HomeMy WebLinkAboutA001 - Council Action Form dated March 10, 2026ITEM #:18
DATE:03-10-26
DEPT:W&PC
SUBJECT:CHANGE ORDER NO. 1 WITH TERRACON FOR SPECIAL TESTING
ASSOCIATED WITH THE WATER POLLUTION CONTROL FACILITY
NUTRIENT REDUCTION MODIFICATIONS PHASE I PROJECT
COUNCIL ACTION FORM
BACKGROUND:
On September 4, 2024, Council awarded a contract to Terracon Consultants to provide
concrete and geotechnical testing services for the Water Pollution Control Facility Nutrient
Reduction Modifications Phase I project, in the amount of $67,885. Third-party inspections for
these services are essential in ensuring that the materials incorporated into the finished
project meet the design requirements.
The contract with Terracon was based on the planned construction schedule and
sequence, with an estimate of the number of days that an inspector would be needed
on-site and an estimate of the number of tests that would be necessary over the two-
plus years of construction. As the construction has progressed, the allowance for
testing has been utilized faster than anticipated. There is still a significant amount of
vertical, structural concrete left to be poured and continuing the testing services is
essential.
Staff has reviewed the remaining work schedule with Terracon, the general contractor, and the
design engineer in order to develop a change order that all parties believe will be sufficient to
complete the necessary testing. Funding and expenses for the project are shown in the table
below, reflecting the updated balance should this change order be approved.
Table 1: Total Project Funding & Expenses
Funding Expenses
Prior Years
FY 2023 1,000,472
FY 2024 1,438,643
FY 2025 18,573,090
FY 2026 Adjusted 34,384,990
FY 2027 7,250,000
WTFAP Grant 500,000
Engineering
6,038,000
Construction
Original Contract 53,370,000
Change Order #1 (231,878)
Change Order #2 (25,280)
Change Order #3 10,836
Change Order #4 13,459
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Change Order #5 (40,743)
Change Order #6 71,845
Change Order #7 44,527
Change Order #8 3,842
Owner Allowance (furnishings, etc.) 400,000
Special Inspections
Original Contract 67,855
Change Order #1 - This Action 35,205
All Other Expenses 54,820
TOTAL 63,067,195 59,812,488
Available Contingency 3,254,707
ALTERNATIVES:
1. Approve Change Order No. 1 to the agreement with Terracon for special testing
associated with the Nutrient Reduction Modifications Project in an amount not to exceed
$35,205.
2. Do not approve the change order at this time. This would result in the remaining concrete
materials not being tested.
CITY MANAGER'S RECOMMENDED ACTION:
Large construction projects utilize specialized construction materials and techniques. Often,
these methods require independent third-party inspections to ensure that the finished product
meets the quality standards that are specified. For the WPCF Nutrient Removal Modifications
project, these inspections have included, among other things, concrete testing. These tests
are critical to verify that the concrete being delivered to the site meets the required strength
and mix specifications.
The contract with the third-party testing firm, Terracon, was initially prepared based on
an estimated number of days of on-site work and number of testing events. The actual
construction sequence has required additional time and effort. Staff has reviewed the
remaining work with Terracon, as well as the general contractor and the design
engineer, and believes that the proposed change order will be sufficient to complete the
project.
There are sufficient funds available in the approved budget to cover the additional work.
Therefore, it is the recommendation of the City Manager that the City Council adopt alternative
number 1 as described above.
ATTACHMENT(S):
CO #1 PO 63770.pdf
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