HomeMy WebLinkAbout03 - Big Canyon DiversionCITY OF
NEWPORT BEACH
City Council Staff Report
July 22, 2014
Agenda Item No. 3.
TO: HONORABLE MAYOR AND MEMBERS OF THE CITY COUNCIL
FROM: David A. Webb, Public Works Director- (949) 644 -3330,
dawebb @newportbeachca.gov
PREPARED BY: Bob Stein, Assistant City Engineer
PHONE: (949) 644 -3322
TITLE: Big Canyon Diversion - Completion and Acceptance of Contract No. 5556 (CAP 14-
0029)
ABSTRACT:
On February 25, 2014, City Council awarded Big Canyon Diversion Contract No. 5556 to Bali Construction,
Inc. for a total contract amount of $119,323.58. The required work is now complete and staff requests City
Council acceptance and close out of the contract.
RECOMMENDATION:
a) Accept the completed work and authorize the City Clerk to file a Notice of Completion for the project;
and
b) Authorize the City Clerk to release the Labor and Materials Bond 65 days after the Notice of Completion
has been recorded in accordance with applicable portions of the Civil Code; and release the Faithful
Performance Bond one year after this Council acceptance.
FUNDING REQUIREMENTS:
The following table summarizes costs for the project:
The final construction cost was 8.9 percent above the original contract amount. Upon initiation of the
project, a change in the topography at the outlet of the energy dissipater was discovered. This provided an
opportunity to improve the project design with only a modest increase in project cost. The cost breakdown
is as follows:
% Due
Awarded
Final Cost at
Contingency
to
% Due to
Contract
Completion
Allowance
Actual Contract Change
Directed
Unforeseen
Amount
Change
Change
$119,323.58
$129,975.93
10% or less
8.9%
0.0%
8.9%
Allowed Contract Time
15
Actual Time Under ( -)
0
(days)
or Over +
The final construction cost was 8.9 percent above the original contract amount. Upon initiation of the
project, a change in the topography at the outlet of the energy dissipater was discovered. This provided an
opportunity to improve the project design with only a modest increase in project cost. The cost breakdown
is as follows:
Actual cost of bid items constructed: $ 86,821.93
Total change orders: $ 43,154.00
Final contract cost: $ 129,975.93
Funds for the construction contract were expended from the following accounts:
Account Description Account Number
Sewer Diversion Improvements 7541- C7002004
Sewer Pipeline Point Repairs & Lining 7541- C7001002
Total:
The project was completed on schedule:
Estimated Completion Date per 2013 Baseline Schedule
Project Awarded for Construction
Contract Completion Date with Approved Extensions
Actual Substantial Construction Completion Date
Amount
$ 117,975.93
$ 12,000.00
$ 129,975.93
5/01/2014
2/25/2014
4/30/2014
4/30/2014
DISCUSSION:
Upon finding elevated concentration of selenium in birds and fish in Big Canyon, a study in 2010 revealed
that one of the small streams feeding Big Canyon Wash had high levels of selenium. A design to divert this
small flow to the sanitary sewer was prepared in coordination with staff from the Orange County Sanitation
District (OCSD). The Big Canyon Country Club provided excellent support throughout the project.
The contract is now complete to the satisfaction of the Public Works Department. This project, located near
the 11th Fairway of the Big Canyon Country Club, has now been completed with the stream's low flow to
the sanitary sewer. The diversion appears to have cut selenium concentrations in Big Canyon Wash by at
least 50 %. The diversion will stay in place during the dry season and will be turned off during the rainy
season. While downstream selenium levels have been cut significantly with the completion of this project,
staff still anticipates that one future project, to enhance mixing in the golf course lakes, will still be
necessary to mitigate the build -up of selenite in the sediments of the lakes.
ENVIRONMENTAL REVIEW:
Staff found this project exempt from the California Environmental Quality Act ( "CEQA ") pursuant to
Sections 15301 (minor alteration of existing public facilities) and 15302(c) (replacement of existing facilities
involving negligible expansion of capacity) of the CEQA Guidelines, California Code of Regulations, Title
14, Chapter 3, because it has no potential to have a significant effect on the environment.
NOTICING:
The agenda item has been noticed according to the Brown Act (72 hours in advance of the meeting at
which the City Council considers the item).
ATTACHMENTS:
Description
Attachment A. Location Map
1✓
FASHION
ISLAND
'ROXIMATE
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kNCE TO SITE
BIG CANYON
COUNTRY CLUB
ATTACHMENT A
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ACCESS SITE
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LOCATION MAP
NOT TO SCALE
STORM DRAIN DIVERSION I CITY OF NEWPORT BEACH
BIG CANYON COUNTRY CLUB ALONG FAIRWAY 11 1 PUBLIC WORKS DEPARTMENT
LOCATION MAP
C -5556 1 7/22/14