HomeMy WebLinkAboutAgenda Report - November 20, 2019 C-10AGENDA ITEM
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AGENDA TITLE:Accept lmprovements Under Contract for White Slough Water Pollution Control
Facility Storage Expansion and Surface, Agricultural, and Groundwater Supply
lmprovements and Adopt Resolution Ratifying Expênses and Authorizing City
Manager to Execute Change Order No. 3 ($14,729), and Appropriating Funds
($3o,ooo)
MEETING DATE:
PREPARED BY:
November 20,2019
Public Works Director
RECOMMENDED ACTION: Accept improvements under contract for White Slough Water Pollution
Control Facility Storage Expansion and Surface, Agricultural, and
Groundwater Supply lmprovements and adoptresolution ratifying
expenses and authorizing City Manager to execute Change Order No. 3, in the amount of $14,729, and
appropriating funds in the amount of $30,000.
BACKGROUND INFORMATION: This project was awarded to A.M. Stephens Construction Co., lnc.,
of Lodi, on April 18,2018, in the amount of $3,713,005. The
contract has been completed in substantial conformance with the
plans and specifications approved by City Council.
This project included the construction of an a new 30O-acre-foot capacity storage pond that will store
tertiary-treated wastewater, approximately 3,400 feet of 18-inch diameter pipe that will convey water to
and from the new pond, a new pump station to both fill and drain the pond, a new structure that will
monitor and control the flow to the pond, piping connections at two existing structures, associated
electrical/instrumentation improvements, and other incidental and related work.
The original contract completion date was March 15,2019, and the actual completion date was
August 14, 2019. The extension in contract time (172 days) was due to changes requested by the City
and substantial delays associated with Pacific Gas & Electric construction crews providing power to the
project pump station. The final contract price was $3,950,461. The difference between the original
contract amount and the final contract amount is due to three change orders, and reduced unit quantities
of certain bid items. Change orders No. 1 and No. 2 have been approved by the City Manager, per
council authorization. Change order No. 3 exceeds the approved total change order amount of $250,000
and requires City Council approval.
Change Order No. 1 includes mowing of the tall vegetation within the new pond area, additional concrete
ramps into the pond area, and additional one-foot paving width around the new pond ($64,428).
Change Order No. 2 includes adding 36-inch final effluent piping and associated valves as requested by
City staff to improve future plant operations and additional work required by Pacific Gas & Electric to
provide electrical service to the new pump station, additional grading and paving along existing levee
roads, and a new security fence around the pond pump station ($185,133).
APPROVED:
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Change Order No. 3 includes City requested miscellaneous time and materials work associated with
installing the 14-inch final effluent pipe and additional electrical programing work ($14,729). The work
associated with this change order allows staff to isolate and redirect tertiary treated recycled water being
stored in the new storage pond back into the treatment process. This minor change results in a
substantial benefit because it provides an efficient alternate for a backup water supply to Northern
California Power Agency's Lodi Energy Center. Returning to Council for this small increase in
expenditure authority would have delayed project completion.
The total cost of these three change orders is $264,290 , or $14,290 more than the Council authorized
amount of $250,000. Bid item quantity adjustments accounted for a deduction of $26,834, for a total final
contract cost of $3,950,461. The requested appropriation amount is for Change Order No. 3 and staff
time incurred prior to project acceptance.
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.
FISCAL IMPACT:The cost for this work was programmed in the Fiscal Year 2017/18 budget.
The City's cost share is 25 percent and the remaining 75 percent will be
reimbursed through the Proposition 84 Grant. This project does not impact
the General Fund.
FUNDING AVAILABLE: This project was funded by Wastewater Capital
Additional Appropriation Requested:
Wastewater Capital Outlay Fund (531 9900.77020)
Accept lmprovements Under Contract for White Slough Water Pollution Control Facility Storage Expansion and Surface,
lmprovements and Adopt Resolution Ratifying Expenses and Authorizing City Manager to Execute Change Order No. 3
($30,000)
November 20, 2019
Page2
Total
Andrew Keys
Deputy City Manager/lnternal Services Director
Charles E. Swimley, Jr
Public Works Director
Prepared by Gary Wiman, Construction Project Manager
CES/GWtdb
Attachment
Agricultural, and Groundwater Supply
(91 4,729), and Appropriating Funds
$30.000
$30,000
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