related to this project. Change Order 1 modified the proposed
ladder to meet OSHA requirements. Change Order 2 provided for additional materials
to be used as replacement parts should this valve or any of the similar valves in the City
need repair. Change Order 3 wired a disconnect system into the vault and modified the
stainless steel enclosure housing the valve's remote control systems. The final overall
construction cost including one change order was 1.6 percent over the original bid
amount.
A summary of the project schedule is as follows:
Estimated completion date per June '08 schedule: December 19, 2008
Project award for construction: June 10, 2008
Estimated completion date at award: December 10, 2008
Revised completion date: May 26, 2009
Actual substantial construction completion date: January 14, 2009
All the heavy construction work, other than installing the manufactured valve, was
completed in early January 2009. The project suffered significant delay due to
manufacturing problems related to the tide valve. After the installation of the new tide
valve, it was observed that the collar around the valve was cracked. The valve had to
be removed from the tide structure and shipped back to the manufacturer. The second
valve had mounting holes located in the wrong place. That valve was also shipped
back to the manufacturer. The third valve did not fit snugly into its seat so it began
leaking profusely. The valve was removed and mounting nuts were attached to allow
for the valve to sit flush and make a proper seal. Each time the valve was removed,
recast, and reinstalled, there resulted a project delay of six weeks. The valve now
performs as required and is acceptable for the completion of the contract.
In addition to the primary construction contract, this project involved other project
expenses. Total project expenses are summarized as follows:
Construction $98,695.80
Incidentals $92.07
Total Project Cost $98,787.87
Environmental Review:
The project was determined to be exempt from the California Environmental Quality Act
(CEQA) pursuant to Section 15301 of the CEQA Implementation Guidelines at the time
the project was authorized by the City Council. This exemption covers the repair of
existing facilities involving negligible or no expansion of existing use.
38� Street Tidal Structure / Tide Valve - Completion and Acceptance of Contract No. 3954
June 23, 2009
Page 3
Funding Availability:
Funds for the construction contract were expended from the following account:
Account Description
Tide and Submerged
Lands
Prepared by:
A
Torn Sandefur
Associate Civil Engineer
Account Number Amount
7231- C2502001 $98,787.87
Total: $98,787.87
Submitted by:
Works Director