HomeMy WebLinkAbout08 - Semeniuk Slough Maintenance Dredging Project — NOCPORT CITY OF
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NEWPORT BEACH
C��FOR�P City Council Staff Report
September 12, 2017
Agenda Item No. 8
TO: HONORABLE MAYOR AND MEMBERS OF THE CITY COUNCIL
FROM: David A. Webb, Public Works Director - 949-644-3311,
dawebb(@_newportbeachca.gov
PREPARED BY: Bob Stein, Assistant City Engineer, rstein@newportbeachca.gov
PHONE: 949-644-3322
TITLE: Semeniuk Slough Maintenance Dredging Project — Notice of
Completion for Contract No. 3636B (Project No. 15X17)
ABSTRACT:
On October 25, 2016, City Council awarded Contract No. 3636B to restore flood
conveyance capacity in Semeniuk Slough to Innovative Construction Solutions (ICS) of
Santa Ana, California. The 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. On October 25, 2016, City Council found this project
exempt from the California Environmental Quality Act (CEQA) pursuant to Section
15304 (H) (Minor Alterations to Land);
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 the Faithful Performance Bond one (1) year after the acceptance by the
City Council.
FUNDING REQUIREMENTS:
Funds for the construction contract were expensed from the following accounts:
Account Description
Tidelands Maintenance
Caltrans Contributions
Account Number
10001-980000-15X17
13501-980000-15X17
Total:
Amount
$1,285,400.00
300.000.00
$1,585,400.00
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DISCUSSION:
Semeniuk Slough Maintenance Dredging Project —
Notice of Completion for Contract No. 3636B (15X17)
September 12, 2017
Page 2
Overall Contract Cost/Time Summary
Awarded
Final Cost at
Contingency
Actual
% Due to
% Due to
Contract Amount
Completion
Allowance
Contract
Directed
Unforeseen
Change
Change
Change
$1,572,800.00
$1,585,400.00
10% or less
+0.8%
+0.8%
-
Allowed Contract Time +
120
Actual Time
25
Approved Extensions (days) =
Under (-) or Over (+)
The work necessary to complete this contract consisted of constructing a temporary
sheet pile cofferdam across the channel at the north end, dewatering the channel,
removing 9,600 cubic yards of sediment from the slough which included 1,100 cubic
yards of sediment removed from the portion of the slough owned by Caltrans, removing
the cofferdam, installing native vegetation in disturbed areas, reinstalling fencing, and
restoring the access gravel road (Note that Caltrans elected not to perform any
sediment removal at this time from its 14 -foot wide culvert as originally anticipated).
The public portion of the Semeniuk Slough has now been restored to its original depth
of three feet below the Mean Lower Low Water and 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:
Actual Cost of Bid Items Constructed:
Total Change Orders:
$1,572,800.00
$1,585,400.00
$ 0.00
Final Contract Cost: $1,585,400.00
The actual cost of bid items constructed was $12,600.00 more than the original bid
amount due to actual amount of sediment removed.
A summary of the project milestones is as follows:
Estimated Start of Construction per Annual Baseline Schedule
10/3/16
Actual Start of Construction Per Notice To Proceed
12/27/16
Extended Contract Completion Date Inclusive of Extra Work
4/26/17
Actual Substantial Construction Completion Date
4/1/17
The project was substantially complete as of April 1, 2017. The contractor completed its
60 -day plant maintenance requirements on July 31, 2017.
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Semeniuk Slough Maintenance Dredging Project —
Notice of Completion for Contract No. 3636B (15X17)
September 12, 2017
Page 3
ENVIRONMENTAL REVIEW:
At the October 25, 2016 City Council meeting, the project was found to be exempt from
the California Environmental Quality Act (CEQA) pursuant to Section 15304 (H) (Minor
Alterations to Land) 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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e 0 125 Oso
Feet
Pf
Cofferdamn Location
Additional Excavation by City Contractor as feasible
Base Project by City Contractor
Box Culvert Excavation by Caltrans
Caltrans Area Excavated by City Contrator
Semeniuk Slough Award
City of Newport Beach
GIS Division
September 12, 2016
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