HomeMy WebLinkAboutAgenda Report - May 17, 2023 C-07CITY OF
a o z
CALIFORNIA
AGENDA ITEM
C•7
COUNCIL COMMUNICATION
AGENDA TITLE: Accept Improvements Under Contract for Wastewater Main Rehabilitation Program
(Project No. 9)
MEETING DATE: May 17, 2023
PREPARED BY: Public Works Director
RECOMMENDED ACTION: Accept improvements under contract for Wastewater Main Rehabilitation
Program (Project No. 9).
BACKGROUND INFORMATION: The Wastewater Main Rehabilitation Program is intended to systematically
replace and repair existing wastewater infrastructure that has reached its
useful life. This is the ninth project scheduled in this program.
Project No. 9 rehabilitated approximately 1200 lineal feet of 24 -inch and 30 -inch diameter wastewater trunk
lines running south from Ham Lane and Park Street, continuing along the east side of the WID Canal, ending at
Century Boulevard. Lining for these pipes has been completed, improving the level of service, increasing
reliability and reducing risk of pipeline failures. As with previous phases of the project, trenchless methods of
rehabilitation were used to minimize both surface disruption and costs. The project also rehabilitated 16
wastewater manholes, see attached Exhibit A.
The original contract amount was $1,656,535. The final cost of the contract was $1,688,072.39 and was
completed in substantial conformance with the specifications approved by City Council. There was one change
order incorporating two items totaling $31,537.39. Item 1 revised unit item quantities to match work performed
amounting to a credit in the amount of $33,849. Item 2 included work requested by staff amounting to
$65,386.39.
The additional work requested by staff included cleaning and evaluation of additional 1500 lineal feet of wastewater
lines ($16,199.81), additional cleaning of heavy debris from vacon decanting at MSC ($16,965.30), additional
mobilization due to rain delays ($14,278.75), and other minor items.
The original contract was 90 days. Change Order No. 1 added 120 calendar days for excessive rain events when
bypass work was not permitted. Pre -construction and post -construction photos of a sample manhole rehabilitation
and wastewater line rehabilitation are shown in Exhibit B.
Following acceptance by the City Council, as required by law, the City Engineer will file a Notice of Completion
with the County Recorder's office. The notice serves to notify vendors and subcontractors that the project is
complete and begins their 30 -day period to file a stop notice requiring the City to withhold payments from the
prime contractor in the event of a payment dispute.
APPROVED-- _._....,....,,, «, t.,y 3 7f1,T11.31 PGT
Stephen Schwabauer, City Manager
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5/4/2023
Accept Improvements Under Contract for Wastewater Main Rehabilitation Program (Project No. 9)
May 17, 2023
Page 2
FISCAL IMPACT: Completing this project will reduce future maintenance costs and increase the
performance and reliability of the wastewater system. This project will not impact
the General Fund.
FUNDING AVAILABLE: This project was funded by Wastewater Capital (53199000.77020):
UM --0
Charles E. Swimley, Jr.
Public Works Director
Prepared by Jimi Billigmeier, Associate Civil Engineer
CES/JB/cd
Attachments
cc: Andrew Richle, Utilities Superintendent
Travis Kahrs, Water Plant Superintendent
\\cvcfilvo2\pubwks$\WP\PROJECTS\SEWER\WastewaterRehabProject9\CAcceptl.docx 5/4/2023
Wastewater Main Rehabilitation Program - Project No. 9
Exhibit A
Legend
Pipelines Rehabilitated
LJ
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N
W-
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S
500 1,000 2,000
Feet
44 ti
USMH: Q1514
DSMH: NEN: MH
AMH
Access Point Manhole
31,7
USI. H: P1546
DS%4 NEW MH
12.6
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obi scellaneo:ls
6Vate, Level
V�T �.
_hr
F,
Sim
1
a '
Nr
USMH: Q1514
DSMH: NEN: MH
AMH
Access Point Manhole
31,7
USI. H: P1546
DS%4 NEW MH
12.6