HomeMy WebLinkAbout07 - Big Canyon Reservoir Flow Metering Vault and Treatment Improvements — Notice of CompletionTO:
FROM
CITY OF
NEWPORT BEACH
City Council Staff Report
May 14, 2019
Agenda Item No. 7
HONORABLE MAYOR AND MEMBERS OF THE CITY COUNCIL
David A. Webb, Public Works Director - 949-644-3311,
dawebb@newportbeachca.gov
PREPARED BY: Benjamin Davis, Associate Civil Engineer
bdavis@newportbeachca.gov
PHONE: 949-644-3317
TITLE: Big Canyon Reservoir Flow Metering Vault and Treatment
Improvements — Notice of Completion for Contract No. 6104 (16W13)
ABSTRACT:
On August 8, 2017, City Council awarded Contract No. 6104 for the Big Canyon Reservoir
Flow Metering Vault and Treatment Improvements project to Schuler Constructors, Inc.
The work is 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. On August 8, 2017, City Council found this project exempt from the
California Environmental Quality Act (CEQA) pursuant to Section 15302 (c);
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
c) Release Faithful Performance Bond one year after acceptance by City Council.
FUNDING REQUIREMENTS:
Funds for the construction contract were expensed from the following accounts:
Account Description Account Number Amount
Water Enterprise 70101-980000-16W13 $ 850,500.00
Water Capital NMP 70201932-980000-16W13 $ 923,052.03
Total: $1,773,552.03
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Big Canyon Reservoir Flow Metering Vault and Treatment Improvements —
Notice of Completion for Contract No. 6104 (16W13)
DISCUSSION:
Overall Contract Cost/Time Summary
May 14, 2019
Page 2
Awarded
Final Cost at
Contingency
Actual
% Due to
% Due to
Contract Amount
Completion
Allowance
Contract
Directed
Unforeseen
Change
Change
Change
$1,610,500.00
$1,773,552.03
10% or less
10.1%
5.8%
4.3%
Allowed Contract Time +
351
Actual Time
-2
Approved Extensions (days) =
Under (-) or Over (+)
The work necessary to complete this contract included the construction of a concrete
vault to house a new 30 -inch magnetic flow meter, construction of two new potable water
mixing systems and replacement of an existing 8 -ton crane. Potable water mixing is now
achieved with the mixing systems that handle high and low flow conditions. The first
mixing device is a 42 -inch Ultra Tab static mixer that handles the medium to high flow
conditions. The second device is a hydraulic mixing system that uses three jet nozzles
to address low flow conditions.
The contracted work has now been completed to the satisfaction of the Public Works
Department. A summary of the construction cost is as follows:
Original Bid Amount:
$1,610,500.00
Actual Cost of Bid Items Constructed:
$1,610,500.00
Total Change Orders:
$163,052.03
Final Contract Cost:
$1,773,552.03
The actual cost of bid items constructed matched the original bid amount. There were a
total of four change orders that added $163,052.03 to the final cost. The first change
order replaced a critical 30 -inch butterfly valve that was found inoperable due to age and
corrosion build up. The second change order was for an unforeseen condition on a new
gate valve that required modifications to meet the design requirements. The third change
order was for additional paving at the Big Canyon Reservoir site. This paving work is
identified as part of a separate capital improvement project and was added into this
contract to reduce overhead and logistic costs associated with bringing in a separate
contractor to do the planned paving. The last change order covered a directed change
to improve the chlorine resistant coating of the static mixer. The total cost of construction,
including all change orders, was $1,773,552.03, which is approximately 10 percent above
the original bid amount.
Utilities Department staff tested the new mixing systems and reported success during all
flow conditions. The new magnetic flow meter is operating and giving staff improved
accuracy monitoring flows in and out of the reservoir. This project has succeeded in
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Big Canyon Reservoir Flow Metering Vault and Treatment Improvements —
Notice of Completion for Contract No. 6104 (16W13)
May 14, 2019
Page 3
delivering all the design goals for improving mixing, improving water quality and delivering
accurate flow measurement.
The project was substantially complete as of February 21, 2019. A summary of the project
schedule is as follows:
Estimated Start of Construction per Annual Baseline Schedule September 9, 2017
Actual Start of Construction Per Notice To Proceed September 9, 2017
Contract Completion Date Including Approved Time Extensions February 25, 2019
Actual Substantial Construction Completion Date February 21, 2019
The long construction duration for this project was necessary since the reservoir had to
be operational during peak water demand, which is from March to September. Therefore,
the contractor was not able to work during this time period and was allowed additional
time to complete the contract after the peak water demand period.
ENVIRONMENTAL REVIEW:
On August 8, 2017, City Council found this project exempt from the California
Environmental Quality Act (CEQA) pursuant to Section 15302(c) 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).
ATTACHMENT:
Attachment A — Location Map
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BIG CANYON RESERVOIR FLOW METERING VAULT CITY OF NEWPORT BEACH
PUBLIC WORKS DEPARTMENT
AND TREATMENT IMPROVEMENTS
LOCATION MAP 05/14/2019
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